mirror of
https://github.com/git/git.git
synced 2024-12-19 06:43:52 +08:00
1696d72321
The POSIX standard specifies a return type of int for all six exec functions. In addition, all exec functions return -1 on error, and simply do not return on success. However, the current emulation of the exec functions on mingw are declared with a void return type. This would cause a problem should any code attempt to call the exec function in a non-void context. In particular, if an exec function were used in a conditional it would fail to compile. In order to improve the fidelity of the emulation, we change the return type of the mingw_execv[p] functions to int and return -1 on error. Signed-off-by: Ramsay Jones <ramsay@ramsay1.demon.co.uk> Signed-off-by: Junio C Hamano <gitster@pobox.com>
1768 lines
44 KiB
C
1768 lines
44 KiB
C
#include "../git-compat-util.h"
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#include "win32.h"
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#include <conio.h>
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#include "../strbuf.h"
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#include "../run-command.h"
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static const int delay[] = { 0, 1, 10, 20, 40 };
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int err_win_to_posix(DWORD winerr)
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{
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int error = ENOSYS;
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switch(winerr) {
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case ERROR_ACCESS_DENIED: error = EACCES; break;
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case ERROR_ACCOUNT_DISABLED: error = EACCES; break;
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case ERROR_ACCOUNT_RESTRICTION: error = EACCES; break;
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case ERROR_ALREADY_ASSIGNED: error = EBUSY; break;
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case ERROR_ALREADY_EXISTS: error = EEXIST; break;
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case ERROR_ARITHMETIC_OVERFLOW: error = ERANGE; break;
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case ERROR_BAD_COMMAND: error = EIO; break;
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case ERROR_BAD_DEVICE: error = ENODEV; break;
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case ERROR_BAD_DRIVER_LEVEL: error = ENXIO; break;
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case ERROR_BAD_EXE_FORMAT: error = ENOEXEC; break;
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case ERROR_BAD_FORMAT: error = ENOEXEC; break;
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case ERROR_BAD_LENGTH: error = EINVAL; break;
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case ERROR_BAD_PATHNAME: error = ENOENT; break;
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case ERROR_BAD_PIPE: error = EPIPE; break;
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case ERROR_BAD_UNIT: error = ENODEV; break;
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case ERROR_BAD_USERNAME: error = EINVAL; break;
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case ERROR_BROKEN_PIPE: error = EPIPE; break;
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case ERROR_BUFFER_OVERFLOW: error = ENAMETOOLONG; break;
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case ERROR_BUSY: error = EBUSY; break;
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case ERROR_BUSY_DRIVE: error = EBUSY; break;
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case ERROR_CALL_NOT_IMPLEMENTED: error = ENOSYS; break;
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case ERROR_CANNOT_MAKE: error = EACCES; break;
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case ERROR_CANTOPEN: error = EIO; break;
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case ERROR_CANTREAD: error = EIO; break;
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case ERROR_CANTWRITE: error = EIO; break;
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case ERROR_CRC: error = EIO; break;
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case ERROR_CURRENT_DIRECTORY: error = EACCES; break;
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case ERROR_DEVICE_IN_USE: error = EBUSY; break;
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case ERROR_DEV_NOT_EXIST: error = ENODEV; break;
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case ERROR_DIRECTORY: error = EINVAL; break;
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case ERROR_DIR_NOT_EMPTY: error = ENOTEMPTY; break;
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case ERROR_DISK_CHANGE: error = EIO; break;
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case ERROR_DISK_FULL: error = ENOSPC; break;
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case ERROR_DRIVE_LOCKED: error = EBUSY; break;
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case ERROR_ENVVAR_NOT_FOUND: error = EINVAL; break;
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case ERROR_EXE_MARKED_INVALID: error = ENOEXEC; break;
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case ERROR_FILENAME_EXCED_RANGE: error = ENAMETOOLONG; break;
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case ERROR_FILE_EXISTS: error = EEXIST; break;
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case ERROR_FILE_INVALID: error = ENODEV; break;
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case ERROR_FILE_NOT_FOUND: error = ENOENT; break;
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case ERROR_GEN_FAILURE: error = EIO; break;
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case ERROR_HANDLE_DISK_FULL: error = ENOSPC; break;
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case ERROR_INSUFFICIENT_BUFFER: error = ENOMEM; break;
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case ERROR_INVALID_ACCESS: error = EACCES; break;
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case ERROR_INVALID_ADDRESS: error = EFAULT; break;
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case ERROR_INVALID_BLOCK: error = EFAULT; break;
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case ERROR_INVALID_DATA: error = EINVAL; break;
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case ERROR_INVALID_DRIVE: error = ENODEV; break;
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case ERROR_INVALID_EXE_SIGNATURE: error = ENOEXEC; break;
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case ERROR_INVALID_FLAGS: error = EINVAL; break;
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case ERROR_INVALID_FUNCTION: error = ENOSYS; break;
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case ERROR_INVALID_HANDLE: error = EBADF; break;
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case ERROR_INVALID_LOGON_HOURS: error = EACCES; break;
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case ERROR_INVALID_NAME: error = EINVAL; break;
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case ERROR_INVALID_OWNER: error = EINVAL; break;
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case ERROR_INVALID_PARAMETER: error = EINVAL; break;
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case ERROR_INVALID_PASSWORD: error = EPERM; break;
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case ERROR_INVALID_PRIMARY_GROUP: error = EINVAL; break;
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case ERROR_INVALID_SIGNAL_NUMBER: error = EINVAL; break;
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case ERROR_INVALID_TARGET_HANDLE: error = EIO; break;
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case ERROR_INVALID_WORKSTATION: error = EACCES; break;
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case ERROR_IO_DEVICE: error = EIO; break;
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case ERROR_IO_INCOMPLETE: error = EINTR; break;
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case ERROR_LOCKED: error = EBUSY; break;
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case ERROR_LOCK_VIOLATION: error = EACCES; break;
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case ERROR_LOGON_FAILURE: error = EACCES; break;
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case ERROR_MAPPED_ALIGNMENT: error = EINVAL; break;
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case ERROR_META_EXPANSION_TOO_LONG: error = E2BIG; break;
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case ERROR_MORE_DATA: error = EPIPE; break;
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case ERROR_NEGATIVE_SEEK: error = ESPIPE; break;
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case ERROR_NOACCESS: error = EFAULT; break;
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case ERROR_NONE_MAPPED: error = EINVAL; break;
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case ERROR_NOT_ENOUGH_MEMORY: error = ENOMEM; break;
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case ERROR_NOT_READY: error = EAGAIN; break;
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case ERROR_NOT_SAME_DEVICE: error = EXDEV; break;
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case ERROR_NO_DATA: error = EPIPE; break;
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case ERROR_NO_MORE_SEARCH_HANDLES: error = EIO; break;
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case ERROR_NO_PROC_SLOTS: error = EAGAIN; break;
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case ERROR_NO_SUCH_PRIVILEGE: error = EACCES; break;
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case ERROR_OPEN_FAILED: error = EIO; break;
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case ERROR_OPEN_FILES: error = EBUSY; break;
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case ERROR_OPERATION_ABORTED: error = EINTR; break;
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case ERROR_OUTOFMEMORY: error = ENOMEM; break;
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case ERROR_PASSWORD_EXPIRED: error = EACCES; break;
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case ERROR_PATH_BUSY: error = EBUSY; break;
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case ERROR_PATH_NOT_FOUND: error = ENOENT; break;
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case ERROR_PIPE_BUSY: error = EBUSY; break;
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case ERROR_PIPE_CONNECTED: error = EPIPE; break;
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case ERROR_PIPE_LISTENING: error = EPIPE; break;
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case ERROR_PIPE_NOT_CONNECTED: error = EPIPE; break;
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case ERROR_PRIVILEGE_NOT_HELD: error = EACCES; break;
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case ERROR_READ_FAULT: error = EIO; break;
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case ERROR_SEEK: error = EIO; break;
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case ERROR_SEEK_ON_DEVICE: error = ESPIPE; break;
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case ERROR_SHARING_BUFFER_EXCEEDED: error = ENFILE; break;
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case ERROR_SHARING_VIOLATION: error = EACCES; break;
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case ERROR_STACK_OVERFLOW: error = ENOMEM; break;
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case ERROR_SWAPERROR: error = ENOENT; break;
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case ERROR_TOO_MANY_MODULES: error = EMFILE; break;
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case ERROR_TOO_MANY_OPEN_FILES: error = EMFILE; break;
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case ERROR_UNRECOGNIZED_MEDIA: error = ENXIO; break;
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case ERROR_UNRECOGNIZED_VOLUME: error = ENODEV; break;
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case ERROR_WAIT_NO_CHILDREN: error = ECHILD; break;
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case ERROR_WRITE_FAULT: error = EIO; break;
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case ERROR_WRITE_PROTECT: error = EROFS; break;
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}
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return error;
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}
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static inline int is_file_in_use_error(DWORD errcode)
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{
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switch (errcode) {
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case ERROR_SHARING_VIOLATION:
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case ERROR_ACCESS_DENIED:
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return 1;
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}
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return 0;
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}
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static int read_yes_no_answer(void)
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{
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char answer[1024];
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if (fgets(answer, sizeof(answer), stdin)) {
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size_t answer_len = strlen(answer);
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int got_full_line = 0, c;
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/* remove the newline */
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if (answer_len >= 2 && answer[answer_len-2] == '\r') {
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answer[answer_len-2] = '\0';
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got_full_line = 1;
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} else if (answer_len >= 1 && answer[answer_len-1] == '\n') {
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answer[answer_len-1] = '\0';
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got_full_line = 1;
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}
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/* flush the buffer in case we did not get the full line */
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if (!got_full_line)
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while ((c = getchar()) != EOF && c != '\n')
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;
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} else
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/* we could not read, return the
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* default answer which is no */
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return 0;
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if (tolower(answer[0]) == 'y' && !answer[1])
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return 1;
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if (!strncasecmp(answer, "yes", sizeof(answer)))
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return 1;
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if (tolower(answer[0]) == 'n' && !answer[1])
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return 0;
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if (!strncasecmp(answer, "no", sizeof(answer)))
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return 0;
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/* did not find an answer we understand */
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return -1;
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}
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static int ask_yes_no_if_possible(const char *format, ...)
