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Разобрался, как лочить файл на CIFS.

This commit is contained in:
Kolan Sh 2011-06-30 19:12:23 +04:00
parent 4ca18afee7
commit 2ce1fe251e
1 changed files with 53 additions and 13 deletions
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66
c/fcntl_ex/fcntl_lockfile.c
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@ -7,15 +7,12 @@
#include <signal.h> #include <signal.h>
#include <err.h> #include <err.h>
#include <errno.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"); FILE *f = fopen("fcntl_lockfile.c", "wb");
if(f != NULL && !flock(fileno(f), LOCK_EX | LOCK_NB))// !ftrylockfile(f)) if(f != NULL && !flock(fileno(f), LOCK_EX | LOCK_NB))// !ftrylockfile(f))
@ -25,11 +22,11 @@ int main()
puts("Failed!"); puts("Failed!");
getchar(); getchar();
}
return 0; /* только для 1-го процесса */
*/ void ex2()
{
/* 1 процесс
FILE *f = fopen("fcntl_lockfile.c", "wb"); FILE *f = fopen("fcntl_lockfile.c", "wb");
if(f != NULL && !ftrylockfile(f)) { if(f != NULL && !ftrylockfile(f)) {
@ -40,13 +37,21 @@ int main()
puts("Failed!"); puts("Failed!");
getchar(); getchar();
}
return 0; /* с cifs не работает */
*/ void sighandler(int signum)
{
printf("signal %d received\n", signum);
}
void ex3()
{
signal(SIGPOLL, sighandler); signal(SIGPOLL, sighandler);
int fd = open("fcntl_lockfile.c", O_RDWR | O_NONBLOCK); 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) if (fd == -1)
err(errno, "open()"); err(errno, "open()");
@ -57,6 +62,41 @@ int main()
puts("Success!"); puts("Success!");
getchar(); 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; return 0;
} }