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https://git.savannah.gnu.org/git/make.git
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dcca1b5b0e
* config.h-vms.template: add feature macro USE_DCL_COM_FILE to always write a DCL command file, enabled by default. * vmsjobs.c: with USE_DCL_COM_FILE enabled write make variables as DCL symbol assignments into the command file. This enables printing directory and make level info for recursive use of make. This also enables forced DCL symbol substitution in the actions.
922 lines
27 KiB
C
922 lines
27 KiB
C
/* --------------- Moved here from job.c ---------------
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This file must be #included in job.c, as it accesses static functions.
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Copyright (C) 1996-2014 Free Software Foundation, Inc.
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This file is part of GNU Make.
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GNU Make is free software; you can redistribute it and/or modify it under the
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terms of the GNU General Public License as published by the Free Software
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Foundation; either version 3 of the License, or (at your option) any later
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version.
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GNU Make is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
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A PARTICULAR PURPOSE. See the GNU General Public License for more details.
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You should have received a copy of the GNU General Public License along with
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this program. If not, see <http://www.gnu.org/licenses/>. */
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#include <string.h>
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#include <descrip.h>
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#include <clidef.h>
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char *vmsify (char *name, int type);
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static int vms_jobsefnmask = 0;
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/* Wait for nchildren children to terminate */
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static void
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vmsWaitForChildren(int *status)
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{
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while (1)
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{
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if (!vms_jobsefnmask)
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{
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*status = 0;
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return;
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}
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*status = sys$wflor (32, vms_jobsefnmask);
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}
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return;
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}
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/* Set up IO redirection. */
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static char *
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vms_redirect (struct dsc$descriptor_s *desc, char *fname, char *ibuf)
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{
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char *fptr;
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char saved;
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ibuf++;
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while (isspace ((unsigned char)*ibuf))
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ibuf++;
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fptr = ibuf;
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while (*ibuf && !isspace ((unsigned char)*ibuf))
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ibuf++;
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saved = *ibuf;
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*ibuf = 0;
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if (strcmp (fptr, "/dev/null") != 0)
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{
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strcpy (fname, vmsify (fptr, 0));
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if (strchr (fname, '.') == 0)
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strcat (fname, ".");
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}
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desc->dsc$w_length = strlen (fname);
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desc->dsc$a_pointer = fname;
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desc->dsc$b_dtype = DSC$K_DTYPE_T;
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desc->dsc$b_class = DSC$K_CLASS_S;
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if (*fname == 0)
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printf (_("Warning: Empty redirection\n"));
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if (saved=='\0')
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return ibuf;
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*ibuf = saved;
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return --ibuf;
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}
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/* found apostrophe at (p-1)
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inc p until after closing apostrophe.
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*/
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static char *
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vms_handle_apos (char *p)
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{
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int alast;
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alast = 0;
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while (*p != 0)
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if (*p == '"')
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if (alast)
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{
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alast = 0;
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p++;
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}
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else
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{
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p++;
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if (*p!='"')
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break;
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alast = 1;
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}
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else
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p++;
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return p;
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}
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static int ctrlYPressed= 0;
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/* This is called at main or AST level. It is at AST level for DONTWAITFORCHILD
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and at main level otherwise. In any case it is called when a child process
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terminated. At AST level it won't get interrupted by anything except a
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inner mode level AST.
