6 static const char *argv_exec_path;
7 static const char *argv0_path;
9 char *system_path(const char *path)
12 static const char *prefix;
14 static const char *prefix = PREFIX;
16 struct strbuf d = STRBUF_INIT;
18 if (is_absolute_path(path))
23 assert(is_absolute_path(argv0_path));
26 !(prefix = strip_path_suffix(argv0_path, GIT_EXEC_PATH)) &&
27 !(prefix = strip_path_suffix(argv0_path, BINDIR)) &&
28 !(prefix = strip_path_suffix(argv0_path, "git"))) {
30 trace_printf("RUNTIME_PREFIX requested, "
31 "but prefix computation failed. "
32 "Using static fallback '%s'.\n", prefix);
36 strbuf_addf(&d, "%s/%s", prefix, path);
37 return strbuf_detach(&d, NULL);
40 const char *git_extract_argv0_path(const char *argv0)
44 if (!argv0 || !*argv0)
47 slash = find_last_dir_sep(argv0);
50 argv0_path = xstrndup(argv0, slash - argv0);
57 void git_set_argv_exec_path(const char *exec_path)
59 argv_exec_path = exec_path;
61 * Propagate this setting to external programs.
63 setenv(EXEC_PATH_ENVIRONMENT, exec_path, 1);
67 /* Returns the highest-priority, location to look for git programs. */
68 const char *git_exec_path(void)
73 return argv_exec_path;
75 env = getenv(EXEC_PATH_ENVIRONMENT);
80 return system_path(GIT_EXEC_PATH);
83 static void add_path(struct strbuf *out, const char *path)
86 strbuf_add_absolute_path(out, path);
87 strbuf_addch(out, PATH_SEP);
93 const char *old_path = getenv("PATH");
94 struct strbuf new_path = STRBUF_INIT;
96 add_path(&new_path, git_exec_path());
99 strbuf_addstr(&new_path, old_path);
101 strbuf_addstr(&new_path, _PATH_DEFPATH);
103 setenv("PATH", new_path.buf, 1);
105 strbuf_release(&new_path);
108 const char **prepare_git_cmd(const char **argv)
113 for (argc = 0; argv[argc]; argc++)
114 ; /* just counting */
115 nargv = xmalloc(sizeof(*nargv) * (argc + 2));
118 for (argc = 0; argv[argc]; argc++)
119 nargv[argc + 1] = argv[argc];
120 nargv[argc + 1] = NULL;
124 int execv_git_cmd(const char **argv) {
125 const char **nargv = prepare_git_cmd(argv);
126 trace_argv_printf(nargv, "trace: exec:");
128 /* execvp() can only ever return if it fails */
129 sane_execvp("git", (char **)nargv);
131 trace_printf("trace: exec failed: %s\n", strerror(errno));
138 int execl_git_cmd(const char *cmd,...)
141 const char *argv[MAX_ARGS + 1];
145 va_start(param, cmd);
148 while (argc < MAX_ARGS) {
149 arg = argv[argc++] = va_arg(param, char *);
154 if (MAX_ARGS <= argc)
155 return error("too many args to run %s", cmd);
158 return execv_git_cmd(argv);