https://github.com/systemd/systemd/pull/27599 From d096e05c625ea825eb4d781216ded717b7f71cca Mon Sep 17 00:00:00 2001 From: Sam James Date: Wed, 10 May 2023 01:47:13 +0100 Subject: [PATCH] dirent: conditionalize dirent assert based on dirent64 existence >=musl-1.2.4 doesn't define dirent64 and its LFS friends as its "native" functions are already LFS-aware. Check for dirent64 in meson.build and only assert if it exists. Bug: https://bugs.gentoo.org/905900 Closes: https://github.com/systemd/systemd/pull/25809 --- a/meson.build +++ b/meson.build @@ -599,6 +599,7 @@ decl_headers = ''' # define _GNU_SOURCE 1 # endif // _GNU_SOURCE #endif // 1 +#include #include #include #include @@ -608,6 +609,7 @@ foreach decl : ['char16_t', 'char32_t', 'struct mount_attr', 'struct statx', + 'struct dirent64', ] # We get -1 if the size cannot be determined --- a/src/basic/dirent-util.h +++ b/src/basic/dirent-util.h @@ -39,6 +39,7 @@ struct dirent *readdir_no_dot(DIR *dirp); /* Only if 64bit off_t is enabled struct dirent + struct dirent64 are actually the same. We require this, and * we want them to be interchangeable to make getdents64() work, hence verify that. */ assert_cc(_FILE_OFFSET_BITS == 64); +#if HAVE_STRUCT_DIRENT64 assert_cc(sizeof(struct dirent) == sizeof(struct dirent64)); assert_cc(offsetof(struct dirent, d_ino) == offsetof(struct dirent64, d_ino)); assert_cc(sizeof_field(struct dirent, d_ino) == sizeof_field(struct dirent64, d_ino)); @@ -50,6 +51,7 @@ assert_cc(offsetof(struct dirent, d_type) == offsetof(struct dirent64, d_type)); assert_cc(sizeof_field(struct dirent, d_type) == sizeof_field(struct dirent64, d_type)); assert_cc(offsetof(struct dirent, d_name) == offsetof(struct dirent64, d_name)); assert_cc(sizeof_field(struct dirent, d_name) == sizeof_field(struct dirent64, d_name)); +#endif #define FOREACH_DIRENT_IN_BUFFER(de, buf, sz) \ for (void *_end = (uint8_t*) ({ (de) = (buf); }) + (sz); \