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*/
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static int
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vmsHandleChildTerm(struct child *child)
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{
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int exit_code;
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register struct child *lastc, *c;
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int child_failed;
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vms_jobsefnmask &= ~(1 << (child->efn - 32));
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lib$free_ef (&child->efn);
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if (child->comname)
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{
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if (!ISDB (DB_JOBS) && !ctrlYPressed)
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unlink (child->comname);
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free (child->comname);
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}
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(void) sigblock (fatal_signal_mask);
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child_failed = !(child->cstatus & 1);
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if (child_failed)
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exit_code = child->cstatus;
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/* Search for a child matching the deceased one. */
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lastc = 0;
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#if defined(RECURSIVEJOBS) /* I've had problems with recursive stuff and process handling */
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for (c = children; c != 0 && c != child; lastc = c, c = c->next)
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;
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#else
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c = child;
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#endif
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if (child_failed && !c->noerror && !ignore_errors_flag)
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{
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/* The commands failed. Write an error message,
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delete non-precious targets, and abort. */
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child_error (c, c->cstatus, 0, 0, 0);
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c->file->update_status = us_failed;
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delete_child_targets (c);
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}
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else
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{
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if (child_failed)
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{
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/* The commands failed, but we don't care. */
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child_error (c, c->cstatus, 0, 0, 1);
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child_failed = 0;
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}
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#if defined(RECURSIVEJOBS) /* I've had problems with recursive stuff and process handling */
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/* If there are more commands to run, try to start them. */
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start_job (c);
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switch (c->file->command_state)
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{
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case cs_running:
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/* Successfully started. */
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break;
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case cs_finished:
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if (c->file->update_status != us_success)
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/* We failed to start the commands. */
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delete_child_targets (c);
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break;
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default:
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OS (error, NILF,
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_("internal error: '%s' command_state"), c->file->name);
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abort ();
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break;
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}
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#endif /* RECURSIVEJOBS */
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}
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/* Set the state flag to say the commands have finished. */
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c->file->command_state = cs_finished;
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notice_finished_file (c->file);
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#if defined(RECURSIVEJOBS) /* I've had problems with recursive stuff and process handling */
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/* Remove the child from the chain and free it. */
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if (lastc == 0)
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children = c->next;
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else
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lastc->next = c->next;
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free_child (c);
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#endif /* RECURSIVEJOBS */
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/* There is now another slot open. */
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if (job_slots_used > 0)
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--job_slots_used;
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/* If the job failed, and the -k flag was not given, die. */
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if (child_failed && !keep_going_flag)
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die (exit_code);
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(void) sigsetmask (sigblock (0) & ~(fatal_signal_mask));
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return 1;
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}
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/* VMS:
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Spawn a process executing the command in ARGV and return its pid. */
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#define MAXCMDLEN 200
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/* local helpers to make ctrl+c and ctrl+y working, see below */
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#include <iodef.h>
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#include <libclidef.h>
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#include <ssdef.h>
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static int ctrlMask= LIB$M_CLI_CTRLY;
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static int oldCtrlMask;
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static int setupYAstTried= 0;
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static unsigned short int chan= 0;
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static void
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reEnableAst(void)
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{
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lib$enable_ctrl (&oldCtrlMask,0);
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}
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static int
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astYHandler (void)
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{
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struct child *c;
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for (c = children; c != 0; c = c->next)
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sys$delprc (&c->pid, 0, 0);
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ctrlYPressed= 1;
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kill (getpid(),SIGQUIT);
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return SS$_NORMAL;
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}
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static void
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tryToSetupYAst(void)
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{
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$DESCRIPTOR(inputDsc,"SYS$COMMAND");
