commit: 8a389efbb1b504de7964ab093af1d528da7ebf3b
Author: Fabian Groffen <grobian <AT> gentoo <DOT> org>
AuthorDate: Fri Jan 1 14:06:22 2021 +0000
Commit: Fabian Groffen <grobian <AT> gentoo <DOT> org>
CommitDate: Fri Jan 1 14:06:22 2021 +0000
URL: https://gitweb.gentoo.org/proj/pax-utils.git/commit/?id=8a389efb
scanmacho: add support for dumping UUIDs
Add flag -U/--uuid to dump the object's UUID.
(This is in particular useful when comparing against TextAPI stubs,
.tbd files.)
Signed-off-by: Fabian Groffen <grobian <AT> gentoo.org>
macho.h | 6 ++++++
scanmacho.c | 56 ++++++++++++++++++++++++++++++++++++++++++++++++++------
2 files changed, 56 insertions(+), 6 deletions(-)
diff --git a/macho.h b/macho.h
index 7457473..79da151 100644
--- a/macho.h
+++ b/macho.h
@@ -258,6 +258,12 @@ struct rpath_command {
union lc_str path;
};
+struct uuid_command {
+ uint32_t cmd;
+ uint32_t cmdsize;
+ uint8_t uuid[16];
+};
+
struct fat_header
{
uint32_t magic;
diff --git a/scanmacho.c b/scanmacho.c
index 71b1593..e2aa485 100644
--- a/scanmacho.c
+++ b/scanmacho.c
@@ -1,12 +1,12 @@
/*
- * Copyright 2008-2012 Gentoo Foundation
+ * Copyright 2008-2021 Gentoo Foundation
* Distributed under the terms of the GNU General Public License v2
*
* based on scanelf by:
* Copyright 2003-2012 Ned Ludd - <[email protected]>
* Copyright 2004-2012 Mike Frysinger - <[email protected]>
* for Darwin specific fun:
- * 2008-2013 Fabian Groffen - <[email protected]>
+ * 2008-2021 Fabian Groffen - <[email protected]>
*/
const char argv0[] = "scanmacho";
@@ -37,6 +37,7 @@ static char show_rpath = 0;
static char show_needed = 0;
static char show_interp = 0;
static char show_bind = 0;
+static char show_uuid = 0;
static char show_soname = 0;
static char show_banner = 1;
static char show_endian = 0;
@@ -181,18 +182,54 @@ static char *macho_file_soname(fatobj *fobj, char
*found_soname)
return NULL;
}
+static char *macho_file_uuid(fatobj *fobj, char *found_uuid)
+{
+ loadcmd *lcmd;
+ uint32_t lc_uuid;
+ static char uuid_buf[32 + 4 + 1];
+
+ if (!show_uuid)
+ return NULL;
+
+ lcmd = firstloadcmd(fobj);
+ lc_uuid = MGET(fobj->swapped, LC_UUID);
+
+ do {
+ if (lcmd->lcmd->cmd == lc_uuid) {
+ struct uuid_command *ucmd = lcmd->data;
+ unsigned char *uuid;
+ uuid = (unsigned char *)(ucmd->uuid);
+ *found_uuid = 1;
+ free(lcmd);
+ if (be_wewy_wewy_quiet)
+ return NULL;
+ snprintf(uuid_buf, sizeof(uuid_buf),
+
"%02x%02x%02x%02x-%02x%02x-%02x%02x-%02x%02x-"
+ "%02x%02x%02x%02x%02x%02x",
+ uuid[0], uuid[1], uuid[2], uuid[3],
+ uuid[4], uuid[5],
+ uuid[6], uuid[7],
+ uuid[8], uuid[9],
+ uuid[10], uuid[11], uuid[12], uuid[13],
uuid[14], uuid[15]);
+ return uuid_buf;
+ }
+ } while (nextloadcmd(lcmd));
+
+ return NULL;
+}
+
/* scan a macho file and show all the fun stuff */
#define prints(str) ({ ssize_t ret = write(fileno(stdout), str, strlen(str));
ret; })
static int scanmacho_fatobj(fatobj *fobj)
{
unsigned long i;
char found_rpath, found_needed, found_interp, found_soname,
- found_lib, found_file;
+ found_lib, found_file, found_uuid;
static char *out_buffer = NULL;
static size_t out_len;
found_rpath = found_needed = found_interp = found_soname = \
- found_lib = found_file = 0;
