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-rw-r--r--camel/ChangeLog5
-rw-r--r--camel/Makefile.am2
-rw-r--r--camel/camel-movemail.c252
-rw-r--r--camel/camel-movemail.h45
-rw-r--r--camel/camel.h1
5 files changed, 305 insertions, 0 deletions
diff --git a/camel/ChangeLog b/camel/ChangeLog
index 1d99752ea1..8859243025 100644
--- a/camel/ChangeLog
+++ b/camel/ChangeLog
@@ -1,3 +1,8 @@
+2000-04-09 Dan Winship <danw@helixcode.com>
+
+ * camel-movemail.c: New file with new function to dot-lock an mbox
+ file and copy it to a safe private directory.
+
2000-04-08 Christopher James Lahey <clahey@helixcode.com>
* providers/smtp/.cvsignore: Added a .cvsignore file.
diff --git a/camel/Makefile.am b/camel/Makefile.am
index eefc48bd10..16e180a392 100644
--- a/camel/Makefile.am
+++ b/camel/Makefile.am
@@ -49,6 +49,7 @@ libcamel_la_SOURCES = \
camel-mime-message.c \
camel-mime-part.c \
camel-mime-part-utils.c \
+ camel-movemail.c \
camel-multipart.c \
camel-op-queue.c \
camel-provider.c \
@@ -93,6 +94,7 @@ libcamelinclude_HEADERS = \
camel-mime-message.h \
camel-mime-part.h \
camel-mime-part-utils.h \
+ camel-movemail.h \
camel-multipart.h \
camel-op-queue.h \
camel-provider.h \
diff --git a/camel/camel-movemail.c b/camel/camel-movemail.c
new file mode 100644
index 0000000000..e15e26e7ae
--- /dev/null
+++ b/camel/camel-movemail.c
@@ -0,0 +1,252 @@
+/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
+/* camel-movemail.c: mbox copying function */
+
+/*
+ * Author:
+ * Dan Winship <danw@helixcode.com>
+ *
+ * Copyright 2000 Helix Code, Inc. (http://www.helixcode.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 Place, Suite 330, Boston, MA 02111-1307
+ * USA
+ */
+
+#include <config.h>
+
+#include <sys/stat.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <time.h>
+#include <unistd.h>
+
+#include "camel-movemail.h"
+#include "camel-exception.h"
+
+/**
+ * camel_movemail: Copy an mbox file from a shared spool directory to a
+ * new folder in a Camel store
+ * @source: source file
+ * @dest: destination file
+ * @ex: a CamelException
+ *
+ * This copies an mbox file from a shared directory with multiple
+ * readers and writers into a private (presumably Camel-controlled)
+ * directory. Dot locking is used on the source file (but not the
+ * destination).
+ *
+ * Return value: 1 if mail was copied, 0 if the source file contained
+ * no mail, -1 if an error occurred.
+ **/
+int
+camel_movemail (const char *source, const char *dest, CamelException *ex)
+{
+ gboolean locked, error;
+ int sfd, dfd, tmpfd;
+ char *locktmpfile, *lockfile;
+ struct stat st;
+ time_t now, timeout;
+ int nread, nwrote;
+ char buf[BUFSIZ];
+
+ camel_exception_clear (ex);
+
+ /* Stat and then open the spool file. If it doesn't exist or
+ * is empty, the user has no mail. (There's technically a race
+ * condition here in that an MDA might have just now locked it
+ * to deliver a message, but we don't care. In that case,
+ * assuming it's unlocked is equivalent to pretending we were
+ * called a fraction earlier.)
+ */
+ if (stat (source, &st) == -1) {
+ if (errno == ENOENT)
+ return 0;
+
+ camel_exception_setv (ex, CAMEL_EXCEPTION_SYSTEM,
+ "Could not check mail file %s: %s",
+ source, g_strerror (errno));
+ return -1;
+ }
+ if (st.st_size == 0)
+ return 0;
+
+ sfd = open (source, O_RDWR);
+ if (sfd == -1) {
+ camel_exception_setv (ex, CAMEL_EXCEPTION_SYSTEM,
+ "Could not open mail file %s: %s",
+ source, g_strerror (errno));
+ return -1;
+ }
+
+ dfd = open (dest, O_WRONLY | O_CREAT, S_IRUSR | S_IWUSR);
+ if (dfd == -1) {
+ camel_exception_setv (ex, CAMEL_EXCEPTION_SYSTEM,
+ "Could not open temporary mail "
+ "file %s: %s", dest, g_strerror (errno));
+ close (sfd);
+ return -1;
+ }
+
+ /* Create the unique lock file. */
+ locktmpfile = g_strdup_printf ("%s.lock.XXXXXX", source);
+#ifdef HAVE_MKSTEMP
+ tmpfd = mkstemp (locktmpfile);
+#else
+ if (mktemp (locktmpfile)) {
+ tmpfd = open (locktmpfile, O_RDWR | O_CREAT | O_EXCL,
+ S_IRUSR | S_IWUSR);
+ } else
+ tmpfd = -1;
+#endif
+ if (tmpfd == -1) {
+ camel_exception_setv (ex, CAMEL_EXCEPTION_SYSTEM,
+ "Could not create lock file "
+ "for %s: %s", source, g_strerror (errno));
+ close (sfd);
+ close (dfd);
+ unlink (dest);
+ return -1;
+ }
+ close (tmpfd);
+
+ lockfile = g_strdup_printf ("%s.lock", source);
+ locked = FALSE;
+ time (&timeout);
+ timeout += 30;
+
+ /* Loop trying to lock the file for 30 seconds. */
+ while (time (&now) < timeout) {
+ /* Try to make the lock. */
+ if (symlink (locktmpfile, lockfile) == 0) {
+ locked = TRUE;
+ break;
+ }
+
+ /* If we fail for a reason other than that someone
+ * else has the lock, then abort.
