POSIX: lseek: support SEEK_DATA and SEEK_HOLE constants

this is queued for issue 8: https://www.austingroupbugs.net/view.php?id=415 this implementation calls the ioctl hook of the filesystem with BSD-like constants FIOSEEKDATA and FIOSEEKHOLE. if the hook doesn't know the constants, we use the stat size to return the last hole (as proposed in the draft spec). Change-Id: I5d052eed87e29b70491a7ff534e244896469d03e Reviewed-on: https://review.haiku-os.org/c/haiku/+/3385 Reviewed-by: Jérôme Duval <[email protected]>
2020-11-12 10:42:11 +00:00
parent fe357eb9c9
commit a9c09fcaae
3 changed files with 43 additions and 0 deletions
@@ -12,4 +12,7 @@
 #define FIONBIO 	0xbe000000
 #define FIONREAD	0xbe000001

+#define FIOSEEKDATA	0xbe000002
+#define FIOSEEKHOLE	0xbe000003
+
 #endif	/* _SYS_IOCTL_H */
@@ -151,6 +151,12 @@
 #ifndef SEEK_END
 #	define SEEK_END 2
 #endif
+#ifndef SEEK_DATA
+#	define SEEK_DATA 3
+#endif
+#ifndef SEEK_HOLE
+#	define SEEK_HOLE 4
+#endif


 #ifdef __cplusplus