qmail 1.03 import

1 files changed, 37 insertions, 0 deletions

diff --git a/except.c b/except.c
new file mode 100644
index 0000000..c553b3b
--- /dev/null
+++ b/except.c
@@ -0,0 +1,37 @@
+#include "fork.h"
+#include "strerr.h"
+#include "wait.h"
+#include "error.h"
+#include "exit.h"
+
+#define FATAL "except: fatal: "
+
+void main(argc,argv)
+int argc;
+char **argv;
+{
+  int pid;
+  int wstat;
+
+  if (!argv[1])
+    strerr_die1x(100,"except: usage: except program [ arg ... ]");
+
+  pid = fork();
+  if (pid == -1)
+    strerr_die2sys(111,FATAL,"unable to fork: ");
+  if (pid == 0) {
+    execvp(argv[1],argv + 1);
+    if (error_temp(errno)) _exit(111);
+    _exit(100);
+  }
+
+  if (wait_pid(&wstat,pid) == -1)
+    strerr_die2x(111,FATAL,"wait failed");
+  if (wait_crashed(wstat))
+    strerr_die2x(111,FATAL,"child crashed");
+  switch(wait_exitcode(wstat)) {
+    case 0: _exit(100);
+    case 111: strerr_die2x(111,FATAL,"temporary child error");
+    default: _exit(0);
+  }
+}