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int status;
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struct {
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short int status, count;
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int dvi;
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} iosb;
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unsigned short int loc_chan;
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setupYAstTried++;
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if (chan)
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loc_chan= chan;
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else
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{
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status= sys$assign(&inputDsc,&loc_chan,0,0);
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if (!(status&SS$_NORMAL))
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{
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lib$signal(status);
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return;
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}
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}
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status= sys$qiow (0, loc_chan, IO$_SETMODE|IO$M_CTRLYAST,&iosb,0,0,
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astYHandler,0,0,0,0,0);
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if (status==SS$_NORMAL)
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status= iosb.status;
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if (status!=SS$_NORMAL)
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{
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if (!chan)
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sys$dassgn(loc_chan);
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if (status!=SS$_ILLIOFUNC && status!=SS$_NOPRIV)
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lib$signal(status);
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return;
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}
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/* called from AST handler ? */
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if (setupYAstTried>1)
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return;
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if (atexit(reEnableAst))
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fprintf (stderr,
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_("-warning, you may have to re-enable CTRL-Y handling from DCL.\n"));
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status= lib$disable_ctrl (&ctrlMask, &oldCtrlMask);
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if (!(status&SS$_NORMAL))
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{
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lib$signal(status);
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return;
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}
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if (!chan)
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chan = loc_chan;
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}
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static int
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nextnl(char *cmd, int l)
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{
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int instring;
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instring = 0;
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while (cmd[l])
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{
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if (cmd[l]=='"')
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instring = !instring;
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else if (cmd[l]=='\n' && !instring)
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return ++l;
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++l;
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}
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return l;
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}
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int
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child_execute_job (char *argv, struct child *child)
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{
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int i;
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static struct dsc$descriptor_s cmddsc;
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static struct dsc$descriptor_s pnamedsc;
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static struct dsc$descriptor_s ifiledsc;
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static struct dsc$descriptor_s ofiledsc;
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static struct dsc$descriptor_s efiledsc;
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int have_redirection = 0;
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int have_append = 0;
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int have_newline = 0;
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int spflags = CLI$M_NOWAIT;
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int status;
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char *cmd = alloca (strlen (argv) + 512), *p, *q;
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char ifile[256], ofile[256], efile[256];
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int comnamelen;
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char procname[100];
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int in_string;
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/* Parse IO redirection. */
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ifile[0] = 0;
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ofile[0] = 0;
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efile[0] = 0;
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child->comname = NULL;
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DB (DB_JOBS, ("child_execute_job (%s)\n", argv));
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while (isspace ((unsigned char)*argv))
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argv++;
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if (*argv == 0)
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return 0;
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sprintf (procname, "GMAKE_%05x", getpid () & 0xfffff);
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pnamedsc.dsc$w_length = strlen(procname);
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pnamedsc.dsc$a_pointer = procname;
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pnamedsc.dsc$b_dtype = DSC$K_DTYPE_T;
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pnamedsc.dsc$b_class = DSC$K_CLASS_S;
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in_string = 0;
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/* Handle comments and redirection.
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For ONESHELL, the redirection must be on the first line. Any other
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redirection token is handled by DCL, that is, the pipe command with
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redirection can be used, but it should not be used on the first line
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for ONESHELL. */
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for (p = argv, q = cmd; *p; p++, q++)
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{
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if (*p == '"')
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in_string = !in_string;
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if (in_string)
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{
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*q = *p;
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continue;
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}
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switch (*p)
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{
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case '#':
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*p-- = 0;
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*q-- = 0;
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break;
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case '\\':
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p++;
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if (*p == '\n')
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p++;
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if (isspace ((unsigned char)*p))
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{
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do { p++; } while (isspace ((unsigned char)*p));
