3931c072c6
With --ignore-file-name-case we need to compare files regardless of case. We need to propigate both names down to diffit so we can look up the correct file when the names differ based on case, otherwise we try to look up the file using the case from the a tree which might not be discoverable if its case is different in the b tree. Reviewed by: bapt Sponsored by: Klara Inc. Differential Revision: https://reviews.freebsd.org/D34201
318 lines
7.9 KiB
C
318 lines
7.9 KiB
C
/* $OpenBSD: diffdir.c,v 1.45 2015/10/05 20:15:00 millert Exp $ */
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/*
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* Copyright (c) 2003, 2010 Todd C. Miller <Todd.Miller@courtesan.com>
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*
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* Sponsored in part by the Defense Advanced Research Projects
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* Agency (DARPA) and Air Force Research Laboratory, Air Force
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* Materiel Command, USAF, under agreement number F39502-99-1-0512.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/stat.h>
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#include <dirent.h>
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#include <err.h>
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#include <errno.h>
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#include <fnmatch.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <limits.h>
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#include <unistd.h>
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#include "diff.h"
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static int selectfile(const struct dirent *);
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static void diffit(struct dirent *, char *, size_t, struct dirent *,
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char *, size_t, int);
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static void print_only(const char *, size_t, const char *);
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#define d_status d_type /* we need to store status for -l */
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/*
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* Diff directory traversal. Will be called recursively if -r was specified.
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*/
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void
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diffdir(char *p1, char *p2, int flags)
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{
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struct dirent *dent1, **dp1, **edp1, **dirp1 = NULL;
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struct dirent *dent2, **dp2, **edp2, **dirp2 = NULL;
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size_t dirlen1, dirlen2;
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char path1[PATH_MAX], path2[PATH_MAX];
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int pos;
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edp1 = edp2 = NULL;
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dirlen1 = strlcpy(path1, *p1 ? p1 : ".", sizeof(path1));
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if (dirlen1 >= sizeof(path1) - 1) {
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warnc(ENAMETOOLONG, "%s", p1);
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status |= 2;
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return;
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}
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if (path1[dirlen1 - 1] != '/') {
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path1[dirlen1++] = '/';
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path1[dirlen1] = '\0';
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}
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dirlen2 = strlcpy(path2, *p2 ? p2 : ".", sizeof(path2));
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if (dirlen2 >= sizeof(path2) - 1) {
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warnc(ENAMETOOLONG, "%s", p2);
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status |= 2;
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return;
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}
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if (path2[dirlen2 - 1] != '/') {
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path2[dirlen2++] = '/';
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path2[dirlen2] = '\0';
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}
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/*
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* Get a list of entries in each directory, skipping "excluded" files
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* and sorting alphabetically.
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*/
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pos = scandir(path1, &dirp1, selectfile, alphasort);
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if (pos == -1) {
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if (errno == ENOENT && (Nflag || Pflag)) {
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pos = 0;
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} else {
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warn("%s", path1);
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goto closem;
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}
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}
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dp1 = dirp1;
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edp1 = dirp1 + pos;
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pos = scandir(path2, &dirp2, selectfile, alphasort);
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if (pos == -1) {
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if (errno == ENOENT && Nflag) {
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pos = 0;
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} else {
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warn("%s", path2);
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goto closem;
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}
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}
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dp2 = dirp2;
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edp2 = dirp2 + pos;
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/*
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* If we were given a starting point, find it.
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*/
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if (start != NULL) {
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while (dp1 != edp1 && strcmp((*dp1)->d_name, start) < 0)
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dp1++;
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while (dp2 != edp2 && strcmp((*dp2)->d_name, start) < 0)
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dp2++;
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}
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/*
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* Iterate through the two directory lists, diffing as we go.
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*/
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while (dp1 != edp1 || dp2 != edp2) {
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dent1 = dp1 != edp1 ? *dp1 : NULL;
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dent2 = dp2 != edp2 ? *dp2 : NULL;
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pos = dent1 == NULL ? 1 : dent2 == NULL ? -1 :
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ignore_file_case ? strcasecmp(dent1->d_name, dent2->d_name) :
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strcmp(dent1->d_name, dent2->d_name) ;
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if (pos == 0) {
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/* file exists in both dirs, diff it */
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diffit(dent1, path1, dirlen1, dent2, path2, dirlen2, flags);
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dp1++;
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dp2++;
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} else if (pos < 0) {
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/* file only in first dir, only diff if -N */
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if (Nflag) {
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diffit(dent1, path1, dirlen1, dent2, path2,
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dirlen2, flags);
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} else {
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print_only(path1, dirlen1, dent1->d_name);
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status |= 1;
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}
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dp1++;
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} else {
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/* file only in second dir, only diff if -N or -P */
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if (Nflag || Pflag)
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diffit(dent2, path1, dirlen1, dent1, path2,
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dirlen2, flags);
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else {
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print_only(path2, dirlen2, dent2->d_name);
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status |= 1;
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}
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dp2++;
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}
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}
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closem:
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if (dirp1 != NULL) {
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for (dp1 = dirp1; dp1 < edp1; dp1++)
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free(*dp1);
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free(dirp1);
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}
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if (dirp2 != NULL) {
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for (dp2 = dirp2; dp2 < edp2; dp2++)
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free(*dp2);
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free(dirp2);
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}
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}
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/*
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* Do the actual diff by calling either diffreg() or diffdir().
