1 /*************************************************
2 * Exim - an Internet mail transport agent *
3 *************************************************/
5 /* Copyright (c) University of Cambridge 1995 - 2015 */
6 /* See the file NOTICE for conditions of use and distribution. */
8 /* The idea for this code came from Matthew Byng-Maddick, but his original has
9 been heavily reworked a lot for Exim 4 (and it now uses stat() (more precisely:
10 lstat()) rather than a directory scan). */
14 #include "lf_functions.h"
18 /*************************************************
20 *************************************************/
22 /* See local README for interface description. We open the directory to test
23 whether it exists and whether it is searchable. However, we don't need to keep
24 it open, because the "search" can be done by a call to lstat() rather than
25 actually scanning through the list of files. */
28 dsearch_open(const uschar * dirname, uschar ** errmsg)
30 DIR * dp = exim_opendir(dirname);
33 int save_errno = errno;
34 *errmsg = string_open_failed(errno, "%s for directory search", dirname);
43 /*************************************************
45 *************************************************/
47 /* The handle will always be (void *)(-1), but don't try casting it to an
48 integer as this gives warnings on 64-bit systems. */
51 dsearch_check(void * handle, const uschar * filename, int modemask,
52 uid_t * owners, gid_t * owngroups, uschar ** errmsg)
56 return lf_check_file(-1, filename, S_IFDIR, modemask, owners, owngroups,
57 "dsearch", errmsg) == 0;
58 *errmsg = string_sprintf("dirname '%s' for dsearch is not absolute", filename);
63 /*************************************************
65 *************************************************/
67 /* See local README for interface description. We use lstat() instead of
68 scanning the directory, as it is hopefully faster to let the OS do the scanning
72 dsearch_find(void * handle, const uschar * dirname, const uschar * keystring,
73 int length, uschar ** result, uschar ** errmsg, uint * do_cache,
80 handle = handle; /* Keep picky compilers happy */
84 if (Ustrchr(keystring, '/') != 0)
86 *errmsg = string_sprintf("key for dsearch lookup contains a slash: %s",
91 filename = string_sprintf("%s/%s", dirname, keystring);
92 if (Ulstat(filename, &statbuf) >= 0)
94 /* Since the filename exists in the filesystem, we can return a
95 non-tainted result. */
96 *result = string_copy_taint(keystring, FALSE);
100 if (errno == ENOENT) return FAIL;
103 *errmsg = string_sprintf("%s: lstat failed", filename);
109 /*************************************************
110 * Close entry point *
111 *************************************************/
113 /* See local README for interface description */
116 static dsearch_close(void *handle)
118 handle = handle; /* Avoid compiler warning */
122 /*************************************************
123 * Version reporting entry point *
124 *************************************************/
126 /* See local README for interface description. */
128 #include "../version.h"
131 dsearch_version_report(FILE *f)
134 fprintf(f, "Library version: dsearch: Exim version %s\n", EXIM_VERSION_STR);
139 static lookup_info _lookup_info = {
140 US"dsearch", /* lookup name */
141 lookup_absfile, /* uses absolute file name */
142 dsearch_open, /* open function */
143 dsearch_check, /* check function */
144 dsearch_find, /* find function */
145 dsearch_close, /* close function */
146 NULL, /* no tidy function */
147 NULL, /* no quoting function */
148 dsearch_version_report /* version reporting */
152 #define dsearch_lookup_module_info _lookup_module_info
155 static lookup_info *_lookup_list[] = { &_lookup_info };
156 lookup_module_info dsearch_lookup_module_info = { LOOKUP_MODULE_INFO_MAGIC, _lookup_list, 1 };
158 /* End of lookups/dsearch.c */