user/initsh.c

   1 #include <inc/lib.h>
   2
   3 void
   4 umain(int argc, char **argv)
   5 {
   6         int i, r, x, want;
   7
   8         cprintf("initsh: running sh\n");
   9
  10         // being run directly from kernel, so no file descriptors open yet
  11         close(0);
  12         if ((r = opencons()) < 0)
  13                 panic("opencons: %e", r);
  14         if (r != 0)
  15                 panic("first opencons used fd %d", r);
  16         if ((r = dup(0, 1)) < 0)
  17                 panic("dup: %e", r);
  18         while (1) {
  19                 cprintf("init: starting sh\n");
  20                 r = spawnl("/sh", "sh", (char*)0);
  21                 if (r < 0) {
  22                         cprintf("init: spawn sh: %e\n", r);
  23                         continue;
  24                 }
  25                 wait(r);
  26         }
  27 }