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gkrellm/server/mail.c

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/* GKrellM
| Copyright (C) 1999-2010 Bill Wilson
|
| Author: Bill Wilson billw@gkrellm.net
| Latest versions might be found at: http://gkrellm.net
|
|
| GKrellM 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.
|
| GKrellM 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, see http://www.gnu.org/licenses/
|
|
| Additional permission under GNU GPL version 3 section 7
|
| If you modify this program, or any covered work, by linking or
| combining it with the OpenSSL project's OpenSSL library (or a
| modified version of that library), containing parts covered by
| the terms of the OpenSSL or SSLeay licenses, you are granted
| additional permission to convey the resulting work.
| Corresponding Source for a non-source form of such a combination
| shall include the source code for the parts of OpenSSL used as well
| as that of the covered work.
*/
#include "gkrellmd.h"
#include "gkrellmd-private.h"
#if !defined(WIN32)
#define MBOX_MBOX 0
#define MBOX_MAILDIR 1
#define MBOX_MH_DIR 2
typedef struct
{
gchar *path;
gchar *homedir_path;
gint mboxtype;
gboolean (*check_func)();
gint mail_count;
gint new_mail_count;
gint old_mail_count;
gint prev_mail_count,
prev_new_mail_count;
time_t last_mtime;
off_t last_size;
gboolean is_internal; /* Internal mail message (ie: localmachine) */
gboolean changed;
}
Mailbox;
static GList *mailbox_list;
static gint mail_check_timeout = 5; /* Seconds */
static gboolean unseen_is_new = TRUE; /* Accessed but unread */
static gboolean mail_need_serve;
/* Look at a From line to see if it is valid, lines look like:
| From sending_address dayofweek month dayofmonth timeofday year
| eg: From billw@gkrellm.net Fri Oct 22 13:52:49 2010
*/
static gint
is_From_line(Mailbox *mbox, gchar *buf)
{
gchar sender[512];
gint dayofmonth = 0;
if (strncmp(buf, "From ", 5))
return FALSE;
/* In case sending address missing, look for a day of month
| number in field 3 or 4 (0 based).
*/
sender[0] = '\0';
if (sscanf(buf, "%*s %*s %*s %d", &dayofmonth) != 1)
{
if (sscanf(buf, "%*s %511s %*s %*s %d", sender, &dayofmonth) != 2)
return FALSE;
}
if (dayofmonth < 1 || dayofmonth > 31)
return FALSE;
if (strcmp(sender, "MAILER-DAEMON") == 0)
mbox->is_internal = TRUE;
return TRUE;
}
/* Check if this is a Content-Type-line. If it contains a boundary
| field, copy boundary string to buffer (including two leading and
| trailing dashes marking the end of a multipart mail) and return
| true. Otherwise, return false.
*/
static gint
is_multipart_mail(gchar *buf, gchar *separator)
{
gchar *fieldstart;
gchar *sepstart;
gint seplen;
if (strncmp(buf, "Content-Type: ", 14) != 0)
return FALSE;
if (strncmp(&buf[14], "multipart/", 10) != 0)
return FALSE;
fieldstart = &buf[14];
while (*fieldstart!=0)
{
while (*fieldstart!=0 && *fieldstart!=';')
fieldstart++;
if (*fieldstart==';') fieldstart++;
while (*fieldstart!=0 && *fieldstart==' ')
fieldstart++;
if (strncmp(fieldstart, "boundary=", 9) == 0)
{
sepstart = fieldstart + 9;
if (sepstart[0]=='"')
{
sepstart++;
seplen = 0;
while (sepstart[seplen]!='"' && sepstart[seplen]>=32)
seplen++;
}
else
{
seplen = 0;
while (sepstart[seplen]!=';' && sepstart[seplen]>32)
seplen++;
}
strcpy(separator,"--");
strncpy(&separator[2],sepstart,seplen);
strcpy(&separator[seplen+2],"--");
return TRUE;
}
}
return FALSE;
}
static gboolean
mh_sequences_new_count(Mailbox *mbox)
{
FILE *f;
gchar buf[1024];
gchar *path, *tok;
gint n0, n1;
path = g_strconcat(mbox->path, G_DIR_SEPARATOR_S,
".mh_sequences", NULL);
f = fopen(path, "r");
g_free(path);
if (!f)
return FALSE;
while (fgets(buf, sizeof(buf), f))
{
/* Look for unseen sequence like "unseen: 4 7-9 23"
*/
if (strncmp(buf, "unseen:", 7))
continue;
tok = strtok(buf, " \t\n");
while ((tok = strtok(NULL, " \t\n")) != NULL)
{
if (sscanf(tok, "%d-%d", &n0, &n1) == 2)
mbox->new_mail_count += n1 - n0 + 1;
else
mbox->new_mail_count++;
}
break;
}
fclose(f);
return TRUE;
}
/* Sylpheed procmsg.h enums MSG_NEW as (1 << 0) and MSG_UNREAD as (1 << 1)
| And procmsg_write_flags() in Sylpheeds procmsg.c writes a mail record as
| a pair of ints with msgnum first followed by flags.