+ found_lib = found_file = found_uuid = 0;
if (be_verbose > 2)
printf("%s: scanning file {%s,%s}\n", fobj->filename,
@@ -228,6 +265,7 @@ static int scanmacho_fatobj(fatobj *fobj)
case 'b': prints("FLAGS "); break;
case 'Z': prints("SIZE "); break;
case 'S': prints("INSTALLNAME "); break;
+ case 'U': prints("UUID "); break;
case 'N': prints("LIB "); break;
case 'a': prints("ARCH "); break;
case 'O': prints("PERM "); break;
@@ -293,6 +331,7 @@ static int scanmacho_fatobj(fatobj *fobj)
case 'i': out = macho_file_interp(fobj, &found_interp); break;
case 'b': get_machomhflags(fobj, &out_buffer, &out_len); break;
case 'S': out = macho_file_soname(fobj, &found_soname); break;
+ case 'U': out = macho_file_uuid(fobj, &found_uuid); break;
case 'a': out = get_machomtype(fobj); break;
case 'Z': snprintf(ubuf, sizeof(ubuf), "%llu", (unsigned long
long int)fobj->len); out = ubuf; break;;
default: warnf("'%c' has no scan code?", out_format[i]);
@@ -532,8 +571,8 @@ static void scanmacho_envpath(void)
free(path);
}
-/* usage / invocation handling functions */ /* Free Flags: c d e j k l s t u w
x z G H I J K L P Q T U W X Y */
-#define PARSE_FLAGS "pRmyArnibSN:gE:M:DO:ZaqvF:f:o:CBhV"
+/* usage / invocation handling functions */ /* Free Flags: c d e j k l s t u w
x z G H I J K L P Q T W X Y */
+#define PARSE_FLAGS "pRmyArnibSUN:gE:M:DO:ZaqvF:f:o:CBhV"
#define a_argument required_argument
static struct option const long_opts[] = {
{"path", no_argument, NULL, 'p'},
@@ -546,6 +585,7 @@ static struct option const long_opts[] = {
{"interp", no_argument, NULL, 'i'},
{"bind", no_argument, NULL, 'b'},
{"soname", no_argument, NULL, 'S'},
+ {"uuid", no_argument, NULL, 'U'},
{"lib", a_argument, NULL, 'N'},
{"gmatch", no_argument, NULL, 'g'},
{"etype", a_argument, NULL, 'E'},
@@ -577,6 +617,7 @@ static const char * const opts_help[] = {
"Print LC_LOAD_DYLINKER information (ELF: INTERP)",
"Print flags from mach_header (ELF: BIND)",
"Print LC_ID_DYLIB information (ELF: SONAME)",
+ "Print LC_UUID information",
"Find a specified library",
"Use strncmp to match libraries. (use with -N)",
"Print only Mach-O files matching mach_header\n"
@@ -678,6 +719,7 @@ static int parseargs(int argc, char *argv[])
case 'i': show_interp = 1; break;
case 'b': show_bind = 1; break;
case 'S': show_soname = 1; break;
+ case 'U': show_uuid = 1; break;
case 'q': be_quiet = 1; break;
case 'v': be_verbose = (be_verbose % 20) + 1; break;
case 'a': show_perms = show_endian = show_bind = 1; break;
@@ -717,6 +759,7 @@ static int parseargs(int argc, char *argv[])
case 'i': show_interp = 1; break;
case 'b': show_bind = 1; break;
case 'S': show_soname = 1; break;
+ case 'U': show_uuid = 1; break;
default:
err("Invalid format specifier '%c' (byte %i)",
out_format[i], i+1);
@@ -738,6 +781,7 @@ static int parseargs(int argc, char *argv[])
if (show_interp) xstrcat(&out_format, "%i ", &fmt_len);
if (show_bind) xstrcat(&out_format, "%b ", &fmt_len);
if (show_soname) xstrcat(&out_format, "%S ", &fmt_len);
+ if (show_uuid) xstrcat(&out_format, "%U ", &fmt_len);
if (find_lib) xstrcat(&out_format, "%N ", &fmt_len);
if (!be_quiet) xstrcat(&out_format, "%F ", &fmt_len);
}
