Head

GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	usr.bin/cap_mkdb/cap_mkdb.c	Lines:	7	100	7.0 %
Date:	2017-11-07	Branches:	3	61	4.9 %


/*	$OpenBSD: cap_mkdb.c,v 1.22 2015/12/04 19:15:54 jmc Exp $	*/
/*	$NetBSD: cap_mkdb.c,v 1.5 1995/09/02 05:47:12 jtc Exp $	*/

/*-
 * Copyright (c) 1992, 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.
 */

#include <sys/stat.h>

#include <db.h>
#include <err.h>
#include <errno.h>
#include <fcntl.h>
#include <limits.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include <unistd.h>

#define MINIMUM(a, b)	(((a) < (b)) ? (a) : (b))
#define MAXIMUM(a, b)	(((a) > (b)) ? (a) : (b))

void	 db_build(char **);
void	 dounlink(void);
void	 usage(void);
int	 igetnext(char **, char **);
int	 main(int, char *[]);

DB *capdbp;
int verbose;
char *capname, buf[8 * 1024];

HASHINFO openinfo = {
	4096,		/* bsize */
	16,		/* ffactor */
	256,		/* nelem */
	2048 * 1024,	/* cachesize */
	NULL,		/* hash() */
	0		/* lorder */
};

/*
 * cap_mkdb creates a capability hash database for quick retrieval of capability
 * records.  The database contains 2 types of entries: records and references
 * marked by the first byte in the data.  A record entry contains the actual
 * capability record whereas a reference contains the name (key) under which
 * the correct record is stored.
 */
int
main(int argc, char *argv[])
{
	int c;

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

	capname = NULL;
	while ((c = getopt(argc, argv, "f:iv")) != -1) {
		switch(c) {
		case 'f':
			capname = optarg;
			break;
		case 'v':
			verbose = 1;
			break;
		case '?':
		default:
			usage();
		}
	}
	argc -= optind;
	argv += optind;

	if (*argv == NULL)
		usage();

	/*
	 * The database file is the first argument if no name is specified.
	 * Make arrangements to unlink it if we exit badly.
	 */
	(void)snprintf(buf, sizeof(buf), "%s.db", capname ? capname : *argv);
	if ((capname = strdup(buf)) == NULL)
		err(1, NULL);
	if ((capdbp = dbopen(capname, O_CREAT | O_TRUNC | O_RDWR,
	    DEFFILEMODE, DB_HASH, &openinfo)) == NULL)
		err(1, "%s", buf);

	if (atexit(dounlink))
		err(1, "atexit");

	db_build(argv);

	if (capdbp->close(capdbp) < 0)
		err(1, "%s", capname);
	capname = NULL;
	exit(0);
}

void
dounlink(void)
{
	if (capname != NULL)
		(void)unlink(capname);
}

/*
 * Any changes to these definitions should be made also in the getcap(3)
 * library routines.
 */
#define RECOK	(char)0
#define TCERR	(char)1
#define SHADOW	(char)2

/*
 * db_build() builds the name and capability databases according to the
 * details above.
 */
void
db_build(char **ifiles)
{
	DBT key, data;
	recno_t reccnt;
	size_t len, bplen;
	int st;
	char *bp, *p, *t, *capbeg, *capend;

	cgetusedb(0);		/* disable reading of .db files in getcap(3) */

	data.data = NULL;
	key.data = NULL;
	for (reccnt = 0, bplen = 0; (st = cgetnext(&bp, ifiles)) > 0;) {

		/*
		 * Allocate enough memory to store the size of the record plus
		 * a terminating NULL and one extra byte.
		 */
		len = strlen(bp);
		if (bplen <= len + 2) {
			int newbplen = bplen + MAXIMUM(256, len + 2);
			void *newdata;

			if ((newdata = realloc(data.data, newbplen)) == NULL)
				err(1, NULL);
			data.data = newdata;
			bplen = newbplen;
		}

		/* Find the end of the name field. */
		if ((p = strchr(bp, ':')) == NULL) {
			warnx("no name field: %.*s", (int)MINIMUM(len, 20), bp);
			continue;
		}

		/* First byte of stored record indicates status. */
		switch(st) {
		case 1:
			((char *)(data.data))[0] = RECOK;
			break;
		case 2:
			((char *)(data.data))[0] = TCERR;
			warnx("Record not tc expanded: %.*s", (int)(p - bp), bp);
			break;
		}

		/* Create the stored record. */
		t = (char *)data.data + 1;
		/* Copy the cap name and trailing ':' */
		len = p - bp + 1;
		memcpy(t, bp, len);
		t += len;

		/* Copy entry, collapsing empty fields. */
		capbeg = p + 1;
		while (*capbeg) {
			/* Skip empty fields. */
			if ((len = strspn(capbeg, ": \t\n\r")))
				capbeg += len;

			/* Find the end of this cap and copy it w/ : */
			capend = strchr(capbeg, ':');
			if (capend)
				len = capend - capbeg + 1;
			else
				len = strlen(capbeg);
			memcpy(t, capbeg, len);
			t += len;
			capbeg += len;
		}
		*t = '\0';
		data.size = t - (char *)data.data + 1;

