Head

GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	usr.bin/uudecode/uudecode.c	Lines:	100	216	46.3 %
Date:	2016-12-06	Branches:	71	183	38.8 %


/*	$OpenBSD: uudecode.c,v 1.23 2016/01/03 14:43:20 tb Exp $	*/
/*	$FreeBSD: uudecode.c,v 1.49 2003/05/03 19:44:46 obrien Exp $	*/

/*-
 * Copyright (c) 1983, 1993
 *	The Regents of the University of California.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

/*
 * Create the specified file, decoding as you go.
 * Used with uuencode.
 */

#include <sys/socket.h>
#include <sys/stat.h>

#include <netinet/in.h>

#include <err.h>
#include <errno.h>
#include <fcntl.h>
#include <locale.h>
#include <pwd.h>
#include <resolv.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <limits.h>

static const char *infile, *outfile;
static FILE *infp, *outfp;
static int base64, cflag, iflag, oflag, pflag, rflag, sflag;

static void	usage(void);
static int	decode(void);
static int	decode2(void);
static int	uu_decode(void);
static int	base64_decode(void);

enum program_mode {
	MODE_DECODE,
	MODE_B64DECODE
} pmode;

int
main(int argc, char *argv[])
{
	int rval, ch;
	extern char *__progname;
	static const char *optstr[2] = {
		"cimo:prs",
		"cio:prs"
	};

	pmode = MODE_DECODE;
	if (strcmp(__progname, "b64decode") == 0) {
		base64 = 1;
		pmode = MODE_B64DECODE;
	}

	setlocale(LC_ALL, "");
	while ((ch = getopt(argc, argv, optstr[pmode])) != -1) {
		switch(ch) {
		case 'c':
			if (oflag || rflag)
				usage();
			cflag = 1; /* multiple uudecode'd files */
			break;
		case 'i':
			iflag = 1; /* ask before override files */
			break;
		case 'm':
			base64 = 1;
			break;
		case 'o':
			if (cflag || pflag || rflag || sflag)
				usage();
			oflag = 1; /* output to the specified file */
			sflag = 1; /* do not strip pathnames for output */
			outfile = optarg; /* set the output filename */
			break;
		case 'p':
			if (oflag)
				usage();
			pflag = 1; /* print output to stdout */
			break;
		case 'r':
			if (cflag || oflag)
				usage();
			rflag = 1; /* decode raw data */
			break;
		case 's':
			if (oflag)
				usage();
			sflag = 1; /* do not strip pathnames for output */
			break;
		default:
			usage();
		}
	}
	argc -= optind;
	argv += optind;

	if (sflag) {
		if (pledge("stdio rpath wpath cpath getpw", NULL) == -1)
			err(1, "pledge");
	} else if (pflag == 0) {
		if (pledge("stdio rpath wpath cpath", NULL) == -1)
			err(1, "pledge");
	} else {
		if (pledge("stdio rpath wpath cpath", NULL) == -1)
			err(1, "pledge");
	}

	if (*argv) {
		rval = 0;
		do {
			infp = fopen(infile = *argv, "r");
			if (infp == NULL) {
				warn("%s", *argv);
				rval = 1;
				continue;
			}
			rval |= decode();
			fclose(infp);
		} while (*++argv);
	} else {
		infile = "stdin";
		infp = stdin;
		rval = decode();
	}
	exit(rval);
}

static int
decode(void)
{
	int r, v;

	if (rflag) {
		/* relaxed alternative to decode2() */
		outfile = "/dev/stdout";
		outfp = stdout;
		if (base64)
			return (base64_decode());
		else
			return (uu_decode());
	}
	v = decode2();
	if (v == EOF) {
		warnx("%s: missing or bad \"begin\" line", infile);
		return (1);
	}
	for (r = v; cflag; r |= v) {
		v = decode2();
		if (v == EOF)
			break;
	}
	return (r);
}

static int
decode2(void)
{
	int flags, fd, mode;
	size_t n, m;
	char *p, *q;
	void *handle;
	struct passwd *pw;
	struct stat st;
	char buf[PATH_MAX];

