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>
24 __FBSDID("$FreeBSD$");
39 static int selectfile(const struct dirent *);
40 static void diffit(struct dirent *, char *, size_t, char *, size_t, int);
42 #define d_status d_type /* we need to store status for -l */
45 * Diff directory traversal. Will be called recursively if -r was specified.
48 diffdir(char *p1, char *p2, int flags)
50 struct dirent *dent1, **dp1, **edp1, **dirp1 = NULL;
51 struct dirent *dent2, **dp2, **edp2, **dirp2 = NULL;
52 size_t dirlen1, dirlen2;
53 char path1[PATH_MAX], path2[PATH_MAX];
58 dirlen1 = strlcpy(path1, *p1 ? p1 : ".", sizeof(path1));
59 if (dirlen1 >= sizeof(path1) - 1) {
60 warnc(ENAMETOOLONG, "%s", p1);
64 if (path1[dirlen1 - 1] != '/') {
65 path1[dirlen1++] = '/';
66 path1[dirlen1] = '\0';
68 dirlen2 = strlcpy(path2, *p2 ? p2 : ".", sizeof(path2));
69 if (dirlen2 >= sizeof(path2) - 1) {
70 warnc(ENAMETOOLONG, "%s", p2);
74 if (path2[dirlen2 - 1] != '/') {
75 path2[dirlen2++] = '/';
76 path2[dirlen2] = '\0';
80 * Get a list of entries in each directory, skipping "excluded" files
81 * and sorting alphabetically.
83 pos = scandir(path1, &dirp1, selectfile, alphasort);
85 if (errno == ENOENT && (Nflag || Pflag)) {
95 pos = scandir(path2, &dirp2, selectfile, alphasort);
97 if (errno == ENOENT && Nflag) {
108 * If we were given a starting point, find it.
111 while (dp1 != edp1 && strcmp((*dp1)->d_name, start) < 0)
113 while (dp2 != edp2 && strcmp((*dp2)->d_name, start) < 0)
118 * Iterate through the two directory lists, diffing as we go.
120 while (dp1 != edp1 || dp2 != edp2) {
121 dent1 = dp1 != edp1 ? *dp1 : NULL;
122 dent2 = dp2 != edp2 ? *dp2 : NULL;
124 pos = dent1 == NULL ? 1 : dent2 == NULL ? -1 :
125 ignore_file_case ? strcasecmp(dent1->d_name, dent2->d_name) :
126 strcmp(dent1->d_name, dent2->d_name) ;
128 /* file exists in both dirs, diff it */
129 diffit(dent1, path1, dirlen1, path2, dirlen2, flags);
132 } else if (pos < 0) {
133 /* file only in first dir, only diff if -N */
135 diffit(dent1, path1, dirlen1, path2, dirlen2,
138 print_only(path1, dirlen1, dent1->d_name);
143 /* file only in second dir, only diff if -N or -P */
145 diffit(dent2, path1, dirlen1, path2, dirlen2,
148 print_only(path2, dirlen2, dent2->d_name);
157 for (dp1 = dirp1; dp1 < edp1; dp1++)
162 for (dp2 = dirp2; dp2 < edp2; dp2++)
169 * Do the actual diff by calling either diffreg() or diffdir().
172 diffit(struct dirent *dp, char *path1, size_t plen1, char *path2, size_t plen2,
176 strlcpy(path1 + plen1, dp->d_name, PATH_MAX - plen1);
177 if (stat(path1, &stb1) != 0) {
178 if (!(Nflag || Pflag) || errno != ENOENT) {
183 memset(&stb1, 0, sizeof(stb1));
186 strlcpy(path2 + plen2, dp->d_name, PATH_MAX - plen2);
187 if (stat(path2, &stb2) != 0) {
188 if (!Nflag || errno != ENOENT) {
193 memset(&stb2, 0, sizeof(stb2));
194 stb2.st_mode = stb1.st_mode;
196 if (stb1.st_mode == 0)
197 stb1.st_mode = stb2.st_mode;
199 if (S_ISDIR(stb1.st_mode) && S_ISDIR(stb2.st_mode)) {
201 diffdir(path1, path2, flags);
203 printf("Common subdirectories: %s and %s\n",
207 if (!S_ISREG(stb1.st_mode) && !S_ISDIR(stb1.st_mode))
208 dp->d_status = D_SKIPPED1;
209 else if (!S_ISREG(stb2.st_mode) && !S_ISDIR(stb2.st_mode))
210 dp->d_status = D_SKIPPED2;
212 dp->d_status = diffreg(path1, path2, flags, 0);
213 print_status(dp->d_status, path1, path2, "");
217 * Returns 1 if the directory entry should be included in the
218 * diff, else 0. Checks the excludes list.
221 selectfile(const struct dirent *dp)
223 struct excludes *excl;
225 if (dp->d_fileno == 0)
228 /* always skip "." and ".." */
229 if (dp->d_name[0] == '.' && (dp->d_name[1] == '\0' ||
230 (dp->d_name[1] == '.' && dp->d_name[2] == '\0')))
233 /* check excludes list */
234 for (excl = excludes_list; excl != NULL; excl = excl->next)
235 if (fnmatch(excl->pattern, dp->d_name, FNM_PATHNAME) == 0)