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p--;
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}
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*q = *p;
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break;
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case '<':
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if (have_newline==0)
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{
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p = vms_redirect (&ifiledsc, ifile, p);
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*q = ' ';
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have_redirection = 1;
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}
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else
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*q = *p;
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break;
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case '>':
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if (have_newline==0)
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{
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have_redirection = 1;
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if (*(p-1) == '2')
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{
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q--;
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if (strncmp (p, ">&1", 3) == 0)
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{
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p += 2;
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strcpy (efile, "sys$output");
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efiledsc.dsc$w_length = strlen(efile);
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efiledsc.dsc$a_pointer = efile;
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efiledsc.dsc$b_dtype = DSC$K_DTYPE_T;
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efiledsc.dsc$b_class = DSC$K_CLASS_S;
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}
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else
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p = vms_redirect (&efiledsc, efile, p);
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}
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else
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{
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if (*(p+1) == '>')
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{
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have_append = 1;
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p += 1;
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}
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p = vms_redirect (&ofiledsc, ofile, p);
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}
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*q = ' ';
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}
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else
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*q = *p;
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break;
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case '\n':
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have_newline++;
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default:
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*q = *p;
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break;
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}
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}
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*q = *p;
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while (isspace ((unsigned char)*--q))
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*q = '\0';
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#define VMS_EMPTY_ECHO "write sys$output \"\""
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if (have_newline == 0)
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{
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/* multiple shells */
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if (strncmp(cmd, "builtin_", 8) == 0)
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{
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child->pid = 270163;
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child->efn = 0;
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child->cstatus = 1;
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DB(DB_JOBS, (_("BUILTIN [%s][%s]\n"), cmd, cmd + 8));
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p = cmd + 8;
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if ((*(p) == 'c') && (*(p + 1) == 'd')
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&& ((*(p + 2) == ' ') || (*(p + 2) == '\t')))
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{
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p += 3;
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while ((*p == ' ') || (*p == '\t'))
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p++;
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DB(DB_JOBS, (_("BUILTIN CD %s\n"), p));
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if (chdir(p))
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return 0;
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else
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return 1;
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}
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else if ((*(p) == 'e')
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&& (*(p+1) == 'c')
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&& (*(p+2) == 'h')
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&& (*(p+3) == 'o')
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&& ((*(p+4) == ' ') || (*(p+4) == '\t') || (*(p+4) == '\0')))
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{
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/* This is not a real builtin, it is a built in pre-processing
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for the VMS/DCL echo (write sys$output) to ensure the to be echoed
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string is correctly quoted (with the DCL quote character '"'). */
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char *vms_echo;
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p += 4;
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if (*p == '\0')
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cmd = VMS_EMPTY_ECHO;
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else
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{
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p++;
|
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while ((*p == ' ') || (*p == '\t'))
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p++;
|
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if (*p == '\0')
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cmd = VMS_EMPTY_ECHO;
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else
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{
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vms_echo = alloca(strlen(p) + sizeof VMS_EMPTY_ECHO);
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strcpy(vms_echo, VMS_EMPTY_ECHO);
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vms_echo[sizeof VMS_EMPTY_ECHO - 2] = '\0';
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strcat(vms_echo, p);
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strcat(vms_echo, "\"");
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cmd = vms_echo;
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}
|
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}
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DB (DB_JOBS, (_("BUILTIN ECHO %s->%s\n"), p, cmd));
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}
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else
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{
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printf(_("Unknown builtin command '%s'\n"), cmd);
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fflush(stdout);
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return 0;
|
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}
|
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}
|
|
/* expand ':' aka 'do nothing' builtin for bash and friends */
|
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else if (cmd[0]==':' && cmd[1]=='\0')
|
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{
|
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cmd = "continue";
|
|
}
|
|
}
|
|
else
|
|
{
|
|
/* todo: expand ':' aka 'do nothing' builtin for bash and friends */
|
|
/* For 'one shell' expand all the
|
|
builtin_echo
|
|
to
|
|
write sys$output ""
|
|
where one is ......7 bytes longer.
|
|
At the same time ensure that the echo string is properly terminated.
