From 2ce1fe251ee30ddb7b116fe7d02d9d517931141b Mon Sep 17 00:00:00 2001
From: Kolan Sh <mecareful@gmail.com>
Date: Thu, 30 Jun 2011 19:12:23 +0400
Subject: [PATCH] =?UTF-8?q?=D0=A0=D0=B0=D0=B7=D0=BE=D0=B1=D1=80=D0=B0?=
 =?UTF-8?q?=D0=BB=D1=81=D1=8F,=20=D0=BA=D0=B0=D0=BA=20=D0=BB=D0=BE=D1=87?=
 =?UTF-8?q?=D0=B8=D1=82=D1=8C=20=D1=84=D0=B0=D0=B9=D0=BB=20=D0=BD=D0=B0=20?=
 =?UTF-8?q?CIFS.?=
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---
 c/fcntl_ex/fcntl_lockfile.c | 66 +++++++++++++++++++++++++++++--------
 1 file changed, 53 insertions(+), 13 deletions(-)

diff --git a/c/fcntl_ex/fcntl_lockfile.c b/c/fcntl_ex/fcntl_lockfile.c
index 9417642..9027355 100644
--- a/c/fcntl_ex/fcntl_lockfile.c
+++ b/c/fcntl_ex/fcntl_lockfile.c
@@ -7,15 +7,12 @@
 #include <signal.h>
 #include <err.h>
 #include <errno.h>
+#include <string.h>
 
-void sighandler(int signum)
+/* не работает с nfs */
+void ex1()
 {
-	printf("signal %d received\n", signum);
-}
 
-int main()
-{
-/* не работает с nfs
 	FILE *f = fopen("fcntl_lockfile.c", "wb");
 
 	if(f != NULL && !flock(fileno(f), LOCK_EX | LOCK_NB))// !ftrylockfile(f))
@@ -25,11 +22,11 @@ int main()
 		puts("Failed!");
 
 	getchar();
+}
 
-	return 0;
-*/
-
-/* 1 процесс
+/* только для 1-го процесса */
+void ex2()
+{
 	FILE *f = fopen("fcntl_lockfile.c", "wb");
 
 	if(f != NULL && !ftrylockfile(f)) {
@@ -40,13 +37,21 @@ int main()
 		puts("Failed!");
 
 	getchar();
+}
 
-	return 0;
-*/
-
+/* с cifs не работает */
+void sighandler(int signum)
+{
+	printf("signal %d received\n", signum);
+}
+void ex3()
+{
 	signal(SIGPOLL, sighandler);
 
 	int fd = open("fcntl_lockfile.c", O_RDWR | O_NONBLOCK);
+	//~ int fd = open("/mnt/smb/fs04/Users/ПРОЕКТЫ/Отчетник Климов/lock_ex", O_RDWR | O_NONBLOCK);
+	//~ int fd = open("/mnt/smb/kolan/shared/lock_ex", O_RDWR | O_NONBLOCK);
+
 
 	if (fd == -1)
 		err(errno, "open()");
@@ -57,6 +62,41 @@ int main()
 	puts("Success!");
 
 	getchar();
+}
+
+/* зашибись - метод :)
+ * Консультативная (advisory) блокировка... */
+
+void ex4()
+{
+	signal(SIGPOLL, sighandler);
+
+	//~ int fd = open("fcntl_lockfile.c", O_RDWR | O_NONBLOCK);
+	//~ int fd = open("/mnt/smb/fs04/Users/ПРОЕКТЫ/Отчетник Климов/lock_ex", O_RDWR | O_NONBLOCK);
+	int fd = open("/mnt/smb/kolan/shared/lock_ex", O_RDWR | O_NONBLOCK);
+
+
+	if (fd == -1)
+		err(errno, "open()");
+
+	struct flock flck;
+	memset(&flck, 0, sizeof(flck));
+	flck.l_type = F_WRLCK;
+
+	if (fcntl(fd, F_SETLK, &flck) == -1)
+		err(errno, "fcntl()");
+
+	puts("Success!");
+
+	getchar();
+}
+
+int main()
+{
+	//~ ex1();
+	//~ ex2();
+	//~ ex3();
+	ex4();
 
 	return 0;
 }