2 static char *rcsid = "$Id: setenv.c,v 1.1.1.1 2003/06/04 00:27:01 marka Exp $";
6 * Copyright (c) 2002 Japan Network Information Center.
9 * By using this file, you agree to the terms and conditions set forth bellow.
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19 * modified or derived work) in source and/or binary forms is permitted
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23 * appear in each source code file, this License Terms and Conditions.
25 * 3. Redistribution in binary form must reproduce the Copyright Notice,
26 * this License Terms and Conditions, in the documentation and/or other
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52 * We don't include <stdlib.h> here.
53 * Also <stdlib.h> may declare `environ' and its type might be different
56 extern char **environ;
58 typedef struct myenv myenv_t;
66 static myenv_t *myenvs = NULL;
69 myunsetenv(const char *name) {
73 extern void free(void *);
75 namelen = strlen(name);
76 for (e = environ; *e != NULL; e++) {
77 if (strncmp(*e, name, namelen) == 0 && (*e)[namelen] == '=')
83 for (mye = myenvs; mye != NULL; mye = mye->next) {
84 if (mye->pointer == *e) {
85 if (mye->next != NULL)
86 mye->next->prev = mye->prev;
87 if (mye->prev != NULL)
88 mye->prev->next = mye->next;
89 if (mye->next == NULL && mye->prev == NULL)
97 for ( ; *e != NULL; e++)
104 mysetenv(const char *name, const char *value, int overwrite) {
109 if (getenv(name) != NULL && !overwrite)
112 buffer = (char *) malloc(strlen(name) + strlen(value) + 2);
115 strcpy(buffer, name);
117 strcat(buffer, value);
121 mye = (myenv_t *) malloc(sizeof(myenv_t));
124 mye->pointer = buffer;
131 result = putenv(buffer);