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exec-util,conf-files: skip non-executable files in execute_directories()

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Fixes: #6787
This commit is contained in:
Lennart Poettering
2017-09-13 11:42:31 +02:00
parent 586377fc92
commit b50846055e
22 changed files with 68 additions and 35 deletions
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src/basic/conf-files.c
+35 -9
View File
@@ -32,11 +32,12 @@
#include "macro.h"
#include "missing.h"
#include "path-util.h"
#include "stat-util.h"
#include "string-util.h"
#include "strv.h"
#include "util.h"
static int files_add(Hashmap *h, const char *root, const char *path, const char *suffix) {
static int files_add(Hashmap *h, const char *suffix, const char *root, unsigned flags, const char *path) {
_cleanup_closedir_ DIR *dir = NULL;
const char *dirpath;
struct dirent *de;
@@ -59,6 +60,31 @@ static int files_add(Hashmap *h, const char *root, const char *path, const char
if (!dirent_is_file_with_suffix(de, suffix))
continue;
if (flags & CONF_FILES_EXECUTABLE) {
struct stat st;
/* As requested: check if the file is marked exectuable. Note that we don't check access(X_OK)
* here, as we care about whether the file is marked executable at all, and not whether it is
* executable for us, because if such errors are stuff we should log about. */
if (fstatat(dirfd(dir), de->d_name, &st, 0) < 0) {
log_debug_errno(errno, "Failed to stat %s/%s, ignoring: %m", dirpath, de->d_name);
continue;
}
/* We only want executable regular files (or symlinks to them), or symlinks to /dev/null */
if (S_ISREG(st.st_mode)) {
if ((st.st_mode & 0111) == 0) { /* not executable */
log_debug("Ignoring %s/%s, as it is not marked executable.", dirpath, de->d_name);
continue;
}
} else if (!null_or_empty(&st)) { /* /dev/null? */
log_debug("Ignoring %s/%s, as it is not a regular file (or symlink to /dev/null).", dirpath, de->d_name);
continue;
}
}
p = strjoin(dirpath, "/", de->d_name);
if (!p)
return -ENOMEM;
@@ -87,7 +113,7 @@ static int base_cmp(const void *a, const void *b) {
return strcmp(basename(s1), basename(s2));
}
static int conf_files_list_strv_internal(char ***strv, const char *suffix, const char *root, char **dirs) {
static int conf_files_list_strv_internal(char ***strv, const char *suffix, const char *root, unsigned flags, char **dirs) {
_cleanup_hashmap_free_ Hashmap *fh = NULL;
char **files, **p;
int r;
@@ -103,7 +129,7 @@ static int conf_files_list_strv_internal(char ***strv, const char *suffix, const
return -ENOMEM;
STRV_FOREACH(p, dirs) {
r = files_add(fh, root, *p, suffix);
r = files_add(fh, suffix, root, flags, *p);
if (r == -ENOMEM)
return r;
if (r < 0)
@@ -120,7 +146,7 @@ static int conf_files_list_strv_internal(char ***strv, const char *suffix, const
return 0;
}
int conf_files_list_strv(char ***strv, const char *suffix, const char *root, const char* const* dirs) {
int conf_files_list_strv(char ***strv, const char *suffix, const char *root, unsigned flags, const char* const* dirs) {
_cleanup_strv_free_ char **copy = NULL;
assert(strv);
@@ -129,10 +155,10 @@ int conf_files_list_strv(char ***strv, const char *suffix, const char *root, con
if (!copy)
return -ENOMEM;
return conf_files_list_strv_internal(strv, suffix, root, copy);
return conf_files_list_strv_internal(strv, suffix, root, flags, copy);
}
int conf_files_list(char ***strv, const char *suffix, const char *root, const char *dir, ...) {
int conf_files_list(char ***strv, const char *suffix, const char *root, unsigned flags, const char *dir, ...) {
_cleanup_strv_free_ char **dirs = NULL;
va_list ap;
@@ -145,10 +171,10 @@ int conf_files_list(char ***strv, const char *suffix, const char *root, const ch
if (!dirs)
return -ENOMEM;
return conf_files_list_strv_internal(strv, suffix, root, dirs);
return conf_files_list_strv_internal(strv, suffix, root, flags, dirs);
}
int conf_files_list_nulstr(char ***strv, const char *suffix, const char *root, const char *d) {
int conf_files_list_nulstr(char ***strv, const char *suffix, const char *root, unsigned flags, const char *d) {
_cleanup_strv_free_ char **dirs = NULL;
assert(strv);
@@ -157,5 +183,5 @@ int conf_files_list_nulstr(char ***strv, const char *suffix, const char *root, c
if (!dirs)
return -ENOMEM;
return conf_files_list_strv_internal(strv, suffix, root, dirs);
return conf_files_list_strv_internal(strv, suffix, root, flags, dirs);
}
src/basic/conf-files.h
+7 -3
View File
@@ -20,6 +20,10 @@
along with systemd; If not, see <http://www.gnu.org/licenses/>.
***/
int conf_files_list(char ***ret, const char *suffix, const char *root, const char *dir, ...);
int conf_files_list_strv(char ***ret, const char *suffix, const char *root, const char* const* dirs);
int conf_files_list_nulstr(char ***ret, const char *suffix, const char *root, const char *dirs);
enum {
CONF_FILES_EXECUTABLE = 1,
};
int conf_files_list(char ***ret, const char *suffix, const char *root, unsigned flags, const char *dir, ...);
int conf_files_list_strv(char ***ret, const char *suffix, const char *root, unsigned flags, const char* const* dirs);
int conf_files_list_nulstr(char ***ret, const char *suffix, const char *root, unsigned flags, const char *dirs);
src/basic/exec-util.c
+1 -1
View File
@@ -111,7 +111,7 @@ static int do_execute(
assert_se(prctl(PR_SET_PDEATHSIG, SIGTERM) == 0);
r = conf_files_list_strv(&paths, NULL, NULL, (const char* const*) directories);
r = conf_files_list_strv(&paths, NULL, NULL, CONF_FILES_EXECUTABLE, (const char* const*) directories);
if (r < 0)
return r;