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GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	lib/libc/gen/pwcache.c	Lines:	0	46	0.0 %
Date:	2017-11-13	Branches:	0	28	0.0 %


/*	$OpenBSD: pwcache.c,v 1.13 2015/11/25 23:16:01 jcs Exp $ */
/*
 * Copyright (c) 1989, 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/types.h>

#include <grp.h>
#include <pwd.h>
#include <stdio.h>
#include <string.h>

#define	NCACHE	16			/* power of 2 */
#define	NLINES	4			/* associativity */
#define	MASK	(NCACHE - 1)		/* bits to store with */
#define	IDX(x, i)	((x & MASK) + i * NCACHE)

char *
user_from_uid(uid_t uid, int nouser)
{
	static struct ncache {
		uid_t	uid;
		short	noname;
		char	name[_PW_NAME_LEN + 1];
	} c_uid[NLINES * NCACHE];
	char pwbuf[_PW_BUF_LEN];
	struct passwd pwstore, *pw;
	struct ncache *cp;
	unsigned int i;

	for (i = 0; i < NLINES; i++) {
		cp = &c_uid[IDX(uid, i)];
		if (!*cp->name) {
fillit:
			cp->uid = uid;
			pw = NULL;
			getpwuid_r(uid, &pwstore, pwbuf, sizeof(pwbuf), &pw);
			if (pw == NULL) {
				snprintf(cp->name, sizeof(cp->name), "%u", uid);
				cp->noname = 1;
			} else {
				strlcpy(cp->name, pw->pw_name, sizeof(cp->name));
			}
		}
		if (cp->uid == uid) {
			if (nouser && cp->noname)
				return NULL;
			return cp->name;
		}
	}
	/* move everybody down a slot */
	for (i = 0; i < NLINES - 1; i++) {
		struct ncache *next;

		cp = &c_uid[IDX(uid, i)];
		next = &c_uid[IDX(uid, i + 1)];
		memcpy(next, cp, sizeof(*cp));
	}
	cp = &c_uid[IDX(uid, 0)];
	goto fillit;
}

char *
group_from_gid(gid_t gid, int nogroup)
{
	static struct ncache {
		gid_t	gid;
		short 	noname;
		char	name[_PW_NAME_LEN + 1];
	} c_gid[NLINES * NCACHE];
	char grbuf[_GR_BUF_LEN];
	struct group grstore, *gr;
	struct ncache *cp;
	unsigned int i;

	for (i = 0; i < NLINES; i++) {
		cp = &c_gid[IDX(gid, i)];
		if (!*cp->name) {
fillit:
			cp->gid = gid;
			gr = NULL;
			getgrgid_r(gid, &grstore, grbuf, sizeof(grbuf), &gr);
			if (gr == NULL) {
				snprintf(cp->name, sizeof(cp->name), "%u", gid);
				cp->noname = 1;
			} else {
				strlcpy(cp->name, gr->gr_name, sizeof(cp->name));
			}
		}
		if (cp->gid == gid) {
			if (nogroup && cp->noname)
				return NULL;
			return cp->name;
		}
	}
	/* move everybody down a slot */
	for (i = 0; i < NLINES - 1; i++) {
		struct ncache *next;

		cp = &c_gid[IDX(gid, i)];
		next = &c_gid[IDX(gid, i + 1)];
		memcpy(next, cp, sizeof(*cp));
	}
	cp = &c_gid[IDX(gid, 0)];
	goto fillit;
}


Generated by: GCOVR (Version 3.3)

