mirror of
https://github.com/sheumann/hush.git
synced 2024-08-20 19:29:02 +00:00
text data bss dec hexfilename 838650 8009 0 846659 ceb43busybox_old 838519 8009 0 846528 ceac0busybox_unstripped Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
180 lines
5.1 KiB
C
180 lines
5.1 KiB
C
/*
|
|
* chcon -- change security context, based on coreutils-5.97-13
|
|
*
|
|
* Port to busybox: KaiGai Kohei <kaigai@kaigai.gr.jp>
|
|
*
|
|
* Copyright (C) 2006 - 2007 KaiGai Kohei <kaigai@kaigai.gr.jp>
|
|
*
|
|
* Licensed under GPLv2, see file LICENSE in this tarball for details.
|
|
*/
|
|
#include <getopt.h>
|
|
#include <selinux/context.h>
|
|
|
|
#include "libbb.h"
|
|
|
|
#define OPT_RECURSIVE (1<<0) /* 'R' */
|
|
#define OPT_CHANHES (1<<1) /* 'c' */
|
|
#define OPT_NODEREFERENCE (1<<2) /* 'h' */
|
|
#define OPT_QUIET (1<<3) /* 'f' */
|
|
#define OPT_USER (1<<4) /* 'u' */
|
|
#define OPT_ROLE (1<<5) /* 'r' */
|
|
#define OPT_TYPE (1<<6) /* 't' */
|
|
#define OPT_RANGE (1<<7) /* 'l' */
|
|
#define OPT_VERBOSE (1<<8) /* 'v' */
|
|
#define OPT_REFERENCE ((1<<9) * ENABLE_FEATURE_CHCON_LONG_OPTIONS)
|
|
#define OPT_COMPONENT_SPECIFIED (OPT_USER | OPT_ROLE | OPT_TYPE | OPT_RANGE)
|
|
|
|
static char *user = NULL;
|
|
static char *role = NULL;
|
|
static char *type = NULL;
|
|
static char *range = NULL;
|
|
static char *specified_context = NULL;
|
|
|
|
static int FAST_FUNC change_filedir_context(
|
|
const char *fname,
|
|
struct stat *stbuf UNUSED_PARAM,
|
|
void *userData UNUSED_PARAM,
|
|
int depth UNUSED_PARAM)
|
|
{
|
|
context_t context = NULL;
|
|
security_context_t file_context = NULL;
|
|
security_context_t context_string;
|
|
int rc = FALSE;
|
|
int status = 0;
|
|
|
|
if (option_mask32 & OPT_NODEREFERENCE) {
|
|
status = lgetfilecon(fname, &file_context);
|
|
} else {
|
|
status = getfilecon(fname, &file_context);
|
|
}
|
|
if (status < 0 && errno != ENODATA) {
|
|
if ((option_mask32 & OPT_QUIET) == 0)
|
|
bb_error_msg("can't obtain security context: %s", fname);
|
|
goto skip;
|
|
}
|
|
|
|
if (file_context == NULL && specified_context == NULL) {
|
|
bb_error_msg("can't apply partial context to unlabeled file %s", fname);
|
|
goto skip;
|
|
}
|
|
|
|
if (specified_context == NULL) {
|
|
context = set_security_context_component(file_context,
|
|
user, role, type, range);
|
|
if (!context) {
|
|
bb_error_msg("can't compute security context from %s", file_context);
|
|
goto skip;
|
|
}
|
|
} else {
|
|
context = context_new(specified_context);
|
|
if (!context) {
|
|
bb_error_msg("invalid context: %s", specified_context);
|
|
goto skip;
|
|
}
|
|
}
|
|
|
|
context_string = context_str(context);
|
|
if (!context_string) {
|
|
bb_error_msg("can't obtain security context in text expression");
|
|
goto skip;
|
|
}
|
|
|
|
if (file_context == NULL || strcmp(context_string, file_context) != 0) {
|
|
int fail;
|
|
|
|
if (option_mask32 & OPT_NODEREFERENCE) {
|
|
