getepenv.c revision 7c478bd95313f5f23a4c958a745db2134aa03244
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (the "License"). You may not use this file except in compliance
* with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
/* All Rights Reserved */
/*
* Copyright (c) 1985 AT&T
* All Rights Reserved
*/
#ident "%Z%%M% %I% %E% SMI" /* SVr4.0 1.4 */
#include <stdio.h>
#include "wish.h"
#include "moremacros.h"
#include "sizes.h"
/*
* getepenv looks for name=value in environment and in $HOME/pref/.environ
* If not present, return NULL.
*/
char *
getepenv(name)
char *name;
{
char path[PATHSIZ];
register char *ptr;
extern char *Home;
char *anyenv();
char *getenv();
if ((ptr = getAltenv(name)) || (ptr = getenv(name)))
return strsave(ptr);
strcpy(path, Home);
strcat(path, "/pref/.environ");
return anyenv(path, name);
}
/*
* anyenv lloks in path for name=value and returns value
* value is backslash processed and expanded before it is returned
*/
char *
anyenv(path, name)
char *path;
char *name;
{
char buf[BUFSIZ];
char fpbuf[BUFSIZ];
register char *ptr;
register int c;
register FILE *fp;
char *fgets();
char *expand();
char *unbackslash();
if ((fp = fopen(path, "r")) == NULL)
return NULL;
setbuf(fp, fpbuf);
/* for (each line of .environ file) */
for (c = !EOF; c != EOF; ) {
ptr = name;
while (*ptr && (c = getc(fp)) == *ptr)
ptr++;
/* if ("name=" found) get rest of line */
if (*ptr == '\0' && (c = getc(fp)) == '=' && fgets(buf, sizeof(buf), fp)) {
if (buf[c = strlen(buf) - 1] == '\n')
buf[c] = '\0';
fclose(fp);
return expand(unbackslash(buf));
}
/* skip rest of line */
while (c != EOF && c != '\n')
c = getc(fp);
}
fclose(fp);
return NULL;
}