locale-util: two fixlets for supporting musl (#39689)

sys/prctl.h anyway includes linux/prctl.h and actually these .c files
includes sys/prctl.h. Hence, it is not necessary to explicitly include
linux/prctl.h.

src/basic/capability-util.c

@@ -1,6 +1,5 @@
 /* SPDX-License-Identifier: LGPL-2.1-or-later */
 
-#include <linux/prctl.h>
 #include <stdatomic.h>
 #include <stdio.h>
 #include <sys/prctl.h>

src/basic/locale-util.c

@@ -5,6 +5,7 @@
 #include <stdlib.h>
 #include <sys/mman.h>
 #include <sys/stat.h>
+#include <unistd.h>
 
 #include "dirent-util.h"
 #include "env-util.h"
@@ -54,6 +55,7 @@ static char* normalize_locale(const char *name) {
         return strdup(name);
 }
 
+#ifdef __GLIBC__
 static int add_locales_from_archive(Set *locales) {
         /* Stolen from glibc... */
 
@@ -182,6 +184,34 @@ static int add_locales_from_libdir(Set *locales) {
         return 0;
 }
 
+#else
+
+static int add_locales_for_musl(Set *locales) {
+        int r;
+
+        assert(locales);
+
+        _cleanup_closedir_ DIR *dir = opendir("/usr/share/i18n/locales/musl/");
+        if (!dir)
+                return errno == ENOENT ? 0 : -errno;
+
+        FOREACH_DIRENT(de, dir, return -errno) {
+                if (de->d_type != DT_REG)
+                        continue;
+
+                char *z = normalize_locale(de->d_name);
+                if (!z)
+                        return -ENOMEM;
+
+                r = set_consume(locales, z);
+                if (r < 0)
+                        return r;
+        }
+
+        return 0;
+}
+#endif
+
 int get_locales(char ***ret) {
         _cleanup_set_free_ Set *locales = NULL;
         int r;
@@ -190,6 +220,7 @@ int get_locales(char ***ret) {
         if (!locales)
                 return -ENOMEM;
 
+#ifdef __GLIBC__
         r = add_locales_from_archive(locales);
         if (r < 0 && r != -ENOENT)
                 return r;
@@ -197,6 +228,11 @@ int get_locales(char ***ret) {
         r = add_locales_from_libdir(locales);
         if (r < 0)
                 return r;
+#else
+        r = add_locales_for_musl(locales);
+        if (r < 0)
+                return r;
+#endif
 
         char *locale;
         SET_FOREACH(locale, locales) {
@@ -264,11 +300,25 @@ int locale_is_installed(const char *name) {
         if (STR_IN_SET(name, "C", "POSIX")) /* These ones are always OK */
                 return true;
 
+#ifdef __GLIBC__
         _cleanup_(freelocalep) locale_t loc = newlocale(LC_ALL_MASK, name, (locale_t) 0);
         if (loc == (locale_t) 0)
                 return errno == ENOMEM ? -ENOMEM : false;
 
         return true;
+#else
+        /* musl also has C.UTF-8 as builtin */
+        if (streq(name, "C.UTF-8"))
+                return true;
+
+        /* musl's newlocale() always succeeds and provides a fake locale object even when the locale does
+         * not exist. Hence, we need to explicitly check if the locale file exists. */
+        _cleanup_free_ char *p = path_join("/usr/share/i18n/locales/musl/", name);
+        if (!p)
+                return -ENOMEM;
+
+        return access(p, F_OK) >= 0;
+#endif
 }
 
 static bool is_locale_utf8_impl(void) {

src/core/exec-invoke.c

@@ -1,7 +1,6 @@
 /* SPDX-License-Identifier: LGPL-2.1-or-later */
 
 #include <grp.h>
-#include <linux/prctl.h>
 #include <linux/sched.h>
 #include <linux/securebits.h>
 #include <poll.h>

src/core/execute.c

@@ -1,7 +1,6 @@
 /* SPDX-License-Identifier: LGPL-2.1-or-later */
 
 #include <fcntl.h>
-#include <linux/prctl.h>
 #include <poll.h>
 #include <sys/mman.h>
 #include <sys/mount.h>

