/*
-
-pty.c
-
-Author: Tatu Ylonen <ylo@cs.hut.fi>
-
-Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
- All rights reserved
-
-Created: Fri Mar 17 04:37:25 1995 ylo
-
-Allocating a pseudo-terminal, and making it the controlling tty.
-
-*/
+ *
+ * pty.c
+ *
+ * Author: Tatu Ylonen <ylo@cs.hut.fi>
+ *
+ * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
+ * All rights reserved
+ *
+ * Created: Fri Mar 17 04:37:25 1995 ylo
+ *
+ * Allocating a pseudo-terminal, and making it the controlling tty.
+ *
+ */
#include "includes.h"
RCSID("$Id$");
+#include "pty.h"
+#include "ssh.h"
+
#ifdef HAVE_PTY_H
#include <pty.h>
#endif /* HAVE_PTY_H */
-#include "pty.h"
-#include "ssh.h"
-
/* Pty allocated with _getpty gets broken if we do I_PUSH:es to it. */
#if defined(HAVE__GETPTY) || defined(HAVE_OPENPTY)
#undef HAVE_DEV_PTMX
/* Allocates and opens a pty. Returns 0 if no pty could be allocated,
or nonzero if a pty was successfully allocated. On success, open file
- descriptors for the pty and tty sides and the name of the tty side are
+ descriptors for the pty and tty sides and the name of the tty side are
returned (the buffer must be able to hold at least 64 characters). */
-int pty_allocate(int *ptyfd, int *ttyfd, char *namebuf)
+int
+pty_allocate(int *ptyfd, int *ttyfd, char *namebuf)
{
#ifdef HAVE_OPENPTY
+ /* openpty(3) exists in OSF/1 and some other os'es */
+ int i;
- /* openpty(3) exists in OSF/1 and some other os'es */
-
- int i;
-
- i = openpty(ptyfd, ttyfd, namebuf, NULL, NULL);
-
- if (i < 0)
- {
- error("openpty: %.100s", strerror(errno));
- return 0;
- }
-
- return 1;
-
+ i = openpty(ptyfd, ttyfd, namebuf, NULL, NULL);
+ if (i < 0) {
+ error("openpty: %.100s", strerror(errno));
+ return 0;
+ }
+ return 1;
#else /* HAVE_OPENPTY */
#ifdef HAVE__GETPTY
-
- /* _getpty(3) exists in SGI Irix 4.x, 5.x & 6.x -- it generates more
- pty's automagically when needed */
-
- char *slave;
-
- slave = _getpty(ptyfd, O_RDWR, 0622, 0);
- if (slave == NULL)
- {
- error("_getpty: %.100s", strerror(errno));
- return 0;
- }
- strcpy(namebuf, slave);
- /* Open the slave side. */
- *ttyfd = open(namebuf, O_RDWR|O_NOCTTY);
- if (*ttyfd < 0)
- {
- error("%.200s: %.100s", namebuf, strerror(errno));
- close(*ptyfd);
- return 0;
- }
- return 1;
-
+ /* _getpty(3) exists in SGI Irix 4.x, 5.x & 6.x -- it generates
+ more pty's automagically when needed */
+ char *slave;
+
+ slave = _getpty(ptyfd, O_RDWR, 0622, 0);
+ if (slave == NULL) {
+ error("_getpty: %.100s", strerror(errno));
+ return 0;
+ }
+ strcpy(namebuf, slave);
+ /* Open the slave side. */
+ *ttyfd = open(namebuf, O_RDWR | O_NOCTTY);
+ if (*ttyfd < 0) {
+ error("%.200s: %.100s", namebuf, strerror(errno));
+ close(*ptyfd);
+ return 0;
+ }
+ return 1;
#else /* HAVE__GETPTY */
#ifdef HAVE_DEV_PTMX
- /* This code is used e.g. on Solaris 2.x. (Note that Solaris 2.3 also has
- bsd-style ptys, but they simply do not work.) */
-
