From 772f20abb0a3a0979c440114bf3a1cff5b3cef03 Mon Sep 17 00:00:00 2001
From: cvpcs <root@cvpcs.org>
Date: Wed, 2 Jun 2010 11:02:31 -0500
Subject: initial import of bash 4.1

---
 builtins/wait.def | 186 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 186 insertions(+)
 create mode 100644 builtins/wait.def

(limited to 'builtins/wait.def')

diff --git a/builtins/wait.def b/builtins/wait.def
new file mode 100644
index 0000000..0206926
--- /dev/null
+++ b/builtins/wait.def
@@ -0,0 +1,186 @@
+This file is wait.def, from which is created wait.c.
+It implements the builtin "wait" in Bash.
+
+Copyright (C) 1987-2009 Free Software Foundation, Inc.
+
+This file is part of GNU Bash, the Bourne Again SHell.
+
+Bash is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+Bash is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with Bash.  If not, see <http://www.gnu.org/licenses/>.
+
+$BUILTIN wait
+$FUNCTION wait_builtin
+$DEPENDS_ON JOB_CONTROL
+$PRODUCES wait.c
+$SHORT_DOC wait [id]
+Wait for job completion and return exit status.
+
+Waits for the process identified by ID, which may be a process ID or a
+job specification, and reports its termination status.  If ID is not
+given, waits for all currently active child processes, and the return
+status is zero.  If ID is a a job specification, waits for all processes
+in the job's pipeline.
+
+Exit Status:
+Returns the status of ID; fails if ID is invalid or an invalid option is
+given.
+$END
+
+$BUILTIN wait
+$FUNCTION wait_builtin
+$DEPENDS_ON !JOB_CONTROL
+$SHORT_DOC wait [pid]
+Wait for process completion and return exit status.
+
+Waits for the specified process and reports its termination status.  If
+PID is not given, all currently active child processes are waited for,
+and the return code is zero.  PID must be a process ID.
+
+Exit Status:
+Returns the status of ID; fails if ID is invalid or an invalid option is
+given.
+$END
+
+#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);
+}
-- 
cgit v1.1