	base64 = 0;
	/* search for header line */
	for (;;) {
		if (fgets(buf, sizeof(buf), infp) == NULL)
			return (EOF);
		p = buf;
		if (strncmp(p, "begin-base64 ", 13) == 0) {
			base64 = 1;
			p += 13;
		} else if (strncmp(p, "begin ", 6) == 0)
			p += 6;
		else
			continue;
		/* p points to mode */
		q = strchr(p, ' ');
		if (q == NULL)
			continue;
		*q++ = '\0';
		/* q points to filename */
		n = strlen(q);
		while (n > 0 && (q[n-1] == '\n' || q[n-1] == '\r'))
			q[--n] = '\0';
		/* found valid header? */
		if (n > 0)
			break;
	}

	handle = setmode(p);
	if (handle == NULL) {
		warnx("%s: unable to parse file mode", infile);
		return (1);
	}
	mode = getmode(handle, 0) & 0666;
	free(handle);

	if (sflag) {
		/* don't strip, so try ~user/file expansion */
		p = NULL;
		pw = NULL;
		if (*q == '~')
			p = strchr(q, '/');
		if (p != NULL) {
			*p = '\0';
			pw = getpwnam(q + 1);
			*p = '/';
		}
		if (pw != NULL) {
			n = strlen(pw->pw_dir);
			if (buf + n > p) {
				/* make room */
				m = strlen(p);
				if (sizeof(buf) < n + m) {
					warnx("%s: bad output filename",
					    infile);
					return (1);
				}
				p = memmove(buf + n, p, m);
			}
			q = memcpy(p - n, pw->pw_dir, n);
		}
	} else {
		/* strip down to leaf name */
		p = strrchr(q, '/');
		if (p != NULL)
			q = p + 1;
	}
	if (!oflag)
		outfile = q;

	/* POSIX says "/dev/stdout" is a 'magic cookie' not a special file. */
	if (pflag || strcmp(outfile, "/dev/stdout") == 0)
		outfp = stdout;
	else {
		flags = O_WRONLY|O_CREAT|O_EXCL|O_NOFOLLOW;
		if (lstat(outfile, &st) == 0) {
			if (iflag) {
				warnc(EEXIST, "%s: %s", infile, outfile);
				return (0);
			}
			switch (st.st_mode & S_IFMT) {
			case S_IFREG:
			case S_IFLNK:
				/* avoid symlink attacks */
				if (unlink(outfile) == 0 || errno == ENOENT)
					break;
				warn("%s: unlink %s", infile, outfile);
				return (1);
			case S_IFDIR:
				warnc(EISDIR, "%s: %s", infile, outfile);
				return (1);
			default:
				if (oflag) {
					/* trust command-line names */
					flags &= ~(O_EXCL|O_NOFOLLOW);
					break;
				}
				warnc(EEXIST, "%s: %s", infile, outfile);
				return (1);
			}
		} else if (errno != ENOENT) {
			warn("%s: %s", infile, outfile);
			return (1);
		}
		if ((fd = open(outfile, flags, mode)) < 0 ||
		    (outfp = fdopen(fd, "w")) == NULL) {
			warn("%s: %s", infile, outfile);
			return (1);
		}
	}

	if (base64)
		return (base64_decode());
	else
		return (uu_decode());
}

static int
get_line(char *buf, size_t size)
{
	if (fgets(buf, size, infp) != NULL)
		return (2);
	if (rflag)
		return (0);
	warnx("%s: %s: short file", infile, outfile);
	return (1);
}

static int
checkend(const char *ptr, const char *end, const char *msg)
{
	size_t n;

	n = strlen(end);
	if (strncmp(ptr, end, n) != 0 ||
	    strspn(ptr + n, " \t\r\n") != strlen(ptr + n)) {
		warnx("%s: %s: %s", infile, outfile, msg);
		return (1);
	}
	if (fclose(outfp) != 0) {
		warn("%s: %s", infile, outfile);
		return (1);
	}
	return (0);
}

static int
uu_decode(void)
{
	int i, ch;
	char *p;
	char buf[PATH_MAX];

	/* for each input line */
	for (;;) {
		switch (get_line(buf, sizeof(buf))) {
		case 0:
			return (0);
		case 1:
			return (1);
		}

#define	DEC(c)	(((c) - ' ') & 077)		/* single character decode */
#define IS_DEC(c) ( (((c) - ' ') >= 0) && (((c) - ' ') <= 077 + 1) )

#define OUT_OF_RANGE do {						\
	warnx("%s: %s: character out of range: [%d-%d]",		\
	    infile, outfile, 1 + ' ', 077 + ' ' + 1);			\
	return (1);							\
} while (0)

