#include <sys/types.h>
#include <sys/wait.h>
#include <sys/ioctl.h>
+#include <errno.h>
#include "putty.h"
#endif
int pty_master_fd;
+static void *pty_frontend;
static char pty_name[FILENAME_MAX];
static int pty_stamped_utmp = 0;
static int pty_child_pid;
static int pty_utmp_helper_pid, pty_utmp_helper_pipe;
static int pty_term_width, pty_term_height;
-static sig_atomic_t pty_child_dead;
-static int pty_exit_code;
+static volatile sig_atomic_t pty_child_dead;
+static volatile int pty_exit_code;
#ifndef OMIT_UTMP
static struct utmp utmp_entry;
#endif
static void sigchld_handler(int signum)
{
+ int save_errno = errno;
pid_t pid;
int status;
- pid = waitpid(-1, &status, WNOHANG);
- if (pid == pty_child_pid && (WIFEXITED(status) || WIFSIGNALED(status))) {
- pty_exit_code = status;
- pty_child_dead = TRUE;
- }
+
+ do {
+ pid = waitpid(-1, &status, WNOHANG);
+ if (pid == pty_child_pid && (WIFEXITED(status) || WIFSIGNALED(status))) {
+ pty_exit_code = status;
+ pty_child_dead = TRUE;
+ }
+ } while(pid > 0);
+ errno = save_errno;
}
static void fatal_sig_handler(int signum)
{
- signal(signum, SIG_DFL);
+ putty_signal(signum, SIG_DFL);
cleanup_utmp();
setuid(getuid());
raise(signum);
pid_t pid;
int pipefd[2];
+ /* set the child signal handler straight away; it needs to be set
+ * before we ever fork. */
+ putty_signal(SIGCHLD, sigchld_handler);
pty_master_fd = -1;
if (geteuid() != getuid() || getegid() != getgid()) {
ret = read(pipefd[0], buffer, lenof(buffer));
if (ret <= 0) {
cleanup_utmp();
- exit(0);
+ _exit(0);
} else if (!pty_stamped_utmp) {
if (dlen < lenof(display))
memcpy(display+dlen, buffer,
* unfortunately unprotected against SIGKILL,
* but that's life.
*/
- signal(SIGHUP, fatal_sig_handler);
- signal(SIGINT, fatal_sig_handler);
- signal(SIGQUIT, fatal_sig_handler);
- signal(SIGILL, fatal_sig_handler);
- signal(SIGABRT, fatal_sig_handler);
- signal(SIGFPE, fatal_sig_handler);
- signal(SIGPIPE, fatal_sig_handler);
- signal(SIGALRM, fatal_sig_handler);
- signal(SIGTERM, fatal_sig_handler);
- signal(SIGSEGV, fatal_sig_handler);
- signal(SIGUSR1, fatal_sig_handler);
- signal(SIGUSR2, fatal_sig_handler);
+ putty_signal(SIGHUP, fatal_sig_handler);
+ putty_signal(SIGINT, fatal_sig_handler);
+ putty_signal(SIGQUIT, fatal_sig_handler);
+ putty_signal(SIGILL, fatal_sig_handler);
+ putty_signal(SIGABRT, fatal_sig_handler);
+ putty_signal(SIGFPE, fatal_sig_handler);
+ putty_signal(SIGPIPE, fatal_sig_handler);
+ putty_signal(SIGALRM, fatal_sig_handler);
+ putty_signal(SIGTERM, fatal_sig_handler);
+ putty_signal(SIGSEGV, fatal_sig_handler);
+ putty_signal(SIGUSR1, fatal_sig_handler);
+ putty_signal(SIGUSR2, fatal_sig_handler);
#ifdef SIGBUS
- signal(SIGBUS, fatal_sig_handler);
+ putty_signal(SIGBUS, fatal_sig_handler);
#endif
#ifdef SIGPOLL
- signal(SIGPOLL, fatal_sig_handler);
+ putty_signal(SIGPOLL, fatal_sig_handler);
#endif
#ifdef SIGPROF
- signal(SIGPROF, fatal_sig_handler);
