Head

GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	usr.bin/diff/diff.c	Lines:	63	173	36.4 %
Date:	2017-11-07	Branches:	45	126	35.7 %


/*	$OpenBSD: diff.c,v 1.65 2015/12/29 19:04:46 gsoares Exp $	*/

/*
 * Copyright (c) 2003 Todd C. Miller <Todd.Miller@courtesan.com>
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 *
 * Sponsored in part by the Defense Advanced Research Projects
 * Agency (DARPA) and Air Force Research Laboratory, Air Force
 * Materiel Command, USAF, under agreement number F39502-99-1-0512.
 */

#include <sys/stat.h>

#include <ctype.h>
#include <err.h>
#include <errno.h>
#include <getopt.h>
#include <stdlib.h>
#include <stdio.h>
#include <stdarg.h>
#include <string.h>
#include <unistd.h>
#include <limits.h>

#include "diff.h"
#include "xmalloc.h"

int	 Nflag, Pflag, rflag, sflag, Tflag;
int	 diff_format, diff_context, status;
char	*start, *ifdefname, *diffargs, *label[2], *ignore_pats;
struct stat stb1, stb2;
struct excludes *excludes_list;
regex_t	 ignore_re;

#define	OPTIONS	"0123456789abC:cdD:efhI:iL:lnNPpqrS:sTtU:uwX:x:"
static struct option longopts[] = {
	{ "text",			no_argument,		0,	'a' },
	{ "ignore-space-change",	no_argument,		0,	'b' },
	{ "context",			optional_argument,	0,	'C' },
	{ "ifdef",			required_argument,	0,	'D' },
	{ "minimal",			no_argument,		0,	'd' },
	{ "ed",				no_argument,		0,	'e' },
	{ "forward-ed",			no_argument,		0,	'f' },
	{ "ignore-matching-lines",	required_argument,	0,	'I' },
	{ "ignore-case",		no_argument,		0,	'i' },
	{ "label",			required_argument,	0,	'L' },
	{ "new-file",			no_argument,		0,	'N' },
	{ "rcs",			no_argument,		0,	'n' },
	{ "unidirectional-new-file",	no_argument,		0,	'P' },
	{ "show-c-function",		no_argument,		0,	'p' },
	{ "brief",			no_argument,		0,	'q' },
	{ "recursive",			no_argument,		0,	'r' },
	{ "report-identical-files",	no_argument,		0,	's' },
	{ "starting-file",		required_argument,	0,	'S' },
	{ "expand-tabs",		no_argument,		0,	't' },
	{ "initial-tab",		no_argument,		0,	'T' },
	{ "unified",			optional_argument,	0,	'U' },
	{ "ignore-all-space",		no_argument,		0,	'w' },
	{ "exclude",			required_argument,	0,	'x' },
	{ "exclude-from",		required_argument,	0,	'X' },
	{ NULL,				0,			0,	'\0'}
};

__dead void usage(void);
void push_excludes(char *);
void push_ignore_pats(char *);
void read_excludes_file(char *file);
void set_argstr(char **, char **);

int
main(int argc, char **argv)
{
	char *ep, **oargv;
	long  l;
	int   ch, dflags, lastch, gotstdin, prevoptind, newarg;

