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/* mailstat.c -- stat a mailbox file, handling maildir-type mail directories */
/* Copyright (C) 2001 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/>.
*/
#include <config.h>
#include <stdio.h>
#include <errno.h>
#include <bashtypes.h>
#include <posixstat.h>
#include <posixdir.h>
#include <bashansi.h>
#if defined (HAVE_SYS_PARAM_H)
# include <sys/param.h>
#endif
#include <maxpath.h>
/*
* Stat a file. If it's a maildir, check all messages
* in the maildir and present the grand total as a file.
* The fields in the 'struct stat' are from the mail directory.
* The following fields are emulated:
*
* st_nlink always 1, unless st_blocks is not present, in which case it's
* the total number of messages
* st_size total number of bytes in all files
* st_blocks total number of messages, if present in struct stat
* st_atime access time of newest file in maildir
* st_mtime modify time of newest file in maildir
* st_mode S_IFDIR changed to S_IFREG
*
* This is good enough for most mail-checking applications.
*/
int
mailstat(path, st)
const char *path;
struct stat *st;
{
static struct stat st_new_last, st_ret_last;
struct stat st_ret, st_tmp;
DIR *dd;
struct dirent *fn;
char dir[PATH_MAX * 2], file[PATH_MAX * 2 + 1];
int i, l;
time_t atime, mtime;
atime = mtime = 0;
/* First see if it's a directory. */
if ((i = stat(path, st)) != 0 || S_ISDIR(st->st_mode) == 0)
return i;
if (strlen(path) > sizeof(dir) - 5)
{
#ifdef ENAMETOOLONG
errno = ENAMETOOLONG;
#else
errno = EINVAL;
#endif
return -1;
}
st_ret = *st;
st_ret.st_nlink = 1;
st_ret.st_size = 0;
#ifdef HAVE_STRUCT_STAT_ST_BLOCKS
st_ret.st_blocks = 0;
#else
st_ret.st_nlink = 0;
#endif
st_ret.st_mode &= ~S_IFDIR;
st_ret.st_mode |= S_IFREG;
/* See if cur/ is present */
sprintf(dir, "%s/cur", path);
if (stat(dir, &st_tmp) || S_ISDIR(st_tmp.st_mode) == 0)
return 0;
st_ret.st_atime = st_tmp.st_atime;
/* See if tmp/ is present */
sprintf(dir, "%s/tmp", path);
if (stat(dir, &st_tmp) || S_ISDIR(st_tmp.st_mode) == 0)
return 0;
st_ret.st_mtime = st_tmp.st_mtime;
/* And new/ */
sprintf(dir, "%s/new", path);
if (stat(dir, &st_tmp) || S_ISDIR(st_tmp.st_mode) == 0)
return 0;
st_ret.st_mtime = st_tmp.st_mtime;
/* Optimization - if new/ didn't change, nothing else did. */
if (st_tmp.st_dev == st_new_last.st_dev &&
st_tmp.st_ino == st_new_last.st_ino &&
st_tmp.st_atime == st_new_last.st_atime &&
st_tmp.st_mtime == st_new_last.st_mtime)
{
*st = st_ret_last;
return 0;
}
st_new_last = st_tmp;
/* Loop over new/ and cur/ */
for (i = 0; i < 2; i++)
{
sprintf(dir, "%s/%s", path, i ? "cur" : "new");
sprintf(file, "%s/", dir);
l = strlen(file);
if ((dd = opendir(dir)) == NULL)
return 0;
while ((fn = readdir(dd)) != NULL)
{
if (fn->d_name[0] == '.' || strlen(fn->d_name) + l >= sizeof(file))
continue;
strcpy(file + l, fn->d_name);
if (stat(file, &st_tmp) != 0)
continue;
st_ret.st_size += st_tmp.st_size;
#ifdef HAVE_STRUCT_STAT_ST_BLOCKS
st_ret.st_blocks++;
#else
st_ret.st_nlink++;
#endif
if (st_tmp.st_atime != st_tmp.st_mtime && st_tmp.st_atime > atime)
atime = st_tmp.st_atime;
if (st_tmp.st_mtime > mtime)
mtime = st_tmp.st_mtime;
}
closedir(dd);
}
/* if (atime) */ /* Set atime even if cur/ is empty */
st_ret.st_atime = atime;
if (mtime)
st_ret.st_mtime = mtime;
*st = st_ret_last = st_ret;
return 0;
}
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