Re: notification of cd mount

On Dec 6, 1:17 pm, Jan Panteltje <pNaonStpealm...@xxxxxxxxx> wrote:
On a sunny day (12 Sep 2006 02:52:53 -0700) it happened "Himanshu Chauhan"
<hs.chau...@xxxxxxxxx> wrote in
<1158054773.592022.154...@xxxxxxxxxxxxxxxxxxxxxxxxxxxx>:

Dear all,

Does linux has any service through which the user application can be
notified about the newly mounted cdrom or filesystem? Any callback
routines? Or the only option is a watchdog type stuff?

Thanks,

Regards

Well, it seems it waits! (likely for a CR or something).
Try this, both for 'ls -rtl' and for 'cat /dev/random'
cat /dev/random will only output when it has gathered enough stuff,
run a couple of times, and wait a long time for output on some occasions.

#include <stdlib.h>
#include <stdio.h>

int main(int argc, char **argv)
{
int a;
FILE *pptr;

//pptr = popen("ls -rtl", "r");
pptr = popen("cat /dev/random", "r");
if(!pptr)
{
fprintf(stderr, "test4: could not open ls -rtl for read, aborting.\n");

exit(1);
}

while(1)
{
a = fgetc(pptr);
if(a == EOF)
{
fprintf(stderr, "test4: EOF detected.\n");

pclose(pptr);

exit(0);
}

fprintf(stdout, "%0x2", a);
}

fprintf(stderr, "WAS HERE, OOOPS.\n");

exit(0);



} /* end function main */- Hide quoted text -

- Show quoted text -

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