*/
#define SYLPHEED_MSG_NEW 1
#define SYLPHEED_MSG_UNREAD 2
#define SYLPHEED_MARK_VERSION 2
static gboolean
sylpheed_mark_new_count(Mailbox *mbox)
{
FILE *f;
gchar *path;
gint msgnum, flags, ver, mark_files = 0;
path = g_strconcat(mbox->path, G_DIR_SEPARATOR_S,
".sylpheed_mark", NULL);
f = fopen(path, "rb");
g_free(path);
if (!f)
return FALSE;
if ( fread(&ver, sizeof(ver), 1, f) == 1
&& SYLPHEED_MARK_VERSION == ver
)
{
while ( fread(&msgnum, sizeof(msgnum), 1, f) == 1
&& fread(&flags, sizeof(flags), 1, f) == 1
)
{
if ( (flags & SYLPHEED_MSG_NEW)
|| ((flags & SYLPHEED_MSG_UNREAD) && unseen_is_new)
)
mbox->new_mail_count += 1;
++mark_files;
}
if (mark_files < mbox->mail_count)
mbox->new_mail_count += mbox->mail_count - mark_files;
}
fclose(f);
return TRUE;
}
/* Check a mh directory for mail. The way that messages are marked as new
| depends on the MUA being using. Only .mh_sequences and .sylpheed_mark
| are currently checked, otherwise all mail found is considered new mail.
*/
static gboolean
check_mh_dir(Mailbox *mbox)
{
GDir *dir;
gchar *name;
mbox->mail_count = mbox->new_mail_count = 0;
if ((dir = g_dir_open(mbox->path, 0, NULL)) == NULL)
return FALSE;
while ((name = (gchar *) g_dir_read_name(dir)) != NULL)
{
/* Files starting with a digit are messages. */
if (isdigit((unsigned char)name[0]))
mbox->mail_count++;
}
g_dir_close(dir);
/* Some MH dir clients use .mh_sequences, others such as mutt or gnus
| do not. For mixed cases, it's a user option to ignore .mh_sequences.
| Sylpheed uses .sylpheed_mark.
*/
if ( !mh_sequences_new_count(mbox)
&& !sylpheed_mark_new_count(mbox)
)
mbox->new_mail_count = mbox->mail_count;
return TRUE;
}
/* A maildir has new, cur, and tmp subdirectories. Any file in new
| or cur that does not begin with a '.' is a mail message. It is
| suggested that messages begin with the output of time() (9 digits)
| but while mutt and qmail use this standard, procmail does not.
| maildir(5) says:
| It is a good idea for readers to skip all filenames in
| new and cur starting with a dot. Other than this,
| readers should not attempt to parse filenames.
| So check_maildir() simply looks for files in new and cur.
| But if unseen_is_new flag is set, look for ":2,*S" file suffix where
| the 'S' indicates the mail is seen.
