X-Git-Url: https://mattmccutchen.net/rsync/rsync.git/blobdiff_plain/2a189350f27d092fd05e85d4a08b941a26f13718..28b519c93b6db30b6520d46f8cd65160213fddd2:/syscall.c

diff --git a/syscall.c b/syscall.c
index 1d72d198..1ed36f3c 100644
--- a/syscall.c
+++ b/syscall.c
@@ -29,6 +29,10 @@
 #include <sys/attr.h>
 #endif
 
+#if defined HAVE_SYS_FALLOCATE && !defined HAVE_FALLOCATE
+#include <sys/syscall.h>
+#endif
+
 extern int dry_run;
 extern int am_root;
 extern int am_sender;
@@ -226,6 +230,22 @@ int do_rename(const char *fname1, const char *fname2)
 	return rename(fname1, fname2);
 }
 
+#ifdef HAVE_FTRUNCATE
+int do_ftruncate(int fd, OFF_T size)
+{
+	int ret;
+
+	if (dry_run) return 0;
+	RETURN_ERROR_IF_RO_OR_LO;
+
+	do {
+		ret = ftruncate(fd, size);
+	} while (ret < 0 && errno == EINTR);
+
+	return ret;
+}
+#endif
+
 void trim_trailing_slashes(char *name)
 {
 	int l;
@@ -401,3 +421,25 @@ int do_utime(const char *fname, time_t modtime, UNUSED(uint32 mod_nsec))
 #else
 #error Need utimes or utime function.
 #endif
+
+#ifdef SUPPORT_PREALLOCATION
+int do_fallocate(int fd, OFF_T offset, OFF_T length)
+{
+#ifdef FALLOC_FL_KEEP_SIZE
+#define DO_FALLOC_OPTIONS FALLOC_FL_KEEP_SIZE
+#else
+#define DO_FALLOC_OPTIONS 0
+#endif
+	RETURN_ERROR_IF(dry_run, 0);
+	RETURN_ERROR_IF_RO_OR_LO;
+#if defined HAVE_FALLOCATE
+	return fallocate(fd, DO_FALLOC_OPTIONS, offset, length);
+#elif defined HAVE_SYS_FALLOCATE
+	return syscall(SYS_fallocate, fd, DO_FALLOC_OPTIONS, (loff_t)offset, (loff_t)length);
+#elif defined HAVE_EFFICIENT_POSIX_FALLOCATE
+	return posix_fallocate(fd, offset, length);
+#else
+#error Coding error in SUPPORT_PREALLOCATION logic.
+#endif
+}
+#endif