mirror of
https://github.com/git/git.git
synced 2024-11-24 02:17:02 +08:00
f655651e09
Reduce the use of fixed sized buffer passed to getcwd() calls by introducing xgetcwd() helper. * rs/strbuf-getcwd: use strbuf_add_absolute_path() to add absolute paths abspath: convert absolute_path() to strbuf use xgetcwd() to set $GIT_DIR use xgetcwd() to get the current directory or die wrapper: add xgetcwd() abspath: convert real_path_internal() to strbuf abspath: use strbuf_getcwd() to remember original working directory setup: convert setup_git_directory_gently_1 et al. to strbuf unix-sockets: use strbuf_getcwd() strbuf: add strbuf_getcwd()
124 lines
2.4 KiB
C
124 lines
2.4 KiB
C
#include "cache.h"
|
|
#include "unix-socket.h"
|
|
|
|
static int unix_stream_socket(void)
|
|
{
|
|
int fd = socket(AF_UNIX, SOCK_STREAM, 0);
|
|
if (fd < 0)
|
|
die_errno("unable to create socket");
|
|
return fd;
|
|
}
|
|
|
|
static int chdir_len(const char *orig, int len)
|
|
{
|
|
char *path = xmemdupz(orig, len);
|
|
int r = chdir(path);
|
|
free(path);
|
|
return r;
|
|
}
|
|
|
|
struct unix_sockaddr_context {
|
|
char *orig_dir;
|
|
};
|
|
|
|
static void unix_sockaddr_cleanup(struct unix_sockaddr_context *ctx)
|
|
{
|
|
if (!ctx->orig_dir)
|
|
return;
|
|
/*
|
|
* If we fail, we can't just return an error, since we have
|
|
* moved the cwd of the whole process, which could confuse calling
|
|
* code. We are better off to just die.
|
|
*/
|
|
if (chdir(ctx->orig_dir) < 0)
|
|
die("unable to restore original working directory");
|
|
free(ctx->orig_dir);
|
|
}
|
|
|
|
static int unix_sockaddr_init(struct sockaddr_un *sa, const char *path,
|
|
struct unix_sockaddr_context *ctx)
|
|
{
|
|
int size = strlen(path) + 1;
|
|
|
|
ctx->orig_dir = NULL;
|
|
if (size > sizeof(sa->sun_path)) {
|
|
const char *slash = find_last_dir_sep(path);
|
|
const char *dir;
|
|
struct strbuf cwd = STRBUF_INIT;
|
|
|
|
if (!slash) {
|
|
errno = ENAMETOOLONG;
|
|
return -1;
|
|
}
|
|
|
|
dir = path;
|
|
path = slash + 1;
|
|
size = strlen(path) + 1;
|
|
if (size > sizeof(sa->sun_path)) {
|
|
errno = ENAMETOOLONG;
|
|
return -1;
|
|
}
|
|
if (strbuf_getcwd(&cwd))
|
|
return -1;
|
|
ctx->orig_dir = strbuf_detach(&cwd, NULL);
|
|
if (chdir_len(dir, slash - dir) < 0)
|
|
return -1;
|
|
}
|
|
|
|
memset(sa, 0, sizeof(*sa));
|
|
sa->sun_family = AF_UNIX;
|
|
memcpy(sa->sun_path, path, size);
|
|
return 0;
|
|
}
|
|
|
|
int unix_stream_connect(const char *path)
|
|
{
|
|
int fd, saved_errno;
|
|
struct sockaddr_un sa;
|
|
struct unix_sockaddr_context ctx;
|
|
|
|
if (unix_sockaddr_init(&sa, path, &ctx) < 0)
|
|
return -1;
|
|
fd = unix_stream_socket();
|
|
if (connect(fd, (struct sockaddr *)&sa, sizeof(sa)) < 0)
|
|
goto fail;
|
|
unix_sockaddr_cleanup(&ctx);
|
|
return fd;
|
|
|
|
fail:
|
|
saved_errno = errno;
|
|
unix_sockaddr_cleanup(&ctx);
|
|
close(fd);
|
|
errno = saved_errno;
|
|
return -1;
|
|
}
|
|
|
|
int unix_stream_listen(const char *path)
|
|
{
|
|
int fd, saved_errno;
|
|
struct sockaddr_un sa;
|
|
struct unix_sockaddr_context ctx;
|
|
|
|
unlink(path);
|
|
|
|
if (unix_sockaddr_init(&sa, path, &ctx) < 0)
|
|
return -1;
|
|
fd = unix_stream_socket();
|
|
|
|
if (bind(fd, (struct sockaddr *)&sa, sizeof(sa)) < 0)
|
|
goto fail;
|
|
|
|
if (listen(fd, 5) < 0)
|
|
goto fail;
|
|
|
|
unix_sockaddr_cleanup(&ctx);
|
|
return fd;
|
|
|
|
fail:
|
|
saved_errno = errno;
|
|
unix_sockaddr_cleanup(&ctx);
|
|
close(fd);
|
|
errno = saved_errno;
|
|
return -1;
|
|
}
|