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authorElliot Thomas <elliot@midnightspark.net>2023-03-06 01:21:05 +0000
committerWaldemar Brodkorb <wbx@openadk.org>2023-03-13 07:53:24 +0100
commit4d69fcb9850b191db87d8dc8729a19c0273b95fb (patch)
treef0f08cecc460d5f8d43b2a58f9dccccc23483e2d /libc/sysdeps/linux/common/futimesat.c
parent9d549d7bc6a1b78498ee8d1f39f6a324fdfc9e5d (diff)
Emulate 'futimesat' when __NR_futimesat is not available.
Diffstat (limited to 'libc/sysdeps/linux/common/futimesat.c')
-rw-r--r--libc/sysdeps/linux/common/futimesat.c26
1 files changed, 24 insertions, 2 deletions
diff --git a/libc/sysdeps/linux/common/futimesat.c b/libc/sysdeps/linux/common/futimesat.c
index bd73eae7e..fd19fea7c 100644
--- a/libc/sysdeps/linux/common/futimesat.c
+++ b/libc/sysdeps/linux/common/futimesat.c
@@ -11,6 +11,28 @@
#ifdef __NR_futimesat
_syscall3(int, futimesat, int, fd, const char *, file, const struct timeval *, tvp)
-#else
-/* should add emulation with futimes() and /proc/self/fd/ ... */
+#elif defined __NR_utimensat
+#include <errno.h>
+#define __need_NULL
+#include <stddef.h>
+
+int futimesat(int dirfd, const char *file, const struct timeval tvp[2])
+{
+ struct timespec ts[2];
+
+ if (tvp != NULL)
+ {
+ if (tvp[0].tv_usec < 0 || tvp[0].tv_usec >= 1000000
+ || tvp[1].tv_usec < 0 || tvp[1].tv_usec >= 1000000)
+ {
+ __set_errno(EINVAL);
+ return -1;
+ }
+
+ TIMEVAL_TO_TIMESPEC(&tvp[0], &ts[0]);
+ TIMEVAL_TO_TIMESPEC(&tvp[1], &ts[1]);
+ }
+
+ return utimensat(dirfd, file, tvp ? ts : NULL, 0);
+}
#endif