| See http://cr.yp.to/proto/maildir.html
*/
static gboolean
check_maildir(Mailbox *mbox)
{
gchar path[256], *s;
gchar *name;
GDir *dir;
mbox->new_mail_count = 0;
snprintf(path, sizeof(path), "%s%cnew", mbox->path,
G_DIR_SEPARATOR);
if ((dir = g_dir_open(path, 0, NULL)) != NULL)
{
while ((name = (gchar *) g_dir_read_name(dir)) != NULL)
mbox->new_mail_count++;
g_dir_close(dir);
}
mbox->mail_count = mbox->new_mail_count;
snprintf(path, sizeof(path), "%s%ccur", mbox->path,
G_DIR_SEPARATOR);
if ((dir = g_dir_open(path, 0, NULL)) != NULL)
{
while ((name = (gchar *) g_dir_read_name(dir)) != NULL)
{
mbox->mail_count++;
if ( unseen_is_new
&& ( (s = strchr(name, ':')) == NULL
|| !strchr(s, 'S')
)
)
mbox->new_mail_count++;
}
g_dir_close(dir);
}
if (_GK.debug_level & DEBUG_MAIL)
g_print(_("mdir %s total=%d old=%d new=%d\n"), mbox->path,
mbox->mail_count, mbox->old_mail_count, mbox->new_mail_count);
return TRUE;
}
/* Count total mail and old mail in a mailbox. Old mail can be read
| with a Status: R0, or can be accessed and not read with Status: O
| So, new mail will be the diff - note that unread mail is not
| necessarily new mail. According to stat() man page:
| st_atime is changed by mknod(), utime(), read(), write(), truncate()
| st_mtime is changed by mknod(), utime(), write()
| But, new mail arriving (writing mailbox) sets st_mtime while reading
| the mailbox (mail program reading) sets st_atime. So the test
| st_atime > st_mtime is testing if mbox has been read since last new mail.
| Mail readers may restore st_mtime after writting status.
| And Netscape mail does status with X-Mozilla-Status: xxxS
| where S is bitwise or of status flags:
| 1: read 2: replied 4: marked 8: deleted
|
| Evolution uses status with X-Evolution: 00000000-xxxx where xxxx status is
| a bitfield in hexadecimal (see enum _CamelMessageFlags in evolution/camel
| source) and most importantly CAMEL_MESSAGE_SEEN = 1<<4.
*/
/* test if buf is a status for standard mail, mozilla or evolution
*/
static gboolean
is_status(gchar *buf)
{
if (buf[0] != 'S' && buf[0] != 'X')
return FALSE;
if ( !strncmp(buf, "Status:", 7) /* Standard mail clients */
|| !strncmp(buf, "X-Mozilla-Status:", 17) /* Netscape */
|| !strncmp(buf, "X-Evolution:", 12) /* Mozilla */
)
return TRUE;
else
return FALSE;
}
static gboolean
status_is_old(gchar *buf)
{
gchar c;
int tmp;
/* Standard mail clients
*/
if ( !strncmp(buf, "Status:", 7)
&& (strchr(buf, 'R') || (!unseen_is_new && strchr(buf, 'O')))
)
return TRUE;
/* Netscape
*/
if (!strncmp(buf, "X-Mozilla-Status:", 17))
{
c = buf[21];
if (c < '8') /* Not deleted */
c -= '0';
if (c >= '8' || (c & 0x1))
return TRUE;
}
/* Evolution
*/
if (!strncmp(buf, "X-Evolution:", 12))
{
sscanf(buf+22, "%04x", &tmp);
if (tmp & (1<<4))
return TRUE;
}
return FALSE;
}
/* test if a mail is marked as deleted
| Evolution uses status with X-Evolution: 00000000-xxxx where xxxx status is
| a bitfield in hexadecimal (see enum _CamelMessageFlags in evolution/camel source)
| and most importantly CAMEL_MESSAGE_DELETED = 1<<1.
