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find: -context support for SELinux (KaiGai Kohei <kaigai@kaigai.gr.jp>)

Browse Source 
find: make it a bit smaller

function                                             old     new   delta
.rodata                                           129018  129050     +32
parse_params                                        1509    1346    -163
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 1/1 up/down: 32/-163)          Total: -131 bytes
This commit is contained in:
Denis Vlasenko 2007-06-19 22:22:57 +00:00
parent dcf6de552a
commit a19faf8bb7
3 changed files with 226 additions and 198 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
findutils/Config.in
View File

@ -164,6 +164,13 @@ config FEATURE_FIND_REGEX
help
The -regex option matches whole pathname against regular expression.
config FEATURE_FIND_CONTEXT
bool "Enable (-context) option for matching security context"
default n
depends on FIND && SELINUX
help
Support the 'find -context' option for matching security context.
config GREP
bool "grep"
default n

415
findutils/find.c
View File

@ -75,24 +75,25 @@ typedef struct {
} action;
#define ACTS(name, arg...) typedef struct { action a; arg; } action_##name;
#define ACTF(name) static int func_##name(const char *fileName, struct stat *statbuf, action_##name* ap)
ACTS(print)
ACTS(name, const char *pattern;)
USE_FEATURE_FIND_PATH( ACTS(path, const char *pattern;))
USE_FEATURE_FIND_REGEX( ACTS(regex, regex_t compiled_pattern;))
USE_FEATURE_FIND_PRINT0(ACTS(print0))
USE_FEATURE_FIND_TYPE( ACTS(type, int type_mask;))
USE_FEATURE_FIND_PERM( ACTS(perm, char perm_char; mode_t perm_mask;))
USE_FEATURE_FIND_MTIME( ACTS(mtime, char mtime_char; unsigned mtime_days;))
USE_FEATURE_FIND_MMIN( ACTS(mmin, char mmin_char; unsigned mmin_mins;))
USE_FEATURE_FIND_NEWER( ACTS(newer, time_t newer_mtime;))
USE_FEATURE_FIND_INUM( ACTS(inum, ino_t inode_num;))
USE_FEATURE_FIND_EXEC( ACTS(exec, char **exec_argv; unsigned *subst_count; int exec_argc;))
USE_FEATURE_FIND_USER( ACTS(user, uid_t uid;))
USE_FEATURE_FIND_GROUP( ACTS(group, gid_t gid;))
USE_FEATURE_FIND_PAREN( ACTS(paren, action ***subexpr;))
USE_FEATURE_FIND_SIZE( ACTS(size, char size_char; off_t size;))
USE_FEATURE_FIND_PRUNE( ACTS(prune))
USE_FEATURE_FIND_DELETE(ACTS(delete))
ACTS(print)
ACTS(name, const char *pattern;)
USE_FEATURE_FIND_PATH( ACTS(path, const char *pattern;))
USE_FEATURE_FIND_REGEX( ACTS(regex, regex_t compiled_pattern;))
USE_FEATURE_FIND_PRINT0( ACTS(print0))
USE_FEATURE_FIND_TYPE( ACTS(type, int type_mask;))
USE_FEATURE_FIND_PERM( ACTS(perm, char perm_char; mode_t perm_mask;))
USE_FEATURE_FIND_MTIME( ACTS(mtime, char mtime_char; unsigned mtime_days;))
USE_FEATURE_FIND_MMIN( ACTS(mmin, char mmin_char; unsigned mmin_mins;))
USE_FEATURE_FIND_NEWER( ACTS(newer, time_t newer_mtime;))
USE_FEATURE_FIND_INUM( ACTS(inum, ino_t inode_num;))
USE_FEATURE_FIND_USER( ACTS(user, uid_t uid;))
USE_FEATURE_FIND_SIZE( ACTS(size, char size_char; off_t size;))
USE_FEATURE_FIND_CONTEXT(ACTS(context, security_context_t context;))
