run_command
(void)run_command(cmd, NULL, -1, -1, dirname, NULL);
(void)run_command(shellcmd, NULL, 0, 1, "-c", cmd, NULL);
(void)run_command(shellcmd, NULL, 0, 1, NULL);
if (run_command(shellcmd,
rc2 = run_command(shellcmd, NULL, nullfd, fileno(fbuf), "-c", cp + 1, NULL);
if (run_command(editcmd, NULL, 0, -1, tempname, NULL) < 0) {
int run_command(const char *, sigset_t *, int, int, ...);