1 /* $OpenBSD: diffdir.c,v 1.45 2015/10/05 20:15:00 millert Exp $ */
4 * Copyright (c) 2003, 2010 Todd C. Miller <Todd.Miller@courtesan.com>
6 * Permission to use, copy, modify, and distribute this software for any
7 * purpose with or without fee is hereby granted, provided that the above
8 * copyright notice and this permission notice appear in all copies.
10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
18 * Sponsored in part by the Defense Advanced Research Projects
19 * Agency (DARPA) and Air Force Research Laboratory, Air Force
20 * Materiel Command, USAF, under agreement number F39502-99-1-0512.
23 #include <sys/cdefs.h>
38 static int selectfile(const struct dirent *);
39 static void diffit(struct dirent *, char *, size_t, struct dirent *,
41 static void print_only(const char *, size_t, const char *);
43 #define d_status d_type /* we need to store status for -l */
46 * Diff directory traversal. Will be called recursively if -r was specified.
49 diffdir(char *p1, char *p2, int flags)
51 struct dirent *dent1, **dp1, **edp1, **dirp1 = NULL;
52 struct dirent *dent2, **dp2, **edp2, **dirp2 = NULL;
53 size_t dirlen1, dirlen2;
54 char path1[PATH_MAX], path2[PATH_MAX];
59 dirlen1 = strlcpy(path1, *p1 ? p1 : ".", sizeof(path1));
60 if (dirlen1 >= sizeof(path1) - 1) {
61 warnc(ENAMETOOLONG, "%s", p1);
65 if (path1[dirlen1 - 1] != '/') {
66 path1[dirlen1++] = '/';
67 path1[dirlen1] = '\0';
69 dirlen2 = strlcpy(path2, *p2 ? p2 : ".", sizeof(path2));
70 if (dirlen2 >= sizeof(path2) - 1) {
71 warnc(ENAMETOOLONG, "%s", p2);
75 if (path2[dirlen2 - 1] != '/') {
76 path2[dirlen2++] = '/';
77 path2[dirlen2] = '\0';
81 * Get a list of entries in each directory, skipping "excluded" files
82 * and sorting alphabetically.
84 pos = scandir(path1, &dirp1, selectfile, alphasort);
86 if (errno == ENOENT && (Nflag || Pflag)) {
96 pos = scandir(path2, &dirp2, selectfile, alphasort);
98 if (errno == ENOENT && Nflag) {
109 * If we were given a starting point, find it.
112 while (dp1 != edp1 && strcmp((*dp1)->d_name, start) < 0)
114 while (dp2 != edp2 && strcmp((*dp2)->d_name, start) < 0)
119 * Iterate through the two directory lists, diffing as we go.
121 while (dp1 != edp1 || dp2 != edp2) {
122 dent1 = dp1 != edp1 ? *dp1 : NULL;
123 dent2 = dp2 != edp2 ? *dp2 : NULL;
125 pos = dent1 == NULL ? 1 : dent2 == NULL ? -1 :
126 ignore_file_case ? strcasecmp(dent1->d_name, dent2->d_name) :
127 strcmp(dent1->d_name, dent2->d_name) ;
129 /* file exists in both dirs, diff it */
130 diffit(dent1, path1, dirlen1, dent2, path2, dirlen2, flags);
133 } else if (pos < 0) {
134 /* file only in first dir, only diff if -N */
136 diffit(dent1, path1, dirlen1, dent2, path2,
139 print_only(path1, dirlen1, dent1->d_name);
144 /* file only in second dir, only diff if -N or -P */
146 diffit(dent2, path1, dirlen1, dent1, path2,
149 print_only(path2, dirlen2, dent2->d_name);
158 for (dp1 = dirp1; dp1 < edp1; dp1++)
163 for (dp2 = dirp2; dp2 < edp2; dp2++)
170 * Do the actual diff by calling either diffreg() or diffdir().