USE_FEATURE_FIND_PAREN( ACTS(paren, action ***subexpr;))
USE_FEATURE_FIND_PRUNE( ACTS(prune))
USE_FEATURE_FIND_DELETE( ACTS(delete))
USE_FEATURE_FIND_EXEC( ACTS(exec, char **exec_argv; unsigned *subst_count; int exec_argc;))
USE_FEATURE_FIND_GROUP( ACTS(group, gid_t gid;))
static action ***actions;
static bool need_print = 1;
@ -102,7 +103,7 @@ static int recurse_flags = ACTION_RECURSE;
static unsigned count_subst(const char *str)
{
unsigned count = 0;
while ((str = strstr(str, "{}"))) {
while ((str = strstr(str, "{}")) != NULL) {
count++;
str++;
}
@ -355,6 +356,24 @@ ACTF(delete)
return TRUE;
}
#endif
#if ENABLE_FEATURE_FIND_CONTEXT
ACTF(context)
{
security_context_t con;
int rc;
if (recurse_flags & ACTION_FOLLOWLINKS) {
rc = getfilecon(fileName, &con);
} else {
rc = lgetfilecon(fileName, &con);
}
if (rc < 0)
return FALSE;
rc = strcmp(ap->context, con);
freecon(con);
return rc == 0;
}
#endif
static int fileAction(const char *fileName, struct stat *statbuf, void *userData, int depth)
@ -424,64 +443,68 @@ static const char* plus_minus_num(const char* str)
static action*** parse_params(char **argv)
{
enum {
PARM_a ,
PARM_o ,
USE_FEATURE_FIND_NOT( PARM_char_not ,)
PARM_print ,
USE_FEATURE_FIND_PRINT0(PARM_print0 ,)
PARM_name ,
USE_FEATURE_FIND_PATH( PARM_path ,)
USE_FEATURE_FIND_REGEX( PARM_regex ,)
USE_FEATURE_FIND_TYPE( PARM_type ,)
USE_FEATURE_FIND_PERM( PARM_perm ,)
USE_FEATURE_FIND_MTIME( PARM_mtime ,)
USE_FEATURE_FIND_MMIN( PARM_mmin ,)
USE_FEATURE_FIND_NEWER( PARM_newer ,)
USE_FEATURE_FIND_INUM( PARM_inum ,)
USE_FEATURE_FIND_EXEC( PARM_exec ,)
USE_FEATURE_FIND_USER( PARM_user ,)
USE_FEATURE_FIND_GROUP( PARM_group ,)
USE_FEATURE_FIND_DEPTH( PARM_depth ,)
USE_FEATURE_FIND_PAREN( PARM_char_brace,)
USE_FEATURE_FIND_SIZE( PARM_size ,)
USE_FEATURE_FIND_PRUNE( PARM_prune ,)
USE_FEATURE_FIND_DELETE(PARM_delete ,)
PARM_a ,
PARM_o ,
USE_FEATURE_FIND_NOT( PARM_char_not ,)
#if ENABLE_DESKTOP
PARM_and ,
PARM_or ,
USE_FEATURE_FIND_NOT( PARM_not ,)
PARM_and ,
PARM_or ,
USE_FEATURE_FIND_NOT( PARM_not ,)
#endif
PARM_print ,
USE_FEATURE_FIND_PRINT0( PARM_print0 ,)
USE_FEATURE_FIND_DEPTH( PARM_depth ,)
USE_FEATURE_FIND_PRUNE( PARM_prune ,)
USE_FEATURE_FIND_DELETE( PARM_delete ,)
USE_FEATURE_FIND_EXEC( PARM_exec ,)
USE_FEATURE_FIND_PAREN( PARM_char_brace,)
/* All options starting from here require argument */
PARM_name ,
USE_FEATURE_FIND_PATH( PARM_path ,)
USE_FEATURE_FIND_REGEX( PARM_regex ,)
USE_FEATURE_FIND_TYPE( PARM_type ,)
USE_FEATURE_FIND_PERM( PARM_perm ,)
USE_FEATURE_FIND_MTIME( PARM_mtime ,)
USE_FEATURE_FIND_MMIN( PARM_mmin ,)
USE_FEATURE_FIND_NEWER( PARM_newer ,)
USE_FEATURE_FIND_INUM( PARM_inum ,)
USE_FEATURE_FIND_USER( PARM_user ,)
USE_FEATURE_FIND_GROUP( PARM_group ,)
USE_FEATURE_FIND_SIZE( PARM_size ,)
USE_FEATURE_FIND_CONTEXT(PARM_context ,)
};
static const char *const params[] = {
"-a" ,
"-o" ,
USE_FEATURE_FIND_NOT( "!" ,)
"-print" ,
USE_FEATURE_FIND_PRINT0("-print0",)
"-name" ,
USE_FEATURE_FIND_PATH( "-path" ,)
USE_FEATURE_FIND_REGEX( "-regex" ,)
USE_FEATURE_FIND_TYPE( "-type" ,)
USE_FEATURE_FIND_PERM( "-perm" ,)
USE_FEATURE_FIND_MTIME( "-mtime" ,)
