Attachment 289750 Details for Bug 425911 – Test lock file

Test lock file

filetest.c (text/x-csrc), 1.17 KB, created by Wade Mealing on 2007-12-17 07:20:44 UTC

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Filename:

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Creator: Wade Mealing

Created: 2007-12-17 07:20:44 UTC

Size: 1.17 KB

patch

obsolete

>#include <stdio.h>
>#include <fcntl.h>
>#include <sys/types.h>
>#include <sys/stat.h>
>#include <stdlib.h>
>#include <errno.h>
>
>
>int main( int argc, char** argv) {
>
>
>char* fname;
>int done; 
>int i,handle; 
>int ret;
>struct flock lock;
>
>
>if ( argc != 2 ) {
>
>	fprintf(stdout, "Usage: FileTest <path/filename>\n");
>	exit(0);
>}
>
>fprintf(stdout, "Opening handle for file: %s\n", argv[1]);
>
>handle = open( argv[1], O_RDWR | O_CREAT | O_SYNC, S_IRUSR | S_IWUSR );
>
>if (handle == -1) {
>       fprintf(stderr, "Error from open(): %d\n", errno);
>       exit(1) ;
>}
>
>
>
>fprintf(stdout, "Trying to acquire file lock!\n");
>
> 
>
>      ret = -1;
>      lock.l_type = F_WRLCK;
>      lock.l_start = 0;
>      lock.l_whence = SEEK_SET; /* from beginning of file */
>      lock.l_len = 1; /* lock first byte */
>      ret = fcntl(handle,F_SETLK,&lock);
>
>      if (ret != 0) {
>
>         close(handle);
>         fprintf(stderr, "Error from fcntl() for file locking: %d\n",  errno);
>         exit(1);
>
>      }
>
>
> fprintf(stdout, "Lock obtained!\n");
> fprintf(stdout, "Terminate with ^C for ungraceful shutdown or enter to continue.\n");
> i = getchar();
> fprintf(stdout, "Shut down gracefully!\n");
> close(handle);
>
> 
> exit(0);
>
>
>}
>

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Attachments on bug 425911: 289750