|
|
For that, allocate a command buffer big enough for all possible expansions
|
|
(have_newline is the count), then expand, copy and terminate. */
|
|
char *tmp_cmd;
|
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int nloff = 0;
|
|
int vlen = 0;
|
|
int clen = 0;
|
|
int inecho;
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|
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tmp_cmd = alloca(strlen(cmd) + (have_newline + 1) * 7 + 1);
|
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tmp_cmd[0] = '\0';
|
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inecho = 0;
|
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while (cmd[nloff])
|
|
{
|
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if (inecho)
|
|
{
|
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if (clen < nloff - 1)
|
|
{
|
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memcpy(&tmp_cmd[vlen], &cmd[clen], nloff - clen - 1);
|
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vlen += nloff - clen - 1;
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clen = nloff;
|
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}
|
|
inecho = 0;
|
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tmp_cmd[vlen] = '"';
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vlen++;
|
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tmp_cmd[vlen] = '\n';
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vlen++;
|
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}
|
|
if (strncmp(&cmd[nloff], "builtin_", 8) == 0)
|
|
{
|
|
/* ??? */
|
|
child->pid = 270163;
|
|
child->efn = 0;
|
|
child->cstatus = 1;
|
|
|
|
DB (DB_JOBS, (_("BUILTIN [%s][%s]\n"), &cmd[nloff], &cmd[nloff+8]));
|
|
p = &cmd[nloff + 8];
|
|
if ((*(p) == 'e')
|
|
&& (*(p + 1) == 'c')
|
|
&& (*(p + 2) == 'h')
|
|
&& (*(p + 3) == 'o')
|
|
&& ((*(p + 4) == ' ') || (*(p + 4) == '\t') || (*(p + 4) == '\0')))
|
|
{
|
|
if (clen < nloff - 1)
|
|
{
|
|
memcpy(&tmp_cmd[vlen], &cmd[clen], nloff - clen - 1);
|
|
vlen += nloff - clen - 1;
|
|
clen = nloff;
|
|
if (inecho)
|
|
{
|
|
inecho = 0;
|
|
tmp_cmd[vlen] = '"';
|
|
vlen++;
|
|
}
|
|
tmp_cmd[vlen] = '\n';
|
|
vlen++;
|
|
}
|
|
inecho = 1;
|
|
p += 4;
|
|
while ((*p == ' ') || (*p == '\t'))
|
|
p++;
|
|
clen = p - cmd;
|
|
memcpy(&tmp_cmd[vlen], VMS_EMPTY_ECHO,
|
|
sizeof VMS_EMPTY_ECHO - 2);
|
|
vlen += sizeof VMS_EMPTY_ECHO - 2;
|
|
}
|
|
else
|
|
{
|
|
printf (_("Builtin command is unknown or unsupported in .ONESHELL: '%s'\n"), &cmd[nloff]);
|
|
fflush(stdout);
|
|
return 0;
|
|
}
|
|
}
|
|
nloff = nextnl(cmd, nloff + 1);
|
|
}
|
|
if (clen < nloff)
|
|
{
|
|
memcpy(&tmp_cmd[vlen], &cmd[clen], nloff - clen);
|
|
vlen += nloff - clen;
|
|
clen = nloff;
|
|
if (inecho)
|
|
{
|
|
inecho = 0;
|
|
tmp_cmd[vlen] = '"';
|
|
vlen++;
|
|
}
|
|
}
|
|
|
|
tmp_cmd[vlen] = '\0';
|
|
|
|
cmd = tmp_cmd;
|
|
}
|
|
|
|
#ifdef USE_DCL_COM_FILE
|
|
/* Enforce the creation of a command file.
|
|
Then all the make environment variables are written as DCL symbol
|
|
assignments into the command file as well, so that they are visible
|
|
in the sub-process but do not affect the current process.
|
|
Further, this way DCL reads the input stream and therefore does
|
|
'forced' symbol substitution, which it doesn't do for one-liners when
