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/*-
* Copyright (c) 1998 John D. Polstra
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
*
* $Id$
*/
#include <sys/param.h>
#include <objformat.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#define PATH_OBJFORMAT "/etc/objformat"
static int copyformat(char *, const char *, size_t);
static const char *known_formats[] = { OBJFORMAT_NAMES, NULL };
static int
copyformat(char *buf, const char *fmt, size_t bufsize)
{
size_t len;
len = strlen(fmt);
if (len > bufsize - 1)
return -1;
strcpy(buf, fmt);
return len;
}
int
getobjformat(char *buf, size_t bufsize, int *argcp, char **argv)
{
const char *fmt;
char **src, **dst;
const char *env;
FILE *fp;
fmt = NULL;
if (argv != NULL) {
/*
* Scan for arguments setting known formats, e.g., "-elf".
* If "argcp" is non-NULL, delete these arguments from the
* list and update the argument count in "*argcp".
*/
for (dst = src = argv; *src != NULL; src++) {
if ((*src)[0] == '-') {
const char **p;
for (p = known_formats; *p != NULL; p++)
if (strcmp(*src + 1, *p) == 0)
break;
if (*p != NULL) {
fmt = *p;
if (argcp == NULL) /* Don't delete */
*dst++ = *src;
} else
*dst++ = *src;
} else
*dst++ = *src;
}
*dst = NULL;
if (argcp != NULL)
*argcp -= src - dst;
if (fmt != NULL)
return copyformat(buf, fmt, bufsize);
}
/* Check the OBJFORMAT environment variable. */
if ((env = getenv("OBJFORMAT")) != NULL)
return copyformat(buf, env, bufsize);
/* Take a look at "/etc/objformat". */
if ((fp = fopen(PATH_OBJFORMAT, "r")) != NULL) {
char line[1024];
int found;
int len;
found = 0;
while (fgets(line, sizeof line, fp) != NULL) {
if (strncmp(line, "OBJFORMAT=", 10) == 0) {
char *p = &line[10];
p[strcspn(p, " \t\n")] = '\0';
len = copyformat(buf, p, bufsize);
found = 1;
}
}
fclose(fp);
if (found)
return len;
}
/* As a last resort, use the compiled in default. */
return copyformat(buf, OBJFORMAT_DEFAULT, bufsize);
}
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