Mercurial > vim
annotate src/pty.c @ 20330:a7dbf32b5cc0 v8.2.0720
patch 8.2.0720: occasional exit when encountering an X error
Commit: https://github.com/vim/vim/commit/b1062eb23e7a7a8b44f3416e79c3b28aa6c6c229
Author: Bram Moolenaar <Bram@vim.org>
Date: Sat May 9 16:11:33 2020 +0200
patch 8.2.0720: occasional exit when encountering an X error
Problem: Occasional exit when encountering an X error. (Manfred Lotz)
Solution: On an X error do not exit, do preserve files.
| author | Bram Moolenaar <Bram@vim.org> |
|---|---|
| date | Sat, 09 May 2020 16:15:04 +0200 |
| parents | 22f0dda71638 |
| children | 4411c2b96af9 |
| rev | line source |
|---|---|
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1 /* vi:set ts=8 sts=4 sw=4 noet: |
| 7 | 2 * |
| 3 * VIM - Vi IMproved by Bram Moolenaar | |
| 4 * | |
| 5 * Do ":help uganda" in Vim to read copying and usage conditions. | |
| 6 * Do ":help credits" in Vim to see a list of people who contributed. | |
| 7 * See README.txt for an overview of the Vim source code. | |
| 8 */ | |
| 9 /* | |
| 10 * The stuff in this file mostly comes from the "screen" program. | |
| 11 * Included with permission from Juergen Weigert. | |
| 12 * Copied from "pty.c". "putenv.c" was used for putenv() in misc2.c. | |
| 13 * | |
| 14 * It has been modified to work better with Vim. | |
| 15 * The parts that are not used in Vim have been deleted. | |
| 16 * See the "screen" sources for the complete stuff. | |
| 3282 | 17 * |
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18 * This specific version is distributed under the Vim license (attribution by |
| 3282 | 19 * Juergen Weigert), the GPL applies to the original version, see the |
| 20 * copyright notice below. | |
| 7 | 21 */ |
| 22 | |
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23 // Copyright (c) 1993 |
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24 // Juergen Weigert (jnweiger@immd4.informatik.uni-erlangen.de) |
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25 // Michael Schroeder (mlschroe@immd4.informatik.uni-erlangen.de) |
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26 // Copyright (c) 1987 Oliver Laumann |
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27 // |
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28 // This program is free software; you can redistribute it and/or modify |
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29 // it under the terms of the GNU General Public License as published by |
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30 // the Free Software Foundation; either version 2, or (at your option) |
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31 // any later version. |
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32 // |
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33 // This program is distributed in the hope that it will be useful, |
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34 // but WITHOUT ANY WARRANTY; without even the implied warranty of |
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35 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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36 // GNU General Public License for more details. |
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37 // |
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38 // You should have received a copy of the GNU General Public License |
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39 // along with this program (see the file COPYING); if not, write to the |
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40 // Free Software Foundation, Inc., |
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41 // 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA |
| 7 | 42 |
| 43 #include "vim.h" | |
| 44 | |
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45 #if defined(FEAT_GUI) || defined(FEAT_JOB_CHANNEL) |
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46 |
| 7 | 47 #include <signal.h> |
| 48 | |
| 49 #ifdef __CYGWIN32__ | |
| 50 # include <sys/termios.h> | |
| 51 #endif | |
| 52 | |
| 1030 | 53 #ifdef HAVE_SYS_IOCTL_H |
| 7 | 54 # include <sys/ioctl.h> |
| 55 #endif | |
| 56 | |
| 57 #if HAVE_STROPTS_H | |
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58 # include <sys/types.h> |
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59 # ifdef sinix |
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60 # define buf_T __system_buf_t__ |
