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/*
* libexplain - Explain errno values returned by libc functions
* Copyright (C) 2008-2010 Peter Miller
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or (at
* your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <libexplain/ac/stdio.h>
#include <libexplain/ac/stdlib.h>
#include <libexplain/ac/string.h>
#include <libexplain/ac/sys/select.h>
#include <libexplain/select.h>
#include <libexplain/strtol.h>
#include <libexplain/wrap_and_print.h>
#include <explain/syscall/select.h>
void
explain_syscall_select(int errnum, int argc, char **argv)
{
int nfds;
fd_set readfds;
fd_set *readfds_p;
fd_set writefds;
fd_set *writefds_p;
fd_set exceptfds;
fd_set *exceptfds_p;
struct timeval timeout;
FD_ZERO(&readfds);
readfds_p = &readfds;
FD_ZERO(&writefds);
writefds_p = &writefds;
FD_ZERO(&exceptfds);
exceptfds_p = &exceptfds;
FD_SET(fileno(stdin), &readfds);
FD_SET(fileno(stdout), &writefds);
timeout.tv_sec = 60;
timeout.tv_usec = 0;
switch (argc)
{
case 5:
{
double seconds;
seconds = atof(argv[4]);
timeout.tv_sec = (long)seconds;
timeout.tv_usec = (long)(1e6 * (seconds - timeout.tv_sec));
}
/* fall through... */
case 4:
exceptfds_p = (fd_set *)explain_strtol_or_die(argv[3], 0, 0);
/* fall through... */
case 3:
writefds_p = (fd_set *)explain_strtol_or_die(argv[2], 0, 0);
/* fall through... */
case 2:
readfds_p = (fd_set *)explain_strtol_or_die(argv[1], 0, 0);
/* fall through... */
case 1:
nfds = explain_strtol_or_die(argv[0], 0, 0);
break;
default:
fprintf(stderr, "select: requires 5 arguments, not %d\n", argc);
exit(EXIT_FAILURE);
}
explain_wrap_and_print
(
stdout,
explain_errno_select
(
errnum,
nfds,
readfds_p,
writefds_p,
exceptfds_p,
&timeout
)
);
}
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