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{
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char question[4096];
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const char *retry_hook[] = { NULL, NULL, NULL };
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va_list args;
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va_start(args, format);
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vsnprintf(question, sizeof(question), format, args);
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va_end(args);
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if ((retry_hook[0] = mingw_getenv("GIT_ASK_YESNO"))) {
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retry_hook[1] = question;
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return !run_command_v_opt(retry_hook, 0);
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}
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if (!isatty(_fileno(stdin)) || !isatty(_fileno(stderr)))
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return 0;
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while (1) {
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int answer;
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fprintf(stderr, "%s (y/n) ", question);
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if ((answer = read_yes_no_answer()) >= 0)
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return answer;
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fprintf(stderr, "Sorry, I did not understand your answer. "
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"Please type 'y' or 'n'\n");
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}
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}
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#undef unlink
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int mingw_unlink(const char *pathname)
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{
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int ret, tries = 0;
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/* read-only files cannot be removed */
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chmod(pathname, 0666);
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while ((ret = unlink(pathname)) == -1 && tries < ARRAY_SIZE(delay)) {
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if (!is_file_in_use_error(GetLastError()))
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break;
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/*
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* We assume that some other process had the source or
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* destination file open at the wrong moment and retry.
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* In order to give the other process a higher chance to
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* complete its operation, we give up our time slice now.
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* If we have to retry again, we do sleep a bit.
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*/
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Sleep(delay[tries]);
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tries++;
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}
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while (ret == -1 && is_file_in_use_error(GetLastError()) &&
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ask_yes_no_if_possible("Unlink of file '%s' failed. "
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"Should I try again?", pathname))
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ret = unlink(pathname);
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return ret;
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}
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static int is_dir_empty(const char *path)
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{
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struct strbuf buf = STRBUF_INIT;
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WIN32_FIND_DATAA findbuf;
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HANDLE handle;
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strbuf_addf(&buf, "%s\\*", path);
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handle = FindFirstFileA(buf.buf, &findbuf);
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if (handle == INVALID_HANDLE_VALUE) {
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strbuf_release(&buf);
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return GetLastError() == ERROR_NO_MORE_FILES;
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}
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while (!strcmp(findbuf.cFileName, ".") ||
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!strcmp(findbuf.cFileName, ".."))
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if (!FindNextFile(handle, &findbuf)) {
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strbuf_release(&buf);
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return GetLastError() == ERROR_NO_MORE_FILES;
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}
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FindClose(handle);
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strbuf_release(&buf);
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return 0;
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}
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#undef rmdir
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int mingw_rmdir(const char *pathname)
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{
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int ret, tries = 0;
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while ((ret = rmdir(pathname)) == -1 && tries < ARRAY_SIZE(delay)) {
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if (!is_file_in_use_error(GetLastError()))
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break;
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if (!is_dir_empty(pathname)) {
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errno = ENOTEMPTY;
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break;
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}
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/*
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* We assume that some other process had the source or
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* destination file open at the wrong moment and retry.
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* In order to give the other process a higher chance to
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* complete its operation, we give up our time slice now.
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* If we have to retry again, we do sleep a bit.
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*/
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Sleep(delay[tries]);
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tries++;
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}
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while (ret == -1 && is_file_in_use_error(GetLastError()) &&
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ask_yes_no_if_possible("Deletion of directory '%s' failed. "
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"Should I try again?", pathname))
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ret = rmdir(pathname);
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return ret;
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}
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#undef open
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int mingw_open (const char *filename, int oflags, ...)
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{
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va_list args;
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unsigned mode;
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int fd;
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va_start(args, oflags);
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mode = va_arg(args, int);
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va_end(args);
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if (filename && !strcmp(filename, "/dev/null"))
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filename = "nul";
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fd = open(filename, oflags, mode);
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if (fd < 0 && (oflags & O_CREAT) && errno == EACCES) {
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DWORD attrs = GetFileAttributes(filename);
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if (attrs != INVALID_FILE_ATTRIBUTES && (attrs & FILE_ATTRIBUTE_DIRECTORY))
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errno = EISDIR;
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}
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return fd;
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}
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#undef write
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ssize_t mingw_write(int fd, const void *buf, size_t count)
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{
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/*
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* While write() calls to a file on a local disk are translated
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* into WriteFile() calls with a maximum size of 64KB on Windows
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* XP and 256KB on Vista, no such cap is placed on writes to
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* files over the network on Windows XP. Unfortunately, there
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* seems to be a limit of 32MB-28KB on X64 and 64MB-32KB on x86;
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* bigger writes fail on Windows XP.
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* So we cap to a nice 31MB here to avoid write failures over
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* the net without changing the number of WriteFile() calls in
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* the local case.
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*/
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return write(fd, buf, min(count, 31 * 1024 * 1024));
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}
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#undef fopen
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FILE *mingw_fopen (const char *filename, const char *otype)
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{
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if (filename && !strcmp(filename, "/dev/null"))
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filename = "nul";
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return fopen(filename, otype);
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}
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#undef freopen
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FILE *mingw_freopen (const char *filename, const char *otype, FILE *stream)
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{
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if (filename && !strcmp(filename, "/dev/null"))
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filename = "nul";
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return freopen(filename, otype, stream);
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}
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/*
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* The unit of FILETIME is 100-nanoseconds since January 1, 1601, UTC.
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* Returns the 100-nanoseconds ("hekto nanoseconds") since the epoch.
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*/
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static inline long long filetime_to_hnsec(const FILETIME *ft)
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{
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long long winTime = ((long long)ft->dwHighDateTime << 32) + ft->dwLowDateTime;
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/* Windows to Unix Epoch conversion */
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return winTime - 116444736000000000LL;
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}
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static inline time_t filetime_to_time_t(const FILETIME *ft)
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{
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return (time_t)(filetime_to_hnsec(ft) / 10000000);
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}
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/* We keep the do_lstat code in a separate function to avoid recursion.
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* When a path ends with a slash, the stat will fail with ENOENT. In
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* this case, we strip the trailing slashes and stat again.
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*
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* If follow is true then act like stat() and report on the link
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* target. Otherwise report on the link itself.