*/
static gboolean
status_is_deleted(gchar *buf)
{
gint tmp;
/* Standard mail clients
if ( !strncmp(buf, "Status:", 7) )
*/
/* Netscape
if (!strncmp(buf, "X-Mozilla-Status:", 17))
*/
/* Evolution
*/
if (!strncmp(buf, "X-Evolution:", 12))
{
sscanf(buf+22, "%04x", &tmp);
if (tmp & (1<<1))
return TRUE;
/* Junk is not explicitly marked as deleted but is shown as if
| where in evolution
*/
if (tmp & (1<<7))
return TRUE;
}
return FALSE;
}
static gboolean
check_mbox(Mailbox *mbox)
{
FILE *f;
struct utimbuf ut;
struct stat s;
gchar buf[1024];
gchar mpart_sep[1024];
gint in_header = FALSE;
gint marked_read = FALSE;
gint is_multipart = FALSE;
if (stat(mbox->path, &s) != 0)
{
mbox->mail_count = mbox->old_mail_count = mbox->new_mail_count = 0;
mbox->last_mtime = 0;
mbox->last_size = 0;
gkrellm_debug(DEBUG_MAIL, "check_mbox can't stat(%s): %s\n",
mbox->path, g_strerror(errno));
return FALSE;
}
/* If the mailboxes have been modified since last check, count
| the new/total messages.
*/
if ( s.st_mtime != mbox->last_mtime
|| s.st_size != mbox->last_size
)
{
if ((f = fopen(mbox->path, "r")) == NULL)
{
gkrellm_debug(DEBUG_MAIL, "check_mbox can't fopen(%s): %s\n",
mbox->path, g_strerror(errno));
return FALSE;
}
mbox->mail_count = 0;
mbox->old_mail_count = 0;
while(fgets(buf, sizeof(buf), f))
{
if (is_multipart && !in_header)
{
/* Skip to last line of multipart mail */
if (strncmp(buf,mpart_sep,strlen(mpart_sep))==0)
is_multipart = FALSE;
}
else if (buf[0] == '\n')
{
in_header = FALSE;
mbox->is_internal = FALSE;
}
else if (is_From_line(mbox, buf))
{
mbox->mail_count += 1;
in_header = TRUE;
marked_read = FALSE;
}
else if (in_header && is_status(buf))
{
if (status_is_old(buf) && !marked_read)
{
mbox->old_mail_count += 1;
marked_read = TRUE;
}
if (status_is_deleted(buf))
{
if (marked_read)
mbox->old_mail_count -= 1;
mbox->mail_count -= 1;
}
}
else if (in_header && mbox->is_internal)
{
if (strncmp(buf, "From: Mail System Internal Data", 31) == 0)
{
in_header = FALSE;
mbox->mail_count -= 1;
mbox->is_internal = FALSE;
}
}
else if (in_header && is_multipart_mail(buf,mpart_sep))
{
is_multipart = TRUE;
}
}
fclose(f);
/* Restore the mbox stat times for other mail checking programs and
| so the (st_atime > st_mtime) animation override below will work.
*/
ut.actime = s.st_atime;
ut.modtime = s.st_mtime;
utime(mbox->path, &ut);
mbox->last_mtime = s.st_mtime;
mbox->last_size = s.st_size;
if (_GK.debug_level & DEBUG_MAIL)
g_print("mbox read <%s> total=%d old=%d\n",
mbox->path,
mbox->mail_count, mbox->old_mail_count);
}
/* If mbox has been accessed since last modify a MUA has probably read
| the mbox.
