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brandelf: capsicumize it

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This commit is contained in:
oshogbo 2018-11-18 12:23:03 +00:00
parent dfb90bcff9
commit cd0f707c73
2 changed files with 31 additions and 2 deletions
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8
usr.bin/brandelf/Makefile
View File

@ -1,5 +1,13 @@
# $FreeBSD$
.include <src.opts.mk>
PROG= brandelf
.if ${MK_CASPER} != "no"
LIBADD+= casper
LIBADD+= cap_fileargs
CFLAGS+= -DWITH_CASPER
.endif
.include <bsd.prog.mk>

25
usr.bin/brandelf/brandelf.c
View File

@ -33,9 +33,11 @@
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/capsicum.h>
#include <sys/elf_common.h>
#include <sys/errno.h>
#include <capsicum_helpers.h>
#include <err.h>
#include <fcntl.h>
#include <stdbool.h>
@ -44,6 +46,9 @@ __FBSDID("$FreeBSD$");
#include <string.h>
#include <unistd.h>
#include <libcasper.h>
#include <casper/cap_fileargs.h>
static int elftype(const char *);
static const char *iselftype(int);
static void printelftypes(void);
@ -66,8 +71,10 @@ main(int argc, char **argv)
{
const char *strtype = "FreeBSD";
int ch, retval, type;
int ch, flags, retval, type;
bool change, force, listed;
fileargs_t *fa;
cap_rights_t rights;
type = ELFOSABI_FREEBSD;
retval = 0;
@ -121,11 +128,24 @@ main(int argc, char **argv)
usage();
}
flags = change || force ? O_RDWR : O_RDONLY;
cap_rights_init(&rights, CAP_READ, CAP_SEEK);
if (flags == O_RDWR)
cap_rights_set(&rights, CAP_WRITE);
fa = fileargs_init(argc, argv, flags, 0, &rights);
if (fa == NULL)
errx(1, "unable to init casper");
caph_cache_catpages();
if (caph_limit_stdio() < 0 || caph_enter_casper() < 0)
err(1, "unable to enter capability mode");
while (argc != 0) {
int fd;
char buffer[EI_NIDENT];
if ((fd = open(argv[0], change || force ? O_RDWR : O_RDONLY, 0)) < 0) {
if ((fd = fileargs_open(fa, argv[0])) < 0) {
warn("error opening file %s", argv[0]);
retval = 1;
goto fail;
@ -167,6 +187,7 @@ main(int argc, char **argv)
argv++;
}
fileargs_free(fa);
return (retval);
}