	oargv = argv;
	gotstdin = 0;
	dflags = 0;
	lastch = '\0';
	prevoptind = 1;
	newarg = 1;
	while ((ch = getopt_long(argc, argv, OPTIONS, longopts, NULL)) != -1) {
		switch (ch) {
		case '0': case '1': case '2': case '3': case '4':
		case '5': case '6': case '7': case '8': case '9':
			if (newarg)
				usage();	/* disallow -[0-9]+ */
			else if (lastch == 'c' || lastch == 'u')
				diff_context = 0;
			else if (!isdigit(lastch) || diff_context > INT_MAX / 10)
				usage();
			diff_context = (diff_context * 10) + (ch - '0');
			break;
		case 'a':
			dflags |= D_FORCEASCII;
			break;
		case 'b':
			dflags |= D_FOLDBLANKS;
			break;
		case 'C':
		case 'c':
			diff_format = D_CONTEXT;
			if (optarg != NULL) {
				l = strtol(optarg, &ep, 10);
				if (*ep != '\0' || l < 0 || l >= INT_MAX)
					usage();
				diff_context = (int)l;
			} else
				diff_context = 3;
			break;
		case 'd':
			dflags |= D_MINIMAL;
			break;
		case 'D':
			diff_format = D_IFDEF;
			ifdefname = optarg;
			break;
		case 'e':
			diff_format = D_EDIT;
			break;
		case 'f':
			diff_format = D_REVERSE;
			break;
		case 'h':
			/* silently ignore for backwards compatibility */
			break;
		case 'I':
			push_ignore_pats(optarg);
			break;
		case 'i':
			dflags |= D_IGNORECASE;
			break;
		case 'L':
			if (label[0] == NULL)
				label[0] = optarg;
			else if (label[1] == NULL)
				label[1] = optarg;
			else
				usage();
			break;
		case 'N':
			Nflag = 1;
			break;
		case 'n':
			diff_format = D_NREVERSE;
			break;
		case 'p':
			dflags |= D_PROTOTYPE;
			break;
		case 'P':
			Pflag = 1;
			break;
		case 'r':
			rflag = 1;
			break;
		case 'q':
			diff_format = D_BRIEF;
			break;
		case 'S':
			start = optarg;
			break;
		case 's':
			sflag = 1;
			break;
		case 'T':
			Tflag = 1;
			break;
		case 't':
			dflags |= D_EXPANDTABS;
			break;
		case 'U':
		case 'u':
			diff_format = D_UNIFIED;
			if (optarg != NULL) {
				l = strtol(optarg, &ep, 10);
				if (*ep != '\0' || l < 0 || l >= INT_MAX)
					usage();
				diff_context = (int)l;
			} else
				diff_context = 3;
			break;
		case 'w':
			dflags |= D_IGNOREBLANKS;
			break;
		case 'X':
			read_excludes_file(optarg);
			break;
		case 'x':
			push_excludes(optarg);
			break;
		default:
			usage();
			break;
		}
		lastch = ch;
		newarg = optind != prevoptind;
		prevoptind = optind;
	}
	argc -= optind;
	argv += optind;

	if (pledge("stdio rpath tmppath flock cpath wpath", NULL) == -1)
		err(2, "pledge");

	/*
	 * Do sanity checks, fill in stb1 and stb2 and call the appropriate
	 * driver routine.  Both drivers use the contents of stb1 and stb2.
	 */
	if (argc != 2)
		usage();
	if (ignore_pats != NULL) {
		char buf[BUFSIZ];
		int error;

		if ((error = regcomp(&ignore_re, ignore_pats,
				     REG_NEWLINE | REG_EXTENDED)) != 0) {
			regerror(error, &ignore_re, buf, sizeof(buf));
			if (*ignore_pats != '\0')
				errx(2, "%s: %s", ignore_pats, buf);
			else
				errx(2, "%s", buf);
		}
	}
	if (strcmp(argv[0], "-") == 0) {
		fstat(STDIN_FILENO, &stb1);
		gotstdin = 1;
	} else if (stat(argv[0], &stb1) != 0)
		err(2, "%s", argv[0]);
	if (strcmp(argv[1], "-") == 0) {
		fstat(STDIN_FILENO, &stb2);
		gotstdin = 1;
	} else if (stat(argv[1], &stb2) != 0)
		err(2, "%s", argv[1]);
	if (gotstdin && (S_ISDIR(stb1.st_mode) || S_ISDIR(stb2.st_mode)))
		errx(2, "can't compare - to a directory");
	set_argstr(oargv, argv);
	if (S_ISDIR(stb1.st_mode) && S_ISDIR(stb2.st_mode)) {
		if (diff_format == D_IFDEF)
			errx(2, "-D option not supported with directories");
		diffdir(argv[0], argv[1], dflags);
	} else {
		if (S_ISDIR(stb1.st_mode)) {
			argv[0] = splice(argv[0], argv[1]);
			if (stat(argv[0], &stb1) < 0)
				err(2, "%s", argv[0]);
		}
		if (S_ISDIR(stb2.st_mode)) {
			argv[1] = splice(argv[1], argv[0]);
			if (stat(argv[1], &stb2) < 0)
				err(2, "%s", argv[1]);
		}
		print_status(diffreg(argv[0], argv[1], dflags), argv[0], argv[1],
		    "");
	}
	exit(status);
}

void
set_argstr(char **av, char **ave)
{
	size_t argsize;
	char **ap;

	argsize = 4 + *ave - *av + 1;
	diffargs = xmalloc(argsize);
	strlcpy(diffargs, "diff", argsize);
	for (ap = av + 1; ap < ave; ap++) {
		if (strcmp(*ap, "--") != 0) {
			strlcat(diffargs, " ", argsize);
			strlcat(diffargs, *ap, argsize);
		}
	}
}