|
|
they are 'lib$spawn'ed. */
|
|
#else
|
|
/* Create a *.com file if either the command is too long for
|
|
lib$spawn, or the command contains a newline, or if redirection
|
|
is desired. Forcing commands with newlines into DCLs allows to
|
|
store search lists on user mode logicals. */
|
|
if (strlen (cmd) > MAXCMDLEN
|
|
|| (have_redirection != 0)
|
|
|| (have_newline != 0))
|
|
#endif
|
|
{
|
|
FILE *outfile;
|
|
char c;
|
|
char *sep;
|
|
int alevel = 0; /* apostrophe level */
|
|
int tmpstrlen;
|
|
char *tmpstr;
|
|
if (strlen (cmd) == 0)
|
|
{
|
|
printf (_("Error, empty command\n"));
|
|
fflush (stdout);
|
|
return 0;
|
|
}
|
|
|
|
outfile = output_tmpfile (&child->comname, "sys$scratch:CMDXXXXXX.COM");
|
|
/* 012345678901234567890 */
|
|
#define TMP_OFFSET 12
|
|
#define TMP_LEN 9
|
|
if (outfile == 0)
|
|
pfatal_with_name (_("fopen (temporary file)"));
|
|
comnamelen = strlen (child->comname);
|
|
tmpstr = &child->comname[TMP_OFFSET];
|
|
tmpstrlen = TMP_LEN;
|
|
/* The whole DCL "script" is executed as one action, and it behaves as
|
|
any DCL "script", that is errors stop it but warnings do not. Usually
|
|
the command on the last line, defines the exit code. However, with
|
|
redirections there is a prolog and possibly an epilog to implement
|
|
the redirection. Both are part of the script which is actually
|
|
executed. So if the redirection encounters an error in the prolog,
|
|
the user actions will not run; if in the epilog, the user actions
|
|
ran, but output is not captured. In both error cases, the error of
|
|
redirection is passed back and not the exit code of the actions. The
|
|
user should be able to enable DCL "script" verification with "set
|
|
verify". However, the prolog and epilog commands are not shown. Also,
|
|
if output redirection is used, the verification output is redirected
|
|
into that file as well. */
|
|
fprintf (outfile, "$ %.*s_1 = \"''f$verify(0)'\"\n", tmpstrlen, tmpstr);
|
|
if (ifile[0])
|
|
{
|
|
fprintf (outfile, "$ assign/user %s sys$input\n", ifile);
|
|
DB (DB_JOBS, (_("Redirected input from %s\n"), ifile));
|
|
ifiledsc.dsc$w_length = 0;
|
|
}
|
|
|
|
if (efile[0])
|
|
{
|
|
fprintf (outfile, "$ define sys$error %s\n", efile);
|
|
DB (DB_JOBS, (_("Redirected error to %s\n"), efile));
|
|
efiledsc.dsc$w_length = 0;
|
|
}
|
|
|
|
if (ofile[0])
|
|
if (have_append)
|
|
{
|
|
fprintf (outfile, "$ define sys$output %.*s\n", comnamelen-3, child->comname);
|
|
fprintf (outfile, "$ on error then $ goto %.*s\n", tmpstrlen, tmpstr);
|
|
DB (DB_JOBS, (_("Append output to %s\n"), ofile));
|
|
ofiledsc.dsc$w_length = 0;
|
|
}
|
|
else
|
|
{
|
|
fprintf (outfile, "$ define sys$output %s\n", ofile);
|
|
DB (DB_JOBS, (_("Redirected output to %s\n"), ofile));
|
|
ofiledsc.dsc$w_length = 0;
|
|
}
|
|
#ifdef USE_DCL_COM_FILE
|
|
/* Export the child environment into DCL symbols */
|
|
if (child->environment != 0)
|
|
{
|
|
char **ep = child->environment;
|
|
char *valstr;
|
|
while (*ep != 0)
|
|
{
|
|
valstr = strchr(*ep, '=');
|
|
if (valstr == NULL)
|
|
continue;
|
|
fprintf(outfile, "$ %.*s=\"%s\"\n", valstr - *ep, *ep,
|
|
valstr + 1);
|
|
ep++;
|
|
}
|
|
}
|
|
#endif
|
|
fprintf (outfile, "$ %.*s_ = f$verify(%.*s_1)\n", tmpstrlen, tmpstr, tmpstrlen, tmpstr);
