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authorMarc Espie <espie@cvs.openbsd.org>2001-04-17 21:44:39 +0000
committerMarc Espie <espie@cvs.openbsd.org>2001-04-17 21:44:39 +0000
commitf626d4fa3003ffc2b7e2c084881a4a692d78c208 (patch)
tree904ee2fa1b590fffd36e2842b0a66f6511613751 /gnu/usr.bin/ld/ldd/scanlib.c
parentfb737690984505c86ccb7eca08ad27653bbbea34 (diff)
Let ldd scan shared libraries. Since it doesn't load them, it doesn't
use the hint cache nor anything, but at least it shows what dependencies exist.
Diffstat (limited to 'gnu/usr.bin/ld/ldd/scanlib.c')
-rw-r--r--gnu/usr.bin/ld/ldd/scanlib.c109
1 files changed, 109 insertions, 0 deletions
diff --git a/gnu/usr.bin/ld/ldd/scanlib.c b/gnu/usr.bin/ld/ldd/scanlib.c
new file mode 100644
index 00000000000..e169f6e5aac
--- /dev/null
+++ b/gnu/usr.bin/ld/ldd/scanlib.c
@@ -0,0 +1,109 @@
+/* $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);
+ }
+ }
+}