57718be8fa
minus the vendor Makefiles Provide directions for how to bootstrap the vendor sources in FREEBSD-upgrade MFC after 2 weeks Discussed with: rpaulo Sponsored by: EMC / Isilon Storage Division
352 lines
6.8 KiB
C
352 lines
6.8 KiB
C
/* $Id: t_pty.c,v 1.1 2011/09/24 15:53:01 christos Exp $ */
|
|
|
|
/*
|
|
* Allocates a pty(4) device, and sends the specified number of packets of the
|
|
* specified length though it, while a child reader process reads and reports
|
|
* results.
|
|
*
|
|
* Written by Matthew Mondor
|
|
*/
|
|
|
|
#include <sys/cdefs.h>
|
|
__RCSID("$NetBSD: t_pty.c,v 1.1 2011/09/24 15:53:01 christos Exp $");
|
|
|
|
#include <errno.h>
|
|
#include <err.h>
|
|
#include <fcntl.h>
|
|
#include <poll.h>
|
|
#include <stdio.h>
|
|
#ifdef __linux__
|
|
#define _XOPEN_SOURCE
|
|
#define __USE_XOPEN
|
|
#endif
|
|
#include <stdint.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <termios.h>
|
|
#include <unistd.h>
|
|
|
|
#include <sys/ioctl.h>
|
|
#include <sys/types.h>
|
|
#include <sys/wait.h>
|
|
|
|
#ifdef STANDALONE
|
|
static __dead void usage(const char *);
|
|
static void parse_args(int, char **);
|
|
#else
|
|
#include <atf-c.h>
|
|
#include "../h_macros.h"
|
|
#endif
|
|
|
|
static int pty_open(void);
|
|
static int tty_open(const char *);
|
|
static void fd_nonblock(int);
|
|
static pid_t child_spawn(const char *);
|
|
static void run(void);
|
|
|
|
static size_t buffer_size = 4096;
|
|
static size_t packets = 2;
|
|
static uint8_t *dbuf;
|
|
static int verbose;
|
|
static int qsize;
|
|
|
|
|
|
static
|
|
void run(void)
|
|
{
|
|
size_t i;
|
|
int pty;
|
|
int status;
|
|
pid_t child;
|
|
if ((dbuf = calloc(1, buffer_size)) == NULL)
|
|
err(EXIT_FAILURE, "malloc(%zu)", buffer_size);
|
|
|
|
if (verbose)
|
|
(void)printf(
|
|
"parent: started; opening PTY and spawning child\n");
|
|
pty = pty_open();
|
|
child = child_spawn(ptsname(pty));
|
|
if (verbose)
|
|
(void)printf("parent: sleeping to make sure child is ready\n");
|
|
(void)sleep(1);
|
|
|
|
for (i = 0; i < buffer_size; i++)
|
|
dbuf[i] = i & 0xff;
|
|
|
|
if (verbose)
|
|
(void)printf("parent: writing\n");
|
|
|
|
for (i = 0; i < packets; i++) {
|
|
ssize_t size;
|
|
|
|
if (verbose)
|
|
(void)printf(
|
|
"parent: attempting to write %zu bytes to PTY\n",
|
|
buffer_size);
|
|
if ((size = write(pty, dbuf, buffer_size)) == -1) {
|
|
err(EXIT_FAILURE, "parent: write()");
|
|
break;
|
|
}
|
|
if (verbose)
|
|
(void)printf("parent: wrote %zd bytes to PTY\n", size);
|
|
}
|
|
|
|
if (verbose)
|
|
(void)printf("parent: waiting for child to exit\n");
|
|
if (waitpid(child, &status, 0) == -1)
|
|
err(EXIT_FAILURE, "waitpid");
|
|