+ putty_signal(SIGPROF, fatal_sig_handler);
#endif
#ifdef SIGSYS
- signal(SIGSYS, fatal_sig_handler);
+ putty_signal(SIGSYS, fatal_sig_handler);
#endif
#ifdef SIGTRAP
- signal(SIGTRAP, fatal_sig_handler);
+ putty_signal(SIGTRAP, fatal_sig_handler);
#endif
#ifdef SIGVTALRM
- signal(SIGVTALRM, fatal_sig_handler);
+ putty_signal(SIGVTALRM, fatal_sig_handler);
#endif
#ifdef SIGXCPU
- signal(SIGXCPU, fatal_sig_handler);
+ putty_signal(SIGXCPU, fatal_sig_handler);
#endif
#ifdef SIGXFSZ
- signal(SIGXFSZ, fatal_sig_handler);
+ putty_signal(SIGXFSZ, fatal_sig_handler);
#endif
#ifdef SIGIO
- signal(SIGIO, fatal_sig_handler);
+ putty_signal(SIGIO, fatal_sig_handler);
#endif
- /* Also clean up utmp on normal exit. */
- atexit(cleanup_utmp);
setup_utmp(pty_name, display);
}
}
close(pipefd[0]);
pty_utmp_helper_pid = pid;
pty_utmp_helper_pipe = pipefd[1];
- signal(SIGCHLD, sigchld_handler);
}
#endif
int slavefd;
pid_t pid, pgrp;
+ pty_frontend = frontend;
*backend_handle = NULL; /* we can't sensibly use this, sadly */
pty_term_width = cfg.width;
if (!cfg.stamp_utmp)
close(pty_utmp_helper_pipe); /* just let the child process die */
else {
- char *location = get_x_display();
+ char *location = get_x_display(pty_frontend);
int len = strlen(location)+1, pos = 0; /* +1 to include NUL */
while (pos < len) {
int ret = write(pty_utmp_helper_pipe, location+pos, len - pos);
slavefd = open(pty_name, O_RDWR);
if (slavefd < 0) {
perror("slave pty: open");
- exit(1);
+ _exit(1);
}
close(pty_master_fd);
* parent, particularly by things like sh -c 'pterm &' and
* some window managers. Reverse this for our child process.
*/
- signal(SIGINT, SIG_DFL);
- signal(SIGQUIT, SIG_DFL);
+ putty_signal(SIGINT, SIG_DFL);
+ putty_signal(SIGQUIT, SIG_DFL);
if (pty_argv)
execvp(pty_argv[0], pty_argv);
else {
* If we're here, exec has gone badly foom.
*/
perror("exec");
- exit(127);
+ _exit(127);
} else {
- close(slavefd);
pty_child_pid = pid;
pty_child_dead = FALSE;
- signal(SIGCHLD, sigchld_handler);
- }
+ }
return NULL;
}
size.ws_row = (unsigned short)pty_term_height;
size.ws_col = (unsigned short)pty_term_width;
- size.ws_xpixel = (unsigned short) pty_term_width * font_dimension(0);
- size.ws_ypixel = (unsigned short) pty_term_height * font_dimension(1);
+ size.ws_xpixel = (unsigned short) pty_term_width *
+ font_dimension(pty_frontend, 0);
+ size.ws_ypixel = (unsigned short) pty_term_height *
+ font_dimension(pty_frontend, 1);
ioctl(pty_master_fd, TIOCSWINSZ, (void *)&size);
return;
}
return 0; /* neither editing nor echoing */
}
+static void pty_provide_ldisc(void *handle, void *ldisc)
+{
+ /* This is a stub. */
+}
+
+static void pty_provide_logctx(void *handle, void *logctx)
+{
+ /* This is a stub. */
+}
+
static int pty_exitcode(void *handle)
{
if (!pty_child_dead)
pty_exitcode,
pty_sendok,
pty_ldisc,
+ pty_provide_ldisc,
+ pty_provide_logctx,
pty_unthrottle,
1
};
projects / u / mdw / putty / blobdiff