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GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	lib/libc/stdlib/setenv.c	Lines:	0	69	0.0 %
Date:	2017-11-13	Branches:	0	72	0.0 %


/*	$OpenBSD: setenv.c,v 1.19 2016/09/21 04:38:56 guenther Exp $ */
/*
 * Copyright (c) 1987 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 <errno.h>
#include <stdlib.h>
#include <string.h>

static char **lastenv;				/* last value of environ */

/*
 * putenv --
 *	Add a name=value string directly to the environmental, replacing
 *	any current value.
 */
int
putenv(char *str)
{
	char **P, *cp;
	size_t cnt = 0;
	int offset = 0;

	for (cp = str; *cp && *cp != '='; ++cp)
		;
	if (*cp != '=') {
		errno = EINVAL;
		return (-1);			/* missing `=' in string */
	}

	if (__findenv(str, (int)(cp - str), &offset) != NULL) {
		environ[offset++] = str;
		/* could be set multiple times */
		while (__findenv(str, (int)(cp - str), &offset)) {
			for (P = &environ[offset];; ++P)
				if (!(*P = *(P + 1)))
					break;
		}
		return (0);
	}

	/* create new slot for string */
	if (environ != NULL) {
		for (P = environ; *P != NULL; P++)
			;
		cnt = P - environ;
	}
	P = reallocarray(lastenv, cnt + 2, sizeof(char *));
	if (!P)
		return (-1);
	if (lastenv != environ && environ != NULL)
		memcpy(P, environ, cnt * sizeof(char *));
	lastenv = environ = P;
	environ[cnt] = str;
	environ[cnt + 1] = NULL;
	return (0);
}
DEF_WEAK(putenv);

/*
 * setenv --
 *	Set the value of the environmental variable "name" to be
 *	"value".  If rewrite is set, replace any current value.
 */
int
setenv(const char *name, const char *value, int rewrite)
{
	char *C, **P;
	const char *np;
	int l_value, offset = 0;

	if (!name || !*name) {
		errno = EINVAL;
		return (-1);
	}
	for (np = name; *np && *np != '='; ++np)
		;
	if (*np) {
		errno = EINVAL;
		return (-1);			/* has `=' in name */
	}

	l_value = strlen(value);
	if ((C = __findenv(name, (int)(np - name), &offset)) != NULL) {
		int tmpoff = offset + 1;
		if (!rewrite)
			return (0);
#if 0 /* XXX - existing entry may not be writable */
		if (strlen(C) >= l_value) {	/* old larger; copy over */
			while ((*C++ = *value++))
				;
			return (0);
		}
#endif
		/* could be set multiple times */
		while (__findenv(name, (int)(np - name), &tmpoff)) {
			for (P = &environ[tmpoff];; ++P)
				if (!(*P = *(P + 1)))
					break;
		}
	} else {					/* create new slot */
		size_t cnt = 0;

		if (environ != NULL) {
			for (P = environ; *P != NULL; P++)
				;
			cnt = P - environ;
		}
		P = reallocarray(lastenv, cnt + 2, sizeof(char *));
		if (!P)
			return (-1);
		if (lastenv != environ && environ != NULL)
			memcpy(P, environ, cnt * sizeof(char *));
		lastenv = environ = P;
		offset = cnt;
		environ[cnt + 1] = NULL;
	}
	if (!(environ[offset] =			/* name + `=' + value */
	    malloc((int)(np - name) + l_value + 2)))
		return (-1);
	for (C = environ[offset]; (*C = *name++) && *C != '='; ++C)
		;
	for (*C++ = '='; (*C++ = *value++); )
		;
	return (0);
}
DEF_WEAK(setenv);

/*
 * unsetenv(name) --
 *	Delete environmental variable "name".
 */
int
unsetenv(const char *name)
{
	char **P;
	const char *np;
	int offset = 0;

	if (!name || !*name) {
		errno = EINVAL;
		return (-1);
	}
	for (np = name; *np && *np != '='; ++np)
		;
	if (*np) {
		errno = EINVAL;
		return (-1);			/* has `=' in name */
	}

	/* could be set multiple times */
	while (__findenv(name, (int)(np - name), &offset)) {
		for (P = &environ[offset];; ++P)
			if (!(*P = *(P + 1)))
				break;
	}
	return (0);
}
DEF_WEAK(unsetenv);


Generated by: GCOVR (Version 3.3)

