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mailstat.c

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1/* mailstat.c -- stat a mailbox file, handling maildir-type mail directories */-
2-
3/* Copyright (C) 2001 Free Software Foundation, Inc.-
4-
5 This file is part of GNU Bash, the Bourne Again SHell.-
6-
7 Bash is free software: you can redistribute it and/or modify-
8 it under the terms of the GNU General Public License as published by-
9 the Free Software Foundation, either version 3 of the License, or-
10 (at your option) any later version.-
11-
12 Bash is distributed in the hope that it will be useful,-
13 but WITHOUT ANY WARRANTY; without even the implied warranty of-
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the-
15 GNU General Public License for more details.-
16-
17 You should have received a copy of the GNU General Public License-
18 along with Bash. If not, see <http://www.gnu.org/licenses/>.-
19*/-
20-
21#include <config.h>-
22 -
23#include <stdio.h>-
24#include <errno.h>-
25-
26#include <bashtypes.h>-
27#include <posixstat.h>-
28#include <posixdir.h>-
29#include <bashansi.h>-
30-
31#if defined (HAVE_SYS_PARAM_H)-
32# include <sys/param.h>-
33#endif-
34-
35#include <maxpath.h>-
36-
37/*-
38 * Stat a file. If it's a maildir, check all messages-
39 * in the maildir and present the grand total as a file.-
40 * The fields in the 'struct stat' are from the mail directory.-
41 * The following fields are emulated:-
42 *-
43 * st_nlink always 1, unless st_blocks is not present, in which case it's-
44 * the total number of messages-
45 * st_size total number of bytes in all files-
46 * st_blocks total number of messages, if present in struct stat-
47 * st_atime access time of newest file in maildir-
48 * st_mtime modify time of newest file in maildir-
49 * st_mode S_IFDIR changed to S_IFREG-
50 *-
51 * This is good enough for most mail-checking applications.-
52 */-
53-
54int-
55mailstat(path, st)-
56 const char *path;-
57 struct stat *st;-
58{-
59 static struct stat st_new_last, st_ret_last;-
60 struct stat st_ret, st_tmp;-
61 DIR *dd;-
62 struct dirent *fn;-
63 char dir[PATH_MAX * 2], file[PATH_MAX * 2];-
64 int i, l;-
65 time_t atime, mtime;-
66-
67 atime = mtime = 0;-
68-
69 /* First see if it's a directory. */-
70 if ((i = stat(path, st)) != 0 || S_ISDIR(st->st_mode) == 0)
(i = stat(path, st)) != 0Description
TRUEnever evaluated
FALSEnever evaluated
(((( st->st_mo...0040000)) == 0Description
TRUEnever evaluated
FALSEnever evaluated
0
71 return i;
never executed: return i;
0
72-
73 if (strlen(path) > sizeof(dir) - 5)
strlen(path) > sizeof(dir) - 5Description
TRUEnever evaluated
FALSEnever evaluated
0
74 {-
75#ifdef ENAMETOOLONG-
76 errno = ENAMETOOLONG;-
77#else-
78 errno = EINVAL;-
79#endif-
80 return -1;
never executed: return -1;
0
81 }-
82-
83 st_ret = *st;-
84 st_ret.st_nlink = 1;-
85 st_ret.st_size = 0;-
86#ifdef HAVE_STRUCT_STAT_ST_BLOCKS-
87 st_ret.st_blocks = 0;-
88#else-
89 st_ret.st_nlink = 0;-
90#endif-
91 st_ret.st_mode &= ~S_IFDIR;-
92 st_ret.st_mode |= S_IFREG;-
93-
94 /* See if cur/ is present */-
95 sprintf(dir, "%s/cur", path);-
96 if (stat(dir, &st_tmp) || S_ISDIR(st_tmp.st_mode) == 0)
stat(dir, &st_tmp)Description
TRUEnever evaluated
FALSEnever evaluated
(((( st_tmp.st...0040000)) == 0Description
TRUEnever evaluated
FALSEnever evaluated
0
97 return 0;
never executed: return 0;
0
98 st_ret.st_atime = st_tmp.st_atime;-
99-
100 /* See if tmp/ is present */-
101 sprintf(dir, "%s/tmp", path);-
