* files for more information.
*/
+#include "sbcl.h"
+
+#ifndef LISP_FEATURE_WIN32
+
#include <stdlib.h>
#include <sys/file.h>
#include <sys/types.h>
+#include <signal.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <sys/ioctl.h>
#include <unistd.h>
-
+#include <sys/wait.h>
#include <sys/ioctl.h>
#include <termios.h>
+#include <errno.h>
+#ifdef LISP_FEATURE_OPENBSD
+/* FIXME: there has to be a better way to avoid ./util.h here */
+#include </usr/include/util.h>
+#endif
/* borrowed from detachtty's detachtty.c, in turn borrowed from APUE
* example code found at
return 1;
}
-int spawn(char *program, char *argv[], char *envp[], char *pty_name,
- int stdin, int stdout, int stderr)
+#if defined(LISP_FEATURE_OPENBSD)
+
+int
+set_pty(char *pty_name)
+{
+ int fd;
+
+ if ((fd = open(pty_name, O_RDWR, 0)) == -1 ||
+ login_tty(fd) == -1)
+ return (0);
+ return (set_noecho(STDIN_FILENO));
+}
+
+#else /* !LISP_FEATURE_OPENBSD */
+
+int
+set_pty(char *pty_name)
+{
+ int fd;
+
+#if !defined(LISP_FEATURE_HPUX) && !defined(SVR4)
+ fd = open("/dev/tty", O_RDWR, 0);
+ if (fd >= 0) {
+ ioctl(fd, TIOCNOTTY, 0);
+ close(fd);
+ }
+#endif
+ if ((fd = open(pty_name, O_RDWR, 0)) == -1)
+ return (-1);
+ dup2(fd, 0);
+ set_noecho(0);
+ dup2(fd, 1);
+ dup2(fd, 2);
+ close(fd);
+ return (0);
+}
+
+#endif /* !LISP_FEATURE_OPENBSD */
+
+extern char **environ;
+int spawn(char *program, char *argv[], int sin, int sout, int serr,
+ int search, char *envp[], char *pty_name, int wait, char *pwd)
{
- int pid = fork();
+ pid_t pid;
int fd;
+ int channel[2];
+ sigset_t sset;
+ int failure_code = 2;
- if (pid != 0)
+ channel[0] = -1;
+ channel[1] = -1;
+ if (!pipe(channel)) {
+ if (-1==fcntl(channel[1], F_SETFD, FD_CLOEXEC)) {
+ close(channel[1]);
+ channel[1] = -1;
+ }
+ }
+
+ pid = fork();
+ if (pid) {
+ if ((-1 != pid) && (-1 != channel[1])) {
+ int child_errno = 0;
+ int bytes = sizeof(int);
+ int n;
+ char *p = (char*)&child_errno;
+ close(channel[1]);
+ /* Try to read child errno from channel. */
+ while ((bytes > 0) &&
+ (n = read(channel[0], p, bytes))) {
+ if (-1 == n) {
+ if (EINTR == errno) {
+ continue;
+ } else {
+ break;
+ }
+ } else {
+ bytes -= n;
+ p += n;
+ }
+ }
+ close(channel[0]);
+ if (child_errno) {
+ int status;
+ waitpid(pid, &status, 0);
+ /* Our convention to tell Lisp that it was the exec or
+ chdir that failed, not the fork. */
+ /* FIXME: there are other values waitpid(2) can return. */
+ if (WIFEXITED(status)) {
+ pid = -WEXITSTATUS(status);
+ }
+ errno = child_errno;
+ }
+ }
return pid;
+ }
+ close (channel[0]);
- /* Put us in our own process group. */
-#if defined(hpux)
- setsid();
+ /* Put us in our own process group, but only if we need not
+ * share stdin with our parent. In the latter case we claim
+ * control of the terminal. */
+ if (sin >= 0) {
+#if defined(LISP_FEATURE_HPUX) || defined(LISP_FEATURE_OPENBSD)
+ setsid();
+#elif defined(LISP_FEATURE_DARWIN)
+ setpgid(0, getpid());
#elif defined(SVR4) || defined(__linux__) || defined(__osf__)
- setpgrp();
+ setpgrp();
#else
- setpgrp(0, getpid());
+ setpgrp(0, getpid());
#endif
+ } else {
+ tcsetpgrp(0, getpgrp());
+ }
+
+ /* unblock signals */
+ sigemptyset(&sset);
+ sigprocmask(SIG_SETMASK, &sset, NULL);
/* If we are supposed to be part of some other pty, go for it. */
- if (pty_name) {
-#if !defined(hpux) && !defined(SVR4)
- fd = open("/dev/tty", O_RDWR, 0);
- if (fd >= 0) {
- ioctl(fd, TIOCNOTTY, 0);
- close(fd);
- }
-#endif
- fd = open(pty_name, O_RDWR, 0);
- dup2(fd, 0);
- set_noecho(0);
- dup2(fd, 1);
- dup2(fd, 2);
- close(fd);
- } else{
+ if (pty_name)
+ set_pty(pty_name);
+ else {
/* Set up stdin, stdout, and stderr */
- if (stdin >= 0)
- dup2(stdin, 0);
- if (stdout >= 0)
- dup2(stdout, 1);
- if (stderr >= 0)
- dup2(stderr, 2);
+ if (sin >= 0)