/*
 * Read in an excludes file and push each line.
 */
void
read_excludes_file(char *file)
{
	FILE *fp;
	char *buf, *pattern;
	size_t len;

	if (strcmp(file, "-") == 0)
		fp = stdin;
	else if ((fp = fopen(file, "r")) == NULL)
		err(2, "%s", file);
	while ((buf = fgetln(fp, &len)) != NULL) {
		if (buf[len - 1] == '\n')
			len--;
		pattern = xmalloc(len + 1);
		memcpy(pattern, buf, len);
		pattern[len] = '\0';
		push_excludes(pattern);
	}
	if (strcmp(file, "-") != 0)
		fclose(fp);
}

/*
 * Push a pattern onto the excludes list.
 */
void
push_excludes(char *pattern)
{
	struct excludes *entry;

	entry = xmalloc(sizeof(*entry));
	entry->pattern = pattern;
	entry->next = excludes_list;
	excludes_list = entry;
}

void
push_ignore_pats(char *pattern)
{
	size_t len;

	if (ignore_pats == NULL)
		ignore_pats = xstrdup(pattern);
	else {
		/* old + "|" + new + NUL */
		len = strlen(ignore_pats) + strlen(pattern) + 2;
		ignore_pats = xreallocarray(ignore_pats, 1, len);
		strlcat(ignore_pats, "|", len);
		strlcat(ignore_pats, pattern, len);
	}
}

void
print_only(const char *path, size_t dirlen, const char *entry)
{
	if (dirlen > 1)
		dirlen--;
	printf("Only in %.*s: %s\n", (int)dirlen, path, entry);
}

void
print_status(int val, char *path1, char *path2, char *entry)
{
	switch (val) {
	case D_BINARY:
		printf("Binary files %s%s and %s%s differ\n",
		    path1, entry, path2, entry);
		break;
	case D_DIFFER:
		if (diff_format == D_BRIEF)
			printf("Files %s%s and %s%s differ\n",
			    path1, entry, path2, entry);
		break;
	case D_SAME:
		if (sflag)
			printf("Files %s%s and %s%s are identical\n",
			    path1, entry, path2, entry);
		break;
	case D_MISMATCH1:
		printf("File %s%s is a directory while file %s%s is a regular file\n",
		    path1, entry, path2, entry);
		break;
	case D_MISMATCH2:
		printf("File %s%s is a regular file while file %s%s is a directory\n",
		    path1, entry, path2, entry);
		break;
	case D_SKIPPED1:
		printf("File %s%s is not a regular file or directory and was skipped\n",
		    path1, entry);
		break;
	case D_SKIPPED2:
		printf("File %s%s is not a regular file or directory and was skipped\n",
		    path2, entry);
		break;
	}
}

__dead void
usage(void)
{
	(void)fprintf(stderr,
	    "usage: diff [-abdipTtw] [-c | -e | -f | -n | -q | -u] [-I pattern] [-L label]\n"
	    "            file1 file2\n"
	    "       diff [-abdipTtw] [-I pattern] [-L label] -C number file1 file2\n"
	    "       diff [-abditw] [-I pattern] -D string file1 file2\n"
	    "       diff [-abdipTtw] [-I pattern] [-L label] -U number file1 file2\n"
	    "       diff [-abdiNPprsTtw] [-c | -e | -f | -n | -q | -u] [-I pattern]\n"
	    "            [-L label] [-S name] [-X file] [-x pattern] dir1 dir2\n");

	exit(2);
}


Generated by: GCOVR (Version 3.3)

