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/* $OpenBSD: scanlib.c,v 1.1 2001/04/17 21:44:38 espie Exp $ */
/*
* Copyright (c) 2001 Marc Espie.
*
* 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Marc Espie for the OpenBSD
* Project.
*
* THIS SOFTWARE IS PROVIDED BY THE OPENBSD PROJECT 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 OPENBSD
* PROJECT 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.
*/
#include <sys/types.h>
#include <sys/param.h>
#include <fcntl.h>
#include <unistd.h>
#include <a.out.h>
#include <link.h>
void
scan_library(fd, hdr, name)
int fd;
struct exec *hdr;
const char *name;
{
struct _dynamic dyn;
struct section_dispatch_table sdt;
printf("%s:\n", name);
/* Assumes DYNAMIC structure starts data segment */
if (lseek(fd, N_DATOFF(*hdr), SEEK_SET) == -1) {
warn("%s: lseek", name);
return;
}
if (read(fd, &dyn, sizeof dyn) != sizeof dyn) {
warn("%s: premature EOF reading _dynamic", name);
return;
}
/* Check version */
switch (dyn.d_version) {
default:
warnx("%s: unsupported _DYNAMIC version: %d",
name, dyn.d_version);
return;
case LD_VERSION_SUN:
case LD_VERSION_BSD:
break;
}
if (lseek(fd, (unsigned long)dyn.d_un.d_sdt + N_TXTOFF(*hdr),
SEEK_SET) == -1) {
warn("%s: lseek", name);
return;
}
if (read(fd, &sdt, sizeof sdt) != sizeof sdt) {
warn("%s: premature EOF reading sdt", name);
return;
}
if (sdt.sdt_sods) {
struct sod sod;
off_t offset;
char entry[MAXPATHLEN];
for (offset = sdt.sdt_sods; offset != 0;
offset = sod.sod_next) {
if (lseek(fd, offset, SEEK_SET) == -1) {
warn("%s: bad seek to sod", name);
return;
}
if (read(fd, &sod, sizeof(sod)) != sizeof(sod)) {
warnx("%s: premature EOF reading sod", name);
return;
}
if (lseek(fd, (off_t)sod.sod_name, SEEK_SET) == -1) {
warn("%s: lseek", name);
return;
}
(void)read(fd, entry, sizeof entry);
/* make sure this is terminated */
entry[MAXPATHLEN-1] = '\0';
if (sod.sod_library)
printf("\t-l%s.%d.%d\n", entry,
sod.sod_major, sod.sod_minor);
else
printf("\t%s\n", name);
}
}
}
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