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authorUlrich Drepper <drepper@redhat.com>1998-09-18 17:59:03 +0000
committerUlrich Drepper <drepper@redhat.com>1998-09-18 17:59:03 +0000
commit00bc5db059212a20afb42da40b38d7f145a46dfd (patch)
tree090b419ffc6087f15fe9cba759f3055cb5d315ca /login/openpty.c
parent88263bc9ac99b5c99659173239a5a6e1bef25df6 (diff)
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Update.
1998-09-18 17:41 Ulrich Drepper <drepper@cygnus.com> * libio/fileops.c (_IO_new_file_underflow): Before allocating buffer make sure the pushback buffer is destroyed. (_IO_new_file_seekoff): Likewise. If mode==0 quit early with the result. Clear OEF flag after successful fseek. * libio/libio.h (_IO_FILE_complete): Add _IO_save_ptr. * libio/ftello.c (ftello): Add offset from original buffer if stream has pushed back characters. * libio/ftello64.c (ftello64): Likewise. * libio/iofgetpos.c (_IO_fgetpos): Likewise. * libio/iofgetpos64.c (_IO_fgetpos64): Likewise. * libio/ioftell.c (_IO_ftell): Likewise. * libio/genops.c (_IO_switch_to_main_get_area): Swap _IO_read_ptr and _IO_save_ptr. (_IO_switch_to_backup_area): Save _IO_read_ptr in _IO_save_ptr. (_IO_default_pbackfail): Only stored push back character in original buffer if it is the same as the one in the file at this position. * libio/iofclose.c: Free backup buffer if one is available. * libio/ioseekoff.c (_IO_seekoff): Only remove pushback buffer if mode!=0. * strdlib/strtol.c (strtol): Handle 0x... string for base!=0 correctly. * time/strftime.c [_LIBC] (ampm): Use tp->tm_hour not hour12. 1998-09-18 Mark Kettenis <kettenis@phys.uva.nl> * login/programs/pt_chown.c (more_help): Correct message that describes the purpose of the program. * login/openpty.c: Do not include pty-private.h. (pts_name): New function. Return name of slave pseudo terminal in an allocated buffer if necessary. (openpty): Use pts_name to get name of the slave end of the pseudo terminal pair. * sysdeps/unix/grantpt.c (grantpt): Free buffer allocated by pts_name before return. 1998-09-18 11:15 Ulrich Drepper <drepper@cygnus.com> * math/math.h: Define __NO_MATH_INLINES if __STRICT_ANSI__.
Diffstat (limited to 'login/openpty.c')
-rw-r--r--login/openpty.c129
1 files changed, 97 insertions, 32 deletions
diff --git a/login/openpty.c b/login/openpty.c
index 396ca09..630061d 100644
--- a/login/openpty.c
+++ b/login/openpty.c
@@ -17,7 +17,9 @@
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
+#include <errno.h>
#include <fcntl.h>
+#include <limits.h>
#include <pty.h>
#include <stdlib.h>
#include <string.h>
@@ -25,49 +27,112 @@
#include <unistd.h>
#include <sys/types.h>
-#include "pty-private.h"
+/* Return the result of ptsname_r in the buffer pointed to by PTS,
+ which should be of length BUF_LEN. If it is too long to fit in
+ this buffer, a sufficiently long buffer is allocated using malloc,
+ and returned in PTS. 0 is returned upon success, -1 otherwise. */
+static int
+pts_name (int fd, char **pts, size_t buf_len)
+{
+ int rv;
+ char *buf = *pts;
+
+ for (;;)
+ {
+ char *new_buf;
+
+ if (buf_len)
+ {
+ rv = ptsname_r (fd, buf, buf_len);
+
+ if (rv != 0 || memchr (buf, '\0', buf_len))
+ /* We either got an error, or we succeeded and the
+ returned name fit in the buffer. */
+ break;
+
+ /* Try again with a longer buffer. */
+ buf_len += buf_len; /* Double it */
+ }
+ else
+ /* No initial buffer; start out by mallocing one. */
+ buf_len = 128; /* First time guess. */
+
+ if (buf != *pts)
+ /* We've already malloced another buffer at least once. */
+ new_buf = realloc (buf, buf_len);
+ else
+ new_buf = malloc (buf_len);
+ if (! new_buf)
+ {
+ rv = -1;
+ __set_errno (ENOMEM);
+ break;
+ }
+ buf = new_buf;
+ }
+
+ if (rv == 0)
+ *pts = buf; /* Return buffer to the user. */
+ else if (buf != *pts)
+ free (buf); /* Free what we malloced when returning an error. */
+
+ return rv;
+}
+
+/* Create pseudo tty master slave pair and set terminal attributes
+ according to TERMP and WINP. Return handles for both ends in
+ AMASTER and ASLAVE, and return the name of the slave end in NAME. */
int
-openpty (pmast, pslave, pname, tio, wins)
- int *pmast;
- int *pslave;
- char *pname;
- struct termios *tio;
- struct winsize *wins;
+openpty (int *amaster, int *aslave, char *name, struct termios *termp,
+ struct winsize *winp)
{
- int pfd, tfd;
- char name[PTYNAMELEN];
+#ifdef PATH_MAX
+ char _buf[PATH_MAX];
+#else
+ char _buf[512];
+#endif
+ char *buf = _buf;
+ int master, slave;
- pfd = getpt ();
- if (pfd == -1)
+ master = getpt ();
+ if (master == -1)
return -1;
- if (grantpt (pfd))
- goto bail;
+ if (grantpt (master))
+ goto fail;
+
+ if (unlockpt (master))
+ goto fail;
- if (unlockpt (pfd))
- goto bail;
+ if (pts_name (master, &buf, sizeof (_buf)))
+ goto fail;
- if (ptsname_r (pfd, name, PTYNAMELEN) != 0)
- goto bail;
+ slave = open (buf, O_RDWR);
+ if (slave == -1)
+ {
+ if (buf != _buf)
+ free (buf);
- tfd = open (name, O_RDWR);
- if (tfd == -1)
- goto bail;
+ goto fail;
+ }
/* XXX Should we ignore errors here? */
- if(tio)
- tcsetattr (tfd, TCSAFLUSH, tio);
- if (wins)
- ioctl (tfd, TIOCSWINSZ, wins);
-
- *pmast = pfd;
- *pslave = tfd;
- if (pname != NULL)
- strcpy (pname, name);
- return 0;
+ if(termp)
+ tcsetattr (slave, TCSAFLUSH, termp);
+ if (winp)
+ ioctl (slave, TIOCSWINSZ, winp);
+
+ *amaster = master;
+ *aslave = slave;
+ if (name != NULL)
+ strcpy (name, buf);
-bail:
- close (pfd);
+ if (buf != _buf)
+ free (buf);
+ return 0;
+
+ fail:
+ close (master);
return -1;
}