-/* Start an inferior process and returns its pid.
- ALLARGS is a string containing shell command to run the program.
- ENV is the environment vector to pass. */
-
-#ifndef SHELL_FILE
-#define SHELL_FILE "/bin/sh"
-#endif
-
-int
-create_inferior (allargs, env)
- char *allargs;
- char **env;
-{
- int pid;
- char *shell_command;
- extern int sys_nerr;
- extern char *sys_errlist[];
- extern int errno;
-
- /* If desired, concat something onto the front of ALLARGS.
- SHELL_COMMAND is the result. */
-#ifdef SHELL_COMMAND_CONCAT
- shell_command = (char *) alloca (strlen (SHELL_COMMAND_CONCAT) + strlen (allargs) + 1);
- strcpy (shell_command, SHELL_COMMAND_CONCAT);
- strcat (shell_command, allargs);
-#else
- shell_command = allargs;
-#endif
-
- /* exec is said to fail if the executable is open. */
- close_exec_file ();
-
-#if defined(USG) && !defined(HAVE_VFORK)
- pid = fork ();
-#else
- pid = vfork ();
-#endif
-
- if (pid < 0)
- perror_with_name ("vfork");
-
- if (pid == 0)
- {
-#ifdef TIOCGPGRP
- /* Run inferior in a separate process group. */
- setpgrp (getpid (), getpid ());
-#endif /* TIOCGPGRP */
-
-#ifdef SET_STACK_LIMIT_HUGE
- /* Reset the stack limit back to what it was. */
- {
- struct rlimit rlim;
-
- getrlimit (RLIMIT_STACK, &rlim);
- rlim.rlim_cur = original_stack_limit;
- setrlimit (RLIMIT_STACK, &rlim);
- }
-#endif /* SET_STACK_LIMIT_HUGE */
-
-
- inferior_thisrun_terminal = inferior_io_terminal;
- if (inferior_io_terminal != 0)
- new_tty (inferior_io_terminal);
-
-/* It seems that changing the signal handlers for the inferior after
- a vfork also changes them for the superior. See comments in
- initialize_signals for how we get the right signal handlers
- for the inferior. */
-/* Not needed on Sun, at least, and loses there
- because it clobbers the superior. */
-/*??? signal (SIGQUIT, SIG_DFL);
- signal (SIGINT, SIG_DFL); */
-
- call_ptrace (0);
- execle (SHELL_FILE, "sh", "-c", shell_command, 0, env);
-
- fprintf (stderr, "Cannot exec %s: %s.\n", SHELL_FILE,
- errno < sys_nerr ? sys_errlist[errno] : "unknown error");
- fflush (stderr);
- _exit (0177);
- }
-
-#ifdef CREATE_INFERIOR_HOOK
- CREATE_INFERIOR_HOOK (pid);
-#endif
- return pid;
-}
-