Line	Branch	Exec	Source
1			/* $OpenBSD: pwcache.c,v 1.13 2015/11/25 23:16:01 jcs Exp $ */
2			/*
3			* Copyright (c) 1989, 1993
4			* The Regents of the University of California. All rights reserved.
5			*
6			* Redistribution and use in source and binary forms, with or without
7			* modification, are permitted provided that the following conditions
8			* are met:
9			* 1. Redistributions of source code must retain the above copyright
10			* notice, this list of conditions and the following disclaimer.
11			* 2. Redistributions in binary form must reproduce the above copyright
12			* notice, this list of conditions and the following disclaimer in the
13			* documentation and/or other materials provided with the distribution.
14			* 3. Neither the name of the University nor the names of its contributors
15			* may be used to endorse or promote products derived from this software
16			* without specific prior written permission.
17			*
18			* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
19			* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20			* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21			* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
22			* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
23			* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
24			* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25			* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
26			* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
27			* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28			* SUCH DAMAGE.
29			*/
30
31			#include <sys/types.h>
32
33			#include <grp.h>
34			#include <pwd.h>
35			#include <stdio.h>
36			#include <string.h>
37
38			#define NCACHE 16 /* power of 2 */
39			#define NLINES 4 /* associativity */
40			#define MASK (NCACHE - 1) /* bits to store with */
41			#define IDX(x, i) ((x & MASK) + i * NCACHE)
42
43			char *
44			user_from_uid(uid_t uid, int nouser)
45			{
46			static struct ncache {
47			uid_t uid;
48			short noname;
49			char name[_PW_NAME_LEN + 1];
50			} c_uid[NLINES * NCACHE];
51			char pwbuf[_PW_BUF_LEN];
52			struct passwd pwstore, *pw;
53			struct ncache *cp;
54			unsigned int i;
55
56			for (i = 0; i < NLINES; i++) {
57			cp = &c_uid[IDX(uid, i)];
58			if (!*cp->name) {
59			fillit:
60			cp->uid = uid;
61			pw = NULL;
62			getpwuid_r(uid, &pwstore, pwbuf, sizeof(pwbuf), &pw);
63			if (pw == NULL) {
64			snprintf(cp->name, sizeof(cp->name), "%u", uid);
65			cp->noname = 1;
66			} else {
67			strlcpy(cp->name, pw->pw_name, sizeof(cp->name));
68			}
69			}
70			if (cp->uid == uid) {
71			if (nouser && cp->noname)
72			return NULL;
73			return cp->name;
74			}
75			}
76			/* move everybody down a slot */
77			for (i = 0; i < NLINES - 1; i++) {
78			struct ncache *next;
79
80			cp = &c_uid[IDX(uid, i)];
81			next = &c_uid[IDX(uid, i + 1)];
82			memcpy(next, cp, sizeof(*cp));
83			}
84			cp = &c_uid[IDX(uid, 0)];
85			goto fillit;
86			}
87
88			char *
89			group_from_gid(gid_t gid, int nogroup)
90			{
91			static struct ncache {
92			gid_t gid;
93			short noname;
94			char name[_PW_NAME_LEN + 1];
95			} c_gid[NLINES * NCACHE];
96			char grbuf[_GR_BUF_LEN];
97			struct group grstore, *gr;
98			struct ncache *cp;
99			unsigned int i;
100
101			for (i = 0; i < NLINES; i++) {
102			cp = &c_gid[IDX(gid, i)];
103			if (!*cp->name) {
104			fillit:
105			cp->gid = gid;
106			gr = NULL;
107			getgrgid_r(gid, &grstore, grbuf, sizeof(grbuf), &gr);
108			if (gr == NULL) {
109			snprintf(cp->name, sizeof(cp->name), "%u", gid);
110			cp->noname = 1;
111			} else {
112			strlcpy(cp->name, gr->gr_name, sizeof(cp->name));
113			}
114			}
115			if (cp->gid == gid) {
116			if (nogroup && cp->noname)
117			return NULL;
118			return cp->name;
119			}
120			}
121			/* move everybody down a slot */
122			for (i = 0; i < NLINES - 1; i++) {
123			struct ncache *next;
124
125			cp = &c_gid[IDX(gid, i)];
126			next = &c_gid[IDX(gid, i + 1)];
127			memcpy(next, cp, sizeof(*cp));
128			}
129			cp = &c_gid[IDX(gid, 0)];
130			goto fillit;
131			}