Updated to use the new API from a fe commits ago for the NSS stream. This

2003-03-03  Jeffrey Stedfast  <fejj@ximian.com>

	* camel-tcp-stream-openssl.c (camel_tcp_stream_ssl_new): Updated
	to use the new API from a fe commits ago for the NSS stream. This
	is just to make it compile, but does not update the behaviour to
	act like the NSS stream. Note that people shouldn't be using
	OpenSSL anyway.
	(camel_tcp_stream_ssl_new_raw): Same.

	* camel-process.[c,h]: New source file containing convenience
	functions for process creation/termination mainly for use with
	Pipe filters but should be usable for anything we want.

	* camel-io.[c,h]: New source files implementing read/write system
	calls with proper error checking and cancellation
	(ie. StreamFs::read/write and CamelTcpStreamRaw::read/write). No
	sense duplicating the same code over and over. Now I can use this
	same code easily in other i/o code (such as Pipe filters and gpg
	code?).

svn path=/trunk/; revision=20132

1 files changed, 153 insertions, 0 deletions

diff --git a/camel/camel-process.c b/camel/camel-process.c
new file mode 100644
index 0000000000..01c1e3be3d
--- /dev/null
+++ b/camel/camel-process.c
@@ -0,0 +1,153 @@
+/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
+/*
+ *  Authors: Jeffrey Stedfast <fejj@ximian.com>
+ *
+ *  Copyright 2003 Ximian, Inc. (www.ximian.com)
+ *
+ *  This program 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 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program 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 this program; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Street #330, Boston, MA 02111-1307, USA.
+ *
+ */
+
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <unistd.h>
+#include <fcntl.h>
+#include <errno.h>
+
+#include "camel-process.h"
+
+
+pid_t
+camel_process_fork (const char *path, char **argv, int *infd, int *outfd, int *errfd, CamelException *ex)
+{
+	int errnosav, fd[6], i;
+	pid_t pid;
+	
+	for (i = 0; i < 6; i++)
+		fds[i] = -1;
+	
+	for (i = 0; i < 6; i += 2) {
+		if (pipe (fd + i) == -1) {
+			errnosav = errno;
+			camel_exception_setv (ex, CAMEL_EXCEPTION_SYSTEM,
+					      _("Failed to create pipe to '%s': %s"),
+					      argv[0], strerror (errno));
+			
+			for (i = 0; i < 6; i++) {
+				if (fd[i] == -1)
+					break;
+				close (fd[i]);
+			}
+			
+			errno = errnosav;
+			
+			return -1;
+		}
+	}
+	
+	if (!(pid = fork ())) {
+		/* child process */
+		int maxfd, nullfd = -1;
+		
+		if (!outfd || !errfd)
+			nullfd = open ("/dev/null", O_WRONLY);
+		
+		if (dup2 (fd[0], STDIN_FILENO) == -1)
+			_exit (255);
+		
+		if (dup2 (outfd ? fd[3] : nullfd, STDOUT_FILENO) == -1)
+			_exit (255);
+		
+		if (dup2 (errfd ? fd[5] : nullfd, STDERR_FILENO) == -1)
+			_exit (255);
+		
+		setsid ();
+		
+		if ((maxfd = sysconf (_SC_OPEN_MAX)) > 0) {
+			for (i = 0; i < maxfd; i++) {
+				if (i != STDIN_FILENO && i != STDOUT_FILENO && i != STDERR_FILENO)
+					close (i);
+			}
+		}
+		
+		execv (path, argv);
+		_exit (255);
+	} else if (pid == -1) {
+		camel_exception_setv (ex, CAMEL_EXCEPTION_SYSTEM,
+				      _("Failed to create create child process '%s': %s"),
+				      argv[0], strerror (errno));
+		return -1;
+	}
+	
+	/* parent process */
+	close (fd[0]);
+	close (fd[3]);
+	close (fd[5]);
+	
+	if (infd)
+		*infd = fd[1];
+	else
+		close (fd[1]);
+	
+	if (outfd)
+		*outfd = fd[2];
+	else
+		close (fd[2]);
+	
+	if (errfd)
+		*errfd = fd[4];
+	else
+		close (fd[4]);
+	
+	return pid;
+}
+
+
+int
+camel_process_wait (pid_t pid)
+{
+	sigset_t mask, omask;
+	int status;
+	pid_t r;
+	
+	sigemptyset (&mask);
+	sigaddset (&mask, SIGALRM);
+	sigprocmask (SIG_BLOCK, &mask, &omask);
+	alarm (1);
+	
+	r = waitpid (pid, &status, 0);
+	
+	alarm (0);
+	sigprocmask (SIG_SETMASK, &omask, NULL);
+	
+	if (r == (pid_t) -1 && errno == EINTR) {
+		kill (pid, SIGTERM);
+		sleep (1);
+		r = waitpid (pid, &status, WNOHANG);
+		if (r == (pid_t) 0) {
+			kill (pid, SIGKILL);
+			sleep (1);
+			r = waitpid (pid, &status, WNOHANG);
+		}
+	}
+	
+	if (r != (pid_t) -1 && WIFEXITED (status))
+		return WEXITSTATUS (status);
+	else
+		return -1;
+}