mirror of
https://github.com/git/git.git
synced 2024-12-02 22:43:44 +08:00
120 lines
2.2 KiB
C
120 lines
2.2 KiB
C
#include "cache.h"
|
|
#include "exec_cmd.h"
|
|
#include "quote.h"
|
|
#define MAX_ARGS 32
|
|
|
|
extern char **environ;
|
|
static const char *builtin_exec_path = GIT_EXEC_PATH;
|
|
static const char *argv_exec_path;
|
|
|
|
void git_set_argv_exec_path(const char *exec_path)
|
|
{
|
|
argv_exec_path = exec_path;
|
|
}
|
|
|
|
|
|
/* Returns the highest-priority, location to look for git programs. */
|
|
const char *git_exec_path(void)
|
|
{
|
|
const char *env;
|
|
|
|
if (argv_exec_path)
|
|
return argv_exec_path;
|
|
|
|
env = getenv(EXEC_PATH_ENVIRONMENT);
|
|
if (env && *env) {
|
|
return env;
|
|
}
|
|
|
|
return builtin_exec_path;
|
|
}
|
|
|
|
static void add_path(struct strbuf *out, const char *path)
|
|
{
|
|
if (path && *path) {
|
|
if (is_absolute_path(path))
|
|
strbuf_addstr(out, path);
|
|
else
|
|
strbuf_addstr(out, make_absolute_path(path));
|
|
|
|
strbuf_addch(out, PATH_SEP);
|
|
}
|
|
}
|
|
|
|
void setup_path(const char *cmd_path)
|
|
{
|
|
const char *old_path = getenv("PATH");
|
|
struct strbuf new_path;
|
|
|
|
strbuf_init(&new_path, 0);
|
|
|
|
add_path(&new_path, argv_exec_path);
|
|
add_path(&new_path, getenv(EXEC_PATH_ENVIRONMENT));
|
|
add_path(&new_path, builtin_exec_path);
|
|
add_path(&new_path, cmd_path);
|
|
|
|
if (old_path)
|
|
strbuf_addstr(&new_path, old_path);
|
|
else
|
|
strbuf_addstr(&new_path, "/usr/local/bin:/usr/bin:/bin");
|
|
|
|
setenv("PATH", new_path.buf, 1);
|
|
|
|
strbuf_release(&new_path);
|
|
}
|
|
|
|
int execv_git_cmd(const char **argv)
|
|
{
|
|
struct strbuf cmd;
|
|
const char *tmp;
|
|
|
|
strbuf_init(&cmd, 0);
|
|
strbuf_addf(&cmd, "git-%s", argv[0]);
|
|
|
|
/*
|
|
* argv[0] must be the git command, but the argv array
|
|
* belongs to the caller, and may be reused in
|
|
* subsequent loop iterations. Save argv[0] and
|
|
* restore it on error.
|
|
*/
|
|
tmp = argv[0];
|
|
argv[0] = cmd.buf;
|
|
|
|
trace_argv_printf(argv, "trace: exec:");
|
|
|
|
/* execvp() can only ever return if it fails */
|
|
execvp(cmd.buf, (char **)argv);
|
|
|
|
trace_printf("trace: exec failed: %s\n", strerror(errno));
|
|
|
|
argv[0] = tmp;
|
|
|
|
strbuf_release(&cmd);
|
|
|
|
return -1;
|
|
}
|
|
|
|
|
|
int execl_git_cmd(const char *cmd,...)
|
|
{
|
|
int argc;
|
|
const char *argv[MAX_ARGS + 1];
|
|
const char *arg;
|
|
va_list param;
|
|
|
|
va_start(param, cmd);
|
|
argv[0] = cmd;
|
|
argc = 1;
|
|
while (argc < MAX_ARGS) {
|
|
arg = argv[argc++] = va_arg(param, char *);
|
|
if (!arg)
|
|
break;
|
|
}
|
|
va_end(param);
|
|
if (MAX_ARGS <= argc)
|
|
return error("too many args to run %s", cmd);
|
|
|
|
argv[argc] = NULL;
|
|
return execv_git_cmd(argv);
|
|
}
|