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*/
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static int do_lstat(int follow, const char *file_name, struct stat *buf)
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{
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int err;
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WIN32_FILE_ATTRIBUTE_DATA fdata;
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if (!(err = get_file_attr(file_name, &fdata))) {
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buf->st_ino = 0;
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buf->st_gid = 0;
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buf->st_uid = 0;
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buf->st_nlink = 1;
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buf->st_mode = file_attr_to_st_mode(fdata.dwFileAttributes);
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buf->st_size = fdata.nFileSizeLow |
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(((off_t)fdata.nFileSizeHigh)<<32);
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buf->st_dev = buf->st_rdev = 0; /* not used by Git */
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buf->st_atime = filetime_to_time_t(&(fdata.ftLastAccessTime));
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buf->st_mtime = filetime_to_time_t(&(fdata.ftLastWriteTime));
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buf->st_ctime = filetime_to_time_t(&(fdata.ftCreationTime));
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if (fdata.dwFileAttributes & FILE_ATTRIBUTE_REPARSE_POINT) {
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WIN32_FIND_DATAA findbuf;
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HANDLE handle = FindFirstFileA(file_name, &findbuf);
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if (handle != INVALID_HANDLE_VALUE) {
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if ((findbuf.dwFileAttributes & FILE_ATTRIBUTE_REPARSE_POINT) &&
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(findbuf.dwReserved0 == IO_REPARSE_TAG_SYMLINK)) {
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if (follow) {
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char buffer[MAXIMUM_REPARSE_DATA_BUFFER_SIZE];
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buf->st_size = readlink(file_name, buffer, MAXIMUM_REPARSE_DATA_BUFFER_SIZE);
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} else {
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buf->st_mode = S_IFLNK;
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}
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buf->st_mode |= S_IREAD;
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if (!(findbuf.dwFileAttributes & FILE_ATTRIBUTE_READONLY))
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buf->st_mode |= S_IWRITE;
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}
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FindClose(handle);
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}
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}
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return 0;
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}
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errno = err;
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return -1;
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}
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/* We provide our own lstat/fstat functions, since the provided
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* lstat/fstat functions are so slow. These stat functions are
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* tailored for Git's usage (read: fast), and are not meant to be
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* complete. Note that Git stat()s are redirected to mingw_lstat()
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* too, since Windows doesn't really handle symlinks that well.
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*/
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static int do_stat_internal(int follow, const char *file_name, struct stat *buf)
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{
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int namelen;
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static char alt_name[PATH_MAX];
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if (!do_lstat(follow, file_name, buf))
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return 0;
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/* if file_name ended in a '/', Windows returned ENOENT;
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* try again without trailing slashes
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*/
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if (errno != ENOENT)
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return -1;
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namelen = strlen(file_name);
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if (namelen && file_name[namelen-1] != '/')
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return -1;
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while (namelen && file_name[namelen-1] == '/')
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--namelen;
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if (!namelen || namelen >= PATH_MAX)
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return -1;
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memcpy(alt_name, file_name, namelen);
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alt_name[namelen] = 0;
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return do_lstat(follow, alt_name, buf);
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}
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int mingw_lstat(const char *file_name, struct stat *buf)
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{
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return do_stat_internal(0, file_name, buf);
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}
|
|
int mingw_stat(const char *file_name, struct stat *buf)
|
|
{
|
|
return do_stat_internal(1, file_name, buf);
|
|
}
|
|
|
|
#undef fstat
|
|
int mingw_fstat(int fd, struct stat *buf)
|
|
{
|
|
HANDLE fh = (HANDLE)_get_osfhandle(fd);
|
|
BY_HANDLE_FILE_INFORMATION fdata;
|
|
|
|
if (fh == INVALID_HANDLE_VALUE) {
|
|
errno = EBADF;
|
|
return -1;
|
|
}
|
|
/* direct non-file handles to MS's fstat() */
|
|
if (GetFileType(fh) != FILE_TYPE_DISK)
|
|
return _fstati64(fd, buf);
|
|
|
|
if (GetFileInformationByHandle(fh, &fdata)) {
|
|
buf->st_ino = 0;
|
|
buf->st_gid = 0;
|
|
buf->st_uid = 0;
|
|
buf->st_nlink = 1;
|
|
buf->st_mode = file_attr_to_st_mode(fdata.dwFileAttributes);
|
|
buf->st_size = fdata.nFileSizeLow |
|
|
(((off_t)fdata.nFileSizeHigh)<<32);
|
|
buf->st_dev = buf->st_rdev = 0; /* not used by Git */
|
|
buf->st_atime = filetime_to_time_t(&(fdata.ftLastAccessTime));
|
|
buf->st_mtime = filetime_to_time_t(&(fdata.ftLastWriteTime));
|
|
buf->st_ctime = filetime_to_time_t(&(fdata.ftCreationTime));
|
|
return 0;
|
|
}
|
|
errno = EBADF;
|
|
return -1;
|
|
}
|
|
|
|
static inline void time_t_to_filetime(time_t t, FILETIME *ft)
|
|
{
|
|
long long winTime = t * 10000000LL + 116444736000000000LL;
|
|
ft->dwLowDateTime = winTime;
|
|
ft->dwHighDateTime = winTime >> 32;
|
|
}
|
|
|
|
int mingw_utime (const char *file_name, const struct utimbuf *times)
|
|
{
|
|
FILETIME mft, aft;
|
|
int fh, rc;
|
|
|
|
/* must have write permission */
|
|
DWORD attrs = GetFileAttributes(file_name);
|
|
if (attrs != INVALID_FILE_ATTRIBUTES &&
|
|
(attrs & FILE_ATTRIBUTE_READONLY)) {
|
|
/* ignore errors here; open() will report them */
|
|
SetFileAttributes(file_name, attrs & ~FILE_ATTRIBUTE_READONLY);
|
|
}
|
|
|
|
if ((fh = open(file_name, O_RDWR | O_BINARY)) < 0) {
|
|
rc = -1;
|
|
goto revert_attrs;
|
|
}
|
|
|
|
if (times) {
|
|
time_t_to_filetime(times->modtime, &mft);
|
|
time_t_to_filetime(times->actime, &aft);
|
|
} else {
|
|
GetSystemTimeAsFileTime(&mft);
|
|
aft = mft;
|
|
}
|
|
if (!SetFileTime((HANDLE)_get_osfhandle(fh), NULL, &aft, &mft)) {
|
|
errno = EINVAL;
|
|
rc = -1;
|
|
} else
|
|
rc = 0;
|
|
close(fh);
|
|
|
|
revert_attrs:
|
|
if (attrs != INVALID_FILE_ATTRIBUTES &&
|
|
(attrs & FILE_ATTRIBUTE_READONLY)) {
|
|
/* ignore errors again */
|
|
SetFileAttributes(file_name, attrs);
|
|
}
|
|
return rc;
|
|
}
|
|
|
|
unsigned int sleep (unsigned int seconds)
|
|
{
|
|
Sleep(seconds*1000);
|
|
return 0;
|
|
}
|
|
|
|
int mkstemp(char *template)
|
|
{
|
|
char *filename = mktemp(template);
|
|
if (filename == NULL)
|
|
return -1;
|
|
return open(filename, O_RDWR | O_CREAT, 0600);
|
|
}
|
|
|
|
int gettimeofday(struct timeval *tv, void *tz)
|
|
{
|
|
FILETIME ft;
|
|
long long hnsec;
|
|
|
|
GetSystemTimeAsFileTime(&ft);
|
|
hnsec = filetime_to_hnsec(&ft);
|
|
tv->tv_sec = hnsec / 10000000;
|
|
tv->tv_usec = (hnsec % 10000000) / 10;
|
|
return 0;
|
|
}
|
|
|
|
int pipe(int filedes[2])
|
|
{
|
|
HANDLE h[2];
|
|
|
|
/* this creates non-inheritable handles */
|
|
if (!CreatePipe(&h[0], &h[1], NULL, 8192)) {
|
|
errno = err_win_to_posix(GetLastError());
|
|
return -1;
|
|
}
|
|
filedes[0] = _open_osfhandle((int)h[0], O_NOINHERIT);
|
|
if (filedes[0] < 0) {
|
|
CloseHandle(h[0]);
|
|
CloseHandle(h[1]);
|
|
return -1;
|
|
}
|
|
filedes[1] = _open_osfhandle((int)h[1], O_NOINHERIT);
|
|
if (filedes[0] < 0) {
|
|
close(filedes[0]);
|
|
CloseHandle(h[1]);
|
|
return -1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
struct tm *gmtime_r(const time_t *timep, struct tm *result)
|
|
{
|
|
/* gmtime() in MSVCRT.DLL is thread-safe, but not reentrant */
|
|
memcpy(result, gmtime(timep), sizeof(struct tm));
|
|
return result;
|
|
}
|
|
|
|
struct tm *localtime_r(const time_t *timep, struct tm *result)
|
|
{
|
|
/* localtime() in MSVCRT.DLL is thread-safe, but not reentrant */
|
|
memcpy(result, localtime(timep), sizeof(struct tm));
|
|
return result;
|
|
}
|
|
|
|
#undef getcwd
|
|
char *mingw_getcwd(char *pointer, int len)
|
|
{
|
|
int i;
|
|
char *ret = getcwd(pointer, len);
|
|
if (!ret)
|
|
return ret;
|
|
for (i = 0; pointer[i]; i++)
|
|
if (pointer[i] == '\\')
|
|
pointer[i] = '/';
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* See http://msdn2.microsoft.com/en-us/library/17w5ykft(vs.71).aspx
|
|
* (Parsing C++ Command-Line Arguments)
|
|
*/
|
|
static const char *quote_arg(const char *arg)
|
|
{
|
|
/* count chars to quote */
|
|
int len = 0, n = 0;
|
|
int force_quotes = 0;
|
|
char *q, *d;
|
|
const char *p = arg;
|
|
if (!*p) force_quotes = 1;
|
|
while (*p) {
|
|
if (isspace(*p) || *p == '*' || *p == '?' || *p == '{' || *p == '\'')
|
|
force_quotes = 1;
|
|
else if (*p == '"')
|
|
n++;
|
|
else if (*p == '\\') {
|
|
int count = 0;
|
|
while (*p == '\\') {
|
|
count++;
|
|
p++;
|
|
len++;
|
|
}
|
|
if (*p == '"')
|
|
n += count*2 + 1;
|
|
continue;
|
|
}
|
|
len++;
|
|
p++;
|
|
}
|
|
if (!force_quotes && n == 0)
|
|
return arg;
|
|
|
|
/* insert \ where necessary */
|
|
d = q = xmalloc(len+n+3);
|
|
*d++ = '"';
|
|
while (*arg) {
|
|
if (*arg == '"')
|
|
*d++ = '\\';
|
|
else if (*arg == '\\') {
|
|
int count = 0;
|
|
while (*arg == '\\') {
|
|
count++;
|
|
*d++ = *arg++;
|
|
}
|
|
if (*arg == '"') {
|
|
while (count-- > 0)
|
|
*d++ = '\\';
|
|
*d++ = '\\';
|
|
}
|
|
}
|
|
*d++ = *arg++;
|
|
}
|
|
*d++ = '"';
|
|
*d++ = 0;
|
|
return q;
|
|
}
|
|
|
|
static const char *parse_interpreter(const char *cmd)
|
|
{
|
|
static char buf[100];
|
|
char *p, *opt;
|
|
int n, fd;
|
|
|
|
/* don't even try a .exe */
|
|
n = strlen(cmd);
|
|
if (n >= 4 && !strcasecmp(cmd+n-4, ".exe"))
|
|
return NULL;
|
|
|
|
fd = open(cmd, O_RDONLY);
|
|
if (fd < 0)
|
|
return NULL;
|
|
n = read(fd, buf, sizeof(buf)-1);
|
|
close(fd);
|
|
if (n < 4) /* at least '#!/x' and not error */
|
|
return NULL;
|
|
|
|
if (buf[0] != '#' || buf[1] != '!')
