run_command
run_command(cmd, 0, -1, -1, dirname, NULL, NULL);
run_command(sh, 0, -1, -1, "-c", cmd, NULL);
run_command(sh, 0, -1, -1, NULL, NULL, NULL);
rc = run_command(sh, 0, nullfd, fileno(fbuf),
if (run_command(sh, 0, fileno(fp), fileno(nf), "-c", cmd, NULL) < 0) {
if (run_command(edit, 0, -1, -1, tempname, NULL, NULL) < 0) {
int run_command(char *, sigset_t *, int, int, char *, char *, char *);