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61 # endif |
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62 # include <stropts.h> |
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63 # ifdef sinix |
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64 # undef buf_T |
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65 # endif |
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66 # ifdef SUN_SYSTEM |
| 7 | 67 # include <sys/conf.h> |
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68 # if defined(HAVE_SYS_PTMS_H) && defined(HAVE_SVR4_PTYS) |
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69 # include <sys/ptms.h> |
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70 # endif |
| 7 | 71 # endif |
| 72 #endif | |
| 73 | |
| 1030 | 74 #ifdef HAVE_UNISTD_H |
| 7 | 75 # include <unistd.h> |
| 76 #endif | |
| 77 | |
| 78 #if HAVE_TERMIO_H | |
| 79 # include <termio.h> | |
| 80 #else | |
| 1030 | 81 # ifdef HAVE_TERMIOS_H |
| 7 | 82 # include <termios.h> |
| 83 # endif | |
| 84 #endif | |
| 85 | |
| 86 #if HAVE_SYS_STREAM_H | |
| 87 # include <sys/stream.h> | |
| 88 #endif | |
| 89 | |
| 90 #if HAVE_SYS_PTEM_H | |
| 91 # include <sys/ptem.h> | |
| 92 #endif | |
| 93 | |
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94 #if !defined(SUN_SYSTEM) && !defined(VMS) |
| 7 | 95 # include <sys/ioctl.h> |
| 96 #endif | |
| 97 | |
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98 #if defined(SUN_SYSTEM) && defined(LOCKPTY) && !defined(TIOCEXCL) |
| 7 | 99 # include <sys/ttold.h> |
| 100 #endif | |
| 101 | |
| 102 #ifdef ISC | |
| 103 # include <sys/tty.h> | |
| 104 # include <sys/sioctl.h> | |
| 105 # include <sys/pty.h> | |
| 106 #endif | |
| 107 | |
| 108 #ifdef sgi | |
| 109 # include <sys/sysmacros.h> | |
| 110 #endif | |
| 111 | |
| 112 #if defined(_INCLUDE_HPUX_SOURCE) && !defined(hpux) | |
| 113 # define hpux | |
| 114 #endif | |
| 115 | |
| 116 /* | |
| 117 * if no PTYRANGE[01] is in the config file, we pick a default | |
| 118 */ | |
| 119 #ifndef PTYRANGE0 | |
| 120 # define PTYRANGE0 "qprs" | |
| 121 #endif | |
| 122 #ifndef PTYRANGE1 | |
| 123 # define PTYRANGE1 "0123456789abcdef" | |
| 124 #endif | |
| 125 | |
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126 // SVR4 pseudo ttys don't seem to work with SCO-5 |
| 7 | 127 #ifdef M_UNIX |
| 128 # undef HAVE_SVR4_PTYS | |
| 129 #endif | |
| 130 | |
| 131 /* | |
| 2834 | 132 * Open all ptys with O_NOCTTY, just to be on the safe side. |
| 7 | 133 */ |
| 134 #ifndef O_NOCTTY | |
| 135 # define O_NOCTTY 0 | |
| 136 #endif | |
| 137 | |
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138 #if defined(HAVE_SVR4_PTYS) || defined(HAVE_POSIX_OPENPT) |
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139 // These should be in stdlib.h, but it depends on _XOPEN_SOURCE. |
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140 char *ptsname(int); |
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141 int unlockpt(int); |
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142 int grantpt(int); |
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143 int posix_openpt(int flags); |
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144 #endif |
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145 |
| 7 | 146 static void |
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147 initmaster(int f UNUSED) |
| 7 | 148 { |
| 149 #ifndef VMS | |
| 150 # ifdef POSIX | |
| 151 tcflush(f, TCIOFLUSH); | |
| 152 # else | |
| 153 # ifdef TIOCFLUSH | |
| 154 (void)ioctl(f, TIOCFLUSH, (char *) 0); | |
| 155 # endif | |
| 156 # endif | |
| 157 # ifdef LOCKPTY | |
| 158 (void)ioctl(f, TIOCEXCL, (char *) 0); | |
| 159 # endif | |
| 160 #endif | |
| 161 } | |
| 162 | |
| 163 /* | |
| 164 * This causes a hang on some systems, but is required for a properly working | |
| 165 * pty on others. Needs to be tuned... | |
| 166 */ | |
| 167 int | |
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168 setup_slavepty(int fd) |
| 7 | 169 { |
| 170 if (fd < 0) | |
| 171 return 0; | |
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172 #if defined(I_PUSH) && defined(HAVE_SVR4_PTYS) && !defined(sgi) \ |
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173 && !defined(linux) && !defined(__osf__) && !defined(M_UNIX) |
| 7 | 174 # if defined(HAVE_SYS_PTEM_H) || defined(hpux) |