|
|
return NULL;
|
|
buf[n] = '\0';
|
|
p = buf + strcspn(buf, "\r\n");
|
|
if (!*p)
|
|
return NULL;
|
|
|
|
*p = '\0';
|
|
if (!(p = strrchr(buf+2, '/')) && !(p = strrchr(buf+2, '\\')))
|
|
return NULL;
|
|
/* strip options */
|
|
if ((opt = strchr(p+1, ' ')))
|
|
*opt = '\0';
|
|
return p+1;
|
|
}
|
|
|
|
/*
|
|
* Splits the PATH into parts.
|
|
*/
|
|
static char **get_path_split(void)
|
|
{
|
|
char *p, **path, *envpath = mingw_getenv("PATH");
|
|
int i, n = 0;
|
|
|
|
if (!envpath || !*envpath)
|
|
return NULL;
|
|
|
|
envpath = xstrdup(envpath);
|
|
p = envpath;
|
|
while (p) {
|
|
char *dir = p;
|
|
p = strchr(p, ';');
|
|
if (p) *p++ = '\0';
|
|
if (*dir) { /* not earlier, catches series of ; */
|
|
++n;
|
|
}
|
|
}
|
|
if (!n)
|
|
return NULL;
|
|
|
|
path = xmalloc((n+1)*sizeof(char *));
|
|
p = envpath;
|
|
i = 0;
|
|
do {
|
|
if (*p)
|
|
path[i++] = xstrdup(p);
|
|
p = p+strlen(p)+1;
|
|
} while (i < n);
|
|
path[i] = NULL;
|
|
|
|
free(envpath);
|
|
|
|
return path;
|
|
}
|
|
|
|
static void free_path_split(char **path)
|
|
{
|
|
char **p = path;
|
|
|
|
if (!path)
|
|
return;
|
|
|
|
while (*p)
|
|
free(*p++);
|
|
free(path);
|
|
}
|
|
|
|
/*
|
|
* exe_only means that we only want to detect .exe files, but not scripts
|
|
* (which do not have an extension)
|
|
*/
|
|
static char *lookup_prog(const char *dir, const char *cmd, int isexe, int exe_only)
|
|
{
|
|
char path[MAX_PATH];
|
|
snprintf(path, sizeof(path), "%s/%s.exe", dir, cmd);
|
|
|
|
if (!isexe && access(path, F_OK) == 0)
|
|
return xstrdup(path);
|
|
path[strlen(path)-4] = '\0';
|
|
if ((!exe_only || isexe) && access(path, F_OK) == 0)
|
|
if (!(GetFileAttributes(path) & FILE_ATTRIBUTE_DIRECTORY))
|
|
return xstrdup(path);
|
|
return NULL;
|
|
}
|
|
|
|
/*
|
|
* Determines the absolute path of cmd using the split path in path.
|
|
* If cmd contains a slash or backslash, no lookup is performed.
|
|
*/
|
|
static char *path_lookup(const char *cmd, char **path, int exe_only)
|
|
{
|
|
char *prog = NULL;
|
|
int len = strlen(cmd);
|
|
int isexe = len >= 4 && !strcasecmp(cmd+len-4, ".exe");
|
|
|
|
if (strchr(cmd, '/') || strchr(cmd, '\\'))
|
|
prog = xstrdup(cmd);
|
|
|
|
while (!prog && *path)
|
|
prog = lookup_prog(*path++, cmd, isexe, exe_only);
|
|
|
|
return prog;
|
|
}
|
|
|
|
static int env_compare(const void *a, const void *b)
|
|
{
|
|
char *const *ea = a;
|
|
char *const *eb = b;
|
|
return strcasecmp(*ea, *eb);
|
|
}
|
|
|
|
struct pinfo_t {
|
|
struct pinfo_t *next;
|
|
pid_t pid;
|
|
HANDLE proc;
|
|
} pinfo_t;
|
|
struct pinfo_t *pinfo = NULL;
|
|
CRITICAL_SECTION pinfo_cs;
|
|
|
|
static pid_t mingw_spawnve_fd(const char *cmd, const char **argv, char **env,
|
|
const char *dir,
|
|
int prepend_cmd, int fhin, int fhout, int fherr)
|
|
{
|
|
STARTUPINFO si;
|
|
PROCESS_INFORMATION pi;
|
|
struct strbuf envblk, args;
|
|
unsigned flags;
|
|
BOOL ret;
|
|
|
|
/* Determine whether or not we are associated to a console */
|
|
HANDLE cons = CreateFile("CONOUT$", GENERIC_WRITE,
|
|
FILE_SHARE_WRITE, NULL, OPEN_EXISTING,
|
|
FILE_ATTRIBUTE_NORMAL, NULL);
|
|
if (cons == INVALID_HANDLE_VALUE) {
|
|
/* There is no console associated with this process.
|
|
* Since the child is a console process, Windows
|
|
* would normally create a console window. But
|
|
* since we'll be redirecting std streams, we do
|
|
* not need the console.
|
|
* It is necessary to use DETACHED_PROCESS
|
|
* instead of CREATE_NO_WINDOW to make ssh
|
|
* recognize that it has no console.
|
|
*/
|
|
flags = DETACHED_PROCESS;
|
|
} else {
|
|
/* There is already a console. If we specified
|
|
* DETACHED_PROCESS here, too, Windows would
|
|
* disassociate the child from the console.
|
|
* The same is true for CREATE_NO_WINDOW.
|
|
* Go figure!
