Re: kill -19 and kill -18

[Salvatore Valente]

You wrote that the sleep command exits when sent a CONT signal.
This is because the sleep(1) command is uses the sleep(3) function
call.  Here's the relevant part of Linux's sleep(3) man page:

        sleep() makes the current process sleep until _seconds_ seconds
        have  elapsed  or  a  signal  arrives  which  is  not ignored.

I guess this could be considered a bug in the sleep(1) command, or in
Linux's sleep(3) function, or not a bug at all.

Just to see if I could, I wrote a sleep(1) command that deals with
SUSP and CONT signals on Linux.  It's attached.

Have a nice day,
Sal.

#include <sys/time.h>
#include <sys/select.h>

int main (int argc, char *argv[])
{
    struct timeval tv;
    tv.tv_sec = atoi (argv[1]);
    tv.tv_usec = 0;
    return select (0, NULL, NULL, NULL, &tv);
}