1 /*
2 * Copyright (c) 2000 Kungliga Tekniska Högskolan
3 * (Royal Institute of Technology, Stockholm, Sweden).
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 *
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 *
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 *
17 * 3. Neither the name of the Institute nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 */
33
34 #include "login_locl.h"
35 RCSID("$Id$");
36
37 /*
38 * the environment we will send to execle and the shell.
39 */
40
41 char **env;
42 int num_env;
43
44 void
extend_env(char * str)45 extend_env(char *str)
46 {
47 env = realloc(env, (num_env + 1) * sizeof(*env));
48 if(env == NULL)
49 errx(1, "Out of memory!");
50 env[num_env++] = str;
51 }
52
53 void
add_env(const char * var,const char * value)54 add_env(const char *var, const char *value)
55 {
56 int i;
57 char *str;
58 asprintf(&str, "%s=%s", var, value);
59 if(str == NULL)
60 errx(1, "Out of memory!");
61 for(i = 0; i < num_env; i++)
62 if(strncmp(env[i], var, strlen(var)) == 0 &&
63 env[i][strlen(var)] == '='){
64 free(env[i]);
65 env[i] = str;
66 return;
67 }
68
69 extend_env(str);
70 }
71
72 #if !HAVE_DECL_ENVIRON
73 extern char **environ;
74 #endif
75
76
77 void
copy_env(void)78 copy_env(void)
79 {
80 char **p;
81 for(p = environ; *p; p++)
82 extend_env(*p);
83 }
84
85 void
login_read_env(const char * file)86 login_read_env(const char *file)
87 {
88 char **newenv;
89 char *p;
90 int i, j;
91
92 newenv = NULL;
93 i = read_environment(file, &newenv);
94 for (j = 0; j < i; j++) {
95 p = strchr(newenv[j], '=');
96 if (p == NULL)
97 errx(1, "%s: missing = in string %s",
98 file, newenv[j]);
99 *p++ = 0;
100 add_env(newenv[j], p);
101 *--p = '=';
102 free(newenv[j]);
103 }
104 free(newenv);
105 }
106