|
|
*/
|
|
flags = 0;
|
|
CloseHandle(cons);
|
|
}
|
|
memset(&si, 0, sizeof(si));
|
|
si.cb = sizeof(si);
|
|
si.dwFlags = STARTF_USESTDHANDLES;
|
|
si.hStdInput = (HANDLE) _get_osfhandle(fhin);
|
|
si.hStdOutput = (HANDLE) _get_osfhandle(fhout);
|
|
si.hStdError = (HANDLE) _get_osfhandle(fherr);
|
|
|
|
/* concatenate argv, quoting args as we go */
|
|
strbuf_init(&args, 0);
|
|
if (prepend_cmd) {
|
|
char *quoted = (char *)quote_arg(cmd);
|
|
strbuf_addstr(&args, quoted);
|
|
if (quoted != cmd)
|
|
free(quoted);
|
|
}
|
|
for (; *argv; argv++) {
|
|
char *quoted = (char *)quote_arg(*argv);
|
|
if (*args.buf)
|
|
strbuf_addch(&args, ' ');
|
|
strbuf_addstr(&args, quoted);
|
|
if (quoted != *argv)
|
|
free(quoted);
|
|
}
|
|
|
|
if (env) {
|
|
int count = 0;
|
|
char **e, **sorted_env;
|
|
|
|
for (e = env; *e; e++)
|
|
count++;
|
|
|
|
/* environment must be sorted */
|
|
sorted_env = xmalloc(sizeof(*sorted_env) * (count + 1));
|
|
memcpy(sorted_env, env, sizeof(*sorted_env) * (count + 1));
|
|
qsort(sorted_env, count, sizeof(*sorted_env), env_compare);
|
|
|
|
strbuf_init(&envblk, 0);
|
|
for (e = sorted_env; *e; e++) {
|
|
strbuf_addstr(&envblk, *e);
|
|
strbuf_addch(&envblk, '\0');
|
|
}
|
|
free(sorted_env);
|
|
}
|
|
|
|
memset(&pi, 0, sizeof(pi));
|
|
ret = CreateProcess(cmd, args.buf, NULL, NULL, TRUE, flags,
|
|
env ? envblk.buf : NULL, dir, &si, &pi);
|
|
|
|
if (env)
|
|
strbuf_release(&envblk);
|
|
strbuf_release(&args);
|
|
|
|
if (!ret) {
|
|
errno = ENOENT;
|
|
return -1;
|
|
}
|
|
CloseHandle(pi.hThread);
|
|
|
|
/*
|
|
* The process ID is the human-readable identifier of the process
|
|
* that we want to present in log and error messages. The handle
|
|
* is not useful for this purpose. But we cannot close it, either,
|
|
* because it is not possible to turn a process ID into a process
|
|
* handle after the process terminated.
|
|
* Keep the handle in a list for waitpid.
|
|
*/
|
|
EnterCriticalSection(&pinfo_cs);
|
|
{
|
|
struct pinfo_t *info = xmalloc(sizeof(struct pinfo_t));
|
|
info->pid = pi.dwProcessId;
|
|
info->proc = pi.hProcess;
|
|
info->next = pinfo;
|
|
pinfo = info;
|
|
}
|
|
LeaveCriticalSection(&pinfo_cs);
|
|
|
|
return (pid_t)pi.dwProcessId;
|
|
}
|
|
|
|
static pid_t mingw_spawnve(const char *cmd, const char **argv, char **env,
|
|
int prepend_cmd)
|
|
{
|
|
return mingw_spawnve_fd(cmd, argv, env, NULL, prepend_cmd, 0, 1, 2);
|
|
}
|
|
|
|
pid_t mingw_spawnvpe(const char *cmd, const char **argv, char **env,
|
|
const char *dir,
|
|
int fhin, int fhout, int fherr)
|
|
{
|
|
pid_t pid;
|
|
char **path = get_path_split();
|
|
char *prog = path_lookup(cmd, path, 0);
|
|
|
|
if (!prog) {
|
|
errno = ENOENT;
|
|
pid = -1;
|
|
}
|
|
else {
|
|
const char *interpr = parse_interpreter(prog);
|
|
|
|
if (interpr) {
|
|
const char *argv0 = argv[0];
|
|
char *iprog = path_lookup(interpr, path, 1);
|
|
argv[0] = prog;
|
|
if (!iprog) {
|
|
errno = ENOENT;
|
|
pid = -1;
|
|
}
|
|
else {
|
|
pid = mingw_spawnve_fd(iprog, argv, env, dir, 1,
|
|
fhin, fhout, fherr);
|
|
free(iprog);
|
|
}
|
|
argv[0] = argv0;
|
|
}
|
|
else
|
|
pid = mingw_spawnve_fd(prog, argv, env, dir, 0,
|
|
fhin, fhout, fherr);
|
|
free(prog);
|
|
}
|
|
free_path_split(path);
|
|
return pid;
|
|
}
|
|
|
|
static int try_shell_exec(const char *cmd, char *const *argv, char **env)
|
|
{
|
|
const char *interpr = parse_interpreter(cmd);
|
|
char **path;
|
|
char *prog;
|
|
int pid = 0;
|
|
|
|
if (!interpr)
|
|
return 0;
|
|
path = get_path_split();
|
|
prog = path_lookup(interpr, path, 1);
|
|
if (prog) {
|
|
int argc = 0;
|
|
const char **argv2;
|
|
while (argv[argc]) argc++;
|
|
argv2 = xmalloc(sizeof(*argv) * (argc+1));
|
|
argv2[0] = (char *)cmd; /* full path to the script file */
|
|
memcpy(&argv2[1], &argv[1], sizeof(*argv) * argc);
|
|
pid = mingw_spawnve(prog, argv2, env, 1);
|
|
if (pid >= 0) {
|
|
int status;
|
|
if (waitpid(pid, &status, 0) < 0)
|
|
status = 255;
|
|
exit(status);
|
|
}
|
|
pid = 1; /* indicate that we tried but failed */
|
|
free(prog);
|
|
free(argv2);
|
|
}
|
|
free_path_split(path);
|
|
return pid;
|
|
}
|
|
|
|
static void mingw_execve(const char *cmd, char *const *argv, char *const *env)
|
|
{
|
|
/* check if git_command is a shell script */
|
|
if (!try_shell_exec(cmd, argv, (char **)env)) {
|
|
int pid, status;
|
|
|
|
pid = mingw_spawnve(cmd, (const char **)argv, (char **)env, 0);
|
|
if (pid < 0)
|
|
return;
|
|
if (waitpid(pid, &status, 0) < 0)
|
|
status = 255;
|
|
exit(status);
|
|
}
|
|
}
|
|
|
|
int mingw_execvp(const char *cmd, char *const *argv)
|
|
{
|
|
char **path = get_path_split();
|
|
char *prog = path_lookup(cmd, path, 0);
|
|
|
|
if (prog) {
|
|
mingw_execve(prog, argv, environ);
|
|
free(prog);
|
|
} else
|
|
errno = ENOENT;
|
|
|
|
free_path_split(path);
|
|
return -1;
|
|
}
|
|
|
|
int mingw_execv(const char *cmd, char *const *argv)
|
|
{
|
|
mingw_execve(cmd, argv, environ);
|
|
return -1;
|
|
}
|
|
|
|
int mingw_kill(pid_t pid, int sig)
|
|
{
|
|
if (pid > 0 && sig == SIGTERM) {
|
|
HANDLE h = OpenProcess(PROCESS_TERMINATE, FALSE, pid);
|
|
|
|
if (TerminateProcess(h, -1)) {
|
|
CloseHandle(h);
|
|
return 0;
|
|
}
|
|
|
|
errno = err_win_to_posix(GetLastError());
|
|
CloseHandle(h);
|
|
return -1;
|
|
}
|
|
|
|
errno = EINVAL;
|
|
return -1;
|
|
}
|
|
|
|
static char **copy_environ(void)
|
|
{
|
|
char **env;
|
|
int i = 0;
|
|
while (environ[i])
|
|
i++;
|
|
env = xmalloc((i+1)*sizeof(*env));
|
|
for (i = 0; environ[i]; i++)
|
|
env[i] = xstrdup(environ[i]);
|
|
env[i] = NULL;
|
|
return env;
|
|
}
|
|
|
|
void free_environ(char **env)
|
|
{
|
|
int i;
|
|
for (i = 0; env[i]; i++)
|
|
free(env[i]);
|
|
free(env);
|
|
}
|
|
|
|
static int lookup_env(char **env, const char *name, size_t nmln)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; env[i]; i++) {
|
|
if (0 == strncmp(env[i], name, nmln)
|
|
&& '=' == env[i][nmln])
|
|
/* matches */
|
|
return i;
|
|
}
|
|
return -1;
|
|
}
|
|
|
|
/*
|
|
* If name contains '=', then sets the variable, otherwise it unsets it
|
|
*/
|
|
static char **env_setenv(char **env, const char *name)
|
|
{
|
|
char *eq = strchrnul(name, '=');
|
|
int i = lookup_env(env, name, eq-name);
|
|
|
|
if (i < 0) {
|
|
if (*eq) {
|
|
for (i = 0; env[i]; i++)
|
|
;
|
|
env = xrealloc(env, (i+2)*sizeof(*env));
|
|
env[i] = xstrdup(name);
|
|
env[i+1] = NULL;
|
|
}
|
|
}
|
|
else {
|
|
free(env[i]);
|
|
if (*eq)
|
|
env[i] = xstrdup(name);
|
|
else
|
|
for (; env[i]; i++)
|
|
env[i] = env[i+1];
|
|
}
|
|
return env;
|
|
}
|
|
|
|
/*
|
|
* Copies global environ and adjusts variables as specified by vars.
