UNIX 7th Ed. - /usr/src/cmd/uucp/shio.c

   1: #include "uucp.h"
   2: 
   3: 
   4: /*******
   5:  *	shio(cmd, fi, fo, user)	execute shell of command with
   6:  *	char *cmd, *fi, *fo;	fi and fo as standard input/output
   7:  *	char *user;		user name
   8:  *
   9:  *	return codes:
  10:  *		0  - ok
  11:  *		non zero -  failed  -  status from child
  12:  */
  13: 
  14: shio(cmd, fi, fo, user)
  15: char *cmd, *fi, *fo, *user;
  16: {
  17:     int status, f;
  18:     int uid, pid, ret;
  19:     char path[MAXFULLNAME];
  20: 
  21:     if (fi == NULL)
  22:         fi = "/dev/null";
  23:     if (fo == NULL)
  24:         fo = "/dev/null";
  25: 
  26:     DEBUG(3, "shio - %s\n", cmd);
  27:     if ((pid = fork()) == 0) {
  28:         close(Ifn);
  29:         close(Ofn);
  30:         close(0);
  31:         f = open(fi, 0);
  32:         ASSERT(f == 0, "BAD OPEN fileno %d", f);
  33:         close(1);
  34:         f = creat(fo, 0666);
  35:         ASSERT(f == 1, "BAD OPEN fileno %d", f);
  36:         if (gninfo(user, &uid, path) == 0)
  37:             setuid(uid);
  38:         execl(SHELL, "sh", "-c", cmd, 0);
  39:         exit(100);
  40:     }
  41:     while ((ret = wait(&status)) != pid && ret != -1);
  42:     DEBUG(3, "status %d\n", status);
  43:     return(status);
  44: }

Defined functions