		/*
		 * `i' is used to avoid writing out all the characters
		 * at the end of the file.
		 */
		p = buf;
		if ((i = DEC(*p)) <= 0)
			break;
		for (++p; i > 0; p += 4, i -= 3)
			if (i >= 3) {
				if (!(IS_DEC(*p) && IS_DEC(*(p + 1)) &&
				     IS_DEC(*(p + 2)) && IS_DEC(*(p + 3))))
					OUT_OF_RANGE;

				ch = DEC(p[0]) << 2 | DEC(p[1]) >> 4;
				putc(ch, outfp);
				ch = DEC(p[1]) << 4 | DEC(p[2]) >> 2;
				putc(ch, outfp);
				ch = DEC(p[2]) << 6 | DEC(p[3]);
				putc(ch, outfp);
			}
			else {
				if (i >= 1) {
					if (!(IS_DEC(*p) && IS_DEC(*(p + 1))))
						OUT_OF_RANGE;
					ch = DEC(p[0]) << 2 | DEC(p[1]) >> 4;
					putc(ch, outfp);
				}
				if (i >= 2) {
					if (!(IS_DEC(*(p + 1)) &&
					    IS_DEC(*(p + 2))))
						OUT_OF_RANGE;

					ch = DEC(p[1]) << 4 | DEC(p[2]) >> 2;
					putc(ch, outfp);
				}
				if (i >= 3) {
					if (!(IS_DEC(*(p + 2)) &&
					    IS_DEC(*(p + 3))))
						OUT_OF_RANGE;
					ch = DEC(p[2]) << 6 | DEC(p[3]);
					putc(ch, outfp);
				}
			}
	}
	switch (get_line(buf, sizeof(buf))) {
	case 0:
		return (0);
	case 1:
		return (1);
	default:
		return (checkend(buf, "end", "no \"end\" line"));
	}
}

static int
base64_decode(void)
{
	int n;
	char inbuf[PATH_MAX];
	unsigned char outbuf[PATH_MAX * 4];

	for (;;) {
		switch (get_line(inbuf, sizeof(inbuf))) {
		case 0:
			return (0);
		case 1:
			return (1);
		}
		n = b64_pton(inbuf, outbuf, sizeof(outbuf));
		if (n < 0)
			break;
		fwrite(outbuf, 1, n, outfp);
	}
	return (checkend(inbuf, "====",
		    "error decoding base64 input stream"));
}

static void
usage(void)
{
	switch (pmode) {
	case MODE_DECODE:
		(void)fprintf(stderr,
		    "usage: uudecode [-cimprs] [file ...]\n"
		    "       uudecode [-i] -o output_file [file]\n");
		break;
	case MODE_B64DECODE:
		(void)fprintf(stderr,
		    "usage: b64decode [-ciprs] [file ...]\n"
		    "       b64decode [-i] -o output_file [file]\n");
		break;
	}
	exit(1);
}


Generated by: GCOVR (Version 3.3)

