2 * Copyright (c) 1998 John D. Polstra
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * $FreeBSD: src/lib/libc/gen/getobjformat.c,v 1.3 1999/12/18 04:47:43 obrien Exp $
29 #include <sys/param.h>
30 #include <objformat.h>
35 #define PATH_OBJFORMAT "/etc/objformat"
37 static int copyformat(char *, const char *, size_t);
39 static const char *known_formats[] = { OBJFORMAT_NAMES, NULL };
42 copyformat(char *buf, const char *fmt, size_t bufsize)
47 if (len > bufsize - 1)
54 getobjformat(char *buf, size_t bufsize, int *argcp, char **argv)
65 * Scan for arguments setting known formats, e.g., "-elf".
66 * If "argcp" is non-NULL, delete these arguments from the
67 * list and update the argument count in "*argcp".
69 for (dst = src = argv; *src != NULL; src++) {
70 if ((*src)[0] == '-') {
73 for (p = known_formats; *p != NULL; p++)
74 if (strcmp(*src + 1, *p) == 0)
78 if (argcp == NULL) /* Don't delete */
89 return copyformat(buf, fmt, bufsize);
92 /* Check the OBJFORMAT environment variable. */
93 if ((env = getenv("OBJFORMAT")) != NULL)
94 return copyformat(buf, env, bufsize);
96 /* Take a look at "/etc/objformat". */
97 if ((fp = fopen(PATH_OBJFORMAT, "r")) != NULL) {
103 while (fgets(line, sizeof line, fp) != NULL) {
104 if (strncmp(line, "OBJFORMAT=", 10) == 0) {
107 p[strcspn(p, " \t\n")] = '\0';
108 len = copyformat(buf, p, bufsize);
117 /* As a last resort, use the compiled in default. */
118 return copyformat(buf, OBJFORMAT_DEFAULT, bufsize);