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authorThomas White <taw@physics.org>2014-08-19 14:22:22 +0200
committerThomas White <taw@physics.org>2014-08-19 14:47:44 +0200
commit7ae6605846ecc70c937fca31b2133082aae055df (patch)
tree00bcacb21248f86caf91a02c55bc5178a52cd27f /lib/forkpty.c
parent1a532028cb2f2df6f12e518bdf6d3425bbb28b08 (diff)
Use Gnulib forkpty()
Diffstat (limited to 'lib/forkpty.c')
-rw-r--r--lib/forkpty.c73
1 files changed, 73 insertions, 0 deletions
diff --git a/lib/forkpty.c b/lib/forkpty.c
new file mode 100644
index 00000000..e8fe80e5
--- /dev/null
+++ b/lib/forkpty.c
@@ -0,0 +1,73 @@
+/* Fork a child process attached to the slave of a pseudo-terminal.
+ Copyright (C) 2010-2014 Free Software Foundation, Inc.
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
+
+#include <config.h>
+
+/* Specification. */
+#include <pty.h>
+
+#if HAVE_FORKPTY
+
+/* Provide a wrapper with the prototype of glibc-2.8 and newer. */
+# undef forkpty
+int
+rpl_forkpty (int *amaster, char *name, struct termios const *termp,
+ struct winsize const *winp)
+{
+ /* Cast away const, for implementations with weaker prototypes. */
+ return forkpty (amaster, name, (struct termios *) termp,
+ (struct winsize *) winp);
+}
+
+#else /* AIX 5.1, HP-UX 11, IRIX 6.5, Solaris 10, mingw */
+
+# include <pty.h>
+# include <unistd.h>
+
+extern int login_tty (int slave_fd);
+
+int
+forkpty (int *amaster, char *name,
+ const struct termios *termp, const struct winsize *winp)
+{
+ int master, slave, pid;
+
+ if (openpty (&master, &slave, name, termp, winp) == -1)
+ return -1;
+
+ switch (pid = fork ())
+ {
+ case -1:
+ close (master);
+ close (slave);
+ return -1;
+
+ case 0:
+ /* Child. */
+ close (master);
+ if (login_tty (slave))
+ _exit (1);
+ return 0;
+
+ default:
+ /* Parent. */
+ *amaster = master;
+ close (slave);
+ return pid;
+ }
+}
+
+#endif