Line	Branch	Exec	Source
1			/* $OpenBSD: uudecode.c,v 1.23 2016/01/03 14:43:20 tb Exp $ */
2			/* $FreeBSD: uudecode.c,v 1.49 2003/05/03 19:44:46 obrien Exp $ */
3
4			/*-
5			* Copyright (c) 1983, 1993
6			* The Regents of the University of California. All rights reserved.
7			*
8			* Redistribution and use in source and binary forms, with or without
9			* modification, are permitted provided that the following conditions
10			* are met:
11			* 1. Redistributions of source code must retain the above copyright
12			* notice, this list of conditions and the following disclaimer.
13			* 2. Redistributions in binary form must reproduce the above copyright
14			* notice, this list of conditions and the following disclaimer in the
15			* documentation and/or other materials provided with the distribution.
16			* 3. Neither the name of the University nor the names of its contributors
17			* may be used to endorse or promote products derived from this software
18			* without specific prior written permission.
19			*
20			* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21			* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22			* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23			* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24			* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25			* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26			* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27			* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28			* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29			* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30			* SUCH DAMAGE.
31			*/
32
33			/*
34			* Create the specified file, decoding as you go.
35			* Used with uuencode.
36			*/
37
38			#include <sys/socket.h>
39			#include <sys/stat.h>
40
41			#include <netinet/in.h>
42
43			#include <err.h>
44			#include <errno.h>
45			#include <fcntl.h>
46			#include <locale.h>
47			#include <pwd.h>
48			#include <resolv.h>
49			#include <stdio.h>
50			#include <stdlib.h>
51			#include <string.h>
52			#include <unistd.h>
53			#include <limits.h>
54
55			static const char infile, outfile;
56			static FILE infp, outfp;
57			static int base64, cflag, iflag, oflag, pflag, rflag, sflag;
58
59			static void usage(void);
60			static int decode(void);
61			static int decode2(void);
62			static int uu_decode(void);
63			static int base64_decode(void);
64
65			enum program_mode {
66			MODE_DECODE,
67			MODE_B64DECODE
68			} pmode;
69
70			int
71			main(int argc, char *argv[])
72		4	{
73			int rval, ch;
74			extern char *__progname;
75			static const char *optstr[2] = {
76			"cimo:prs",
77			"cio:prs"
78			};
79
80		4	pmode = MODE_DECODE;
81	✗✓	4	if (strcmp(__progname, "b64decode") == 0) {
82			base64 = 1;
83			pmode = MODE_B64DECODE;
84			}
85
86		4	setlocale(LC_ALL, "");
87	✓✓	12	while ((ch = getopt(argc, argv, optstr[pmode])) != -1) {
88	✗✗✗✓ ✓✗✗✗	4	switch(ch) {
89			case 'c':
90			if (oflag \|\| rflag)
91			usage();
92			cflag = 1; /* multiple uudecode'd files */
93			break;
94			case 'i':
95			iflag = 1; /* ask before override files */
96			break;
97			case 'm':
98			base64 = 1;
99			break;
100			case 'o':
101	✓✗✓✗ ✓✗✗✓	1	if (cflag \|\| pflag \|\| rflag \|\| sflag)
102			usage();
103		1	oflag = 1; /* output to the specified file */
104		1	sflag = 1; /* do not strip pathnames for output */
105		1	outfile = optarg; /* set the output filename */
106		1	break;
107			case 'p':
108	✗✓	3	if (oflag)
109			usage();
110		3	pflag = 1; /* print output to stdout */
111		3	break;
112			case 'r':
113			if (cflag \|\| oflag)
114			usage();
115			rflag = 1; /* decode raw data */
116			break;
117			case 's':
118			if (oflag)
119			usage();
120			sflag = 1; /* do not strip pathnames for output */
121			break;
122			default:
123			usage();
124			}
125			}
126		4	argc -= optind;
127		4	argv += optind;
128
129	✓✓	4	if (sflag) {
130	✗✓	1	if (pledge("stdio rpath wpath cpath getpw", NULL) == -1)
