static void exec_cmd(int fdin, int fdout,
const char** argv,
const str* env,
const struct passwd* pw)
{
selfpipe_close();
dup2(fdin, 0);
dup2(fdout, 1);
dup2(fdout, 2);
close(fdin);
close(fdout);
if (!testmode) {
if (initgroups(pw->pw_name, pw->pw_gid) != 0)
die1sys(111, "Could not initgroups");
if (setgid(pw->pw_gid) != 0)
die1sys(111, "Could not setgid");
if (setuid(pw->pw_uid) != 0)
die1sys(111, "Could not setuid");
}
if (chdir(pw->pw_dir) != 0)
die1sys(111, "Could not change directory");
if (env)
if ((environ = envstr_make_array(env)) == 0)
die_oom(111);
execv(argv[0], (char**)argv);
die3sys(111, "Could not execute '", argv[0], "'");
exit(111);
}
int selfpipe_init (void) {
if (selfpipe[0] >= 0) return (errno = EBUSY, -1);
if (pipe(selfpipe) == -1) return -1;
if ((ndelay_on(selfpipe[1]) == -1)
|| (coe(selfpipe[1]) == -1)
|| (ndelay_on(selfpipe[0]) == -1)
|| (coe(selfpipe[0]) == -1))
selfpipe_close();
return selfpipe[0];
}
void selfpipe_finish (void) {
selfpipe_close();
}