173 diffit(struct dirent *dp, char *path1, size_t plen1, struct dirent *dp2,
174 char *path2, size_t plen2, int flags)
177 strlcpy(path1 + plen1, dp->d_name, PATH_MAX - plen1);
180 * If we are ignoring file case, use dent2s name here if both names are
181 * the same apart from case.
183 if (ignore_file_case && strcasecmp(dp2->d_name, dp2->d_name) == 0)
184 strlcpy(path2 + plen2, dp2->d_name, PATH_MAX - plen2);
186 strlcpy(path2 + plen2, dp->d_name, PATH_MAX - plen2);
189 if (lstat(path1, &stb1) != 0) {
190 if (!(Nflag || Pflag) || errno != ENOENT) {
195 memset(&stb1, 0, sizeof(stb1));
198 if (lstat(path2, &stb2) != 0) {
199 if (!Nflag || errno != ENOENT) {
204 memset(&stb2, 0, sizeof(stb2));
205 stb2.st_mode = stb1.st_mode;
207 if (stb1.st_mode == 0)
208 stb1.st_mode = stb2.st_mode;
209 if (S_ISLNK(stb1.st_mode) || S_ISLNK(stb2.st_mode)) {
210 if (S_ISLNK(stb1.st_mode) && S_ISLNK(stb2.st_mode)) {
216 len1 = readlink(path1, buf1, sizeof(buf1));
217 len2 = readlink(path2, buf2, sizeof(buf2));
219 if (len1 < 0 || len2 < 0) {
220 perror("reading links");
226 if (len1 != len2 || strncmp(buf1, buf2, len1) != 0) {
227 printf("Symbolic links %s and %s differ\n",
235 printf("File %s is a %s while file %s is a %s\n",
236 path1, S_ISLNK(stb1.st_mode) ? "symbolic link" :
237 (S_ISDIR(stb1.st_mode) ? "directory" :
238 (S_ISREG(stb1.st_mode) ? "file" : "error")),
239 path2, S_ISLNK(stb2.st_mode) ? "symbolic link" :
240 (S_ISDIR(stb2.st_mode) ? "directory" :
241 (S_ISREG(stb2.st_mode) ? "file" : "error")));
246 if (stat(path1, &stb1) != 0) {
247 if (!(Nflag || Pflag) || errno != ENOENT) {
252 memset(&stb1, 0, sizeof(stb1));
255 if (stat(path2, &stb2) != 0) {
256 if (!Nflag || errno != ENOENT) {
261 memset(&stb2, 0, sizeof(stb2));
262 stb2.st_mode = stb1.st_mode;
264 if (stb1.st_mode == 0)
265 stb1.st_mode = stb2.st_mode;
267 if (S_ISDIR(stb1.st_mode) && S_ISDIR(stb2.st_mode)) {
269 diffdir(path1, path2, flags);
271 printf("Common subdirectories: %s and %s\n",
275 if (!S_ISREG(stb1.st_mode) && !S_ISDIR(stb1.st_mode))
276 dp->d_status = D_SKIPPED1;
277 else if (!S_ISREG(stb2.st_mode) && !S_ISDIR(stb2.st_mode))
278 dp->d_status = D_SKIPPED2;
280 dp->d_status = diffreg(path1, path2, flags, 0);
281 print_status(dp->d_status, path1, path2, "");
285 * Returns 1 if the directory entry should be included in the
286 * diff, else 0. Checks the excludes list.
289 selectfile(const struct dirent *dp)
291 struct excludes *excl;
293 if (dp->d_fileno == 0)
296 /* always skip "." and ".." */
297 if (dp->d_name[0] == '.' && (dp->d_name[1] == '\0' ||
298 (dp->d_name[1] == '.' && dp->d_name[2] == '\0')))
301 /* check excludes list */
302 for (excl = excludes_list; excl != NULL; excl = excl->next)
303 if (fnmatch(excl->pattern, dp->d_name, FNM_PATHNAME) == 0)
310 print_only(const char *path, size_t dirlen, const char *entry)
314 printf("Only in %.*s: %s\n", (int)dirlen, path, entry);