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*/
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static void
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diffit(struct dirent *dp, char *path1, size_t plen1, struct dirent *dp2,
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char *path2, size_t plen2, int flags)
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{
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flags |= D_HEADER;
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strlcpy(path1 + plen1, dp->d_name, PATH_MAX - plen1);
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/*
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* If we are ignoring file case, use dent2s name here if both names are
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* the same apart from case.
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*/
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if (ignore_file_case && strcasecmp(dp2->d_name, dp2->d_name) == 0)
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strlcpy(path2 + plen2, dp2->d_name, PATH_MAX - plen2);
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else
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strlcpy(path2 + plen2, dp->d_name, PATH_MAX - plen2);
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if (noderef) {
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if (lstat(path1, &stb1) != 0) {
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if (!(Nflag || Pflag) || errno != ENOENT) {
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warn("%s", path1);
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return;
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}
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flags |= D_EMPTY1;
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memset(&stb1, 0, sizeof(stb1));
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}
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if (lstat(path2, &stb2) != 0) {
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if (!Nflag || errno != ENOENT) {
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warn("%s", path2);
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return;
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}
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flags |= D_EMPTY2;
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memset(&stb2, 0, sizeof(stb2));
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stb2.st_mode = stb1.st_mode;
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}
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if (stb1.st_mode == 0)
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stb1.st_mode = stb2.st_mode;
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if (S_ISLNK(stb1.st_mode) || S_ISLNK(stb2.st_mode)) {
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if (S_ISLNK(stb1.st_mode) && S_ISLNK(stb2.st_mode)) {
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char buf1[PATH_MAX];
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char buf2[PATH_MAX];
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ssize_t len1 = 0;
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ssize_t len2 = 0;
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len1 = readlink(path1, buf1, sizeof(buf1));
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len2 = readlink(path2, buf2, sizeof(buf2));
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if (len1 < 0 || len2 < 0) {
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perror("reading links");
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return;
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}
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buf1[len1] = '\0';
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buf2[len2] = '\0';
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if (len1 != len2 || strncmp(buf1, buf2, len1) != 0) {
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printf("Symbolic links %s and %s differ\n",
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path1, path2);
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status |= 1;
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}
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return;
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}
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printf("File %s is a %s while file %s is a %s\n",
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path1, S_ISLNK(stb1.st_mode) ? "symbolic link" :
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(S_ISDIR(stb1.st_mode) ? "directory" :
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(S_ISREG(stb1.st_mode) ? "file" : "error")),
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path2, S_ISLNK(stb2.st_mode) ? "symbolic link" :
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(S_ISDIR(stb2.st_mode) ? "directory" :
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(S_ISREG(stb2.st_mode) ? "file" : "error")));
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status |= 1;
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return;
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}
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} else {
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if (stat(path1, &stb1) != 0) {
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if (!(Nflag || Pflag) || errno != ENOENT) {
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warn("%s", path1);
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return;
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}
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flags |= D_EMPTY1;
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memset(&stb1, 0, sizeof(stb1));
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}
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if (stat(path2, &stb2) != 0) {
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if (!Nflag || errno != ENOENT) {
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warn("%s", path2);
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return;
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}
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flags |= D_EMPTY2;
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memset(&stb2, 0, sizeof(stb2));
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stb2.st_mode = stb1.st_mode;
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}
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if (stb1.st_mode == 0)
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stb1.st_mode = stb2.st_mode;
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}
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if (S_ISDIR(stb1.st_mode) && S_ISDIR(stb2.st_mode)) {
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if (rflag)
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diffdir(path1, path2, flags);
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else
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printf("Common subdirectories: %s and %s\n",
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path1, path2);
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return;
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}
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if (!S_ISREG(stb1.st_mode) && !S_ISDIR(stb1.st_mode))
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dp->d_status = D_SKIPPED1;
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else if (!S_ISREG(stb2.st_mode) && !S_ISDIR(stb2.st_mode))
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dp->d_status = D_SKIPPED2;
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else
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dp->d_status = diffreg(path1, path2, flags, 0);
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print_status(dp->d_status, path1, path2, "");
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}
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/*
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* Returns 1 if the directory entry should be included in the
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* diff, else 0. Checks the excludes list.
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*/
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static int
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selectfile(const struct dirent *dp)
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{
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struct excludes *excl;
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if (dp->d_fileno == 0)
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return (0);
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/* always skip "." and ".." */
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if (dp->d_name[0] == '.' && (dp->d_name[1] == '\0' ||
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(dp->d_name[1] == '.' && dp->d_name[2] == '\0')))
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return (0);
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/* check excludes list */
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for (excl = excludes_list; excl != NULL; excl = excl->next)
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if (fnmatch(excl->pattern, dp->d_name, FNM_PATHNAME) == 0)
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return (0);
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return (1);
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}
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void
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print_only(const char *path, size_t dirlen, const char *entry)
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{
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if (dirlen > 1)
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dirlen--;
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printf("Only in %.*s: %s\n", (int)dirlen, path, entry);
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}
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