diff options
Diffstat (limited to '20120831/setenv.c')
| -rw-r--r-- | 20120831/setenv.c | 154 |
1 files changed, 0 insertions, 154 deletions
diff --git a/20120831/setenv.c b/20120831/setenv.c deleted file mode 100644 index efd0f74..0000000 --- a/20120831/setenv.c +++ /dev/null @@ -1,154 +0,0 @@ -/* - * 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. All advertising materials mentioning features or use of this software - * must display the following acknowledgement: - * This product includes software developed by the University of - * California, Berkeley and its contributors. - * 4. 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. - */ - -#ifdef HAVE_CONFIG_H -# include "config.h" -#endif -#ifndef HAVE_SETENV - -#if defined(LIBC_SCCS) && !defined(lint) -/*static char *sccsid = "from: @(#)setenv.c 5.6 (Berkeley) 6/4/91";*/ -static char *rcsid = "$Id: setenv.c,v 1.5 1996/09/04 22:10:42 sjg Exp $"; -#endif /* LIBC_SCCS and not lint */ - -#include <stddef.h> -#include <stdlib.h> -#include <string.h> - -/* - * __findenv -- - * Returns pointer to value associated with name, if any, else NULL. - * Sets offset to be the offset of the name/value combination in the - * environmental array, for use by setenv(3) and unsetenv(3). - * Explicitly removes '=' in argument name. - * - * This routine *should* be a static; don't use it. - */ -static char * -__findenv(name, offset) - register char *name; - int *offset; -{ - extern char **environ; - register int len; - register char **P, *C; - - for (C = name, len = 0; *C && *C != '='; ++C, ++len); - for (P = environ; *P; ++P) - if (!strncmp(*P, name, len)) - if (*(C = *P + len) == '=') { - *offset = P - environ; - return(++C); - } - return(NULL); -} - -/* - * setenv -- - * Set the value of the environmental variable "name" to be - * "value". If rewrite is set, replace any current value. - */ -setenv(name, value, rewrite) - register const char *name; - register const char *value; - int rewrite; -{ - extern char **environ; - static int alloced; /* if allocated space before */ - register char *C; - int l_value, offset; - char *__findenv(); - - if (*value == '=') /* no `=' in value */ - ++value; - l_value = strlen(value); - if ((C = __findenv(name, &offset))) { /* find if already exists */ - if (!rewrite) - return (0); - if (strlen(C) >= l_value) { /* old larger; copy over */ - while (*C++ = *value++); - return (0); - } - } else { /* create new slot */ - register int cnt; - register char **P; - - for (P = environ, cnt = 0; *P; ++P, ++cnt); - if (alloced) { /* just increase size */ - environ = (char **)realloc((char *)environ, - (size_t)(sizeof(char *) * (cnt + 2))); - if (!environ) - return (-1); - } - else { /* get new space */ - alloced = 1; /* copy old entries into it */ - P = (char **)malloc((size_t)(sizeof(char *) * - (cnt + 2))); - if (!P) - return (-1); - bcopy(environ, P, cnt * sizeof(char *)); - environ = P; - } - environ[cnt + 1] = NULL; - offset = cnt; - } - for (C = (char *)name; *C && *C != '='; ++C); /* no `=' in name */ - if (!(environ[offset] = /* name + `=' + value */ - malloc((size_t)((int)(C - name) + l_value + 2)))) - return (-1); - for (C = environ[offset]; (*C = *name++) && *C != '='; ++C) - ; - for (*C++ = '='; *C++ = *value++; ) - ; - return (0); -} - -/* - * unsetenv(name) -- - * Delete environmental variable "name". - */ -void -unsetenv(name) - const char *name; -{ - extern char **environ; - register char **P; - int offset; - char *__findenv(); - - while (__findenv(name, &offset)) /* if set multiple times */ - for (P = &environ[offset];; ++P) - if (!(*P = *(P + 1))) - break; -} -#endif |