|
|
*/
|
|
char **make_augmented_environ(const char *const *vars)
|
|
{
|
|
char **env = copy_environ();
|
|
|
|
while (*vars)
|
|
env = env_setenv(env, *vars++);
|
|
return env;
|
|
}
|
|
|
|
#undef getenv
|
|
|
|
/*
|
|
* The system's getenv looks up the name in a case-insensitive manner.
|
|
* This version tries a case-sensitive lookup and falls back to
|
|
* case-insensitive if nothing was found. This is necessary because,
|
|
* as a prominent example, CMD sets 'Path', but not 'PATH'.
|
|
* Warning: not thread-safe.
|
|
*/
|
|
static char *getenv_cs(const char *name)
|
|
{
|
|
size_t len = strlen(name);
|
|
int i = lookup_env(environ, name, len);
|
|
if (i >= 0)
|
|
return environ[i] + len + 1; /* skip past name and '=' */
|
|
return getenv(name);
|
|
}
|
|
|
|
char *mingw_getenv(const char *name)
|
|
{
|
|
char *result = getenv_cs(name);
|
|
if (!result && !strcmp(name, "TMPDIR")) {
|
|
/* on Windows it is TMP and TEMP */
|
|
result = getenv_cs("TMP");
|
|
if (!result)
|
|
result = getenv_cs("TEMP");
|
|
}
|
|
return result;
|
|
}
|
|
|
|
/*
|
|
* Note, this isn't a complete replacement for getaddrinfo. It assumes
|
|
* that service contains a numerical port, or that it is null. It
|
|
* does a simple search using gethostbyname, and returns one IPv4 host
|
|
* if one was found.
|
|
*/
|
|
static int WSAAPI getaddrinfo_stub(const char *node, const char *service,
|
|
const struct addrinfo *hints,
|
|
struct addrinfo **res)
|
|
{
|
|
struct hostent *h = NULL;
|
|
struct addrinfo *ai;
|
|
struct sockaddr_in *sin;
|
|
|
|
if (node) {
|
|
h = gethostbyname(node);
|
|
if (!h)
|
|
return WSAGetLastError();
|
|
}
|
|
|
|
ai = xmalloc(sizeof(struct addrinfo));
|
|
*res = ai;
|
|
ai->ai_flags = 0;
|
|
ai->ai_family = AF_INET;
|
|
ai->ai_socktype = hints ? hints->ai_socktype : 0;
|
|
switch (ai->ai_socktype) {
|
|
case SOCK_STREAM:
|
|
ai->ai_protocol = IPPROTO_TCP;
|
|
break;
|
|
case SOCK_DGRAM:
|
|
ai->ai_protocol = IPPROTO_UDP;
|
|
break;
|
|
default:
|
|
ai->ai_protocol = 0;
|
|
break;
|
|
}
|
|
ai->ai_addrlen = sizeof(struct sockaddr_in);
|
|
if (hints && (hints->ai_flags & AI_CANONNAME))
|
|
ai->ai_canonname = h ? xstrdup(h->h_name) : NULL;
|
|
else
|
|
ai->ai_canonname = NULL;
|
|
|
|
sin = xmalloc(ai->ai_addrlen);
|
|
memset(sin, 0, ai->ai_addrlen);
|
|
sin->sin_family = AF_INET;
|
|
/* Note: getaddrinfo is supposed to allow service to be a string,
|
|
* which should be looked up using getservbyname. This is
|
|
* currently not implemented */
|
|
if (service)
|
|
sin->sin_port = htons(atoi(service));
|
|
if (h)
|
|
sin->sin_addr = *(struct in_addr *)h->h_addr;
|
|
else if (hints && (hints->ai_flags & AI_PASSIVE))
|
|
sin->sin_addr.s_addr = INADDR_ANY;
|
|
else
|
|
sin->sin_addr.s_addr = INADDR_LOOPBACK;
|
|
ai->ai_addr = (struct sockaddr *)sin;
|
|
ai->ai_next = 0;
|
|
return 0;
|
|
}
|
|
|
|
static void WSAAPI freeaddrinfo_stub(struct addrinfo *res)
|
|
{
|
|
free(res->ai_canonname);
|
|
free(res->ai_addr);
|
|
free(res);
|
|
}
|
|
|
|
static int WSAAPI getnameinfo_stub(const struct sockaddr *sa, socklen_t salen,
|
|
char *host, DWORD hostlen,
|
|
char *serv, DWORD servlen, int flags)
|
|
{
|
|
const struct sockaddr_in *sin = (const struct sockaddr_in *)sa;
|
|
if (sa->sa_family != AF_INET)
|
|
return EAI_FAMILY;
|
|
if (!host && !serv)
|
|
return EAI_NONAME;
|
|
|
|
if (host && hostlen > 0) {
|
|
struct hostent *ent = NULL;
|
|
if (!(flags & NI_NUMERICHOST))
|
|
ent = gethostbyaddr((const char *)&sin->sin_addr,
|
|
sizeof(sin->sin_addr), AF_INET);
|
|
|
|
if (ent)
|
|
snprintf(host, hostlen, "%s", ent->h_name);
|
|
else if (flags & NI_NAMEREQD)
|
|
return EAI_NONAME;
|
|
else
|
|
snprintf(host, hostlen, "%s", inet_ntoa(sin->sin_addr));
|
|
}
|
|
|
|
if (serv && servlen > 0) {
|
|
struct servent *ent = NULL;
|
|
if (!(flags & NI_NUMERICSERV))
|
|
ent = getservbyport(sin->sin_port,
|
|
flags & NI_DGRAM ? "udp" : "tcp");
|
|
|
|
if (ent)
|
|
snprintf(serv, servlen, "%s", ent->s_name);
|
|
else
|
|
snprintf(serv, servlen, "%d", ntohs(sin->sin_port));
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static HMODULE ipv6_dll = NULL;
|
|
static void (WSAAPI *ipv6_freeaddrinfo)(struct addrinfo *res);
|
|
static int (WSAAPI *ipv6_getaddrinfo)(const char *node, const char *service,
|
|
const struct addrinfo *hints,
|
|
struct addrinfo **res);
|
|
static int (WSAAPI *ipv6_getnameinfo)(const struct sockaddr *sa, socklen_t salen,
|
|
char *host, DWORD hostlen,
|
|
char *serv, DWORD servlen, int flags);
|
|
/*
|
|
* gai_strerror is an inline function in the ws2tcpip.h header, so we
|
|
* don't need to try to load that one dynamically.