| 175 if (ioctl(fd, I_PUSH, "ptem") != 0) | |
| 176 return -1; | |
| 177 # endif | |
| 178 if (ioctl(fd, I_PUSH, "ldterm") != 0) | |
| 179 return -1; | |
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180 # ifdef SUN_SYSTEM |
| 7 | 181 if (ioctl(fd, I_PUSH, "ttcompat") != 0) |
| 182 return -1; | |
| 183 # endif | |
| 184 #endif | |
| 185 return 0; | |
| 186 } | |
| 187 | |
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188 #if defined(HAVE_POSIX_OPENPT) && !defined(PTY_DONE) |
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189 #define PTY_DONE |
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190 int |
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191 mch_openpty(char **ttyn) |
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192 { |
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193 int f; |
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194 char *m; |
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195 RETSIGTYPE (*sigcld) SIGPROTOARG; |
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196 static char TtyName[32]; // used for opening a new pty-pair |
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197 |
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198 if ((f = posix_openpt(O_RDWR | O_NOCTTY | O_EXTRA)) == -1) |
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199 return -1; |
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200 |
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201 // SIGCHLD set to SIG_DFL for grantpt() because it fork()s and |
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202 // exec()s pt_chmod |
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203 sigcld = signal(SIGCHLD, SIG_DFL); |
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204 if ((m = ptsname(f)) == NULL || grantpt(f) || unlockpt(f)) |
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205 { |
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206 signal(SIGCHLD, sigcld); |
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207 close(f); |
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208 return -1; |
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209 } |
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210 signal(SIGCHLD, sigcld); |
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211 vim_strncpy((char_u *)TtyName, (char_u *)m, sizeof(TtyName) - 1); |
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212 initmaster(f); |
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213 *ttyn = TtyName; |
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214 return f; |
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215 } |
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216 #endif |
| 7 | 217 |
| 218 #if defined(OSX) && !defined(PTY_DONE) | |
| 219 #define PTY_DONE | |
| 220 int | |
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221 mch_openpty(char **ttyn) |
| 7 | 222 { |
| 223 int f; | |
| 224 static char TtyName[32]; | |
| 225 | |
| 226 if ((f = open_controlling_pty(TtyName)) < 0) | |
| 227 return -1; | |
| 228 initmaster(f); | |
| 229 *ttyn = TtyName; | |
| 230 return f; | |
| 231 } | |
| 232 #endif | |
| 233 | |
| 234 #if (defined(sequent) || defined(_SEQUENT_)) && defined(HAVE_GETPSEUDOTTY) \ | |
| 235 && !defined(PTY_DONE) | |
| 236 #define PTY_DONE | |
| 237 int | |
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238 mch_openpty(char **ttyn) |
| 7 | 239 { |
| 240 char *m, *s; | |
| 241 int f; | |
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242 // used for opening a new pty-pair: |
| 7 | 243 static char PtyName[32]; |
| 244 static char TtyName[32]; | |
| 245 | |
| 246 if ((f = getpseudotty(&s, &m)) < 0) | |
| 247 return -1; | |
| 248 #ifdef _SEQUENT_ | |
| 249 fvhangup(s); | |
| 250 #endif | |
| 2760 | 251 vim_strncpy((char_u *)PtyName, (char_u *)m, sizeof(PtyName) - 1); |
| 252 vim_strncpy((char_u *)TtyName, (char_u *)s, sizeof(TtyName) - 1); | |
| 7 | 253 initmaster(f); |
| 254 *ttyn = TtyName; | |
| 255 return f; | |
| 256 } | |
| 257 #endif | |
| 258 | |
| 259 #if defined(__sgi) && !defined(PTY_DONE) | |
| 260 #define PTY_DONE | |
| 261 int | |
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262 mch_openpty(char **ttyn) |
| 7 | 263 { |
| 264 int f; | |
| 265 char *name; | |
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266 RETSIGTYPE (*sigcld) SIGPROTOARG; |
| 7 | 267 |
| 268 /* | |