Line	Branch	Exec	Source
1			/* $OpenBSD: diff.c,v 1.65 2015/12/29 19:04:46 gsoares Exp $ */
2
3			/*
4			* Copyright (c) 2003 Todd C. Miller <Todd.Miller@courtesan.com>
5			*
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.
9			*
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.
17			*
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.
21			*/
22
23			#include <sys/stat.h>
24
25			#include <ctype.h>
26			#include <err.h>
27			#include <errno.h>
28			#include <getopt.h>
29			#include <stdlib.h>
30			#include <stdio.h>
31			#include <stdarg.h>
32			#include <string.h>
33			#include <unistd.h>
34			#include <limits.h>
35
36			#include "diff.h"
37			#include "xmalloc.h"
38
39			int Nflag, Pflag, rflag, sflag, Tflag;
40			int diff_format, diff_context, status;
41			char start, ifdefname, diffargs, label[2], *ignore_pats;
42			struct stat stb1, stb2;
43			struct excludes *excludes_list;
44			regex_t ignore_re;
45
46			#define OPTIONS "0123456789abC:cdD:efhI:iL:lnNPpqrS:sTtU:uwX:x:"
47			static struct option longopts[] = {
48			{ "text", no_argument, 0, 'a' },
49			{ "ignore-space-change", no_argument, 0, 'b' },
50			{ "context", optional_argument, 0, 'C' },
51			{ "ifdef", required_argument, 0, 'D' },
52			{ "minimal", no_argument, 0, 'd' },
53			{ "ed", no_argument, 0, 'e' },
54			{ "forward-ed", no_argument, 0, 'f' },
55			{ "ignore-matching-lines", required_argument, 0, 'I' },
56			{ "ignore-case", no_argument, 0, 'i' },
57			{ "label", required_argument, 0, 'L' },
58			{ "new-file", no_argument, 0, 'N' },
59			{ "rcs", no_argument, 0, 'n' },
60			{ "unidirectional-new-file", no_argument, 0, 'P' },
61			{ "show-c-function", no_argument, 0, 'p' },
62			{ "brief", no_argument, 0, 'q' },
63			{ "recursive", no_argument, 0, 'r' },
64			{ "report-identical-files", no_argument, 0, 's' },
65			{ "starting-file", required_argument, 0, 'S' },
66			{ "expand-tabs", no_argument, 0, 't' },
67			{ "initial-tab", no_argument, 0, 'T' },
68			{ "unified", optional_argument, 0, 'U' },
69			{ "ignore-all-space", no_argument, 0, 'w' },
70			{ "exclude", required_argument, 0, 'x' },
71			{ "exclude-from", required_argument, 0, 'X' },
72			{ NULL, 0, 0, '\0'}
73			};
74
75			__dead void usage(void);
76			void push_excludes(char *);
77			void push_ignore_pats(char *);
78			void read_excludes_file(char *file);
79			void set_argstr(char , char );
80
81			int
82			main(int argc, char **argv)
83			{
84		44520	char ep, *oargv;
85			long l;
86			int ch, dflags, lastch, gotstdin, prevoptind, newarg;
87
88			oargv = argv;
89			gotstdin = 0;
90			dflags = 0;
91			lastch = '\0';
92			prevoptind = 1;
93			newarg = 1;
94	✓✓	107754	while ((ch = getopt_long(argc, argv, OPTIONS, longopts, NULL)) != -1) {
95	✗✗✗✗ ✗✗✗✗ ✗✓✓✗ ✗✓✗✗ ✓✗✓✗ ✗✗✗✓ ✗✗✓✗ ✗✗✗✗ ✓✗✗✗ ✗✓	63234	switch (ch) {
96			case '0': case '1': case '2': case '3': case '4':
97			case '5': case '6': case '7': case '8': case '9':
98	✗✓	18	if (newarg)
99			usage(); /* disallow -[0-9]+ */
100	✓✓	18	else if (lastch == 'c' \|\| lastch == 'u')
101		9	diff_context = 0;
102	✗✓	9	else if (!isdigit(lastch) \|\| diff_context > INT_MAX / 10)
103			usage();
104		18	diff_context = (diff_context * 10) + (ch - '0');
105		18	break;
106			case 'a':
107		10860	dflags \|= D_FORCEASCII;
108		10860	break;
109			case 'b':
110			dflags \|= D_FOLDBLANKS;
111			break;
112			case 'C':
113			case 'c':
114		135	diff_format = D_CONTEXT;
115	✗✓	135	if (optarg != NULL) {
116			l = strtol(optarg, &ep, 10);
117			if (*ep != '\0' \|\| l < 0 \|\| l >= INT_MAX)
118			usage();
119			diff_context = (int)l;
120			} else
121			diff_context = 3;
122		135	break;
123			case 'd':
124			dflags \|= D_MINIMAL;
125			break;
