9 static const char *argv_exec_path;
10 static const char *argv0_path;
12 const char *system_path(const char *path)
14 static const char *prefix = PREFIX;
15 struct strbuf d = STRBUF_INIT;
17 if (is_absolute_path(path))
20 strbuf_addf(&d, "%s/%s", prefix, path);
21 path = strbuf_detach(&d, NULL);
25 const char *perf_extract_argv0_path(const char *argv0)
29 if (!argv0 || !*argv0)
31 slash = argv0 + strlen(argv0);
33 while (argv0 <= slash && !is_dir_sep(*slash))
37 argv0_path = strndup(argv0, slash - argv0);
38 return argv0_path ? slash + 1 : NULL;
44 void perf_set_argv_exec_path(const char *exec_path)
46 argv_exec_path = exec_path;
48 * Propagate this setting to external programs.
50 setenv(EXEC_PATH_ENVIRONMENT, exec_path, 1);
54 /* Returns the highest-priority, location to look for perf programs. */
55 const char *perf_exec_path(void)
60 return argv_exec_path;
62 env = getenv(EXEC_PATH_ENVIRONMENT);
67 return system_path(PERF_EXEC_PATH);
70 static void add_path(struct strbuf *out, const char *path)
73 if (is_absolute_path(path))
74 strbuf_addstr(out, path);
76 strbuf_addstr(out, make_nonrelative_path(path));
78 strbuf_addch(out, PATH_SEP);
84 const char *old_path = getenv("PATH");
85 struct strbuf new_path = STRBUF_INIT;
87 add_path(&new_path, perf_exec_path());
88 add_path(&new_path, argv0_path);
91 strbuf_addstr(&new_path, old_path);
93 strbuf_addstr(&new_path, "/usr/local/bin:/usr/bin:/bin");
95 setenv("PATH", new_path.buf, 1);
97 strbuf_release(&new_path);
100 static const char **prepare_perf_cmd(const char **argv)
105 for (argc = 0; argv[argc]; argc++)
106 ; /* just counting */
107 nargv = malloc(sizeof(*nargv) * (argc + 2));
110 for (argc = 0; argv[argc]; argc++)
111 nargv[argc + 1] = argv[argc];
112 nargv[argc + 1] = NULL;
116 int execv_perf_cmd(const char **argv) {
117 const char **nargv = prepare_perf_cmd(argv);
119 /* execvp() can only ever return if it fails */
120 execvp("perf", (char **)nargv);
127 int execl_perf_cmd(const char *cmd,...)
130 const char *argv[MAX_ARGS + 1];
134 va_start(param, cmd);
137 while (argc < MAX_ARGS) {
138 arg = argv[argc++] = va_arg(param, char *);
143 if (MAX_ARGS <= argc)
144 return error("too many args to run %s", cmd);
147 return execv_perf_cmd(argv);