|
|
p = sep = q = cmd;
|
|
for (c = '\n'; c; c = *q++)
|
|
{
|
|
switch (c)
|
|
{
|
|
case '\n':
|
|
/* At a newline, skip any whitespace around a leading $
|
|
from the command and issue exactly one $ into the DCL. */
|
|
while (isspace ((unsigned char)*p))
|
|
p++;
|
|
if (*p == '$')
|
|
p++;
|
|
while (isspace ((unsigned char)*p))
|
|
p++;
|
|
fwrite (p, 1, q - p, outfile);
|
|
fputc ('$', outfile);
|
|
fputc (' ', outfile);
|
|
/* Reset variables. */
|
|
p = sep = q;
|
|
break;
|
|
|
|
/* Nice places for line breaks are after strings, after
|
|
comma or space and before slash. */
|
|
case '"':
|
|
q = vms_handle_apos (q);
|
|
sep = q;
|
|
break;
|
|
case ',':
|
|
case ' ':
|
|
sep = q;
|
|
break;
|
|
case '/':
|
|
case '\0':
|
|
sep = q - 1;
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
if (sep - p > 78)
|
|
{
|
|
/* Enough stuff for a line. */
|
|
fwrite (p, 1, sep - p, outfile);
|
|
p = sep;
|
|
if (*sep)
|
|
{
|
|
/* The command continues. */
|
|
fputc ('-', outfile);
|
|
}
|
|
fputc ('\n', outfile);
|
|
}
|
|
}
|
|
|
|
if (*p)
|
|
{
|
|
/* At the end of the line, skip any whitespace around a leading $
|
|
from the command because one $ was already written into the DCL. */
|
|
while (isspace((unsigned char) *p))
|
|
p++;
|
|
if (*p == '$')
|
|
p++;
|
|
while (isspace((unsigned char) *p))
|
|
p++;
|
|
fwrite(p, 1, --q - p, outfile);
|
|
fputc('\n', outfile);
|
|
}
|
|
|
|
if (have_append)
|
|
{
|
|
fprintf (outfile, "$ %.*s: ! 'f$verify(0)\n", tmpstrlen, tmpstr);
|
|
fprintf (outfile, "$ %.*s_2 = $status\n", tmpstrlen, tmpstr);
|
|
fprintf (outfile, "$ on error then $ exit\n");
|
|
fprintf (outfile, "$ deassign sys$output\n");
|
|
if (efile[0])
|
|
fprintf (outfile, "$ deassign sys$error\n");
|
|
fprintf (outfile, "$ append:=append\n");
|
|
fprintf (outfile, "$ delete:=delete\n");
|
|
fprintf (outfile, "$ append/new %.*s %s\n", comnamelen-3, child->comname, ofile);
|
|
fprintf (outfile, "$ delete %.*s;*\n", comnamelen-3, child->comname);
|
|
fprintf (outfile, "$ exit '%.*s_2 + (0*f$verify(%.*s_1))\n", tmpstrlen, tmpstr, tmpstrlen, tmpstr);
|
|
DB (DB_JOBS, (_("Append %.*s and cleanup\n"), comnamelen-3, child->comname));
|
|
}
|
|
|
|
fclose (outfile);
|
|
|
|
sprintf (cmd, "$ @%s", child->comname);
|
|
|
|
DB (DB_JOBS, (_("Executing %s instead\n"), cmd));
|
|
}
|
|
|
|
cmddsc.dsc$w_length = strlen(cmd);
|
|
cmddsc.dsc$a_pointer = cmd;
|
|
cmddsc.dsc$b_dtype = DSC$K_DTYPE_T;
|
|
cmddsc.dsc$b_class = DSC$K_CLASS_S;
|
|
|
|
child->efn = 0;
|
|
while (child->efn < 32 || child->efn > 63)
|
|
{
|
|
status = lib$get_ef ((unsigned long *)&child->efn);
|
|
if (!(status & 1))
|
|
{
|
|
if (child->comname)
|
|
{
|
|
if (!ISDB (DB_JOBS))
|
|
unlink (child->comname);
|
|
free (child->comname);
|
|
}
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
sys$clref (child->efn);
|
|
|
|
vms_jobsefnmask |= (1 << (child->efn - 32));
|
|
|
|
/*
|
|
LIB$SPAWN [command-string]
|
|
[,input-file]
|
|
[,output-file]
|
|
[,flags]
|
|
[,process-name]
|
|
[,process-id] [,completion-status-address] [,byte-integer-event-flag-num]
|
|
[,AST-address] [,varying-AST-argument]
|
|
[,prompt-string] [,cli] [,table]
|
|
*/
|
|
|
|
#ifndef DONTWAITFORCHILD
|
|
/*
|
|
* Code to make ctrl+c and ctrl+y working.
