+ /* parent reads from pipefds[0] */
+ if (result) {
+ close(pipefds[1]);
+ len = 0;
+ while (1) {
+ count = read(pipefds[0], result + len, ressize - len-1);
+ if (count < 0) {
+ err("read failed with '%s'", strerror(errno));
+ retval = -1;
+ break;
+ }
+
+ if (count == 0)
+ break;
+
+ len += count;
+ if (len >= ressize-1) {
+ err("ressize %d too short", ressize);
+ retval = -1;
+ break;
+ }
+ }
+ result[len] = '\0';
+ close(pipefds[0]);
+ if (reslen)
+ *reslen = len;
+ }
+ waitpid(pid, &status, 0);
+
+ if (!WIFEXITED(status) || (WEXITSTATUS(status) != 0)) {
+ dbg("exec program status 0x%x", status);
+ retval = -1;
+ }