+ dup2(sin, 0);
+ if (sout >= 0)
+ dup2(sout, 1);
+ if (serr >= 0)
+ dup2(serr, 2);
}
/* Close all other fds. */
#ifdef SVR4
for (fd = sysconf(_SC_OPEN_MAX)-1; fd >= 3; fd--)
- close(fd);
+ if (fd != channel[1]) close(fd);
#else
for (fd = getdtablesize()-1; fd >= 3; fd--)
- close(fd);
+ if (fd != channel[1]) close(fd);
#endif
- /* Exec the program. */
- execve(program, argv, envp);
+ if (pwd && chdir(pwd) < 0) {
+ failure_code = 3;
+ } else {
+ if (envp) {
+ environ = envp;
+ }
+ /* Exec the program. */
+ if (search)
+ execvp(program, argv);
+ else
+ execv(program, argv);
+ }
+
+ /* When exec or chdir fails and channel is available, send the errno value. */
+ if (-1 != channel[1]) {
+ int our_errno = errno;
+ int bytes = sizeof(int);
+ int n;
+ char *p = (char*)&our_errno;
+ while ((bytes > 0) &&
+ (n = write(channel[1], p, bytes))) {
+ if (-1 == n) {
+ if (EINTR == errno) {
+ continue;
+ } else {
+ break;
+ }
+ } else {
+ bytes -= n;
+ p += n;
+ }
+ }
+ close(channel[1]);
+ }
+ _exit(failure_code);
+}
+#else /* !LISP_FEATURE_WIN32 */
+
+# include <windows.h>
+# include <process.h>
+# include <stdio.h>
+# include <stdlib.h>
+# include <fcntl.h>
+# include <io.h>
+
+#define READ_HANDLE 0
+#define WRITE_HANDLE 1
- /* It didn't work, so try /bin/sh. */
- argv[0] = program;
- argv[-1] = "sh";
- execve("/bin/sh", argv-1, envp);
+/* These functions do not attempt to deal with wchar_t variations. */
- /* The exec didn't work, flame out. */
- exit(1);
+/* Get the value of _environ maintained by MSVCRT */
+char **msvcrt_environ ( void ) {
+ return ( _environ );
}
+
+/* Set up in, out, err pipes and spawn a program, waiting or otherwise. */
+HANDLE spawn (
+ const char *program,
+ const char *const *argv,
+ int in,
+ int out,
+ int err,
+ int search,
+ char *envp,
+ char *ptyname,
+ int wait,
+ char *pwd
+ )
+{
+ int stdout_backup, stdin_backup, stderr_backup, wait_mode;
+ HANDLE hProcess;
+ HANDLE hReturn;
+
+ /* Duplicate and save the original stdin/out/err handles. */
+ stdout_backup = _dup ( _fileno ( stdout ) );
+ stdin_backup = _dup ( _fileno ( stdin ) );
+ stderr_backup = _dup ( _fileno ( stderr ) );
+
+ /* If we are not using stdin/out/err
+ * then duplicate the new pipes to current stdin/out/err handles.
+ *
+ * Default std fds are used if in, out or err parameters
+ * are -1. */
+
+ hReturn = (HANDLE)-1;
+ hProcess = (HANDLE)-1;
+ if ( ( out >= 0 ) && ( out != _fileno ( stdout ) ) ) {
+ if ( _dup2 ( out, _fileno ( stdout ) ) != 0 ) goto error_exit;
+ }
+ if ( ( in >= 0 ) && ( in != _fileno ( stdin ) ) ) {
+ if ( _dup2 ( in, _fileno ( stdin ) ) != 0 ) goto error_exit_out;
+ }
+ if ( ( err >= 0 ) && ( err != _fileno ( stderr ) ) ) {
+ if ( _dup2 ( err, _fileno ( stderr ) ) != 0 ) goto error_exit_in;
+ }
+
+ /* Set the wait mode. */
+ if ( 0 == wait ) {
+ wait_mode = P_NOWAIT;
+ } else {
+ wait_mode = P_WAIT;
+ }
+
+ /* Change working directory if supplied. */
+ if (pwd) {
+ if (chdir(pwd) < 0) {
+ goto error_exit;
+ }
+ }
+
+ /* Spawn process given on the command line*/
+ if (search)
+ hProcess = (HANDLE) spawnvp ( wait_mode, program, (char* const* )argv );
+ else
+ hProcess = (HANDLE) spawnv ( wait_mode, program, (char* const* )argv );
+
+ /* Now that the process is launched, replace the original
+ * in/out/err handles and close the backups. */
+
+ if ( _dup2 ( stderr_backup, _fileno ( stderr ) ) != 0 ) goto error_exit;
+ error_exit_in:
+ if ( _dup2 ( stdin_backup, _fileno ( stdin ) ) != 0 ) goto error_exit;
+ error_exit_out:
+ if ( _dup2 ( stdout_backup, _fileno ( stdout ) ) != 0 ) goto error_exit;
+
+ hReturn = hProcess;
+
+ error_exit:
+ close ( stdout_backup );
+ close ( stdin_backup );
+ close ( stderr_backup );
+
+ return hReturn;
+
+}
+
+
+#endif /* !LISP_FEATURE_WIN32 */
projects / sbcl.git / blobdiff