fail = lsetfilecon(fname, context_string);
|
|
} else {
|
|
fail = setfilecon(fname, context_string);
|
|
}
|
|
if ((option_mask32 & OPT_VERBOSE) || ((option_mask32 & OPT_CHANHES) && !fail)) {
|
|
printf(!fail
|
|
? "context of %s changed to %s\n"
|
|
: "can't change context of %s to %s\n",
|
|
fname, context_string);
|
|
}
|
|
if (!fail) {
|
|
rc = TRUE;
|
|
} else if ((option_mask32 & OPT_QUIET) == 0) {
|
|
bb_error_msg("can't change context of %s to %s",
|
|
fname, context_string);
|
|
}
|
|
} else if (option_mask32 & OPT_VERBOSE) {
|
|
printf("context of %s retained as %s\n", fname, context_string);
|
|
rc = TRUE;
|
|
}
|
|
skip:
|
|
context_free(context);
|
|
freecon(file_context);
|
|
|
|
return rc;
|
|
}
|
|
|
|
#if ENABLE_FEATURE_CHCON_LONG_OPTIONS
|
|
static const char chcon_longopts[] ALIGN1 =
|
|
"recursive\0" No_argument "R"
|
|
"changes\0" No_argument "c"
|
|
"no-dereference\0" No_argument "h"
|
|
"silent\0" No_argument "f"
|
|
"quiet\0" No_argument "f"
|
|
"user\0" Required_argument "u"
|
|
"role\0" Required_argument "r"
|
|
"type\0" Required_argument "t"
|
|
"range\0" Required_argument "l"
|
|
"verbose\0" No_argument "v"
|
|
"reference\0" Required_argument "\xff" /* no short option */
|
|
;
|
|
#endif
|
|
|
|
int chcon_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
|
|
int chcon_main(int argc UNUSED_PARAM, char **argv)
|
|
{
|
|
char *reference_file;
|
|
char *fname;
|
|
int i, errors = 0;
|
|
|
|
#if ENABLE_FEATURE_CHCON_LONG_OPTIONS
|
|
applet_long_options = chcon_longopts;
|
|
#endif
|
|
opt_complementary = "-1" /* at least 1 param */
|
|
":?" /* error if exclusivity constraints are violated */
|
|
#if ENABLE_FEATURE_CHCON_LONG_OPTIONS
|
|
":\xff--urtl:u--\xff:r--\xff:t--\xff:l--\xff"
|
|
#endif
|
|
":f--v:v--f"; /* 'verbose' and 'quiet' are exclusive */
|
|
getopt32(argv, "Rchfu:r:t:l:v",
|
|
&user, &role, &type, &range, &reference_file);
|
|
argv += optind;
|
|
|
|
#if ENABLE_FEATURE_CHCON_LONG_OPTIONS
|
|
if (option_mask32 & OPT_REFERENCE) {
|
|
/* FIXME: lgetfilecon() should be used when '-h' is specified.
|
|
But current implementation follows the original one. */
|
|
if (getfilecon(reference_file, &specified_context) < 0)
|
|
bb_perror_msg_and_die("getfilecon('%s') failed", reference_file);
|
|
} else
|
|
#endif
|
|
if ((option_mask32 & OPT_COMPONENT_SPECIFIED) == 0) {
|
|
specified_context = *argv++;
|
|
/* specified_context is never NULL -
|
|
* "-1" in opt_complementary prevents this. */
|
|
if (!argv[0])
|
|
bb_error_msg_and_die("too few arguments");
|
|
}
|
|
|
|
for (i = 0; (fname = argv[i]) != NULL; i++) {
|
|
int fname_len = strlen(fname);
|
|
while (fname_len > 1 && fname[fname_len - 1] == '/')
|
|
fname_len--;
|
|
fname[fname_len] = '\0';
|
|
|
|
if (recursive_action(fname,
|
|
1<<option_mask32 & OPT_RECURSIVE,
|
|
change_filedir_context,
|
|
change_filedir_context,
|
|
NULL, 0) != TRUE)
|
|
errors = 1;
|
|
}
|
|
return errors;
|
|
}
|