4 #include "subcmd-config.h"
10 static const char *argv_exec_path;
11 static const char *argv0_path;
13 void exec_cmd_init(const char *exec_name, const char *prefix,
14 const char *exec_path, const char *exec_path_env)
16 subcmd_config.exec_name = exec_name;
17 subcmd_config.prefix = prefix;
18 subcmd_config.exec_path = exec_path;
19 subcmd_config.exec_path_env = exec_path_env;
22 char *system_path(const char *path)
24 struct strbuf d = STRBUF_INIT;
26 if (is_absolute_path(path))
29 strbuf_addf(&d, "%s/%s", subcmd_config.prefix, path);
30 path = strbuf_detach(&d, NULL);
34 const char *perf_extract_argv0_path(const char *argv0)
38 if (!argv0 || !*argv0)
40 slash = argv0 + strlen(argv0);
42 while (argv0 <= slash && !is_dir_sep(*slash))
46 argv0_path = strndup(argv0, slash - argv0);
47 return argv0_path ? slash + 1 : NULL;
53 void perf_set_argv_exec_path(const char *exec_path)
55 argv_exec_path = exec_path;
57 * Propagate this setting to external programs.
59 setenv(subcmd_config.exec_path_env, exec_path, 1);
63 /* Returns the highest-priority, location to look for perf programs. */
64 char *perf_exec_path(void)
69 return strdup(argv_exec_path);
71 env = getenv(subcmd_config.exec_path_env);
75 return system_path(subcmd_config.exec_path);
78 static void add_path(struct strbuf *out, const char *path)
81 if (is_absolute_path(path))
82 strbuf_addstr(out, path);
84 strbuf_addstr(out, make_nonrelative_path(path));
86 strbuf_addch(out, PATH_SEP);
92 const char *old_path = getenv("PATH");
93 struct strbuf new_path = STRBUF_INIT;
94 char *tmp = perf_exec_path();
96 add_path(&new_path, tmp);
97 add_path(&new_path, argv0_path);
101 strbuf_addstr(&new_path, old_path);
103 strbuf_addstr(&new_path, "/usr/local/bin:/usr/bin:/bin");
105 setenv("PATH", new_path.buf, 1);
107 strbuf_release(&new_path);
110 static const char **prepare_perf_cmd(const char **argv)
115 for (argc = 0; argv[argc]; argc++)
116 ; /* just counting */
117 nargv = malloc(sizeof(*nargv) * (argc + 2));
119 nargv[0] = subcmd_config.exec_name;
120 for (argc = 0; argv[argc]; argc++)
121 nargv[argc + 1] = argv[argc];
122 nargv[argc + 1] = NULL;
126 int execv_perf_cmd(const char **argv) {
127 const char **nargv = prepare_perf_cmd(argv);
129 /* execvp() can only ever return if it fails */
130 execvp(subcmd_config.exec_name, (char **)nargv);
137 int execl_perf_cmd(const char *cmd,...)
140 const char *argv[MAX_ARGS + 1];
144 va_start(param, cmd);
147 while (argc < MAX_ARGS) {
148 arg = argv[argc++] = va_arg(param, char *);
153 if (MAX_ARGS <= argc)
154 return error("too many args to run %s", cmd);
157 return execv_perf_cmd(argv);