| 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 | } |