src/include/override/net/if.h

@@ -1,10 +1,9 @@
 /* SPDX-License-Identifier: LGPL-2.1-or-later */
 #pragma once
 
-#include <features.h>
 #include <linux/if.h>   /* IWYU pragma: export */
 
 #define IF_NAMESIZE       16
 
-extern unsigned int if_nametoindex(const char *__ifname) __THROW;
-extern char *if_indextoname(unsigned int __ifindex, char __ifname[IF_NAMESIZE]) __THROW;
+extern unsigned int if_nametoindex(const char *__ifname);
+extern char *if_indextoname(unsigned int __ifindex, char __ifname[IF_NAMESIZE]);

src/include/override/sys/mount.h

@@ -2,7 +2,6 @@
 #pragma once
 
 #include <fcntl.h>
-#include <features.h>
 #include <linux/fs.h>
 #include <linux/mount.h> /* IWYU pragma: export */
 #include <stddef.h>
@@ -29,20 +28,20 @@ enum
 };
 
 /* Mount a filesystem.  */
-extern int mount(const char *__special_file, const char *__dir, const char *__fstype, unsigned long int __rwflag, const void *__data) __THROW;
+extern int mount(const char *__special_file, const char *__dir, const char *__fstype, unsigned long int __rwflag, const void *__data);
 
 /* Unmount a filesystem.  */
-extern int umount(const char *__special_file) __THROW;
+extern int umount(const char *__special_file);
 
 /* Unmount a filesystem.  Force unmounting if FLAGS is set to MNT_FORCE.  */
-extern int umount2(const char *__special_file, int __flags) __THROW;
+extern int umount2(const char *__special_file, int __flags);
 
 /* Open the filesystem referenced by FS_NAME so it can be configured for
    mouting.  */
 /* Defined since glibc-2.36.
  * Supported since kernel v5.2 (24dcb3d90a1f67fe08c68a004af37df059d74005). */
 #if HAVE_FSOPEN
-extern int fsopen(const char *__fs_name, unsigned int __flags) __THROW;
+extern int fsopen(const char *__fs_name, unsigned int __flags);
 #else
 int missing_fsopen(const char *fsname, unsigned flags);
 #  define fsopen missing_fsopen
@@ -53,7 +52,7 @@ int missing_fsopen(const char *fsname, unsigned flags);
 /* Defined since glibc-2.36.
  * Supported since kernel v5.2 (93766fbd2696c2c4453dd8e1070977e9cd4e6b6d). */
 #if HAVE_FSMOUNT
-extern int fsmount(int __fd, unsigned int __flags, unsigned int __ms_flags) __THROW;
+extern int fsmount(int __fd, unsigned int __flags, unsigned int __ms_flags);
 #else
 int missing_fsmount(int fd, unsigned flags, unsigned ms_flags);
 #  define fsmount missing_fsmount
@@ -65,7 +64,7 @@ int missing_fsmount(int fd, unsigned flags, unsigned ms_flags);
 /* Defined since glibc-2.36.
  * Supported since kernel v5.2 (2db154b3ea8e14b04fee23e3fdfd5e9d17fbc6ae). */
 #if HAVE_MOVE_MOUNT
-extern int move_mount(int __from_dfd, const char *__from_pathname, int __to_dfd, const char *__to_pathname, unsigned int flags) __THROW;
+extern int move_mount(int __from_dfd, const char *__from_pathname, int __to_dfd, const char *__to_pathname, unsigned int flags);
 #else
 int missing_move_mount(int from_dfd, const char *from_pathname, int to_dfd, const char *to_pathname, unsigned flags);
 #  define move_mount missing_move_mount
@@ -76,7 +75,7 @@ int missing_move_mount(int from_dfd, const char *from_pathname, int to_dfd, cons
 /* Defined since glibc-2.36.
  * Supported since kernel v5.2 (ecdab150fddb42fe6a739335257949220033b782). */
 #if HAVE_FSCONFIG
-extern int fsconfig(int __fd, unsigned int __cmd, const char *__key, const void *__value, int __aux) __THROW;
+extern int fsconfig(int __fd, unsigned int __cmd, const char *__key, const void *__value, int __aux);
 #else
 int missing_fsconfig(int fd, unsigned cmd, const char *key, const void *value, int aux);
 #  define fsconfig missing_fsconfig
@@ -86,7 +85,7 @@ int missing_fsconfig(int fd, unsigned cmd, const char *key, const void *value, i
 /* Defined since glibc-2.36.
  * Supported since kernel v5.2 (a07b20004793d8926f78d63eb5980559f7813404). */
 #if HAVE_OPEN_TREE
-extern int open_tree(int __dfd, const char *__filename, unsigned int __flags) __THROW;
+extern int open_tree(int __dfd, const char *__filename, unsigned int __flags);
 #else
 int missing_open_tree(int dfd, const char *filename, unsigned flags);
 #  define open_tree missing_open_tree
@@ -100,7 +99,7 @@ int missing_open_tree(int dfd, const char *filename, unsigned flags);
 /* Defined since glibc-2.36.
  * Supported since kernel v5.12 (2a1867219c7b27f928e2545782b86daaf9ad50bd). */
 #if HAVE_MOUNT_SETATTR
-extern int mount_setattr(int __dfd, const char *__path, unsigned int __flags, struct mount_attr *__uattr, size_t __usize) __THROW;
+extern int mount_setattr(int __dfd, const char *__path, unsigned int __flags, struct mount_attr *__uattr, size_t __usize);
 #else
 int missing_mount_setattr(int dfd, const char *path, unsigned flags, struct mount_attr *attr, size_t size);
 #  define mount_setattr missing_mount_setattr
@@ -109,7 +108,7 @@ int missing_mount_setattr(int dfd, const char *path, unsigned flags, struct moun
 /* Not defined in glibc yet as of glibc-2.41.
  * Supported since kernel v6.15 (c4a16820d90199409c9bf01c4f794e1e9e8d8fd8). */
 #if HAVE_OPEN_TREE_ATTR
-extern int open_tree_attr(int __dfd, const char *__filename, unsigned int __flags, struct mount_attr *__uattr, size_t __usize) __THROW;
+extern int open_tree_attr(int __dfd, const char *__filename, unsigned int __flags, struct mount_attr *__uattr, size_t __usize);
 #else
 int missing_open_tree_attr(int dfd, const char *filename, unsigned int flags, struct mount_attr *attr, size_t size);
 #  define open_tree_attr missing_open_tree_attr

