basic: split out inotify-related calls from fs-util.h → inotify-util.h

src/basic/fs-util.c

@@ -682,31 +682,6 @@ int unlink_or_warn(const char *filename) {
         return 0;
 }
 
-int inotify_add_watch_fd(int fd, int what, uint32_t mask) {
-        int wd;
-
-        /* This is like inotify_add_watch(), except that the file to watch is not referenced by a path, but by an fd */
-        wd = inotify_add_watch(fd, FORMAT_PROC_FD_PATH(what), mask);
-        if (wd < 0)
-                return -errno;
-
-        return wd;
-}
-
-int inotify_add_watch_and_warn(int fd, const char *pathname, uint32_t mask) {
-        int wd;
-
-        wd = inotify_add_watch(fd, pathname, mask);
-        if (wd < 0) {
-                if (errno == ENOSPC)
-                        return log_error_errno(errno, "Failed to add a watch for %s: inotify watch limit reached", pathname);
-
-                return log_error_errno(errno, "Failed to add a watch for %s: %m", pathname);
-        }
-
-        return wd;
-}
-
 bool unsafe_transition(const struct stat *a, const struct stat *b) {
         /* Returns true if the transition from a to b is safe, i.e. that we never transition from unprivileged to
          * privileged files or directories. Why bother? So that unprivileged code can't symlink to privileged files

src/basic/fs-util.h

@@ -6,7 +6,6 @@
 #include <limits.h>
 #include <stdbool.h>
 #include <stdint.h>
-#include <sys/inotify.h>
 #include <sys/stat.h>
 #include <sys/types.h>
 #include <unistd.h>
@@ -67,21 +66,6 @@ int var_tmp_dir(const char **ret);
 
 int unlink_or_warn(const char *filename);
 
-#define INOTIFY_EVENT_MAX (sizeof(struct inotify_event) + NAME_MAX + 1)
-
-#define FOREACH_INOTIFY_EVENT(e, buffer, sz) \
-        for ((e) = &buffer.ev;                                \
-             (uint8_t*) (e) < (uint8_t*) (buffer.raw) + (sz); \
-             (e) = (struct inotify_event*) ((uint8_t*) (e) + sizeof(struct inotify_event) + (e)->len))
-
-union inotify_event_buffer {
-        struct inotify_event ev;
-        uint8_t raw[INOTIFY_EVENT_MAX];
-};
-
-int inotify_add_watch_fd(int fd, int what, uint32_t mask);
-int inotify_add_watch_and_warn(int fd, const char *pathname, uint32_t mask);
-
 enum {
         CHASE_PREFIX_ROOT = 1 << 0, /* The specified path will be prefixed by the specified root before beginning the iteration */
         CHASE_NONEXISTENT = 1 << 1, /* It's OK if the path doesn't actually exist. */

src/basic/inotify-util.c

@@ -0,0 +1,29 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+
+#include "fd-util.h"
+#include "inotify-util.h"
+
+int inotify_add_watch_fd(int fd, int what, uint32_t mask) {
+        int wd;
+
+        /* This is like inotify_add_watch(), except that the file to watch is not referenced by a path, but by an fd */
+        wd = inotify_add_watch(fd, FORMAT_PROC_FD_PATH(what), mask);
+        if (wd < 0)
+                return -errno;
+
+        return wd;
+}
+
+int inotify_add_watch_and_warn(int fd, const char *pathname, uint32_t mask) {
+        int wd;
+
+        wd = inotify_add_watch(fd, pathname, mask);
+        if (wd < 0) {
+                if (errno == ENOSPC)
+                        return log_error_errno(errno, "Failed to add a watch for %s: inotify watch limit reached", pathname);
+
+                return log_error_errno(errno, "Failed to add a watch for %s: %m", pathname);
+        }
+
+        return wd;
+}

src/basic/inotify-util.h

@@ -0,0 +1,22 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+#pragma once
+
+#include <inttypes.h>
+#include <limits.h>
+#include <stddef.h>
+#include <sys/inotify.h>
+
+#define INOTIFY_EVENT_MAX (offsetof(struct inotify_event, name) + NAME_MAX + 1)
+
+#define FOREACH_INOTIFY_EVENT(e, buffer, sz) \
+        for ((e) = &buffer.ev;                                \
+             (uint8_t*) (e) < (uint8_t*) (buffer.raw) + (sz); \
+             (e) = (struct inotify_event*) ((uint8_t*) (e) + sizeof(struct inotify_event) + (e)->len))
+
+union inotify_event_buffer {
+        struct inotify_event ev;
+        uint8_t raw[INOTIFY_EVENT_MAX];
+};
+
+int inotify_add_watch_fd(int fd, int what, uint32_t mask);
+int inotify_add_watch_and_warn(int fd, const char *pathname, uint32_t mask);

src/basic/meson.build

@@ -72,6 +72,8 @@ basic_sources = files('''
         hostname-util.h
         in-addr-util.c
         in-addr-util.h
+        inotify-util.c
+        inotify-util.h
         io-util.c
         io-util.h
         khash.c

src/basic/terminal-util.c

@@ -26,6 +26,7 @@
 #include "fd-util.h"
 #include "fileio.h"
 #include "fs-util.h"
+#include "inotify-util.h"
 #include "io-util.h"
 #include "log.h"
 #include "macro.h"