		/* Store the record under the name field. */
		key.data = bp;
		key.size = p - bp;

		switch(capdbp->put(capdbp, &key, &data, R_NOOVERWRITE)) {
		case -1:
			err(1, "put");
			/* NOTREACHED */
		case 1:
			warnx("ignored duplicate: %.*s",
			    (int)key.size, (char *)key.data);
			continue;
		}
		++reccnt;

		/* If only one name, ignore the rest. */
		if ((p = strchr(bp, '|')) == NULL)
			continue;

		/* The rest of the names reference the entire name. */
		((char *)(data.data))[0] = SHADOW;
		(void) memmove(&((u_char *)(data.data))[1], key.data, key.size);
		data.size = key.size + 1;

		/* Store references for other names. */
		for (p = t = bp;; ++p) {
			if (p > t && (*p == ':' || *p == '|')) {
				key.size = p - t;
				key.data = t;

				/*
				 * If this is the last entry and contains any
				 * spaces, it is a description rather than an
				 * alias, so skip it and break.
				 */
				if (*p != '|' &&
				    memchr(key.data, ' ', key.size) != NULL)
					break;

				switch(capdbp->put(capdbp,
				    &key, &data, R_NOOVERWRITE)) {
				case -1:
					err(1, "put");
					/* NOTREACHED */
				case 1:
					warnx("ignored duplicate: %.*s",
					      (int)key.size, (char *)key.data);
				}
				t = p + 1;
			}
			if (*p == ':')
				break;
		}
		free(bp);
	}

	switch(st) {
	case -1:
		err(1, "file argument");
		/* NOTREACHED */
	case -2:
		errx(1, "potential reference loop detected");
		/* NOTREACHED */
	}

	if (verbose)
		(void)printf("cap_mkdb: %d capability records\n", reccnt);
}

void
usage(void)
{
	(void)fprintf(stderr,
	    "usage: cap_mkdb [-v] [-f outfile] file1 [file2 ...]\n");
	exit(1);
}


Generated by: GCOVR (Version 3.3)