|
|
*/
|
|
|
|
static void socket_cleanup(void)
|
|
{
|
|
WSACleanup();
|
|
if (ipv6_dll)
|
|
FreeLibrary(ipv6_dll);
|
|
ipv6_dll = NULL;
|
|
ipv6_freeaddrinfo = freeaddrinfo_stub;
|
|
ipv6_getaddrinfo = getaddrinfo_stub;
|
|
ipv6_getnameinfo = getnameinfo_stub;
|
|
}
|
|
|
|
static void ensure_socket_initialization(void)
|
|
{
|
|
WSADATA wsa;
|
|
static int initialized = 0;
|
|
const char *libraries[] = { "ws2_32.dll", "wship6.dll", NULL };
|
|
const char **name;
|
|
|
|
if (initialized)
|
|
return;
|
|
|
|
if (WSAStartup(MAKEWORD(2,2), &wsa))
|
|
die("unable to initialize winsock subsystem, error %d",
|
|
WSAGetLastError());
|
|
|
|
for (name = libraries; *name; name++) {
|
|
ipv6_dll = LoadLibrary(*name);
|
|
if (!ipv6_dll)
|
|
continue;
|
|
|
|
ipv6_freeaddrinfo = (void (WSAAPI *)(struct addrinfo *))
|
|
GetProcAddress(ipv6_dll, "freeaddrinfo");
|
|
ipv6_getaddrinfo = (int (WSAAPI *)(const char *, const char *,
|
|
const struct addrinfo *,
|
|
struct addrinfo **))
|
|
GetProcAddress(ipv6_dll, "getaddrinfo");
|
|
ipv6_getnameinfo = (int (WSAAPI *)(const struct sockaddr *,
|
|
socklen_t, char *, DWORD,
|
|
char *, DWORD, int))
|
|
GetProcAddress(ipv6_dll, "getnameinfo");
|
|
if (!ipv6_freeaddrinfo || !ipv6_getaddrinfo || !ipv6_getnameinfo) {
|
|
FreeLibrary(ipv6_dll);
|
|
ipv6_dll = NULL;
|
|
} else
|
|
break;
|
|
}
|
|
if (!ipv6_freeaddrinfo || !ipv6_getaddrinfo || !ipv6_getnameinfo) {
|
|
ipv6_freeaddrinfo = freeaddrinfo_stub;
|
|
ipv6_getaddrinfo = getaddrinfo_stub;
|
|
ipv6_getnameinfo = getnameinfo_stub;
|
|
}
|
|
|
|
atexit(socket_cleanup);
|
|
initialized = 1;
|
|
}
|
|
|
|
#undef gethostname
|
|
int mingw_gethostname(char *name, int namelen)
|
|
{
|
|
ensure_socket_initialization();
|
|
return gethostname(name, namelen);
|
|
}
|
|
|
|
#undef gethostbyname
|
|
struct hostent *mingw_gethostbyname(const char *host)
|
|
{
|
|
ensure_socket_initialization();
|
|
return gethostbyname(host);
|
|
}
|
|
|
|
void mingw_freeaddrinfo(struct addrinfo *res)
|
|
{
|
|
ipv6_freeaddrinfo(res);
|
|
}
|
|
|
|
int mingw_getaddrinfo(const char *node, const char *service,
|
|
const struct addrinfo *hints, struct addrinfo **res)
|
|
{
|
|
ensure_socket_initialization();
|
|
return ipv6_getaddrinfo(node, service, hints, res);
|
|
}
|
|
|
|
int mingw_getnameinfo(const struct sockaddr *sa, socklen_t salen,
|
|
char *host, DWORD hostlen, char *serv, DWORD servlen,
|
|
int flags)
|
|
{
|
|
ensure_socket_initialization();
|
|
return ipv6_getnameinfo(sa, salen, host, hostlen, serv, servlen, flags);
|
|
}
|
|
|
|
int mingw_socket(int domain, int type, int protocol)
|
|
{
|
|
int sockfd;
|
|
SOCKET s;
|
|
|
|
ensure_socket_initialization();
|
|
s = WSASocket(domain, type, protocol, NULL, 0, 0);
|
|
if (s == INVALID_SOCKET) {
|
|
/*
|
|
* WSAGetLastError() values are regular BSD error codes
|
|
* biased by WSABASEERR.
|
|
* However, strerror() does not know about networking
|
|
* specific errors, which are values beginning at 38 or so.
|
|
* Therefore, we choose to leave the biased error code
|
|
* in errno so that _if_ someone looks up the code somewhere,
|
|
* then it is at least the number that are usually listed.
|
|
*/
|
|
errno = WSAGetLastError();
|
|
return -1;
|
|
}
|
|
/* convert into a file descriptor */
|
|
if ((sockfd = _open_osfhandle(s, O_RDWR|O_BINARY)) < 0) {
|
|
closesocket(s);
|
|
return error("unable to make a socket file descriptor: %s",
|
|
strerror(errno));
|
|
}
|
|
return sockfd;
|
|
}
|
|
|
|
#undef connect
|
|
int mingw_connect(int sockfd, struct sockaddr *sa, size_t sz)
|
|
{
|
|
SOCKET s = (SOCKET)_get_osfhandle(sockfd);
|
|
return connect(s, sa, sz);
|
|
}
|
|
|
|
#undef bind
|
|
int mingw_bind(int sockfd, struct sockaddr *sa, size_t sz)
|
|
{
|
|
SOCKET s = (SOCKET)_get_osfhandle(sockfd);
|
|
return bind(s, sa, sz);
|
|
}
|
|
|
|
#undef setsockopt
|
|
int mingw_setsockopt(int sockfd, int lvl, int optname, void *optval, int optlen)
|
|
{
|
|
SOCKET s = (SOCKET)_get_osfhandle(sockfd);
|
|
return setsockopt(s, lvl, optname, (const char*)optval, optlen);
|
|
}
|
|
|
|
#undef shutdown
|
|
int mingw_shutdown(int sockfd, int how)
|
|
{
|
|
SOCKET s = (SOCKET)_get_osfhandle(sockfd);
|
|
return shutdown(s, how);
|
|
}
|
|
|
|
#undef listen
|
|
int mingw_listen(int sockfd, int backlog)
|
|
{
|
|
SOCKET s = (SOCKET)_get_osfhandle(sockfd);
|
|
return listen(s, backlog);
|
|
}
|
|
|
|
#undef accept
|
|
int mingw_accept(int sockfd1, struct sockaddr *sa, socklen_t *sz)
|
|
{
|
|
int sockfd2;
|
|
|
|
SOCKET s1 = (SOCKET)_get_osfhandle(sockfd1);
|
|
SOCKET s2 = accept(s1, sa, sz);
|
|
|
|
/* convert into a file descriptor */
|
|
if ((sockfd2 = _open_osfhandle(s2, O_RDWR|O_BINARY)) < 0) {
|
|
int err = errno;
|
|
closesocket(s2);
|
|
return error("unable to make a socket file descriptor: %s",
|
|
strerror(err));
|
|
}
|
|
return sockfd2;
|
|
}
|
|
|
|
#undef rename
|
|
int mingw_rename(const char *pold, const char *pnew)
|
|
{
|
|
DWORD attrs, gle;
|
|
int tries = 0;
|
|
|
|
/*
|
|
* Try native rename() first to get errno right.
|
|
* It is based on MoveFile(), which cannot overwrite existing files.
|
|
*/
|
|
if (!rename(pold, pnew))
|
|
return 0;
|
|
if (errno != EEXIST)
|
|
return -1;
|
|
repeat:
|
|
if (MoveFileEx(pold, pnew, MOVEFILE_REPLACE_EXISTING))
|
|
return 0;
|
|
/* TODO: translate more errors */
|
|
gle = GetLastError();
|
|
if (gle == ERROR_ACCESS_DENIED &&
|
|
(attrs = GetFileAttributes(pnew)) != INVALID_FILE_ATTRIBUTES) {
|
|
if (attrs & FILE_ATTRIBUTE_DIRECTORY) {
|
|
errno = EISDIR;
|
|
return -1;
|
|
}
|
|
if ((attrs & FILE_ATTRIBUTE_READONLY) &&
|
|
SetFileAttributes(pnew, attrs & ~FILE_ATTRIBUTE_READONLY)) {
|
|
if (MoveFileEx(pold, pnew, MOVEFILE_REPLACE_EXISTING))
|
|
return 0;
|
|
gle = GetLastError();
|
|
/* revert file attributes on failure */
|
|
SetFileAttributes(pnew, attrs);
|
|
}
|
|
}
|
|
if (tries < ARRAY_SIZE(delay) && gle == ERROR_ACCESS_DENIED) {
|
|
/*
|
|
* We assume that some other process had the source or
|
|
* destination file open at the wrong moment and retry.
|
|
* In order to give the other process a higher chance to
|
|
* complete its operation, we give up our time slice now.
|
|
* If we have to retry again, we do sleep a bit.
|
|
*/
|
|
Sleep(delay[tries]);
|
|
tries++;
|
|
goto repeat;
|
|
}
|
|
if (gle == ERROR_ACCESS_DENIED &&
|
|
ask_yes_no_if_possible("Rename from '%s' to '%s' failed. "
|
|
"Should I try again?", pold, pnew))
|
|
goto repeat;
|
|
|
|
errno = EACCES;
|
|
return -1;
|
|
}
|
|
|
|
/*
|
|
* Note that this doesn't return the actual pagesize, but
|
|
* the allocation granularity. If future Windows specific git code
|
|
* needs the real getpagesize function, we need to find another solution.
|
|
*/
|
|
int mingw_getpagesize(void)
|
|
{
|
|
SYSTEM_INFO si;
|
|
GetSystemInfo(&si);
|
|
return si.dwAllocationGranularity;
|
|
}
|
|
|
|
struct passwd *getpwuid(int uid)
|
|
{
|
|
static char user_name[100];
|
|
static struct passwd p;
|
|
|
|
DWORD len = sizeof(user_name);
|
|
if (!GetUserName(user_name, &len))
|
|
return NULL;
|
|
p.pw_name = user_name;
|
|
p.pw_gecos = "unknown";
|
|
p.pw_dir = NULL;
|
|
return &p;
|
|
}
|
|
|
|
static HANDLE timer_event;
|
|
static HANDLE timer_thread;
|
|
static int timer_interval;
|
|
static int one_shot;
|
|
static sig_handler_t timer_fn = SIG_DFL;
|
|
|
|
/* The timer works like this:
|
|
* The thread, ticktack(), is a trivial routine that most of the time
|
|
* only waits to receive the signal to terminate. The main thread tells
|
|
* the thread to terminate by setting the timer_event to the signalled
|
|
* state.