| 269 * SIGCHLD set to SIG_DFL for _getpty() because it may fork() and | |
| 270 * exec() /usr/adm/mkpts | |
| 271 */ | |
| 272 sigcld = signal(SIGCHLD, SIG_DFL); | |
| 273 name = _getpty(&f, O_RDWR | O_NONBLOCK | O_EXTRA, 0600, 0); | |
| 274 signal(SIGCHLD, sigcld); | |
| 275 | |
| 276 if (name == 0) | |
| 277 return -1; | |
| 278 initmaster(f); | |
| 279 *ttyn = name; | |
| 280 return f; | |
| 281 } | |
| 282 #endif | |
| 283 | |
| 284 #if defined(MIPS) && defined(HAVE_DEV_PTC) && !defined(PTY_DONE) | |
| 285 #define PTY_DONE | |
| 286 int | |
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287 mch_openpty(char **ttyn) |
| 7 | 288 { |
| 289 int f; | |
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290 stat_T buf; |
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291 // used for opening a new pty-pair: |
| 7 | 292 static char TtyName[32]; |
| 293 | |
| 294 if ((f = open("/dev/ptc", O_RDWR | O_NOCTTY | O_NONBLOCK | O_EXTRA, 0)) < 0) | |
| 295 return -1; | |
| 296 if (mch_fstat(f, &buf) < 0) | |
| 297 { | |
| 298 close(f); | |
| 299 return -1; | |
| 300 } | |
| 301 sprintf(TtyName, "/dev/ttyq%d", minor(buf.st_rdev)); | |
| 302 initmaster(f); | |
| 303 *ttyn = TtyName; | |
| 304 return f; | |
| 305 } | |
| 306 #endif | |
| 307 | |
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308 #if defined(HAVE_SVR4_PTYS) && !defined(PTY_DONE) && !defined(hpux) \ |
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309 && !(defined(MACOS_X) && !defined(MAC_OS_X_VERSION_10_6)) |
| 7 | 310 |
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311 // NOTE: Even though HPUX can have /dev/ptmx, the code below doesn't work! |
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312 // Same for Mac OS X Leopard (10.5). |
| 7 | 313 #define PTY_DONE |
| 314 int | |
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315 mch_openpty(char **ttyn) |
| 7 | 316 { |
| 317 int f; | |
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318 char *m; |
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319 RETSIGTYPE (*sigcld) SIGPROTOARG; |
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320 // used for opening a new pty-pair: |
| 7 | 321 static char TtyName[32]; |
| 322 | |
| 323 if ((f = open("/dev/ptmx", O_RDWR | O_NOCTTY | O_EXTRA, 0)) == -1) | |
| 324 return -1; | |
| 325 | |
| 326 /* | |
| 327 * SIGCHLD set to SIG_DFL for grantpt() because it fork()s and | |
| 328 * exec()s pt_chmod | |
| 329 */ | |
| 330 sigcld = signal(SIGCHLD, SIG_DFL); | |
| 331 if ((m = ptsname(f)) == NULL || grantpt(f) || unlockpt(f)) | |
| 332 { | |
| 333 signal(SIGCHLD, sigcld); | |
| 334 close(f); | |
| 335 return -1; | |
| 336 } | |
| 337 signal(SIGCHLD, sigcld); | |
| 2760 | 338 vim_strncpy((char_u *)TtyName, (char_u *)m, sizeof(TtyName) - 1); |
| 7 | 339 initmaster(f); |
| 340 *ttyn = TtyName; | |
| 341 return f; | |
| 342 } | |
| 343 #endif | |
| 344 | |
| 345 #if defined(_AIX) && defined(HAVE_DEV_PTC) && !defined(PTY_DONE) | |
| 346 #define PTY_DONE | |
| 347 | |
| 348 #ifdef _IBMR2 | |
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349 static int aixhack = -1; |
| 7 | 350 #endif |
| 351 | |
| 352 int | |
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353 mch_openpty(char **ttyn) |
| 7 | 354 { |
| 355 int f; | |
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356 // used for opening a new pty-pair: |
| 7 | 357 static char TtyName[32]; |
| 358 | |
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359 // a dumb looking loop replaced by mycrofts code: |
| 7 | 360 if ((f = open("/dev/ptc", O_RDWR | O_NOCTTY | O_EXTRA)) < 0) |
| 361 return -1; | |
| 2760 | 362 vim_strncpy((char_u *)TtyName, (char_u *)ttyname(f), sizeof(TtyName) - 1); |
| 1076 | 363 if (geteuid() != ROOT_UID && mch_access(TtyName, R_OK | W_OK)) |
| 7 | 364 { |
| 365 close(f); | |
| 366 return -1; | |
| 367 } | |
| 368 initmaster(f); | |
| 369 # ifdef _IBMR2 | |
| 370 if (aixhack >= 0) | |
| 371 close(aixhack); | |
| 372 if ((aixhack = open(TtyName, O_RDWR | O_NOCTTY | O_EXTRA, 0)) < 0) | |
| 373 { | |
| 374 close(f); | |
| 375 return -1; | |
| 376 } | |
| 377 # endif | |
| 378 *ttyn = TtyName; | |
| 379 return f; | |
| 380 } | |
| 381 #endif | |
| 382 | |
| 383 #ifndef PTY_DONE | |
| 384 | |
| 385 # ifdef hpux | |
| 386 static char PtyProto[] = "/dev/ptym/ptyXY"; | |
| 387 static char TtyProto[] = "/dev/pty/ttyXY"; | |
| 388 # else | |
