Attachment 218237 Details for Bug 249567 – fcntl F_SETLK test case

fcntl F_SETLK test case

fcntl_setlk.c (text/plain), 1.20 KB, created by Björn Fischer on 2020-09-24 09:39:08 UTC

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Creator: Björn Fischer

Created: 2020-09-24 09:39:08 UTC

Size: 1.20 KB

patch

obsolete

>
>#include <unistd.h>
>#include <fcntl.h>
>#include <sys/types.h>
>#include <sys/stat.h>
>#include <stdio.h>
>#include <stdlib.h>
>#include <errno.h>
>#include <string.h>
>
>char data[] = "Lorem ipsum dolor sit amet";
>
>int main( int argc, char *argv[] ) {
>
>    char fname[] = "fcntl.test.XXXXXX";
>    int fd = mkstemp(fname);
>    write(fd, data, sizeof(data));
>
>    struct flock lock;
>    lock.l_type = F_RDLCK;
>    lock.l_whence = SEEK_SET;
>    lock.l_start = 0;
>    lock.l_len = 1;
>    lock.l_pid = getpid();
>
>
>    struct flock unlock;
>    unlock.l_type = F_UNLCK;
>    unlock.l_whence = SEEK_SET;
>    unlock.l_start = 0;
>    unlock.l_len = 1;
>    unlock.l_pid = getpid();
>
>    int c = 0;
>    while (c++ < 100000000) {
>
>        errno = 0;
>        int res = fcntl(fd, F_SETLK, &lock);
>        if (res < 0) {
>            printf("F_SETLK F_RDLCK res = %d (%s)\n",
>                res, strerror(errno));
>            break;
>        }
>        
>        errno = 0;
>        res = fcntl(fd, F_SETLK, &unlock);
>        if (res < 0) {
>            printf("F_SETLK F_UNLCK res = %d (%s)\n",
>                res, strerror(errno));
>            break;
>        }
>
>    }
>
>    printf("Successful cycles: %d\n", c - 1);
>    close(fd);
>    unlink(fname);
>
>}
>

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Attachments on bug 249567: 218237 | 218307