- int ptm;
- char *pts;
-
- ptm = open("/dev/ptmx", O_RDWR|O_NOCTTY);
- if (ptm < 0)
- {
- error("/dev/ptmx: %.100s", strerror(errno));
- return 0;
- }
- if (grantpt(ptm) < 0)
- {
- error("grantpt: %.100s", strerror(errno));
- return 0;
- }
- if (unlockpt(ptm) < 0)
- {
- error("unlockpt: %.100s", strerror(errno));
- return 0;
- }
- pts = ptsname(ptm);
- if (pts == NULL)
- error("Slave pty side name could not be obtained.");
- strcpy(namebuf, pts);
- *ptyfd = ptm;
-
- /* Open the slave side. */
- *ttyfd = open(namebuf, O_RDWR|O_NOCTTY);
- if (*ttyfd < 0)
- {
- error("%.100s: %.100s", namebuf, strerror(errno));
- close(*ptyfd);
- return 0;
- }
- /* Push the appropriate streams modules, as described in Solaris pts(7). */
- if (ioctl(*ttyfd, I_PUSH, "ptem") < 0)
- error("ioctl I_PUSH ptem: %.100s", strerror(errno));
- if (ioctl(*ttyfd, I_PUSH, "ldterm") < 0)
- error("ioctl I_PUSH ldterm: %.100s", strerror(errno));
- if (ioctl(*ttyfd, I_PUSH, "ttcompat") < 0)
- error("ioctl I_PUSH ttcompat: %.100s", strerror(errno));
- return 1;
-
+ /* This code is used e.g. on Solaris 2.x. (Note that Solaris 2.3
+ also has bsd-style ptys, but they simply do not work.) */
+ int ptm;
+ char *pts;
+
+ ptm = open("/dev/ptmx", O_RDWR | O_NOCTTY);
+ if (ptm < 0) {
+ error("/dev/ptmx: %.100s", strerror(errno));
+ return 0;
+ }
+ if (grantpt(ptm) < 0) {
+ error("grantpt: %.100s", strerror(errno));
+ return 0;
+ }
+ if (unlockpt(ptm) < 0) {
+ error("unlockpt: %.100s", strerror(errno));
+ return 0;
+ }
+ pts = ptsname(ptm);
+ if (pts == NULL)
+ error("Slave pty side name could not be obtained.");
+ strcpy(namebuf, pts);
+ *ptyfd = ptm;
+
+ /* Open the slave side. */
+ *ttyfd = open(namebuf, O_RDWR | O_NOCTTY);
+ if (*ttyfd < 0) {
+ error("%.100s: %.100s", namebuf, strerror(errno));
+ close(*ptyfd);
+ return 0;
+ }
+ /* Push the appropriate streams modules, as described in Solaris
+ pts(7). */
+ if (ioctl(*ttyfd, I_PUSH, "ptem") < 0)
+ error("ioctl I_PUSH ptem: %.100s", strerror(errno));
+ if (ioctl(*ttyfd, I_PUSH, "ldterm") < 0)
+ error("ioctl I_PUSH ldterm: %.100s", strerror(errno));
+ if (ioctl(*ttyfd, I_PUSH, "ttcompat") < 0)
+ error("ioctl I_PUSH ttcompat: %.100s", strerror(errno));
+ return 1;
#else /* HAVE_DEV_PTMX */
#ifdef HAVE_DEV_PTS_AND_PTC
+ /* AIX-style pty code. */
+ const char *name;
- /* AIX-style pty code. */
-
- const char *name;
-
- *ptyfd = open("/dev/ptc", O_RDWR|O_NOCTTY);
- if (*ptyfd < 0)
- {
- error("Could not open /dev/ptc: %.100s", strerror(errno));
- return 0;
- }
- name = ttyname(*ptyfd);
- if (!name)
- fatal("Open of /dev/ptc returns device for which ttyname fails.");
- strcpy(namebuf, name);
- *ttyfd = open(name, O_RDWR|O_NOCTTY);
- if (*ttyfd < 0)
- {
- error("Could not open pty slave side %.100s: %.100s",
- name, strerror(errno));
- close(*ptyfd);
- return 0;
- }
- return 1;
-
+ *ptyfd = open("/dev/ptc", O_RDWR | O_NOCTTY);
+ if (*ptyfd < 0) {