131			err(1, "pledge");
132	✗✓	3	} else if (pflag == 0) {
133			if (pledge("stdio rpath wpath cpath", NULL) == -1)
134			err(1, "pledge");
135			} else {
136	✗✓	3	if (pledge("stdio rpath wpath cpath", NULL) == -1)
137			err(1, "pledge");
138			}
139
140	✗✓	4	if (*argv) {
141			rval = 0;
142			do {
143			infp = fopen(infile = *argv, "r");
144			if (infp == NULL) {
145			warn("%s", *argv);
146			rval = 1;
147			continue;
148			}
149			rval \|= decode();
150			fclose(infp);
151			} while (*++argv);
152			} else {
153		4	infile = "stdin";
154		4	infp = stdin;
155		4	rval = decode();
156			}
157		4	exit(rval);
158			}
159
160			static int
161			decode(void)
162		4	{
163			int r, v;
164
165	✗✓	4	if (rflag) {
166			/* relaxed alternative to decode2() */
167			outfile = "/dev/stdout";
168			outfp = stdout;
169			if (base64)
170			return (base64_decode());
171			else
172			return (uu_decode());
173			}
174		4	v = decode2();
175	✗✓	4	if (v == EOF) {
176			warnx("%s: missing or bad \"begin\" line", infile);
177			return (1);
178			}
179	✗✓	4	for (r = v; cflag; r \|= v) {
180			v = decode2();
181			if (v == EOF)
182			break;
183			}
184		4	return (r);
185			}
186
187			static int
188			decode2(void)
189		4	{
190			int flags, fd, mode;
191			size_t n, m;
192			char p, q;
193			void *handle;
194			struct passwd *pw;
195			struct stat st;
196			char buf[PATH_MAX];
197
198		4	base64 = 0;
199			/* search for header line */
200			for (;;) {
201	✗✓	4	if (fgets(buf, sizeof(buf), infp) == NULL)
202			return (EOF);
203		4	p = buf;
204	✗✓	4	if (strncmp(p, "begin-base64 ", 13) == 0) {
205			base64 = 1;
206			p += 13;
207	✗✓	4	} else if (strncmp(p, "begin ", 6) == 0)
208		4	p += 6;
209			else
210			continue;
211			/* p points to mode */
212		4	q = strchr(p, ' ');
213	✗✓	4	if (q == NULL)
214			continue;
215		4	*q++ = '\0';
216			/* q points to filename */
217		4	n = strlen(q);
218	✓✗✓✓	12	while (n > 0 && (q[n-1] == '\n' \|\| q[n-1] == '\r'))
219		4	q[--n] = '\0';
220			/* found valid header? */
221	✗✓	4	if (n > 0)
222		4	break;
223			}
224
225		4	handle = setmode(p);
226	✗✓	4	if (handle == NULL) {
227			warnx("%s: unable to parse file mode", infile);
228			return (1);
229			}
230		4	mode = getmode(handle, 0) & 0666;
231		4	free(handle);
232
233	✓✓	4	if (sflag) {
234			/* don't strip, so try ~user/file expansion */
235		1	p = NULL;
236		1	pw = NULL;
237	✗✓	1	if (*q == '~')
238			p = strchr(q, '/');
239	✗✓	1	if (p != NULL) {
240			*p = '\0';
241			pw = getpwnam(q + 1);
242			*p = '/';
243			}
244	✗✓	1	if (pw != NULL) {
245			n = strlen(pw->pw_dir);
246			if (buf + n > p) {
247			/* make room */
248			m = strlen(p);
249			if (sizeof(buf) < n + m) {
250			warnx("%s: bad output filename",
251			infile);
252			return (1);
253			}
254			p = memmove(buf + n, p, m);
255			}
256			q = memcpy(p - n, pw->pw_dir, n);
257			}
258			} else {
259			/* strip down to leaf name */
260		3	p = strrchr(q, '/');
261	✗✓	3	if (p != NULL)
262			q = p + 1;
263			}
264	✓✓	4	if (!oflag)
265		3	outfile = q;
266
267			/* POSIX says "/dev/stdout" is a 'magic cookie' not a special file. */
268	✓✓✗✓	7	if (pflag \|\| strcmp(outfile, "/dev/stdout") == 0)
269		3	outfp = stdout;
270			else {
271		1	flags = O_WRONLY\|O_CREAT\|O_EXCL\|O_NOFOLLOW;
272	✓✗	1	if (lstat(outfile, &st) == 0) {
273	✗✓	1	if (iflag) {
274			warnc(EEXIST, "%s: %s", infile, outfile);
275			return (0);
276			}
277	✓✗✗	1	switch (st.st_mode & S_IFMT) {
278			case S_IFREG:
279			case S_IFLNK:
280			/* avoid symlink attacks */
281	✗✓✗✗	1	if (unlink(outfile) == 0 \|\| errno == ENOENT)
282			break;
283			warn("%s: unlink %s", infile, outfile);
284			return (1);
285			case S_IFDIR:
286			warnc(EISDIR, "%s: %s", infile, outfile);
287			return (1);
288			default:
289			if (oflag) {
290			/* trust command-line names */
291			flags &= ~(O_EXCL\|O_NOFOLLOW);
292			break;
293			}
294			warnc(EEXIST, "%s: %s", infile, outfile);
295			return (1);
296			}