126			case 'D':
127			diff_format = D_IFDEF;
128			ifdefname = optarg;
129			break;
130			case 'e':
131		135	diff_format = D_EDIT;
132		135	break;
133			case 'f':
134			diff_format = D_REVERSE;
135			break;
136			case 'h':
137			/* silently ignore for backwards compatibility */
138			break;
139			case 'I':
140		64	push_ignore_pats(optarg);
141		64	break;
142			case 'i':
143			dflags \|= D_IGNORECASE;
144			break;
145			case 'L':
146			if (label[0] == NULL)
147			label[0] = optarg;
148			else if (label[1] == NULL)
149			label[1] = optarg;
150			else
151			usage();
152			break;
153			case 'N':
154			Nflag = 1;
155			break;
156			case 'n':
157			diff_format = D_NREVERSE;
158			break;
159			case 'p':
160		22	dflags \|= D_PROTOTYPE;
161		22	break;
162			case 'P':
163			Pflag = 1;
164			break;
165			case 'r':
166			rflag = 1;
167			break;
168			case 'q':
169		873	diff_format = D_BRIEF;
170		873	break;
171			case 'S':
172			start = optarg;
173			break;
174			case 's':
175			sflag = 1;
176			break;
177			case 'T':
178			Tflag = 1;
179			break;
180			case 't':
181			dflags \|= D_EXPANDTABS;
182			break;
183			case 'U':
184			case 'u':
185		19510	diff_format = D_UNIFIED;
186	✗✓	19510	if (optarg != NULL) {
187			l = strtol(optarg, &ep, 10);
188			if (*ep != '\0' \|\| l < 0 \|\| l >= INT_MAX)
189			usage();
190			diff_context = (int)l;
191			} else
192			diff_context = 3;
193		19510	break;
194			case 'w':
195			dflags \|= D_IGNOREBLANKS;
196			break;
197			case 'X':
198			read_excludes_file(optarg);
199			break;
200			case 'x':
201			push_excludes(optarg);
202			break;
203			default:
204			usage();
205			break;
206			}
207			lastch = ch;
208		31617	newarg = optind != prevoptind;
209			prevoptind = optind;
210			}
211		22260	argc -= optind;
212		22260	argv += optind;
213
214	✗✓	22260	if (pledge("stdio rpath tmppath flock cpath wpath", NULL) == -1)
215			err(2, "pledge");
216
217			/*
218			* Do sanity checks, fill in stb1 and stb2 and call the appropriate
219			* driver routine. Both drivers use the contents of stb1 and stb2.
220			*/
221	✗✓	22260	if (argc != 2)
222			usage();
223	✓✓	22260	if (ignore_pats != NULL) {
224		64	char buf[BUFSIZ];
225			int error;
226
227	✗✓	128	if ((error = regcomp(&ignore_re, ignore_pats,
228		64	REG_NEWLINE \| REG_EXTENDED)) != 0) {
229			regerror(error, &ignore_re, buf, sizeof(buf));
230			if (*ignore_pats != '\0')
231			errx(2, "%s: %s", ignore_pats, buf);
232			else
233			errx(2, "%s", buf);
234			}
235		64	}
236	✓✓	22260	if (strcmp(argv[0], "-") == 0) {
237		1253	fstat(STDIN_FILENO, &stb1);
238			gotstdin = 1;
239	✓✓	22260	} else if (stat(argv[0], &stb1) != 0)
240			err(2, "%s", argv[0]);
241	✓✓	22258	if (strcmp(argv[1], "-") == 0) {
242		6658	fstat(STDIN_FILENO, &stb2);
243			gotstdin = 1;
244	✗✓	22258	} else if (stat(argv[1], &stb2) != 0)
245			err(2, "%s", argv[1]);
246	✓✓✓✗ ✗✓	38080	if (gotstdin && (S_ISDIR(stb1.st_mode) \|\| S_ISDIR(stb2.st_mode)))
247			errx(2, "can't compare - to a directory");
248		22258	set_argstr(oargv, argv);
249	✗✓✗✗	22258	if (S_ISDIR(stb1.st_mode) && S_ISDIR(stb2.st_mode)) {
250			if (diff_format == D_IFDEF)
251			errx(2, "-D option not supported with directories");
252			diffdir(argv[0], argv[1], dflags);
253			} else {
254	✗✓	22258	if (S_ISDIR(stb1.st_mode)) {
255			argv[0] = splice(argv[0], argv[1]);
256			if (stat(argv[0], &stb1) < 0)
257			err(2, "%s", argv[0]);
258			}
259	✗✓	22258	if (S_ISDIR(stb2.st_mode)) {
260			argv[1] = splice(argv[1], argv[0]);
261			if (stat(argv[1], &stb2) < 0)
262			err(2, "%s", argv[1]);
263			}
264		22258	print_status(diffreg(argv[0], argv[1], dflags), argv[0], argv[1],
265			"");
266			}
267			exit(status);
268			}