USE_FEATURE_FIND_MMIN( "-mmin" ,)
USE_FEATURE_FIND_NEWER( "-newer" ,)
USE_FEATURE_FIND_INUM( "-inum" ,)
USE_FEATURE_FIND_EXEC( "-exec" ,)
USE_FEATURE_FIND_USER( "-user" ,)
USE_FEATURE_FIND_GROUP( "-group" ,)
USE_FEATURE_FIND_DEPTH( "-depth" ,)
USE_FEATURE_FIND_PAREN( "(" ,)
USE_FEATURE_FIND_SIZE( "-size" ,)
USE_FEATURE_FIND_PRUNE( "-prune" ,)
USE_FEATURE_FIND_DELETE("-delete",)
"-a" ,
"-o" ,
USE_FEATURE_FIND_NOT( "!" ,)
#if ENABLE_DESKTOP
"-and" ,
"-or" ,
USE_FEATURE_FIND_NOT( "-not" ,)
"-and" ,
"-or" ,
USE_FEATURE_FIND_NOT( "-not" ,)
#endif
NULL
"-print" ,
USE_FEATURE_FIND_PRINT0( "-print0" ,)
USE_FEATURE_FIND_DEPTH( "-depth" ,)
USE_FEATURE_FIND_PRUNE( "-prune" ,)
USE_FEATURE_FIND_DELETE( "-delete" ,)
USE_FEATURE_FIND_EXEC( "-exec" ,)
USE_FEATURE_FIND_PAREN( "(" ,)
/* All options starting from here require argument */
"-name" ,
USE_FEATURE_FIND_PATH( "-path" ,)
USE_FEATURE_FIND_REGEX( "-regex" ,)
USE_FEATURE_FIND_TYPE( "-type" ,)
USE_FEATURE_FIND_PERM( "-perm" ,)
USE_FEATURE_FIND_MTIME( "-mtime" ,)
USE_FEATURE_FIND_MMIN( "-mmin" ,)
USE_FEATURE_FIND_NEWER( "-newer" ,)
USE_FEATURE_FIND_INUM( "-inum" ,)
USE_FEATURE_FIND_USER( "-user" ,)
USE_FEATURE_FIND_GROUP( "-group" ,)
USE_FEATURE_FIND_SIZE( "-size" ,)
USE_FEATURE_FIND_CONTEXT("-context",)
NULL
};
action*** appp;
@ -522,8 +545,19 @@ static action*** parse_params(char **argv)
*/
while (*argv) {
const char *arg = argv[0];
const char *arg1 = argv[1];
int parm = index_in_str_array(params, arg);
const char *arg1 = argv[1];
if (parm >= PARM_name) {
/* All options starting from -name require argument */
if (!arg1)
bb_error_msg_and_die(bb_msg_requires_arg, arg);
argv++;
}
/* We can use big switch() here, but on i386
* it doesn't give smaller code. Other arches? */
/* --- Operators --- */
if (parm == PARM_a USE_DESKTOP(|| parm == PARM_and)) {
/* no further special handling required */
@ -557,96 +591,22 @@ static action*** parse_params(char **argv)
(void) ALLOC_ACTION(print0);
}
#endif
else if (parm == PARM_name) {
action_name *ap;
if (!*++argv)
bb_error_msg_and_die(bb_msg_requires_arg, arg);
ap = ALLOC_ACTION(name);
ap->pattern = arg1;
}
#if ENABLE_FEATURE_FIND_PATH
else if (parm == PARM_path) {
action_path *ap;
if (!*++argv)
bb_error_msg_and_die(bb_msg_requires_arg, arg);
ap = ALLOC_ACTION(path);
ap->pattern = arg1;
#if ENABLE_FEATURE_FIND_DEPTH
else if (parm == PARM_depth) {
recurse_flags |= ACTION_DEPTHFIRST;
}
#endif
#if ENABLE_FEATURE_FIND_REGEX
else if (parm == PARM_regex) {
action_regex *ap;
if (!*++argv)
bb_error_msg_and_die(bb_msg_requires_arg, arg);
ap = ALLOC_ACTION(regex);
xregcomp(&ap->compiled_pattern, arg1, 0 /*cflags*/);
#if ENABLE_FEATURE_FIND_PRUNE
else if (parm == PARM_prune) {
USE_FEATURE_FIND_NOT( invert_flag = 0; )
(void) ALLOC_ACTION(prune);
}
#endif
#if ENABLE_FEATURE_FIND_TYPE
else if (parm == PARM_type) {
action_type *ap;
if (!*++argv)
bb_error_msg_and_die(bb_msg_requires_arg, arg);
ap = ALLOC_ACTION(type);
ap->type_mask = find_type(arg1);
}
#endif
#if ENABLE_FEATURE_FIND_PERM
/* -perm mode File's permission bits are exactly mode (octal or symbolic).