Line	Branch	Exec	Source
1			/* $OpenBSD: setenv.c,v 1.19 2016/09/21 04:38:56 guenther Exp $ */
2			/*
3			* Copyright (c) 1987 Regents of the University of California.
4			* 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 <errno.h>
32			#include <stdlib.h>
33			#include <string.h>
34
35			static char *lastenv; / last value of environ */
36
37			/*
38			* putenv --
39			* Add a name=value string directly to the environmental, replacing
40			* any current value.
41			*/
42			int
43			putenv(char *str)
44			{
45			char *P, cp;
46			size_t cnt = 0;
47			int offset = 0;
48
49			for (cp = str; cp && cp != '='; ++cp)
50			;
51			if (*cp != '=') {
52			errno = EINVAL;
53			return (-1); /* missing `=' in string */
54			}
55
56			if (__findenv(str, (int)(cp - str), &offset) != NULL) {
57			environ[offset++] = str;
58			/* could be set multiple times */
59			while (__findenv(str, (int)(cp - str), &offset)) {
60			for (P = &environ[offset];; ++P)
61			if (!(P = (P + 1)))
62			break;
63			}
64			return (0);
65			}
66
67			/* create new slot for string */
68			if (environ != NULL) {
69			for (P = environ; *P != NULL; P++)
70			;
71			cnt = P - environ;
72			}
73			P = reallocarray(lastenv, cnt + 2, sizeof(char *));
74			if (!P)
75			return (-1);
76			if (lastenv != environ && environ != NULL)
77			memcpy(P, environ, cnt * sizeof(char *));
78			lastenv = environ = P;
79			environ[cnt] = str;
80			environ[cnt + 1] = NULL;
81			return (0);
82			}
83			DEF_WEAK(putenv);
84
85			/*
86			* setenv --
87			* Set the value of the environmental variable "name" to be
88			* "value". If rewrite is set, replace any current value.
89			*/
90			int
91			setenv(const char name, const char value, int rewrite)
92			{
93			char C, *P;
94			const char *np;
95			int l_value, offset = 0;
96
97			if (!name \|\| !*name) {
98			errno = EINVAL;
99			return (-1);
100			}
101			for (np = name; np && np != '='; ++np)
102			;
103			if (*np) {
104			errno = EINVAL;
105			return (-1); /* has `=' in name */
106			}
107
108			l_value = strlen(value);
109			if ((C = __findenv(name, (int)(np - name), &offset)) != NULL) {
110			int tmpoff = offset + 1;
111			if (!rewrite)
112			return (0);
113			#if 0 /* XXX - existing entry may not be writable */
114			if (strlen(C) >= l_value) { /* old larger; copy over */
115			while ((C++ = value++))
116			;
117			return (0);
118			}
119			#endif
120			/* could be set multiple times */
121			while (__findenv(name, (int)(np - name), &tmpoff)) {
122			for (P = &environ[tmpoff];; ++P)
123			if (!(P = (P + 1)))
124			break;
125			}
126			} else { /* create new slot */
127			size_t cnt = 0;
128
129			if (environ != NULL) {
130			for (P = environ; *P != NULL; P++)
131			;
132			cnt = P - environ;
133			}
134			P = reallocarray(lastenv, cnt + 2, sizeof(char *));
135			if (!P)
136			return (-1);
137			if (lastenv != environ && environ != NULL)
138			memcpy(P, environ, cnt * sizeof(char *));
139			lastenv = environ = P;
140			offset = cnt;
141			environ[cnt + 1] = NULL;
142			}
143			if (!(environ[offset] = /* name + `=' + value */
144			malloc((int)(np - name) + l_value + 2)))
145			return (-1);
146			for (C = environ[offset]; (C = name++) && *C != '='; ++C)
147			;
148			for (C++ = '='; (C++ = *value++); )
149			;
150			return (0);
151			}
152			DEF_WEAK(setenv);
153
154			/*
155			* unsetenv(name) --
156			* Delete environmental variable "name".
157			*/
158			int
159			unsetenv(const char *name)
160			{
161			char **P;
162			const char *np;
163			int offset = 0;
164
165			if (!name \|\| !*name) {
166			errno = EINVAL;
167			return (-1);
168			}
169			for (np = name; np && np != '='; ++np)
170			;
171			if (*np) {
172			errno = EINVAL;
173			return (-1); /* has `=' in name */
174			}
175
176			/* could be set multiple times */
177			while (__findenv(name, (int)(np - name), &offset)) {
178			for (P = &environ[offset];; ++P)
179			if (!(P = (P + 1)))
180			break;
181			}
182			return (0);
183			}
184			DEF_WEAK(unsetenv);