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comparison src/process-unix.c @ 444:576fb035e263 r21-2-37

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Import from CVS: tag r21-2-37
author cvs
date Mon, 13 Aug 2007 11:36:19 +0200
parents abe6d1db359e
children c33ae14dd6d0
comparison
equal deleted inserted replaced
443:a8296e22da4e 444:576fb035e263
1405 /* If the subtty field of the process data is not filled in, do so now. */ 1405 /* If the subtty field of the process data is not filled in, do so now. */
1406 static void 1406 static void
1407 try_to_initialize_subtty (struct unix_process_data *upd) 1407 try_to_initialize_subtty (struct unix_process_data *upd)
1408 { 1408 {
1409 if (upd->pty_flag 1409 if (upd->pty_flag
1410 && (upd->subtty = -1 || ! isatty (upd->subtty)) 1410 && (upd->subtty == -1 || ! isatty (upd->subtty))
1411 && STRINGP (upd->tty_name)) 1411 && STRINGP (upd->tty_name))
1412 upd->subtty = open (XSTRING_DATA (upd->tty_name), O_RDWR, 0); 1412 upd->subtty = open ((char *) XSTRING_DATA (upd->tty_name), O_RDWR, 0);
1413 } 1413 }
1414 1414
1415 /* Send signal number SIGNO to PROCESS. 1415 /* Send signal number SIGNO to PROCESS.
1416 CURRENT_GROUP means send to the process group that currently owns 1416 CURRENT_GROUP means send to the process group that currently owns
1417 the terminal being used to communicate with PROCESS. 1417 the terminal being used to communicate with PROCESS.
1473 many systems. POSIX tcgetpgrp(), since it is *documented* as not 1473 many systems. POSIX tcgetpgrp(), since it is *documented* as not
1474 doing what we want, is actually less likely to work than the BSD 1474 doing what we want, is actually less likely to work than the BSD
1475 ioctl TIOCGPGRP it is supposed to obsolete. Sometimes we have to 1475 ioctl TIOCGPGRP it is supposed to obsolete. Sometimes we have to
1476 use TIOCGPGRP on the master end, sometimes the slave end 1476 use TIOCGPGRP on the master end, sometimes the slave end
1477 (probably an AIX bug). So we better get a fd for the slave if we 1477 (probably an AIX bug). So we better get a fd for the slave if we
1478 haven't got it yet. On some systems none of these work, so then 1478 haven't got it yet.
1479 we just fall back to the non-current_group behavior and kill the 1479
1480 process group of the child. */ 1480 Anal operating systems like SGI Irix and Compaq Tru64 adhere
1481 strictly to the letter of the law, so our hack doesn't work.
1482 The following fragment from an Irix header file is suggestive:
1483
1484 #ifdef __notdef__
1485 // this is not currently supported
1486 #define TIOCSIGNAL (tIOC|31) // pty: send signal to slave
1487 #endif
1488
1489 On those systems where none of our tricks work, we just fall back
1490 to the non-current_group behavior and kill the process group of
1491 the child.
1492 */
1481 if (current_group) 1493 if (current_group)
1482 { 1494 {
1483 try_to_initialize_subtty (d); 1495 try_to_initialize_subtty (d);
1484 1496
1485 #ifdef SIGNALS_VIA_CHARACTERS 1497 #ifdef SIGNALS_VIA_CHARACTERS