cfa4d73988
standard places ("/etc/objformat", ${OBJFORMAT}, argv) for an
indication of the user's preferred object file format. This
consolidates some code that was starting to be duplicated in more
and more places.
Use the new function in ldconfig.
Note: I don't think that gcc should use getobjformat(), even though
it could. The compiler should limit itself to functions that are
widespread, to ease porting and cross-compilation.
120 lines
3.2 KiB
C
120 lines
3.2 KiB
C
/*-
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* Copyright (c) 1998 John D. Polstra
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $Id$
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*/
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#include <sys/param.h>
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#include <objformat.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#define PATH_OBJFORMAT "/etc/objformat"
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static int copyformat(char *, const char *, size_t);
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static const char *known_formats[] = { OBJFORMAT_NAMES, NULL };
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static int
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copyformat(char *buf, const char *fmt, size_t bufsize)
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{
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size_t len;
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len = strlen(fmt);
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if (len > bufsize - 1)
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return -1;
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strcpy(buf, fmt);
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return len;
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}
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int
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getobjformat(char *buf, size_t bufsize, int *argcp, char **argv)
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{
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const char *fmt;
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char **src, **dst;
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const char *env;
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FILE *fp;
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fmt = NULL;
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if (argv != NULL) {
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/*
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* Scan for arguments setting known formats, e.g., "-elf".
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* If "argcp" is non-NULL, delete these arguments from the
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* list and update the argument count in "*argcp".
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*/
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for (dst = src = argv; *src != NULL; src++) {
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if ((*src)[0] == '-') {
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const char **p;
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for (p = known_formats; *p != NULL; p++)
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if (strcmp(*src + 1, *p) == 0)
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break;
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if (*p != NULL) {
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fmt = *p;
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if (argcp == NULL) /* Don't delete */
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*dst++ = *src;
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} else
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*dst++ = *src;
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} else
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*dst++ = *src;
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}
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*dst = NULL;
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if (argcp != NULL)
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*argcp -= src - dst;
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if (fmt != NULL)
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return copyformat(buf, fmt, bufsize);
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}
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/* Check the OBJFORMAT environment variable. */
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if ((env = getenv("OBJFORMAT")) != NULL)
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return copyformat(buf, env, bufsize);
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/* Take a look at "/etc/objformat". */
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if ((fp = fopen(PATH_OBJFORMAT, "r")) != NULL) {
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char line[1024];
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int found;
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int len;
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found = 0;
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while (fgets(line, sizeof line, fp) != NULL) {
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if (strncmp(line, "OBJFORMAT=", 10) == 0) {
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char *p = &line[10];
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p[strcspn(p, " \t\n")] = '\0';
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len = copyformat(buf, p, bufsize);
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found = 1;
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}
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}
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fclose(fp);
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if (found)
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return len;
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}
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/* As a last resort, use the compiled in default. */
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return copyformat(buf, OBJFORMAT_DEFAULT, bufsize);
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}
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