120 lines
3.2 KiB
C
120 lines
3.2 KiB
C
|
/*-
|
||
|
|
* 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);
|
||
|
|
}
|