297			} else if (errno != ENOENT) {
298			warn("%s: %s", infile, outfile);
299			return (1);
300			}
301	✓✗✗✓	1	if ((fd = open(outfile, flags, mode)) < 0 \|\|
302			(outfp = fdopen(fd, "w")) == NULL) {
303			warn("%s: %s", infile, outfile);
304			return (1);
305			}
306			}
307
308	✗✓	4	if (base64)
309			return (base64_decode());
310			else
311		4	return (uu_decode());
312			}
313
314			static int
315			get_line(char *buf, size_t size)
316		51	{
317	✓✗	51	if (fgets(buf, size, infp) != NULL)
318		51	return (2);
319			if (rflag)
320			return (0);
321			warnx("%s: %s: short file", infile, outfile);
322			return (1);
323			}
324
325			static int
326			checkend(const char ptr, const char end, const char *msg)
327		4	{
328			size_t n;
329
330		4	n = strlen(end);
331	✓✗✗✓	4	if (strncmp(ptr, end, n) != 0 \|\|
332			strspn(ptr + n, " \t\r\n") != strlen(ptr + n)) {
333			warnx("%s: %s: %s", infile, outfile, msg);
334			return (1);
335			}
336	✗✓	4	if (fclose(outfp) != 0) {
337			warn("%s: %s", infile, outfile);
338			return (1);
339			}
340		4	return (0);
341			}
342
343			static int
344			uu_decode(void)
345		47	{
346			int i, ch;
347			char *p;
348			char buf[PATH_MAX];
349
350			/* for each input line */
351			for (;;) {
352	✗✗✓	47	switch (get_line(buf, sizeof(buf))) {
353			case 0:
354			return (0);
355			case 1:
356			return (1);
357			}
358
359			#define DEC(c) (((c) - ' ') & 077) /* single character decode */
360			#define IS_DEC(c) ( (((c) - ' ') >= 0) && (((c) - ' ') <= 077 + 1) )
361
362			#define OUT_OF_RANGE do { \
363			warnx("%s: %s: character out of range: [%d-%d]", \
364			infile, outfile, 1 + ' ', 077 + ' ' + 1); \
365			return (1); \
366			} while (0)
367
368			/*
369			* `i' is used to avoid writing out all the characters
370			* at the end of the file.
371			*/
372		47	p = buf;
373	✓✓	47	if ((i = DEC(*p)) <= 0)
374		4	break;
375	✓✓	664	for (++p; i > 0; p += 4, i -= 3)
376	✓✓	621	if (i >= 3) {
377	✓✗✓✗ ✓✗✗✓	619	if (!(IS_DEC(p) && IS_DEC((p + 1)) &&
378			IS_DEC((p + 2)) && IS_DEC((p + 3))))
379			OUT_OF_RANGE;
380
381		619	ch = DEC(p[0]) << 2 \| DEC(p[1]) >> 4;
382	✓✗	619	putc(ch, outfp);
383		619	ch = DEC(p[1]) << 4 \| DEC(p[2]) >> 2;
384	✓✗	619	putc(ch, outfp);
385		619	ch = DEC(p[2]) << 6 \| DEC(p[3]);
386	✓✗	619	putc(ch, outfp);
387			}
388			else {
389	✓✗	2	if (i >= 1) {
390	✓✗✗✓	2	if (!(IS_DEC(p) && IS_DEC((p + 1))))
391			OUT_OF_RANGE;
392		2	ch = DEC(p[0]) << 2 \| DEC(p[1]) >> 4;
393	✓✗	2	putc(ch, outfp);
394			}
395	✗✓	2	if (i >= 2) {
396			if (!(IS_DEC(*(p + 1)) &&
397			IS_DEC(*(p + 2))))
398			OUT_OF_RANGE;
399
400			ch = DEC(p[1]) << 4 \| DEC(p[2]) >> 2;
401			putc(ch, outfp);
402			}
403	✗✓	2	if (i >= 3) {
404			if (!(IS_DEC(*(p + 2)) &&
405			IS_DEC(*(p + 3))))
406			OUT_OF_RANGE;
407			ch = DEC(p[2]) << 6 \| DEC(p[3]);
408			putc(ch, outfp);
409			}
410			}
411			}
412	✗✗✓	4	switch (get_line(buf, sizeof(buf))) {
413			case 0:
414			return (0);
415			case 1:
416			return (1);
417			default:
418		4	return (checkend(buf, "end", "no \"end\" line"));
419			}
420			}
421
422			static int
423			base64_decode(void)
424			{
425			int n;
426			char inbuf[PATH_MAX];
427			unsigned char outbuf[PATH_MAX * 4];
428
429			for (;;) {
430			switch (get_line(inbuf, sizeof(inbuf))) {
431			case 0:
432			return (0);
433			case 1:
434			return (1);
435			}
436			n = b64_pton(inbuf, outbuf, sizeof(outbuf));
437			if (n < 0)
438			break;
439			fwrite(outbuf, 1, n, outfp);
440			}
441			return (checkend(inbuf, "====",
442			"error decoding base64 input stream"));
443			}
444
445			static void
446			usage(void)
447			{
448			switch (pmode) {
449			case MODE_DECODE:
450			(void)fprintf(stderr,
451			"usage: uudecode [-cimprs] [file ...]\n"
452			" uudecode [-i] -o output_file [file]\n");
453			break;
454			case MODE_B64DECODE:
455			(void)fprintf(stderr,
456			"usage: b64decode [-ciprs] [file ...]\n"
457			" b64decode [-i] -o output_file [file]\n");
458			break;
459			}
460			exit(1);
461			}