1 files changed, 138 insertions, 0 deletions
diff --git a/builtins/wait.c b/builtins/wait.c
new file mode 100644
index 0000000..60043df
--- /dev/null
+++ b/builtins/wait.c
@@ -0,0 +1,138 @@
+/* wait.c, created from wait.def. */
+#line 38 "./wait.def"
+
+#line 53 "./wait.def"
+
+#include <config.h>
+
+#include "../bashtypes.h"
+#include <signal.h>
+
+#if defined (HAVE_UNISTD_H)
+#  include <unistd.h>
+#endif
+
+#include <chartypes.h>
+
+#include "../bashansi.h"
+
+#include "../shell.h"
+#include "../jobs.h"
+#include "common.h"
+#include "bashgetopt.h"
+
+extern int wait_signal_received;
+
+procenv_t wait_intr_buf;
+
+/* Wait for the pid in LIST to stop or die.  If no arguments are given, then
+   wait for all of the active background processes of the shell and return
+   0.  If a list of pids or job specs are given, return the exit status of
+   the last one waited for. */
+
+#define WAIT_RETURN(s) \
+  do \
+    { \
+      interrupt_immediately = old_interrupt_immediately;\
+      return (s);\
+    } \
+  while (0)
+
+int
+wait_builtin (list)
+     WORD_LIST *list;
+{
+  int status, code;
+  volatile int old_interrupt_immediately;
+
+  USE_VAR(list);
+
+  if (no_options (list))
+    return (EX_USAGE);
+  list = loptend;
+
+  old_interrupt_immediately = interrupt_immediately;
+  interrupt_immediately++;
+
+  /* POSIX.2 says:  When the shell is waiting (by means of the wait utility)
+     for asynchronous commands to complete, the reception of a signal for
+     which a trap has been set shall cause the wait utility to return
+     immediately with an exit status greater than 128, after which the trap
+     associated with the signal shall be taken.
+
+     We handle SIGINT here; it's the only one that needs to be treated
+     specially (I think), since it's handled specially in {no,}jobs.c. */
+  code = setjmp (wait_intr_buf);
+  if (code)
+    {
+      status = 128 + wait_signal_received;
+      WAIT_RETURN (status);
+    }
+
+  /* We support jobs or pids.
+     wait <pid-or-job> [pid-or-job ...] */
+
+  /* But wait without any arguments means to wait for all of the shell's
+     currently active background processes. */
+  if (list == 0)
+    {
+      wait_for_background_pids ();
+      WAIT_RETURN (EXECUTION_SUCCESS);
+    }
+
+  status = EXECUTION_SUCCESS;
+  while (list)
+    {
+      pid_t pid;
+      char *w;
+      intmax_t pid_value;
+
+      w = list->word->word;
+      if (DIGIT (*w))
+	{
+	  if (legal_number (w, &pid_value) && pid_value == (pid_t)pid_value)
+	    {
+	      pid = (pid_t)pid_value;
+	      status = wait_for_single_pid (pid);
+	    }
+	  else
+	    {
+	      sh_badpid (w);
+	      WAIT_RETURN (EXECUTION_FAILURE);
+	    }
+	}
+#if defined (JOB_CONTROL)
+      else if (*w && *w == '%')
+	/* Must be a job spec.  Check it out. */
+	{
+	  int job;
+	  sigset_t set, oset;
+
+	  BLOCK_CHILD (set, oset);
+	  job = get_job_spec (list);
+
+	  if (INVALID_JOB (job))
+	    {
+	      if (job != DUP_JOB)
+		sh_badjob (list->word->word);
+	      UNBLOCK_CHILD (oset);
+	      status = 127;	/* As per Posix.2, section 4.70.2 */
+	      list = list->next;
+	      continue;
+	    }
+
+	  /* Job spec used.  Wait for the last pid in the pipeline. */
+	  UNBLOCK_CHILD (oset);
+	  status = wait_for_job (job);
+	}
+#endif /* JOB_CONTROL */
+      else
+	{
+	  sh_badpid (w);
+	  status = EXECUTION_FAILURE;
+	}
+      list = list->next;
+    }
+
+  WAIT_RETURN (status);
+}