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bouncesaying.c (884B)

      1 #include "fork.h"
      2 #include "strerr.h"
      3 #include "error.h"
      4 #include "wait.h"
      5 #include "sig.h"
      6 #include "exit.h"
      7 
      8 #define FATAL "bouncesaying: fatal: "
      9 
     10 int main(int argc, char **argv)
     11 {
     12   int pid;
     13   int wstat;
     14 
     15   if (argc == 1)
     16     strerr_die1x(100,"bouncesaying: usage: bouncesaying error [ program [ arg ... ] ]");
     17 
     18   if (argv[2]) {
     19     pid = fork();
     20     if (pid == -1)
     21       strerr_die2sys(111,FATAL,"unable to fork: ");
     22     if (pid == 0) {
     23       execvp(argv[2],argv + 2);
     24       if (error_temp(errno)) _exit(111);
     25       _exit(100);
     26     }
     27     if (wait_pid(&wstat,pid) == -1)
     28       strerr_die2x(111,FATAL,"wait failed");
     29     if (wait_crashed(wstat))
     30       strerr_die2x(111,FATAL,"child crashed");
     31     switch(wait_exitcode(wstat)) {
     32       case 0: break;
     33       case 111: strerr_die2x(111,FATAL,"temporary child error");
     34       default: _exit(0);
     35     }
     36   }
     37 
     38   strerr_die1x(100,argv[1]);
     39 }