269
270			void
271			set_argstr(char av, char ave)
272			{
273			size_t argsize;
274			char **ap;
275
276		44516	argsize = 4 + ave - av + 1;
277		22258	diffargs = xmalloc(argsize);
278		22258	strlcpy(diffargs, "diff", argsize);
279	✓✓	86078	for (ap = av + 1; ap < ave; ap++) {
280	✓✗	20781	if (strcmp(*ap, "--") != 0) {
281		20781	strlcat(diffargs, " ", argsize);
282		20781	strlcat(diffargs, *ap, argsize);
283		20781	}
284			}
285		22258	}
286
287			/*
288			* Read in an excludes file and push each line.
289			*/
290			void
291			read_excludes_file(char *file)
292			{
293			FILE *fp;
294			char buf, pattern;
295			size_t len;
296
297			if (strcmp(file, "-") == 0)
298			fp = stdin;
299			else if ((fp = fopen(file, "r")) == NULL)
300			err(2, "%s", file);
301			while ((buf = fgetln(fp, &len)) != NULL) {
302			if (buf[len - 1] == '\n')
303			len--;
304			pattern = xmalloc(len + 1);
305			memcpy(pattern, buf, len);
306			pattern[len] = '\0';
307			push_excludes(pattern);
308			}
309			if (strcmp(file, "-") != 0)
310			fclose(fp);
311			}
312
313			/*
314			* Push a pattern onto the excludes list.
315			*/
316			void
317			push_excludes(char *pattern)
318			{
319			struct excludes *entry;
320
321			entry = xmalloc(sizeof(*entry));
322			entry->pattern = pattern;
323			entry->next = excludes_list;
324			excludes_list = entry;
325			}
326
327			void
328			push_ignore_pats(char *pattern)
329			{
330			size_t len;
331
332	✓✗	128	if (ignore_pats == NULL)
333		64	ignore_pats = xstrdup(pattern);
334			else {
335			/* old + "\|" + new + NUL */
336			len = strlen(ignore_pats) + strlen(pattern) + 2;
337			ignore_pats = xreallocarray(ignore_pats, 1, len);
338			strlcat(ignore_pats, "\|", len);
339			strlcat(ignore_pats, pattern, len);
340			}
341		64	}
342
343			void
344			print_only(const char path, size_t dirlen, const char entry)
345			{
346			if (dirlen > 1)
347			dirlen--;
348			printf("Only in %.*s: %s\n", (int)dirlen, path, entry);
349			}
350
351			void
352			print_status(int val, char path1, char path2, char *entry)
353			{
354	✗✓✓✗ ✗✗✗✓	66774	switch (val) {
355			case D_BINARY:
356			printf("Binary files %s%s and %s%s differ\n",
357			path1, entry, path2, entry);
358			break;
359			case D_DIFFER:
360	✗✓	779	if (diff_format == D_BRIEF)
361			printf("Files %s%s and %s%s differ\n",
362			path1, entry, path2, entry);
363			break;
364			case D_SAME:
365	✗✓	21479	if (sflag)
366			printf("Files %s%s and %s%s are identical\n",
367			path1, entry, path2, entry);
368			break;
369			case D_MISMATCH1:
370			printf("File %s%s is a directory while file %s%s is a regular file\n",
371			path1, entry, path2, entry);
372			break;
373			case D_MISMATCH2:
374			printf("File %s%s is a regular file while file %s%s is a directory\n",
375			path1, entry, path2, entry);
376			break;
377			case D_SKIPPED1:
378			printf("File %s%s is not a regular file or directory and was skipped\n",
379			path1, entry);
380			break;
381			case D_SKIPPED2:
382			printf("File %s%s is not a regular file or directory and was skipped\n",
383			path2, entry);
384			break;
385			}
386		22258	}
387
388			__dead void
389			usage(void)
390			{
391			(void)fprintf(stderr,
392			"usage: diff [-abdipTtw] [-c \| -e \| -f \| -n \| -q \| -u] [-I pattern] [-L label]\n"
393			" file1 file2\n"
394			" diff [-abdipTtw] [-I pattern] [-L label] -C number file1 file2\n"
395			" diff [-abditw] [-I pattern] -D string file1 file2\n"
396			" diff [-abdipTtw] [-I pattern] [-L label] -U number file1 file2\n"
397			" diff [-abdiNPprsTtw] [-c \| -e \| -f \| -n \| -q \| -u] [-I pattern]\n"
398			" [-L label] [-S name] [-X file] [-x pattern] dir1 dir2\n");
399
400			exit(2);
401			}