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Tip revision: 6c41b80153a2e4ee347d0e968ee8d0d9abfc8862 authored by Junio C Hamano on 02 April 2008, 17:42:14 UTC
GIT 1.5.5-rc3
GIT 1.5.5-rc3
Tip revision: 6c41b80
exec_cmd.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, ':');
}
}
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);
}