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new tests for 'select'
From: |
Bruno Haible |
Subject: |
new tests for 'select' |
Date: |
Sat, 8 Nov 2008 14:33:38 +0100 |
User-agent: |
KMail/1.5.4 |
Hi,
For improving select(), I'm adding a couple of new tests for select().
Status on mingw:
- test-select-in.sh fails.
- test-select-out.sh fails.
- test-select-stdin, when run in CMD.EXE window, hangs after reading the
first byte of a line, until Return gets pressed.
- test-select-stdin, when run in a Cygwin window, from bash, notices the
input of a line only after Return has been pressed a second time.
Feel free to port the tests to poll() instead of select().
Bruno
2008-11-07 Bruno Haible <address@hidden>
* tests/test-select-fd.c: New file.
* tests/test-select-in.sh: New file.
* tests/test-select-out.sh: New file.
* tests/test-select-stdin.c: New file.
* modules/select-tests (Files): Add the new files.
(Depends-on): Add gettimeofday.
(Makefile.am): Add test-select-in.sh, test-select-out.sh to TESTS.
Set TESTS_ENVIRONMENT. Add test-select-fd, test-select-stdin to
check_PROGRAMS. Define test_select_fd_LDADD, test_select_stdin_LDADD.
======================= tests/test-select-fd.c ============================
/* Test of select() substitute, reading or writing from a given file descriptor.
Copyright (C) 2008 Free Software Foundation, Inc.
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/>. */
/* Written by Bruno Haible <address@hidden>, 2008. */
#include <config.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/select.h>
int
main (int argc, char *argv[])
{
if (argc == 3)
{
char mode = argv[1][0];
if (mode == 'r' || mode == 'w')
{
int fd = atoi (argv[2]);
if (fd >= 0)
{
fd_set fds;
struct timeval timeout;
int ret;
FD_ZERO (&fds);
FD_SET (fd, &fds);
timeout.tv_sec = 0;
timeout.tv_usec = 10000;
ret = (mode == 'r'
? select (fd + 1, &fds, NULL, NULL, &timeout)
: select (fd + 1, NULL, &fds, NULL, &timeout));
if (ret < 0)
{
perror ("select failed");
exit (1);
}
if ((ret == 0) != ! FD_ISSET (fd, &fds))
{
fprintf (stderr, "incorrect return value\n");
exit (1);
}
fprintf (stderr, "%d\n", ret);
exit (0);
}
}
}
fprintf (stderr, "Usage: test-select-fd mode fd\n");
exit (1);
}
======================= tests/test-select-in.sh ===========================
#!/bin/sh
# Test select() on file descriptors opened for reading.
tmpfiles=""
trap 'rm -fr $tmpfiles' 1 2 3 15
tmpfiles="$tmpfiles t-select-in.tmp"
# Regular files.
./test-select-fd${EXEEXT} r 0 < ./test-select-fd${EXEEXT} 2> t-select-in.tmp
test `cat t-select-in.tmp` = "1" || exit 1
# Pipes.
{ sleep 1; echo abc; } | ./test-select-fd${EXEEXT} r 0 2> t-select-in.tmp
test `cat t-select-in.tmp` = "0" || exit 1
echo abc | { sleep 1; ./test-select-fd${EXEEXT} r 0; } 2> t-select-in.tmp
test `cat t-select-in.tmp` = "1" || exit 1
# Special files.
./test-select-fd${EXEEXT} r 0 < /dev/null 2> t-select-in.tmp
test `cat t-select-in.tmp` = "1" || exit 1
rm -fr $tmpfiles
exit 0
======================= tests/test-select-out.sh ==========================
#!/bin/sh
# Test select() on file descriptors opened for writing.
tmpfiles=""
trap 'rm -fr $tmpfiles' 1 2 3 15
tmpfiles="$tmpfiles t-select-out.out t-select-out.tmp"
# Regular files.
./test-select-fd${EXEEXT} w 1 > t-select-out.out 2> t-select-out.tmp
test `cat t-select-out.tmp` = "1" || exit 1
# Pipes.
( { echo abc; ./test-select-fd${EXEEXT} w 1; } | { sleep 1; cat; } ) >
/dev/null 2> t-select-out.tmp
test `cat t-select-out.tmp` = "0" || exit 1
( { sleep 1; echo abc; ./test-select-fd${EXEEXT} w 1; } | cat) > /dev/null 2>
t-select-out.tmp
test `cat t-select-out.tmp` = "1" || exit 1
# Special files.
./test-select-fd${EXEEXT} w 1 > /dev/null 2> t-select-out.tmp
test `cat t-select-out.tmp` = "1" || exit 1
rm -fr $tmpfiles
exit 0
======================= tests/test-select-stdin.c =========================
/* Test of select() substitute, reading from stdin.
Copyright (C) 2008 Free Software Foundation, Inc.
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/>. */
/* Written by Bruno Haible <address@hidden>, 2008. */
#include <config.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/select.h>
#include <sys/time.h>
#include <unistd.h>
int
main ()
{
printf ("Applying select() from standard input. Press Ctrl-C to abort.\n");
for (;;)
{
struct timeval before;
struct timeval after;
unsigned long spent_usec;
fd_set readfds;
struct timeval timeout;
int ret;
gettimeofday (&before, NULL);
FD_ZERO (&readfds);
FD_SET (0, &readfds);
timeout.tv_sec = 0;
timeout.tv_usec = 500000;
ret = select (1, &readfds, NULL, NULL, &timeout);
gettimeofday (&after, NULL);
spent_usec = (after.tv_sec - before.tv_sec) * 1000000
+ after.tv_usec - before.tv_usec;
if (ret < 0)
{
perror ("select failed");
exit (1);
}
if ((ret == 0) != ! FD_ISSET (0, &readfds))
{
fprintf (stderr, "incorrect return value\n");
exit (1);
}
if (ret == 0)
{
if (spent_usec < 250000)
{
fprintf (stderr, "returned too early\n");
exit (1);
}
/* Timeout */
printf ("."); fflush (stdout);
}
else
{
char c;
printf ("Input available! Trying to read 1 byte...\n");
read (0, &c, 1);
}
}
}
===========================================================================
*** modules/select-tests.orig 2008-11-08 14:25:38.000000000 +0100
--- modules/select-tests 2008-11-08 14:25:30.000000000 +0100
***************
*** 1,5 ****
--- 1,9 ----
Files:
tests/test-select.c
+ tests/test-select-fd.c
+ tests/test-select-in.sh
+ tests/test-select-out.sh
+ tests/test-select-stdin.c
Depends-on:
stdbool
***************
*** 19,31 ****
accept
ioctl
close
configure.ac:
Makefile.am:
! TESTS += test-select
! check_PROGRAMS += test-select
test_select_LDADD = $(LDADD) @LIBSOCKET@
License:
LGPL
--- 23,40 ----
accept
ioctl
close
+ gettimeofday
configure.ac:
Makefile.am:
! TESTS += test-select test-select-in.sh test-select-out.sh
! # test-select-stdin has to be run by hand.
! TESTS_ENVIRONMENT += EXEEXT='@EXEEXT@'
! check_PROGRAMS += test-select test-select-fd test-select-stdin
test_select_LDADD = $(LDADD) @LIBSOCKET@
+ test_select_fd_LDADD = $(LDADD) @LIBSOCKET@
+ test_select_stdin_LDADD = $(LDADD) @LIBSOCKET@
License:
LGPL
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