* Symbolic modes use mode 0 as a point of departure.
* -perm -mode All of the permission bits mode are set for the file.
* -perm +mode Any of the permission bits mode are set for the file.
*/
else if (parm == PARM_perm) {
action_perm *ap;
if (!*++argv)
bb_error_msg_and_die(bb_msg_requires_arg, arg);
ap = ALLOC_ACTION(perm);
ap->perm_char = arg1[0];
arg1 = plus_minus_num(arg1);
ap->perm_mask = 0;
if (!bb_parse_mode(arg1, &ap->perm_mask))
bb_error_msg_and_die("invalid mode: %s", arg1);
}
#endif
#if ENABLE_FEATURE_FIND_MTIME
else if (parm == PARM_mtime) {
action_mtime *ap;
if (!*++argv)
bb_error_msg_and_die(bb_msg_requires_arg, arg);
ap = ALLOC_ACTION(mtime);
ap->mtime_char = arg1[0];
ap->mtime_days = xatoul(plus_minus_num(arg1));
}
#endif
#if ENABLE_FEATURE_FIND_MMIN
else if (parm == PARM_mmin) {
action_mmin *ap;
if (!*++argv)
bb_error_msg_and_die(bb_msg_requires_arg, arg);
ap = ALLOC_ACTION(mmin);
ap->mmin_char = arg1[0];
ap->mmin_mins = xatoul(plus_minus_num(arg1));
}
#endif
#if ENABLE_FEATURE_FIND_NEWER
else if (parm == PARM_newer) {
action_newer *ap;
struct stat stat_newer;
if (!*++argv)
bb_error_msg_and_die(bb_msg_requires_arg, arg);
xstat(arg1, &stat_newer);
ap = ALLOC_ACTION(newer);
ap->newer_mtime = stat_newer.st_mtime;
}
#endif
#if ENABLE_FEATURE_FIND_INUM
else if (parm == PARM_inum) {
action_inum *ap;
if (!*++argv)
bb_error_msg_and_die(bb_msg_requires_arg, arg);
ap = ALLOC_ACTION(inum);
ap->inode_num = xatoul(arg1);
#if ENABLE_FEATURE_FIND_DELETE
else if (parm == PARM_delete) {
need_print = 0;
recurse_flags |= ACTION_DEPTHFIRST;
(void) ALLOC_ACTION(delete);
}
#endif
#if ENABLE_FEATURE_FIND_EXEC
@ -660,7 +620,7 @@ static action*** parse_params(char **argv)
ap->exec_argc = 0;
while (1) {
if (!*argv) /* did not see ';' until end */
bb_error_msg_and_die(bb_msg_requires_arg, arg);
bb_error_msg_and_die("-exec CMD must end by ';'");
if (LONE_CHAR(argv[0], ';'))
break;
argv++;
@ -674,33 +634,6 @@ static action*** parse_params(char **argv)
ap->subst_count[i] = count_subst(ap->exec_argv[i]);
}
#endif
#if ENABLE_FEATURE_FIND_USER
else if (parm == PARM_user) {
action_user *ap;
if (!*++argv)
bb_error_msg_and_die(bb_msg_requires_arg, arg);
ap = ALLOC_ACTION(user);
ap->uid = bb_strtou(arg1, NULL, 10);
if (errno)
ap->uid = xuname2uid(arg1);
}
#endif
#if ENABLE_FEATURE_FIND_GROUP
else if (parm == PARM_group) {
action_group *ap;
if (!*++argv)
bb_error_msg_and_die(bb_msg_requires_arg, arg);
ap = ALLOC_ACTION(group);
ap->gid = bb_strtou(arg1, NULL, 10);
if (errno)
ap->gid = xgroup2gid(arg1);
}
#endif
#if ENABLE_FEATURE_FIND_DEPTH
else if (parm == PARM_depth) {
recurse_flags |= ACTION_DEPTHFIRST;
}
#endif
#if ENABLE_FEATURE_FIND_PAREN
else if (parm == PARM_char_brace) {
action_paren *ap;
@ -723,6 +656,98 @@ static action*** parse_params(char **argv)
*endarg = (char*) ")"; /* restore NULLed parameter */
argv = endarg;
}
#endif
else if (parm == PARM_name) {
action_name *ap;
ap = ALLOC_ACTION(name);
ap->pattern = arg1;
}
#if ENABLE_FEATURE_FIND_PATH
else if (parm == PARM_path) {
action_path *ap;
ap = ALLOC_ACTION(path);
ap->pattern = arg1;
}
#endif
#if ENABLE_FEATURE_FIND_REGEX
else if (parm == PARM_regex) {
action_regex *ap;
ap = ALLOC_ACTION(regex);
xregcomp(&ap->compiled_pattern, arg1, 0 /*cflags*/);
}
#endif
#if ENABLE_FEATURE_FIND_TYPE
else if (parm == PARM_type) {
action_type *ap;
ap = ALLOC_ACTION(type);
ap->type_mask = find_type(arg1);
}
#endif
#if ENABLE_FEATURE_FIND_PERM
/* -perm mode File's permission bits are exactly mode (octal or symbolic).
