1 #include "fork.h"

     2 #include "strerr.h"

     3 #include "wait.h"

     4 #include "error.h"

     5 #include "exit.h"

     6 

     7 #define FATAL "except: fatal: "

     8 

     9 void main(argc,argv)

    10 int argc;

    11 char **argv;

    12 {

    13   int pid;

    14   int wstat;

    15 

    16   if (!argv[1])

    17     strerr_die1x(100,"except: usage: except program [ arg ... ]");

    18 

    19   pid = fork();

    20   if (pid == -1)

    21     strerr_die2sys(111,FATAL,"unable to fork: ");

    22   if (pid == 0) {

    23     execvp(argv[1],argv + 1);

    24     if (error_temp(errno)) _exit(111);

    25     _exit(100);

    26   }

    27 

    28   if (wait_pid(&wstat,pid) == -1)

    29     strerr_die2x(111,FATAL,"wait failed");

    30   if (wait_crashed(wstat))

    31     strerr_die2x(111,FATAL,"child crashed");

    32   switch(wait_exitcode(wstat)) {

    33     case 0: _exit(100);

    34     case 111: strerr_die2x(111,FATAL,"temporary child error");

    35     default: _exit(0);

    36   }

    37 }