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389 # if defined (__BEOS__) || defined(__HAIKU__) |
| 7 | 390 static char PtyProto[] = "/dev/pt/XY"; |
| 391 static char TtyProto[] = "/dev/tt/XY"; | |
| 392 # else | |
| 393 static char PtyProto[] = "/dev/ptyXY"; | |
| 394 static char TtyProto[] = "/dev/ttyXY"; | |
| 395 # endif | |
| 396 # endif | |
| 397 | |
| 398 int | |
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399 mch_openpty(char **ttyn) |
| 7 | 400 { |
| 401 char *p, *q, *l, *d; | |
| 402 int f; | |
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403 // used for opening a new pty-pair: |
| 7 | 404 static char PtyName[32]; |
| 405 static char TtyName[32]; | |
| 406 | |
| 407 strcpy(PtyName, PtyProto); | |
| 408 strcpy(TtyName, TtyProto); | |
| 409 for (p = PtyName; *p != 'X'; p++) | |
| 410 ; | |
| 411 for (q = TtyName; *q != 'X'; q++) | |
| 412 ; | |
| 413 for (l = PTYRANGE0; (*p = *l) != '\0'; l++) | |
| 414 { | |
| 415 for (d = PTYRANGE1; (p[1] = *d) != '\0'; d++) | |
| 416 { | |
| 417 if ((f = open(PtyName, O_RDWR | O_NOCTTY | O_EXTRA, 0)) == -1) | |
| 418 continue; | |
| 419 q[0] = *l; | |
| 420 q[1] = *d; | |
| 1076 | 421 if (geteuid() != ROOT_UID && mch_access(TtyName, R_OK | W_OK)) |
| 7 | 422 { |
| 423 close(f); | |
| 424 continue; | |
| 425 } | |
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426 #if defined(SUN_SYSTEM) && defined(TIOCGPGRP) && !defined(SUNOS3) |
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427 // Hack to ensure that the slave side of the pty is |
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428 // unused. May not work in anything other than SunOS4.1 |
| 7 | 429 { |
| 430 int pgrp; | |
| 431 | |
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432 // tcgetpgrp does not work (uses TIOCGETPGRP)! |
| 7 | 433 if (ioctl(f, TIOCGPGRP, (char *)&pgrp) != -1 || errno != EIO) |
| 434 { | |
| 435 close(f); | |
| 436 continue; | |
| 437 } | |
| 438 } | |
| 439 #endif | |
| 440 initmaster(f); | |
| 441 *ttyn = TtyName; | |
| 442 return f; | |
| 443 } | |
| 444 } | |
| 445 return -1; | |
| 446 } | |
| 447 #endif | |
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448 |
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449 /* |
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450 * Call isatty(fd), except for SunOS where it's done differently. |
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451 */ |
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452 int |
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453 mch_isatty(int fd) |
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454 { |
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455 # if defined(I_STR) && defined(HAVE_SYS_PTMS_H) && defined(HAVE_SVR4_PTYS) \ |
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456 && defined(SUN_SYSTEM) |
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457 // On SunOS, isatty() for /dev/ptmx returns false or sometimes can hang up |
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458 // in the inner ioctl(), and therefore first determine whether "fd" is a |
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459 // master device. |
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460 struct strioctl istr; |
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461 |
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462 istr.ic_cmd = ISPTM; |
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463 istr.ic_timout = 0; |
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464 istr.ic_dp = NULL; |
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465 istr.ic_len = 0; |
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466 |
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467 if (ioctl(fd, I_STR, &istr) == 0) |
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468 // Trick: return 2 in order to advice the caller that "fd" is a master |
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469 // device. cf. src/os_unix.c:get_tty_fd() |
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470 return 2; |
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471 # endif |
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472 return isatty(fd); |
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473 } |
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474 |
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475 #endif // FEAT_GUI || FEAT_JOB_CHANNEL |