*/
mbox->new_mail_count = mbox->mail_count - mbox->old_mail_count;
if (s.st_atime > s.st_mtime)
{
mbox->prev_new_mail_count = mbox->new_mail_count;
}
return TRUE;
}
static void
update_mail(GkrellmdMonitor *mon, gboolean force)
{
Mailbox *mbox;
GList *list;
static gint second_count;
if ( (!GK.second_tick || (++second_count % mail_check_timeout) != 0)
&& !force
)
return;
for (list = mailbox_list; list; list = list->next)
{
mbox = (Mailbox *) list->data;
if (mbox->check_func)
(*mbox->check_func)(mbox);
if ( mbox->prev_mail_count != mbox->mail_count
|| mbox->prev_new_mail_count != mbox->new_mail_count
)
{
mbox->changed = TRUE;
mail_need_serve = TRUE;
gkrellmd_need_serve(mon);
}
mbox->prev_mail_count = mbox->mail_count;
mbox->prev_new_mail_count = mbox->new_mail_count;
}
}
static void
get_local_mboxtype(Mailbox *mbox)
{
gchar *path;
if (*(mbox->path) == '~')
{
mbox->homedir_path = mbox->path;
mbox->path = g_strdup_printf("%s%s", g_get_home_dir(),
mbox->homedir_path + 1);
}
if (g_file_test(mbox->path, G_FILE_TEST_IS_DIR))
{
#if GLIB_CHECK_VERSION(2,0,0)
path = g_build_path(G_DIR_SEPARATOR_S, mbox->path, "new", NULL);
#else
path = g_strconcat(mbox->path, G_DIR_SEPARATOR_S, "new", NULL);
#endif
if (g_file_test(path, G_FILE_TEST_IS_DIR))
mbox->mboxtype = MBOX_MAILDIR;
else
mbox->mboxtype = MBOX_MH_DIR;
g_free(path);
}
else
mbox->mboxtype = MBOX_MBOX;
}
void
gkrellmd_add_mailbox(gchar *path)
{
Mailbox *mbox;
if (!path || !*path)
return;
mbox = g_new0(Mailbox, 1);
mbox->path = g_strdup(path);
get_local_mboxtype(mbox);
if (mbox->mboxtype == MBOX_MAILDIR)
mbox->check_func = check_maildir;
else if (mbox->mboxtype == MBOX_MH_DIR)
mbox->check_func = check_mh_dir;
else
mbox->check_func = check_mbox;
mailbox_list = g_list_append(mailbox_list, mbox);
gkrellmd_add_serveflag_done(&mbox->changed);
}
/* ============================================================= */
static void
serve_mail_data(GkrellmdMonitor *mon, gboolean first_serve)
{
Mailbox *mbox;
GList *list;
gchar *line;
if ((!mail_need_serve && !first_serve) || !mailbox_list)
return;
gkrellmd_set_serve_name(mon, "mail");
for (list = mailbox_list; list; list = list->next)
{
mbox = (Mailbox *) list->data;
if (mbox->changed || first_serve)
{
line = g_strdup_printf("%s %d %d\n", mbox->homedir_path ?
mbox->homedir_path : mbox->path,
mbox->mail_count, mbox->new_mail_count);
gkrellmd_serve_data(mon, line);
g_free(line);
}
}
}
static void
serve_mail_setup(GkrellmdMonitor *mon)
{
GkrellmdClient *client = mon->privat->client;
GList *list;
Mailbox *mbox;
gchar *line;
gkrellmd_send_to_client(client, "<mail_setup>\n");
for (list = mailbox_list; list; list = list->next)
{
mbox = (Mailbox *) list->data;
line = g_strdup_printf("%s\n", mbox->homedir_path ?
mbox->homedir_path : mbox->path);
gkrellmd_send_to_client(client, line);
g_free(line);
}
}
static GkrellmdMonitor mail_monitor =
{
"mail",
update_mail,
serve_mail_data,
serve_mail_setup
};
GkrellmdMonitor *
gkrellmd_init_mail_monitor(void)
{
gkrellmd_add_serveflag_done(&mail_need_serve);
return &mail_monitor;
}
#else /* defined(WIN32) */
GkrellmdMonitor *
gkrellmd_init_mail_monitor(void)
{
return NULL;
}
void
gkrellmd_add_mailbox(gchar *path)
{
}
#endif
void
gkrellm_mail_local_unsupported(void)
{
/* WIN32 only calls this and it is taken care of by above #if */
}
#if GLIB_CHECK_VERSION(2,0,0)
GThread *
#else
gpointer
#endif
gkrellm_mail_get_active_thread(void)
{
return NULL;
}
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