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authorLaurent Bercot <ska-skaware@skarnet.org>2014-09-18 18:55:44 +0000
committerLaurent Bercot <ska-skaware@skarnet.org>2014-09-18 18:55:44 +0000
commit3534b428629be185e096be99e3bd5fdfe32d5544 (patch)
tree210ef3198ed66bc7f7b7bf6a85e4579f455e5a36 /src/libstddjb/lock_sh.c
downloadskalibs-3534b428629be185e096be99e3bd5fdfe32d5544.tar.xz
initial commit with rc for skalibs-2.0.0.0
Diffstat (limited to 'src/libstddjb/lock_sh.c')
-rw-r--r--src/libstddjb/lock_sh.c37
1 files changed, 37 insertions, 0 deletions
diff --git a/src/libstddjb/lock_sh.c b/src/libstddjb/lock_sh.c
new file mode 100644
index 0000000..4a42dc1
--- /dev/null
+++ b/src/libstddjb/lock_sh.c
@@ -0,0 +1,37 @@
+/* ISC license. */
+
+#include <skalibs/sysdeps.h>
+
+#ifdef SKALIBS_HASFLOCK
+
+#include <skalibs/nonposix.h>
+#include <errno.h>
+#include <sys/file.h>
+#include <skalibs/djbunix.h>
+
+int lock_sh (int fd)
+{
+ register int r ;
+ do
+ r = flock(fd, LOCK_SH) ;
+ while ((r == -1) && (errno == EINTR)) ;
+ return r ;
+}
+
+#else
+
+#include <sys/types.h>
+#include <unistd.h>
+#include <errno.h>
+#include <skalibs/djbunix.h>
+
+int lock_sh (int fd)
+{
+ register int r ;
+ do
+ r = lockf(fd, F_LOCK, 0) ;
+ while ((r == -1) && (errno == EINTR)) ;
+ return r ;
+}
+
+#endif