Avoid blocking

[collinm]

hi

in a c program, i copy often file on nfs

to see if i can see the nfs i do something like:

if((exist = stat(mnt_dir, &buf))==0){

if((fp = fopen(tmp_mnt_dir_www, "w"))!=NULL)
{
}
else
printf("problem\n");
}

my problem is: if nfs is not available, my program seem to block,
freeze a couple of second... is there a way to avoid that?


thanks

 

[Lawrence Kirby]

hi

in a c program, i copy often file on nfs

to see if i can see the nfs i do something like:

if((exist = stat(mnt_dir, &buf))==0){

if((fp = fopen(tmp_mnt_dir_www, "w"))!=NULL)
{
}
else
printf("problem\n");
}

my problem is: if nfs is not available, my program seem to block,
freeze a couple of second... is there a way to avoid that?

Not in standard C. The delay is proably the time it takes for the system
to decide that NFS isn't responding. You might be able to tune NFS on the
system but that is well beyond the scope of the C language and this
newsgroup. You may have better luck in a newsgroup relating to your system.

Lawrence

 

[CBFalconer]

in a c program, i copy often file on nfs
to see if i can see the nfs i do something like:

if((exist = stat(mnt_dir, &buf))==0){

if((fp = fopen(tmp_mnt_dir_www, "w"))!=NULL)
{
}
else
printf("problem\n");
}

my problem is: if nfs is not available, my program seem to block,
freeze a couple of second... is there a way to avoid that?

This is comp.lang.c, where we discuss only the standard C language,
as defined in the C90, C99 (and older K&R) standards. This means
you must either publish the source of routines you call, or call
routines defined in the standard. stat fits into neither
category. Thus if you do get a reply it is likely to be wrong,
certainly will not be reviewed by knowledgeable people, and the
whole mess is off-topic here.

You may want to try a newsgroup that handles Posix or Unix.

 

[Dave Thompson]

Not in standard C. The delay is proably the time it takes for the system
to decide that NFS isn't responding. You might be able to tune NFS on the

system but that is well beyond the scope of the C language and this
newsgroup. You may have better luck in a newsgroup relating to your system.

Or one for the problematic feature: comp.protocols.nfs .

- David.Thompson1 at worldnet.att.net