2.9BSD - /usr/src/cmd/uucp/shio.c

   1: #ifndef lint
   2: static char sccsid[] = "@(#)shio.c	5.1 (Berkeley) 7/2/83";
   3: #endif
   4: 
   5: #include "uucp.h"
   6: #include <signal.h>
   7: 
   8: 
   9: /*******
  10:  *	shio(cmd, fi, fo, user)	execute shell of command with
  11:  *	char *cmd, *fi, *fo;	fi and fo as standard input/output
  12:  *	char *user;		user name
  13:  *
  14:  *	return codes:
  15:  *		0  - ok
  16:  *		non zero -  failed  -  status from child
  17:  */
  18: 
  19: shio(cmd, fi, fo, user)
  20: char *cmd, *fi, *fo, *user;
  21: {
  22:     int status, f;
  23:     int uid, pid, ret;
  24:     char path[MAXFULLNAME];
  25: 
  26:     if (fi == NULL)
  27:         fi = "/dev/null";
  28:     if (fo == NULL)
  29:         fo = "/dev/null";
  30: 
  31:     DEBUG(3, "shio - %s\n", cmd);
  32:     if ((pid = fork()) == 0) {
  33:         signal(SIGINT, SIG_IGN);
  34:         signal(SIGHUP, SIG_IGN);
  35:         signal(SIGQUIT, SIG_IGN);
  36:         signal(SIGKILL, SIG_IGN);
  37:         close(Ifn);
  38:         close(Ofn);
  39:         close(0);
  40:         if (user == NULL
  41:         || (gninfo(user, &uid, path) != 0)
  42:         || setuid(uid))
  43:             setuid(getuid());
  44:         f = open(subfile(fi), 0);
  45:         if (f != 0)
  46:             exit(f);
  47:         close(1);
  48:         f = creat(subfile(fo), 0666);
  49:         if (f != 1)
  50:             exit(f);
  51:         execl(SHELL, "sh", "-c", cmd, (char *)0);
  52:         exit(100);
  53:     }
  54:     while ((ret = wait(&status)) != pid && ret != -1);
  55:     DEBUG(3, "status %d\n", status);
  56:     return(status);
  57: }

Defined functions

Defined variables