* Symbolic modes use mode 0 as a point of departure.
* -perm -mode All of the permission bits mode are set for the file.
* -perm +mode Any of the permission bits mode are set for the file.
*/
else if (parm == PARM_perm) {
action_perm *ap;
ap = ALLOC_ACTION(perm);
ap->perm_char = arg1[0];
arg1 = plus_minus_num(arg1);
ap->perm_mask = 0;
if (!bb_parse_mode(arg1, &ap->perm_mask))
bb_error_msg_and_die("invalid mode: %s", arg1);
}
#endif
#if ENABLE_FEATURE_FIND_MTIME
else if (parm == PARM_mtime) {
action_mtime *ap;
ap = ALLOC_ACTION(mtime);
ap->mtime_char = arg1[0];
ap->mtime_days = xatoul(plus_minus_num(arg1));
}
#endif
#if ENABLE_FEATURE_FIND_MMIN
else if (parm == PARM_mmin) {
action_mmin *ap;
ap = ALLOC_ACTION(mmin);
ap->mmin_char = arg1[0];
ap->mmin_mins = xatoul(plus_minus_num(arg1));
}
#endif
#if ENABLE_FEATURE_FIND_NEWER
else if (parm == PARM_newer) {
struct stat stat_newer;
action_newer *ap;
ap = ALLOC_ACTION(newer);
xstat(arg1, &stat_newer);
ap->newer_mtime = stat_newer.st_mtime;
}
#endif
#if ENABLE_FEATURE_FIND_INUM
else if (parm == PARM_inum) {
action_inum *ap;
ap = ALLOC_ACTION(inum);
ap->inode_num = xatoul(arg1);
}
#endif
#if ENABLE_FEATURE_FIND_USER
else if (parm == PARM_user) {
action_user *ap;
ap = ALLOC_ACTION(user);
ap->uid = bb_strtou(arg1, NULL, 10);
if (errno)
ap->uid = xuname2uid(arg1);
}
#endif
#if ENABLE_FEATURE_FIND_GROUP
else if (parm == PARM_group) {
action_group *ap;
ap = ALLOC_ACTION(group);
ap->gid = bb_strtou(arg1, NULL, 10);
if (errno)
ap->gid = xgroup2gid(arg1);
}
#endif
#if ENABLE_FEATURE_FIND_SIZE
else if (parm == PARM_size) {
@ -746,24 +771,18 @@ static action*** parse_params(char **argv)
{ NULL, 0 }
};
action_size *ap;
if (!*++argv)
bb_error_msg_and_die(bb_msg_requires_arg, arg);
ap = ALLOC_ACTION(size);
ap->size_char = arg1[0];
ap->size = XATOU_SFX(plus_minus_num(arg1), find_suffixes);
}
#endif
#if ENABLE_FEATURE_FIND_PRUNE
else if (parm == PARM_prune) {
USE_FEATURE_FIND_NOT( invert_flag = 0; )
(void) ALLOC_ACTION(prune);
}
#endif
#if ENABLE_FEATURE_FIND_DELETE
else if (parm == PARM_delete) {
need_print = 0;
recurse_flags |= ACTION_DEPTHFIRST;
(void) ALLOC_ACTION(delete);
#if ENABLE_FEATURE_FIND_CONTEXT
else if (parm == PARM_context) {
action_context *ap;
ap = ALLOC_ACTION(context);
ap->context = NULL;
if (selinux_raw_to_trans_context(arg1, &ap->context))
bb_perror_msg("%s", arg1);
}
#endif
else {

2
include/usage.h
View File

@ -981,6 +981,8 @@
USE_FEATURE_FIND_PRINT0( \
"\n -print0 Delimit output with null characters rather than" \
"\n newlines") \
USE_FEATURE_FIND_CONTEXT ( \
"\n -context File has specified security context") \
USE_FEATURE_FIND_EXEC( \
"\n -exec CMD ARG ; Execute CMD with all instances of {} replaced by the" \
"\n matching files") \