if (!WIFEXITED(status) || WEXITSTATUS(status) != 0)
|
|
errx(EXIT_FAILURE, "child failed");
|
|
|
|
if (verbose)
|
|
(void)printf("parent: closing PTY\n");
|
|
(void)close(pty);
|
|
if (verbose)
|
|
(void)printf("parent: exiting\n");
|
|
}
|
|
|
|
static void
|
|
condition(int fd)
|
|
{
|
|
struct termios tios;
|
|
|
|
if (qsize) {
|
|
int opt = qsize;
|
|
if (ioctl(fd, TIOCSQSIZE, &opt) == -1)
|
|
err(EXIT_FAILURE, "Couldn't set tty(4) buffer size");
|
|
if (ioctl(fd, TIOCGQSIZE, &opt) == -1)
|
|
err(EXIT_FAILURE, "Couldn't get tty(4) buffer size");
|
|
if (opt != qsize)
|
|
errx(EXIT_FAILURE, "Wrong qsize %d != %d\n",
|
|
qsize, opt);
|
|
}
|
|
if (tcgetattr(fd, &tios) == -1)
|
|
err(EXIT_FAILURE, "tcgetattr()");
|
|
cfmakeraw(&tios);
|
|
cfsetspeed(&tios, B921600);
|
|
if (tcsetattr(fd, TCSANOW, &tios) == -1)
|
|
err(EXIT_FAILURE, "tcsetattr()");
|
|
}
|
|
|
|
static int
|
|
pty_open(void)
|
|
{
|
|
int fd;
|
|
|
|
if ((fd = posix_openpt(O_RDWR)) == -1)
|
|
err(EXIT_FAILURE, "Couldn't pty(4) device");
|
|
condition(fd);
|
|
if (grantpt(fd) == -1)
|
|
err(EXIT_FAILURE,
|
|
"Couldn't grant permissions on tty(4) device");
|
|
|
|
|
|
condition(fd);
|
|
|
|
if (unlockpt(fd) == -1)
|
|
err(EXIT_FAILURE, "unlockpt()");
|
|
|
|
return fd;
|
|
}
|
|
|
|
static int
|
|
tty_open(const char *ttydev)
|
|
{
|
|
int fd;
|
|
|
|
if ((fd = open(ttydev, O_RDWR, 0)) == -1)
|
|
err(EXIT_FAILURE, "Couldn't open tty(4) device");
|
|
|
|
#ifdef USE_PPP_DISCIPLINE
|
|
{
|
|
int opt = PPPDISC;
|
|
if (ioctl(fd, TIOCSETD, &opt) == -1)
|
|
err(EXIT_FAILURE,
|
|
"Couldn't set tty(4) discipline to PPP");
|
|
}
|
|
#endif
|
|
|
|
condition(fd);
|
|
|
|
return fd;
|
|
}
|
|
|
|
static void
|
|
fd_nonblock(int fd)
|
|
{
|
|
int opt;
|
|
|
|
if ((opt = fcntl(fd, F_GETFL, NULL)) == -1)
|
|
err(EXIT_FAILURE, "fcntl()");
|
|
if (fcntl(fd, F_SETFL, opt | O_NONBLOCK) == -1)
|
|
err(EXIT_FAILURE, "fcntl()");
|
|
}
|
|
|
|
static pid_t
|
|
child_spawn(const char *ttydev)
|
|
{
|
|
pid_t pid;
|
|
int tty;
|
|
struct pollfd pfd;
|
|
size_t total = 0;
|
|
|
|
if ((pid = fork()) == -1)
|
|
err(EXIT_FAILURE, "fork()");
|
|
(void)setsid();
|
|
if (pid != 0)
|
|
return pid;
|
|
|
|
if (verbose)
|
|
(void)printf("child: started; open \"%s\"\n", ttydev);
|
|
tty = tty_open(ttydev);
|
|
fd_nonblock(tty);
|
|
|
|
if (verbose)
|
|
(void)printf("child: TTY open, starting read loop\n");
|
|
pfd.fd = tty;
|
|
pfd.events = POLLIN;
|
|
pfd.revents = 0;
|
|
for (;;) {
|
|
int ret;
|
|
ssize_t size;
|
|
|
|
if (verbose)
|
|
(void)printf("child: polling\n");
|
|
if ((ret = poll(&pfd, 1, 2000)) == -1)
|
|
err(EXIT_FAILURE, "child: poll()");
|
|
if (ret == 0)
|
|
break;
|
|
if ((pfd.revents & POLLERR) != 0)
|
|
