Function execCommand

popt/popt.c:448–550

}

static int execCommand(poptContext con)
{
    poptItem item = con->doExec;
    poptArgv argv = NULL;
    int argc = 0;
    int rc;
    int ec = POPT_ERROR_ERRNO;

    if (item == NULL) /*XXX can't happen*/
	return POPT_ERROR_NOARG;

    if (item->argv == NULL || item->argc < 1 ||
	(!con->execAbsolute && strchr(item->argv[0], '/')))
	    return POPT_ERROR_NOARG;

    argv = malloc(sizeof(*argv) *
			(6 + item->argc + con->numLeftovers + con->finalArgvCount));
    if (argv == NULL) return POPT_ERROR_MALLOC;

    if (!strchr(item->argv[0], '/') && con->execPath != NULL) {
	char *s = malloc(strlen(con->execPath) + strlen(item->argv[0]) + sizeof("/"));
	if (s)
	    (void)stpcpy(stpcpy(stpcpy(s, con->execPath), "/"), item->argv[0]);

	argv[argc] = s;
    } else
	argv[argc] = findProgramPath(item->argv[0]);
    if (argv[argc++] == NULL) {
	ec = POPT_ERROR_NOARG;
	goto exit;
    }

    if (item->argc > 1) {
	memcpy(argv + argc, item->argv + 1, sizeof(*argv) * (item->argc - 1));
	argc += (item->argc - 1);
    }

    if (con->finalArgv != NULL && con->finalArgvCount > 0) {
	memcpy(argv + argc, con->finalArgv,
		sizeof(*argv) * con->finalArgvCount);
	argc += con->finalArgvCount;
    }

    if (con->leftovers != NULL && con->numLeftovers > 0) {
	memcpy(argv + argc, con->leftovers, sizeof(*argv) * con->numLeftovers);
	argc += con->numLeftovers;
    }

    argv[argc] = NULL;

#if defined(hpux) || defined(__hpux)
    rc = setresgid(getgid(), getgid(),-1);
    if (rc) goto exit;
    rc = setresuid(getuid(), getuid(),-1);
    if (rc) goto exit;
#else
/*
 * XXX " ... on BSD systems setuid() should be preferred over setreuid()"