Line	Branch	Exec	Source
1			/* $OpenBSD: cap_mkdb.c,v 1.22 2015/12/04 19:15:54 jmc Exp $ */
2			/* $NetBSD: cap_mkdb.c,v 1.5 1995/09/02 05:47:12 jtc Exp $ */
3
4			/*-
5			* Copyright (c) 1992, 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			#include <sys/stat.h>
34
35			#include <db.h>
36			#include <err.h>
37			#include <errno.h>
38			#include <fcntl.h>
39			#include <limits.h>
40			#include <stdio.h>
41			#include <stdlib.h>
42			#include <string.h>
43			#include <ctype.h>
44			#include <unistd.h>
45
46			#define MINIMUM(a, b) (((a) < (b)) ? (a) : (b))
47			#define MAXIMUM(a, b) (((a) > (b)) ? (a) : (b))
48
49			void db_build(char **);
50			void dounlink(void);
51			void usage(void);
52			int igetnext(char , char );
53			int main(int, char *[]);
54
55			DB *capdbp;
56			int verbose;
57			char capname, buf[8 1024];
58
59			HASHINFO openinfo = {
60			4096, /* bsize */
61			16, /* ffactor */
62			256, /* nelem */
63			2048 * 1024, /* cachesize */
64			NULL, /* hash() */
65			0 /* lorder */
66			};
67
68			/*
69			* cap_mkdb creates a capability hash database for quick retrieval of capability
70			* records. The database contains 2 types of entries: records and references
71			* marked by the first byte in the data. A record entry contains the actual
72			* capability record whereas a reference contains the name (key) under which
73			* the correct record is stored.
74			*/
75			int
76			main(int argc, char *argv[])
77			{
78			int c;
79
80	✗✓	2	if (pledge("stdio rpath wpath cpath flock", NULL) == -1)
81			err(1, "pledge");
82
83		1	capname = NULL;
84	✓✗	2	while ((c = getopt(argc, argv, "f:iv")) != -1) {
85	✗✗✓	1	switch(c) {
86			case 'f':
87			capname = optarg;
88			break;
89			case 'v':
90			verbose = 1;
91			break;
92			case '?':
93			default:
94		1	usage();
95		1	}
96			}
97			argc -= optind;
98			argv += optind;
99
100			if (*argv == NULL)
101			usage();
102
103			/*
104			* The database file is the first argument if no name is specified.
105			* Make arrangements to unlink it if we exit badly.
106			*/
107			(void)snprintf(buf, sizeof(buf), "%s.db", capname ? capname : *argv);
108			if ((capname = strdup(buf)) == NULL)
109			err(1, NULL);
110			if ((capdbp = dbopen(capname, O_CREAT \| O_TRUNC \| O_RDWR,
111			DEFFILEMODE, DB_HASH, &openinfo)) == NULL)
112			err(1, "%s", buf);
113
114			if (atexit(dounlink))
115			err(1, "atexit");
116
117			db_build(argv);
118
119			if (capdbp->close(capdbp) < 0)
120			err(1, "%s", capname);
121			capname = NULL;
122			exit(0);
123			}
124
125			void
126			dounlink(void)
127			{
128			if (capname != NULL)
129			(void)unlink(capname);
130			}
131
132			/*
133			* Any changes to these definitions should be made also in the getcap(3)
134			* library routines.
135			*/
136			#define RECOK (char)0
137			#define TCERR (char)1
138			#define SHADOW (char)2
139
140			/*
141			* db_build() builds the name and capability databases according to the
142			* details above.
143			*/
144			void
145			db_build(char **ifiles)
146			{
147			DBT key, data;
148			recno_t reccnt;
149			size_t len, bplen;
150			int st;
151			char bp, p, t, capbeg, *capend;
152
153			cgetusedb(0); /* disable reading of .db files in getcap(3) */
154
155			data.data = NULL;
156			key.data = NULL;
157			for (reccnt = 0, bplen = 0; (st = cgetnext(&bp, ifiles)) > 0;) {
158
159			/*
160			* Allocate enough memory to store the size of the record plus
161			* a terminating NULL and one extra byte.
162			*/
163			len = strlen(bp);
164			if (bplen <= len + 2) {
165			int newbplen = bplen + MAXIMUM(256, len + 2);
166			void *newdata;
167
168			if ((newdata = realloc(data.data, newbplen)) == NULL)
169			err(1, NULL);
170			data.data = newdata;
171			bplen = newbplen;
172			}
173
174			/* Find the end of the name field. */
175			if ((p = strchr(bp, ':')) == NULL) {
176			warnx("no name field: %.*s", (int)MINIMUM(len, 20), bp);
177			continue;
178			}
179
180			/* First byte of stored record indicates status. */
181			switch(st) {
182			case 1:
183			((char *)(data.data))[0] = RECOK;
184			break;
185			case 2:
186			((char *)(data.data))[0] = TCERR;
187			warnx("Record not tc expanded: %.*s", (int)(p - bp), bp);
188			break;
189			}
190
191			/* Create the stored record. */
192			t = (char *)data.data + 1;
193			/* Copy the cap name and trailing ':' */
194			len = p - bp + 1;
195			memcpy(t, bp, len);
196			t += len;
197
198			/* Copy entry, collapsing empty fields. */
199			capbeg = p + 1;
200			while (*capbeg) {
201			/* Skip empty fields. */
202			if ((len = strspn(capbeg, ": \t\n\r")))
203			capbeg += len;
204
205			/* Find the end of this cap and copy it w/ : */
206			capend = strchr(capbeg, ':');
207			if (capend)
208			len = capend - capbeg + 1;
209			else
210			len = strlen(capbeg);
211			memcpy(t, capbeg, len);
212			t += len;
213			capbeg += len;
214			}
215			*t = '\0';
216			data.size = t - (char *)data.data + 1;
217
218			/* Store the record under the name field. */
219			key.data = bp;
220			key.size = p - bp;
221
222			switch(capdbp->put(capdbp, &key, &data, R_NOOVERWRITE)) {
223			case -1:
224			err(1, "put");
225			/* NOTREACHED */
226			case 1:
227			warnx("ignored duplicate: %.*s",
228			(int)key.size, (char *)key.data);
229			continue;
230			}
231			++reccnt;
232
233			/* If only one name, ignore the rest. */
234			if ((p = strchr(bp, '\|')) == NULL)
235			continue;
236
237			/* The rest of the names reference the entire name. */
238			((char *)(data.data))[0] = SHADOW;
239			(void) memmove(&((u_char *)(data.data))[1], key.data, key.size);
240			data.size = key.size + 1;
241
242			/* Store references for other names. */
243			for (p = t = bp;; ++p) {
244			if (p > t && (p == ':' \|\| p == '\|')) {
245			key.size = p - t;
246			key.data = t;
247
248			/*
249			* If this is the last entry and contains any
250			* spaces, it is a description rather than an
251			* alias, so skip it and break.
252			*/
253			if (*p != '\|' &&
254			memchr(key.data, ' ', key.size) != NULL)
255			break;
256
257			switch(capdbp->put(capdbp,
258			&key, &data, R_NOOVERWRITE)) {
259			case -1:
260			err(1, "put");
261			/* NOTREACHED */
262			case 1:
263			warnx("ignored duplicate: %.*s",
264			(int)key.size, (char *)key.data);
265			}
266			t = p + 1;
267			}
268			if (*p == ':')
269			break;
270			}
271			free(bp);
272			}
273
274			switch(st) {
275			case -1:
276			err(1, "file argument");
277			/* NOTREACHED */
278			case -2:
279			errx(1, "potential reference loop detected");
280			/* NOTREACHED */
281			}
282
283			if (verbose)
284			(void)printf("cap_mkdb: %d capability records\n", reccnt);
285			}
286
287			void
288			usage(void)
289			{
290		1	(void)fprintf(stderr,
291			"usage: cap_mkdb [-v] [-f outfile] file1 [file2 ...]\n");
292			exit(1);
293			}