break;
|
|
if ((pfd.revents & POLLIN) != 0) {
|
|
for (;;) {
|
|
if (verbose)
|
|
(void)printf(
|
|
"child: attempting to read %zu"
|
|
" bytes\n", buffer_size);
|
|
if ((size = read(tty, dbuf, buffer_size))
|
|
== -1) {
|
|
if (errno == EAGAIN)
|
|
break;
|
|
err(EXIT_FAILURE, "child: read()");
|
|
}
|
|
if (qsize && size < qsize &&
|
|
(size_t)size < buffer_size)
|
|
errx(EXIT_FAILURE, "read returned %zd "
|
|
"less than the queue size %d",
|
|
size, qsize);
|
|
if (verbose)
|
|
(void)printf(
|
|
"child: read %zd bytes from TTY\n",
|
|
size);
|
|
if (size == 0)
|
|
goto end;
|
|
total += size;
|
|
}
|
|
}
|
|
}
|
|
end:
|
|
if (verbose)
|
|
(void)printf("child: closing TTY %zu\n", total);
|
|
(void)close(tty);
|
|
if (verbose)
|
|
(void)printf("child: exiting\n");
|
|
if (total != buffer_size * packets)
|
|
errx(EXIT_FAILURE,
|
|
"Lost data %zu != %zu\n", total, buffer_size * packets);
|
|
|
|
exit(EXIT_SUCCESS);
|
|
}
|
|
|
|
#ifdef STANDALONE
|
|
static void
|
|
usage(const char *msg)
|
|
{
|
|
|
|
if (msg != NULL)
|
|
(void) fprintf(stderr, "\n%s\n\n", msg);
|
|
|
|
(void)fprintf(stderr,
|
|
"Usage: %s [-v] [-q <qsize>] [-s <packetsize>] [-n <packets>]\n",
|
|
getprogname());
|
|
|
|
exit(EXIT_FAILURE);
|
|
}
|
|
|
|
static void
|
|
parse_args(int argc, char **argv)
|
|
{
|
|
int ch;
|
|
|
|
while ((ch = getopt(argc, argv, "n:q:s:v")) != -1) {
|
|
switch (ch) {
|
|
case 'n':
|
|
packets = (size_t)atoi(optarg);
|
|
break;
|
|
case 'q':
|
|
qsize = atoi(optarg);
|
|
break;
|
|
case 's':
|
|
buffer_size = (size_t)atoi(optarg);
|
|
break;
|
|
case 'v':
|
|
verbose++;
|
|
break;
|
|
default:
|
|
usage(NULL);
|
|
break;
|
|
}
|
|
}
|
|
if (buffer_size < 0 || buffer_size > 65536)
|
|
usage("-s must be between 0 and 65536");
|
|
if (packets < 1 || packets > 100)
|
|
usage("-p must be between 1 and 100");
|
|
}
|
|
|
|
int
|
|
main(int argc, char **argv)
|
|
{
|
|
|
|
parse_args(argc, argv);
|
|
run();
|
|
exit(EXIT_SUCCESS);
|
|
}
|
|
|
|
#else
|
|
ATF_TC(pty_no_queue);
|
|
|
|
ATF_TC_HEAD(pty_no_queue, tc)
|
|
{
|
|
atf_tc_set_md_var(tc, "descr", "Checks that writing to pty "
|
|
"does not lose data with the default queue size of 1024");
|
|
}
|
|
|
|
ATF_TC_BODY(pty_no_queue, tc)
|
|
{
|
|
qsize = 0;
|
|
run();
|
|
}
|
|
|
|
ATF_TC(pty_queue);
|
|
|
|
ATF_TC_HEAD(pty_queue, tc)
|
|
{
|
|
atf_tc_set_md_var(tc, "descr", "Checks that writing to pty "
|
|
"does not lose data with the a queue size of 4096");
|
|
}
|
|
|
|
ATF_TC_BODY(pty_queue, tc)
|
|
{
|
|
qsize = 4096;
|
|
run();
|
|
}
|
|
|
|
ATF_TP_ADD_TCS(tp)
|
|
{
|
|
ATF_TP_ADD_TC(tp, pty_no_queue);
|
|
ATF_TP_ADD_TC(tp, pty_queue);
|
|
|
|
return atf_no_error();
|
|
}
|
|
#endif
|