|
|
* The problem starts with the synchronous case where after lib$spawn is
|
|
* called any input will go to the child. But with input re-directed,
|
|
* both control characters won't make it to any of the programs, neither
|
|
* the spawning nor to the spawned one. Hence the caller needs to spawn
|
|
* with CLI$M_NOWAIT to NOT give up the input focus. A sys$waitfr
|
|
* has to follow to simulate the wanted synchronous behaviour.
|
|
* The next problem is ctrl+y which isn't caught by the crtl and
|
|
* therefore isn't converted to SIGQUIT (for a signal handler which is
|
|
* already established). The only way to catch ctrl+y, is an AST
|
|
* assigned to the input channel. But ctrl+y handling of DCL needs to be
|
|
* disabled, otherwise it will handle it. Not to mention the previous
|
|
* ctrl+y handling of DCL needs to be re-established before make exits.
|
|
* One more: At the time of LIB$SPAWN signals are blocked. SIGQUIT will
|
|
* make it to the signal handler after the child "normally" terminates.
|
|
* This isn't enough. It seems reasonable for simple command lines like
|
|
* a 'cc foobar.c' spawned in a subprocess but it is unacceptable for
|
|
* spawning make. Therefore we need to abort the process in the AST.
|
|
*
|
|
* Prior to the spawn it is checked if an AST is already set up for
|
|
* ctrl+y, if not one is set up for a channel to SYS$COMMAND. In general
|
|
* this will work except if make is run in a batch environment, but there
|
|
* nobody can press ctrl+y. During the setup the DCL handling of ctrl+y
|
|
* is disabled and an exit handler is established to re-enable it.
|
|
* If the user interrupts with ctrl+y, the assigned AST will fire, force
|
|
* an abort to the subprocess and signal SIGQUIT, which will be caught by
|
|
* the already established handler and will bring us back to common code.
|
|
* After the spawn (now /nowait) a sys$waitfr simulates the /wait and
|
|
* enables the ctrl+y be delivered to this code. And the ctrl+c too,
|
|
* which the crtl converts to SIGINT and which is caught by the common
|
|
* signal handler. Because signals were blocked before entering this code
|
|
* sys$waitfr will always complete and the SIGQUIT will be processed after
|
|
* it (after termination of the current block, somewhere in common code).
|
|
* And SIGINT too will be delayed. That is ctrl+c can only abort when the
|
|
* current command completes. Anyway it's better than nothing :-)
|
|
*/
|
|
|
|
if (!setupYAstTried)
|
|
tryToSetupYAst();
|
|
status = lib$spawn (&cmddsc, /* cmd-string */
|
|
(ifiledsc.dsc$w_length == 0)?0:&ifiledsc, /* input-file */
|
|
(ofiledsc.dsc$w_length == 0)?0:&ofiledsc, /* output-file */
|
|
&spflags, /* flags */
|
|
&pnamedsc, /* proc name */
|
|
&child->pid, &child->cstatus, &child->efn,
|
|
0, 0,
|
|
0, 0, 0);
|
|
if (status & 1)
|
|
{
|
|
status= sys$waitfr (child->efn);
|
|
vmsHandleChildTerm(child);
|
|
}
|
|
#else
|
|
status = lib$spawn (&cmddsc,
|
|
(ifiledsc.dsc$w_length == 0)?0:&ifiledsc,
|
|
(ofiledsc.dsc$w_length == 0)?0:&ofiledsc,
|
|
&spflags,
|
|
&pnamedsc,
|
|
&child->pid, &child->cstatus, &child->efn,
|
|
vmsHandleChildTerm, child,
|
|
0, 0, 0);
|
|
#endif
|
|
|
|
if (!(status & 1))
|
|
{
|
|
printf (_("Error spawning, %d\n") ,status);
|
|
fflush (stdout);
|
|
switch (status)
|
|
{
|
|
case 0x1c:
|
|
errno = EPROCLIM;
|
|
break;
|
|
default:
|
|
errno = EFAIL;
|
|
}
|
|
}
|
|
|
|
return (status & 1);
|
|
}
|