+ error("Could not open /dev/ptc: %.100s", strerror(errno));
+ return 0;
+ }
+ name = ttyname(*ptyfd);
+ if (!name)
+ fatal("Open of /dev/ptc returns device for which ttyname fails.");
+ strcpy(namebuf, name);
+ *ttyfd = open(name, O_RDWR | O_NOCTTY);
+ if (*ttyfd < 0) {
+ error("Could not open pty slave side %.100s: %.100s",
+ name, strerror(errno));
+ close(*ptyfd);
+ return 0;
+ }
+ return 1;
#else /* HAVE_DEV_PTS_AND_PTC */
- /* BSD-style pty code. */
-
- char buf[64];
- int i;
- const char *ptymajors =
- "pqrstuvwxyzabcdefghijklmnoABCDEFGHIJKLMNOPQRSTUVWXYZ";
- const char *ptyminors = "0123456789abcdef";
- int num_minors = strlen(ptyminors);
- int num_ptys = strlen(ptymajors) * num_minors;
-
- for (i = 0; i < num_ptys; i++)
- {
- snprintf(buf, sizeof buf, "/dev/pty%c%c", ptymajors[i / num_minors],
- ptyminors[i % num_minors]);
- *ptyfd = open(buf, O_RDWR|O_NOCTTY);
- if (*ptyfd < 0)
- continue;
- snprintf(namebuf, sizeof buf, "/dev/tty%c%c", ptymajors[i / num_minors],
- ptyminors[i % num_minors]);
-
- /* Open the slave side. */
- *ttyfd = open(namebuf, O_RDWR|O_NOCTTY);
- if (*ttyfd < 0)
- {
- error("%.100s: %.100s", namebuf, strerror(errno));
- close(*ptyfd);
- return 0;
+ /* BSD-style pty code. */
+ char buf[64];
+ int i;
+ const char *ptymajors =
+ "pqrstuvwxyzabcdefghijklmnoABCDEFGHIJKLMNOPQRSTUVWXYZ";
+ const char *ptyminors = "0123456789abcdef";
+ int num_minors = strlen(ptyminors);
+ int num_ptys = strlen(ptymajors) * num_minors;
+
+ for (i = 0; i < num_ptys; i++) {
+ snprintf(buf, sizeof buf, "/dev/pty%c%c", ptymajors[i / num_minors],
+ ptyminors[i % num_minors]);
+ *ptyfd = open(buf, O_RDWR | O_NOCTTY);
+ if (*ptyfd < 0)
+ continue;
+ snprintf(namebuf, sizeof buf, "/dev/tty%c%c", ptymajors[i / num_minors],
+ ptyminors[i % num_minors]);
+
+ /* Open the slave side. */
+ *ttyfd = open(namebuf, O_RDWR | O_NOCTTY);
+ if (*ttyfd < 0) {
+ error("%.100s: %.100s", namebuf, strerror(errno));
+ close(*ptyfd);
+ return 0;
+ }
+ return 1;
}
- return 1;
- }
- return 0;
+ return 0;
#endif /* HAVE_DEV_PTS_AND_PTC */
#endif /* HAVE_DEV_PTMX */
#endif /* HAVE__GETPTY */
#endif /* HAVE_OPENPTY */
}
-/* Releases the tty. Its ownership is returned to root, and permissions to
- 0666. */
+/* Releases the tty. Its ownership is returned to root, and permissions to 0666. */
-void pty_release(const char *ttyname)
+void
+pty_release(const char *ttyname)
{
- if (chown(ttyname, (uid_t)0, (gid_t)0) < 0)
- debug("chown %.100s 0 0 failed: %.100s", ttyname, strerror(errno));
- if (chmod(ttyname, (mode_t)0666) < 0)
- debug("chmod %.100s 0666 failed: %.100s", ttyname, strerror(errno));
+ if (chown(ttyname, (uid_t) 0, (gid_t) 0) < 0)
+ debug("chown %.100s 0 0 failed: %.100s", ttyname, strerror(errno));
+ if (chmod(ttyname, (mode_t) 0666) < 0)
+ debug("chmod %.100s 0666 failed: %.100s", ttyname, strerror(errno));
}
/* Makes the tty the processes controlling tty and sets it to sane modes. */