102 if (stat(dir, &st_tmp) || S_ISDIR(st_tmp.st_mode) == 0)
stat(dir, &st_tmp)Description
TRUEnever evaluated
FALSEnever evaluated
(((( st_tmp.st...0040000)) == 0Description
TRUEnever evaluated
FALSEnever evaluated
0
103 return 0;
never executed: return 0;
0
104 st_ret.st_mtime = st_tmp.st_mtime;-
105-
106 /* And new/ */-
107 sprintf(dir, "%s/new", path);-
108 if (stat(dir, &st_tmp) || S_ISDIR(st_tmp.st_mode) == 0)
stat(dir, &st_tmp)Description
TRUEnever evaluated
FALSEnever evaluated
(((( st_tmp.st...0040000)) == 0Description
TRUEnever evaluated
FALSEnever evaluated
0
109 return 0;
never executed: return 0;
0
110 st_ret.st_mtime = st_tmp.st_mtime;-
111-
112 /* Optimization - if new/ didn't change, nothing else did. */-
113 if (st_tmp.st_dev == st_new_last.st_dev &&
st_tmp.st_dev ...ew_last.st_devDescription
TRUEnever evaluated
FALSEnever evaluated
0
114 st_tmp.st_ino == st_new_last.st_ino &&
st_tmp.st_ino ...ew_last.st_inoDescription
TRUEnever evaluated
FALSEnever evaluated
0
115 st_tmp.st_atime == st_new_last.st_atime &&
st_tmp. st_ati...st_atim.tv_secDescription
TRUEnever evaluated
FALSEnever evaluated
0
116 st_tmp.st_mtime == st_new_last.st_mtime)
st_tmp. st_mti...st_mtim.tv_secDescription
TRUEnever evaluated
FALSEnever evaluated
0
117 {-
118 *st = st_ret_last;-
119 return 0;
never executed: return 0;
0
120 }-
121 st_new_last = st_tmp;-
122-
123 /* Loop over new/ and cur/ */-
124 for (i = 0; i < 2; i++)
i < 2Description
TRUEnever evaluated
FALSEnever evaluated
0
125 {-
126 sprintf(dir, "%s/%s", path, i ? "cur" : "new");-
127 sprintf(file, "%s/", dir);-
128 l = strlen(file);-
129 if ((dd = opendir(dir)) == NULL)
(dd = opendir(...== ((void *)0)Description
TRUEnever evaluated
FALSEnever evaluated
0
130 return 0;
never executed: return 0;
0
131 while ((fn = readdir(dd)) != NULL)
(fn = readdir(...!= ((void *)0)Description
TRUEnever evaluated
FALSEnever evaluated
0
132 {-
133 if (fn->d_name[0] == '.' || strlen(fn->d_name) + l >= sizeof(file))
fn->d_name[0] == '.'Description
TRUEnever evaluated
FALSEnever evaluated
strlen(fn->d_n...= sizeof(file)Description
TRUEnever evaluated
FALSEnever evaluated
0
134 continue;
never executed: continue;
0
135 strcpy(file + l, fn->d_name);-
136 if (stat(file, &st_tmp) != 0)
stat(file, &st_tmp) != 0Description
TRUEnever evaluated
FALSEnever evaluated
0
137 continue;
never executed: continue;
0
138 st_ret.st_size += st_tmp.st_size;-
139#ifdef HAVE_STRUCT_STAT_ST_BLOCKS-
140 st_ret.st_blocks++;-
141#else-
142 st_ret.st_nlink++;-
143#endif-
144 if (st_tmp.st_atime != st_tmp.st_mtime && st_tmp.st_atime > atime)
st_tmp. st_ati...st_mtim.tv_secDescription
TRUEnever evaluated
FALSEnever evaluated
st_tmp. st_atim.tv_sec > atimeDescription
TRUEnever evaluated
FALSEnever evaluated
0
145 atime = st_tmp.st_atime;
never executed: atime = st_tmp. st_atim.tv_sec ;
0
146 if (st_tmp.st_mtime > mtime)
st_tmp. st_mtim.tv_sec > mtimeDescription
TRUEnever evaluated
FALSEnever evaluated
0
147 mtime = st_tmp.st_mtime;
never executed: mtime = st_tmp. st_mtim.tv_sec ;
0
148 }
never executed: end of block
0
149 closedir(dd);-
150 }
never executed: end of block
0
151-
152/* if (atime) */ /* Set atime even if cur/ is empty */-
153 st_ret.st_atime = atime;-
154 if (mtime)
mtimeDescription
TRUEnever evaluated
FALSEnever evaluated
0
155 st_ret.st_mtime = mtime;
never executed: st_ret. st_mtim.tv_sec = mtime;
0
156-
157 *st = st_ret_last = st_ret;-
158 return 0;
never executed: return 0;
0
159}-
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