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comparison src/s/linux.h @ 371:cc15677e0335 r21-2b1

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Import from CVS: tag r21-2b1
author cvs
date Mon, 13 Aug 2007 11:03:08 +0200
parents a4f53d9b3154
children 8626e4521993
comparison
equal deleted inserted replaced
370:bd866891f083 371:cc15677e0335
192 /* Use BSD process groups, but use setpgid() instead of setpgrp() to 192 /* Use BSD process groups, but use setpgid() instead of setpgrp() to
193 actually set a process group. */ 193 actually set a process group. */
194 194
195 /* XEmacs: removed setpgrp() definition because we use setpgid() when 195 /* XEmacs: removed setpgrp() definition because we use setpgid() when
196 it's available, and autodetect it. */ 196 it's available, and autodetect it. */
197
198 #if defined(HAVE_GRANTPT) && defined(HAVE_UNLOCKPT) && defined(HAVE_PTSNAME)
199 /* UNIX98 PTYs are available.
200 Added by Florian Weimer <Florian.Weimer@RUS.Uni-Stuttgart.DE>,
201 RUS-CERT, University of Stuttgart. Based on Emacs code for DGUX. */
202
203 #define PTY_ITERATION for (i = 0; i < 1; i++)
204 /* no iteration at all */
205
206 /* Use getpt() if it's available, because it provides Unix98 PTY
207 emulation for kernels which doesn't support it natively. */
208
209 #ifdef HAVE_GETPT
210 #define PTY_OPEN \
211 do { \
212 fd = getpt(); \
213 if (fcntl (fd, F_SETFL, O_NDELAY) == -1) \
214 fatal ("could not set master PTY to non-block mode"); \
215 } while (0)
216
217 #else
218 /* the master PTY device */
219 #define PTY_NAME_SPRINTF strcpy (pty_name, "/dev/ptmx");
220 #endif
221
222 /* This sets the name of the slave side of the PTY. grantpt(3) and
223 unlockpt(3) may fork a subprocess, so keep sigchld_handler() from
224 intercepting that death. */
225
226 #define PTY_TTY_NAME_SPRINTF \
227 { \
228 char *ptsname(), *ptyname; \
229 \
230 EMACS_BLOCK_SIGNAL (SIGCHLD); \
231 if (grantpt(fd) == -1) \
232 fatal("could not grant slave pty"); \
233 if (unlockpt(fd) == -1) \
234 fatal("could not unlock slave pty"); \
235 if (!(ptyname = ptsname(fd))) \
236 fatal ("could not enable slave pty"); \
237 strncpy(pty_name, ptyname, sizeof(pty_name)); \
238 pty_name[sizeof(pty_name) - 1] = 0; \
239 EMACS_UNBLOCK_SIGNAL (SIGCHLD); \
240 }
241
242 #endif