|
|
* But ticktack() interrupts the wait state after the timer's interval
|
|
* length to call the signal handler.
|
|
*/
|
|
|
|
static unsigned __stdcall ticktack(void *dummy)
|
|
{
|
|
while (WaitForSingleObject(timer_event, timer_interval) == WAIT_TIMEOUT) {
|
|
if (timer_fn == SIG_DFL)
|
|
die("Alarm");
|
|
if (timer_fn != SIG_IGN)
|
|
timer_fn(SIGALRM);
|
|
if (one_shot)
|
|
break;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int start_timer_thread(void)
|
|
{
|
|
timer_event = CreateEvent(NULL, FALSE, FALSE, NULL);
|
|
if (timer_event) {
|
|
timer_thread = (HANDLE) _beginthreadex(NULL, 0, ticktack, NULL, 0, NULL);
|
|
if (!timer_thread )
|
|
return errno = ENOMEM,
|
|
error("cannot start timer thread");
|
|
} else
|
|
return errno = ENOMEM,
|
|
error("cannot allocate resources for timer");
|
|
return 0;
|
|
}
|
|
|
|
static void stop_timer_thread(void)
|
|
{
|
|
if (timer_event)
|
|
SetEvent(timer_event); /* tell thread to terminate */
|
|
if (timer_thread) {
|
|
int rc = WaitForSingleObject(timer_thread, 1000);
|
|
if (rc == WAIT_TIMEOUT)
|
|
error("timer thread did not terminate timely");
|
|
else if (rc != WAIT_OBJECT_0)
|
|
error("waiting for timer thread failed: %lu",
|
|
GetLastError());
|
|
CloseHandle(timer_thread);
|
|
}
|
|
if (timer_event)
|
|
CloseHandle(timer_event);
|
|
timer_event = NULL;
|
|
timer_thread = NULL;
|
|
}
|
|
|
|
static inline int is_timeval_eq(const struct timeval *i1, const struct timeval *i2)
|
|
{
|
|
return i1->tv_sec == i2->tv_sec && i1->tv_usec == i2->tv_usec;
|
|
}
|
|
|
|
int setitimer(int type, struct itimerval *in, struct itimerval *out)
|
|
{
|
|
static const struct timeval zero;
|
|
static int atexit_done;
|
|
|
|
if (out != NULL)
|
|
return errno = EINVAL,
|
|
error("setitimer param 3 != NULL not implemented");
|
|
if (!is_timeval_eq(&in->it_interval, &zero) &&
|
|
!is_timeval_eq(&in->it_interval, &in->it_value))
|
|
return errno = EINVAL,
|
|
error("setitimer: it_interval must be zero or eq it_value");
|
|
|
|
if (timer_thread)
|
|
stop_timer_thread();
|
|
|
|
if (is_timeval_eq(&in->it_value, &zero) &&
|
|
is_timeval_eq(&in->it_interval, &zero))
|
|
return 0;
|
|
|
|
timer_interval = in->it_value.tv_sec * 1000 + in->it_value.tv_usec / 1000;
|
|
one_shot = is_timeval_eq(&in->it_interval, &zero);
|
|
if (!atexit_done) {
|
|
atexit(stop_timer_thread);
|
|
atexit_done = 1;
|
|
}
|
|
return start_timer_thread();
|
|
}
|
|
|
|
int sigaction(int sig, struct sigaction *in, struct sigaction *out)
|
|
{
|
|
if (sig != SIGALRM)
|
|
return errno = EINVAL,
|
|
error("sigaction only implemented for SIGALRM");
|
|
if (out != NULL)
|
|
return errno = EINVAL,
|
|
error("sigaction: param 3 != NULL not implemented");
|
|
|
|
timer_fn = in->sa_handler;
|
|
return 0;
|
|
}
|
|
|
|
#undef signal
|
|
sig_handler_t mingw_signal(int sig, sig_handler_t handler)
|
|
{
|
|
sig_handler_t old = timer_fn;
|
|
if (sig != SIGALRM)
|
|
return signal(sig, handler);
|
|
timer_fn = handler;
|
|
return old;
|
|
}
|
|
|
|
static const char *make_backslash_path(const char *path)
|
|
{
|
|
static char buf[PATH_MAX + 1];
|
|
char *c;
|
|
|
|
if (strlcpy(buf, path, PATH_MAX) >= PATH_MAX)
|
|
die("Too long path: %.*s", 60, path);
|
|
|
|
for (c = buf; *c; c++) {
|
|
if (*c == '/')
|
|
*c = '\\';
|
|
}
|
|
return buf;
|
|
}
|
|
|
|
void mingw_open_html(const char *unixpath)
|
|
{
|
|
const char *htmlpath = make_backslash_path(unixpath);
|
|
typedef HINSTANCE (WINAPI *T)(HWND, const char *,
|
|
const char *, const char *, const char *, INT);
|
|
T ShellExecute;
|
|
HMODULE shell32;
|
|
int r;
|
|
|
|
shell32 = LoadLibrary("shell32.dll");
|
|
if (!shell32)
|
|
die("cannot load shell32.dll");
|
|
ShellExecute = (T)GetProcAddress(shell32, "ShellExecuteA");
|
|
if (!ShellExecute)
|
|
die("cannot run browser");
|
|
|
|
printf("Launching default browser to display HTML ...\n");
|
|
r = (int)ShellExecute(NULL, "open", htmlpath, NULL, "\\", SW_SHOWNORMAL);
|
|
FreeLibrary(shell32);
|
|
/* see the MSDN documentation referring to the result codes here */
|
|
if (r <= 32) {
|
|
die("failed to launch browser for %.*s", MAX_PATH, unixpath);
|
|
}
|
|
}
|
|
|
|
int link(const char *oldpath, const char *newpath)
|
|
{
|
|
typedef BOOL (WINAPI *T)(const char*, const char*, LPSECURITY_ATTRIBUTES);
|
|
static T create_hard_link = NULL;
|
|
if (!create_hard_link) {
|
|
create_hard_link = (T) GetProcAddress(
|
|
GetModuleHandle("kernel32.dll"), "CreateHardLinkA");
|
|
if (!create_hard_link)
|
|
create_hard_link = (T)-1;
|
|
}
|
|
if (create_hard_link == (T)-1) {
|
|
errno = ENOSYS;
|
|
return -1;
|
|
}
|
|
if (!create_hard_link(newpath, oldpath, NULL)) {
|
|
errno = err_win_to_posix(GetLastError());
|
|
return -1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
char *getpass(const char *prompt)
|
|
{
|
|
struct strbuf buf = STRBUF_INIT;
|
|
|
|
fputs(prompt, stderr);
|
|
for (;;) {
|
|
char c = _getch();
|
|
if (c == '\r' || c == '\n')
|
|
break;
|
|
strbuf_addch(&buf, c);
|
|
}
|
|
fputs("\n", stderr);
|
|
return strbuf_detach(&buf, NULL);
|
|
}
|
|
|
|
pid_t waitpid(pid_t pid, int *status, int options)
|
|
{
|
|
HANDLE h = OpenProcess(SYNCHRONIZE | PROCESS_QUERY_INFORMATION,
|
|
FALSE, pid);
|
|
if (!h) {
|
|
errno = ECHILD;
|
|
return -1;
|
|
}
|
|
|
|
if (pid > 0 && options & WNOHANG) {
|
|
if (WAIT_OBJECT_0 != WaitForSingleObject(h, 0)) {
|
|
CloseHandle(h);
|
|
return 0;
|
|
}
|
|
options &= ~WNOHANG;
|
|
}
|
|
|
|
if (options == 0) {
|
|
struct pinfo_t **ppinfo;
|
|
if (WaitForSingleObject(h, INFINITE) != WAIT_OBJECT_0) {
|
|
CloseHandle(h);
|
|
return 0;
|
|
}
|
|
|
|
if (status)
|
|
GetExitCodeProcess(h, (LPDWORD)status);
|
|
|
|
EnterCriticalSection(&pinfo_cs);
|
|
|
|
ppinfo = &pinfo;
|
|
while (*ppinfo) {
|
|
struct pinfo_t *info = *ppinfo;
|
|
if (info->pid == pid) {
|
|
CloseHandle(info->proc);
|
|
*ppinfo = info->next;
|
|
free(info);
|
|
break;
|
|
}
|
|
ppinfo = &info->next;
|
|
}
|
|
|
|
LeaveCriticalSection(&pinfo_cs);
|
|
|
|
CloseHandle(h);
|
|
return pid;
|
|
}
|
|
CloseHandle(h);
|
|
|
|
errno = EINVAL;
|
|
return -1;
|
|
}
|