-void pty_make_controlling_tty(int *ttyfd, const char *ttyname)
+void
+pty_make_controlling_tty(int *ttyfd, const char *ttyname)
{
- int fd;
+ int fd;
- /* First disconnect from the old controlling tty. */
+ /* First disconnect from the old controlling tty. */
#ifdef TIOCNOTTY
- fd = open("/dev/tty", O_RDWR|O_NOCTTY);
- if (fd >= 0)
- {
- (void)ioctl(fd, TIOCNOTTY, NULL);
- close(fd);
- }
+ fd = open("/dev/tty", O_RDWR | O_NOCTTY);
+ if (fd >= 0) {
+ (void) ioctl(fd, TIOCNOTTY, NULL);
+ close(fd);
+ }
#endif /* TIOCNOTTY */
- if (setsid() < 0)
- error("setsid: %.100s", strerror(errno));
-
- /* Verify that we are successfully disconnected from the controlling tty. */
- fd = open("/dev/tty", O_RDWR|O_NOCTTY);
- if (fd >= 0)
- {
- error("Failed to disconnect from controlling tty.");
- close(fd);
- }
-
- /* Make it our controlling tty. */
+ if (setsid() < 0)
+ error("setsid: %.100s", strerror(errno));
+
+ /* Verify that we are successfully disconnected from the
+ controlling tty. */
+ fd = open("/dev/tty", O_RDWR | O_NOCTTY);
+ if (fd >= 0) {
+ error("Failed to disconnect from controlling tty.");
+ close(fd);
+ }
+ /* Make it our controlling tty. */
#ifdef TIOCSCTTY
- debug("Setting controlling tty using TIOCSCTTY.");
- /* We ignore errors from this, because HPSUX defines TIOCSCTTY, but returns
- EINVAL with these arguments, and there is absolutely no documentation. */
- ioctl(*ttyfd, TIOCSCTTY, NULL);
+ debug("Setting controlling tty using TIOCSCTTY.");
+ /* We ignore errors from this, because HPSUX defines TIOCSCTTY,
+ but returns EINVAL with these arguments, and there is
+ absolutely no documentation. */
+ ioctl(*ttyfd, TIOCSCTTY, NULL);
#endif /* TIOCSCTTY */
- fd = open(ttyname, O_RDWR);
- if (fd < 0)
- error("%.100s: %.100s", ttyname, strerror(errno));
- else
- close(fd);
-
- /* Verify that we now have a controlling tty. */
- fd = open("/dev/tty", O_WRONLY);
- if (fd < 0)
- error("open /dev/tty failed - could not set controlling tty: %.100s",
- strerror(errno));
- else
- {
- close(fd);
- }
+ fd = open(ttyname, O_RDWR);
+ if (fd < 0)
+ error("%.100s: %.100s", ttyname, strerror(errno));
+ else
+ close(fd);
+
+ /* Verify that we now have a controlling tty. */
+ fd = open("/dev/tty", O_WRONLY);
+ if (fd < 0)
+ error("open /dev/tty failed - could not set controlling tty: %.100s",
+ strerror(errno));
+ else {
+ close(fd);
+ }
}
/* Changes the window size associated with the pty. */
-void pty_change_window_size(int ptyfd, int row, int col,
- int xpixel, int ypixel)
+void
+pty_change_window_size(int ptyfd, int row, int col,
+ int xpixel, int ypixel)
{
- struct winsize w;
- w.ws_row = row;
- w.ws_col = col;
- w.ws_xpixel = xpixel;
- w.ws_ypixel = ypixel;
- (void)ioctl(ptyfd, TIOCSWINSZ, &w);
+ struct winsize w;
+ w.ws_row = row;
+ w.ws_col = col;
+ w.ws_xpixel = xpixel;
+ w.ws_ypixel = ypixel;
+ (void) ioctl(ptyfd, TIOCSWINSZ, &w);
}
-
andersk / openssh.git / blobdiff