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Diffstat (limited to 'bootstrap/bmake/getenv.c')
| -rw-r--r-- | bootstrap/bmake/getenv.c | 90 |
1 files changed, 90 insertions, 0 deletions
diff --git a/bootstrap/bmake/getenv.c b/bootstrap/bmake/getenv.c new file mode 100644 index 00000000000..9a17c46ea53 --- /dev/null +++ b/bootstrap/bmake/getenv.c @@ -0,0 +1,90 @@ +/* + * 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_GETENV + +#if defined(LIBC_SCCS) && !defined(lint) +/*static char *sccsid = "from: @(#)getenv.c 5.8 (Berkeley) 2/23/91";*/ +static char *rcsid = "$Id: getenv.c,v 1.1.1.1 2004/03/11 13:04:07 grant Exp $"; +#endif /* LIBC_SCCS and not lint */ + +#include <stdlib.h> +#include <stddef.h> +#include <string.h> +#include <sys/cdefs.h> + +/* + * getenv -- + * Returns ptr to value associated with name, if any, else NULL. + */ +char * +getenv(name) + const char *name; +{ + int offset; + char *__findenv(); + + return(__findenv(name, &offset)); +} + +/* + * __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. + */ +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); +} +#endif |