+ */
+ if (errno != EEXIST) {
+ camel_exception_setv (ex, CAMEL_EXCEPTION_SYSTEM,
+ "Could not create lock "
+ "file for %s: %s", source,
+ g_strerror (errno));
+ break;
+ }
+
+ /* Check the modtime on the lock file. */
+ if (stat (lockfile, &st) == -1) {
+ /* If the lockfile disappeared, try again. */
+ if (errno == ENOENT)
+ continue;
+
+ /* Some other error. Abort. */
+ camel_exception_setv (ex, CAMEL_EXCEPTION_SYSTEM,
+ "Could not test lock "
+ "file for %s: %s", source,
+ g_strerror (errno));
+ break;
+ }
+
+ /* If the lock file is stale, remove it and try again. */
+ if (st.st_mtime < now - 60) {
+ unlink (lockfile);
+ continue;
+ }
+
+ /* Otherwise, sleep and try again. */
+ sleep (5);
+ }
+
+ if (!locked) {
+ /* Something has gone awry. */
+ if (now >= timeout) {
+ camel_exception_setv (ex, CAMEL_EXCEPTION_SYSTEM,
+ "Timed out trying to get "
+ "lock file on %s. Try again "
+ "later.", source);
+ }
+ g_free (lockfile);
+ unlink (locktmpfile);
+ g_free (locktmpfile);
+ close (sfd);
+ close (dfd);
+ unlink (dest);
+ return -1;
+ }
+
+ /* OK. We have the file locked now. */
+
+ /* FIXME: Set a timer to keep the file locked. */
+
+ error = FALSE;
+ while (1) {
+ int written = 0;
+
+ nread = read (sfd, buf, sizeof (buf));
+ if (nread == 0)
+ break;
+ else if (nread == -1) {
+ camel_exception_setv (ex, CAMEL_EXCEPTION_SYSTEM,
+ "Error reading mail file: %s",
+ g_strerror (errno));
+ error = TRUE;
+ break;
+ }
+
+ while (nread) {
+ nwrote = write (dfd, buf + written, nread);
+ if (nwrote == -1) {
+ camel_exception_setv (ex, CAMEL_EXCEPTION_SYSTEM,
+ "Error writing "
+ "mail temp file: %s",
+ g_strerror (errno));
+ error = TRUE;
+ break;
+ }
+ written += nwrote;
+ nread -= nwrote;
+ }
+ }
+
+ /* If no errors occurred copying the data, and we successfully
+ * close the destination file, then truncate the source file.
+ * If there is some sort of error, delete the destination file.
+ */
+ if (!error) {
+ if (close (dfd) == 0)
+ ftruncate (sfd, 0);
+ else {
+ camel_exception_setv (ex, CAMEL_EXCEPTION_SYSTEM,
+ "Failed to store mail in "
+ "temp file %s: %s", dest,
+ g_strerror (errno));
+ unlink (dest);
+ error = TRUE;
+ }
+ } else {
+ close (dfd);
+ unlink (dest);
+ }
+ close (sfd);
+
+ /* Clean up lock files. */
+ unlink (lockfile);
+ g_free (lockfile);
+ unlink (locktmpfile);
+ g_free (locktmpfile);
+
+ return error ? -1 : 1;
+}
diff --git a/camel/camel-movemail.h b/camel/camel-movemail.h
new file mode 100644
index 0000000000..a4b20141ac
--- /dev/null
+++ b/camel/camel-movemail.h
@@ -0,0 +1,45 @@
+/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
+/* camel-movemail.h: mbox copy function */
+
+/*
+ * Author:
+ * Dan Winship <danw@helixcode.com>
+ *
+ * Copyright 2000 Helix Code, Inc. (http://www.helixcode.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 Place, Suite 330, Boston, MA 02111-1307
+ * USA
+ */
+
+
+#ifndef CAMEL_MOVEMAIL_H
+#define CAMEL_MOVEMAIL_H 1
+
+
+#ifdef __cplusplus
+extern "C" {
+#pragma }
+#endif /* __cplusplus }*/
+
+#include "camel-exception.h"
+
+int camel_movemail (const char *source, const char *dest, CamelException *ex);
+
+
+#ifdef __cplusplus
+}
+#endif /* __cplusplus */
+
+#endif /* CAMEL_MOVEMAIL_H */
diff --git a/camel/camel.h b/camel/camel.h
index a92d69e04d..0c9a045afb 100644
--- a/camel/camel.h
+++ b/camel/camel.h
@@ -46,6 +46,7 @@ extern "C" {
#include <camel/camel-mime-body-part.h>
#include <camel/camel-mime-message.h>
#include <camel/camel-mime-part.h>
+#include <camel/camel-movemail.h>
#include <camel/camel-multipart.h>
#include <camel/camel-op-queue.h>
#include <camel/camel-provider.h>
generated by cgit (git 2.34.1) at 2024-12-04 08:35:51 +0800