src/libsystemd/sd-bus/test-bus-error.c

@@ -229,9 +229,7 @@ TEST(sd_bus_error_set_errnof) {
 
         assert_se(sd_bus_error_set_errnof(&error, EACCES, NULL) == -EACCES);
         assert_se(sd_bus_error_has_name(&error, SD_BUS_ERROR_ACCESS_DENIED));
-        errno = EACCES;
-        assert_se(asprintf(&str, "%m") >= 0);
-        assert_se(streq(error.message, str));
+        ASSERT_STREQ(error.message, STRERROR(EACCES));
         assert_se(error._need_free == 0);
 
         str = mfree(str);
@@ -239,9 +237,7 @@ TEST(sd_bus_error_set_errnof) {
 
         assert_se(sd_bus_error_set_errnof(&error, ENOANO, NULL) == -ENOANO);
         assert_se(sd_bus_error_has_name(&error, "System.Error.ENOANO"));
-        errno = ENOANO;
-        assert_se(asprintf(&str, "%m") >= 0);
-        assert_se(streq(error.message, str));
+        ASSERT_STREQ(error.message, STRERROR(ENOANO));
         assert_se(error._need_free == 1);
 
         str = mfree(str);
@@ -249,9 +245,7 @@ TEST(sd_bus_error_set_errnof) {
 
         assert_se(sd_bus_error_set_errnof(&error, 100000, NULL) == -100000);
         assert_se(sd_bus_error_has_name(&error, SD_BUS_ERROR_FAILED));
-        errno = 100000;
-        assert_se(asprintf(&str, "%m") >= 0);
-        assert_se(streq(error.message, str));
+        ASSERT_STREQ(error.message, STRERROR(100000));
         assert_se(error._need_free == 1);
 
         str = mfree(str);

src/test/test-capability-util.c

@@ -1,6 +1,5 @@
 /* SPDX-License-Identifier: LGPL-2.1-or-later */
 
-#include <linux/prctl.h>
 #include <netinet/in.h>
 #include <pwd.h>
 #include <stdlib.h>

src/test/test-execute.c

@@ -1,7 +1,6 @@
 /* SPDX-License-Identifier: LGPL-2.1-or-later */
 
 #include <fnmatch.h>
-#include <linux/prctl.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <sys/mount.h>

src/test/test-namespace.c

@@ -1,7 +1,6 @@
 /* SPDX-License-Identifier: LGPL-2.1-or-later */
 
 #include <fcntl.h>
-#include <linux/prctl.h>
 #include <sched.h>
 #include <stdlib.h>
 #include <sys/prctl.h>