diff options
Diffstat (limited to 'vmsjobs.c')
| -rw-r--r-- | vmsjobs.c | 667 |
1 files changed, 667 insertions, 0 deletions
diff --git a/vmsjobs.c b/vmsjobs.c new file mode 100644 index 0000000..bc15276 --- /dev/null +++ b/vmsjobs.c @@ -0,0 +1,667 @@ + + +/* --------------- Moved here from job.c --------------- + This file must be #included in job.c, as it accesses static functions. +*/ + +static int vms_jobsefnmask = 0; + +/* Wait for nchildren children to terminate */ +void +vmsWaitForChildren(int *status) +{ + while (1) + { + if (!vms_jobsefnmask) + { + *status = 0; + return; + } + + *status = sys$wflor (32, vms_jobsefnmask); + } + return; +} + +/* Set up IO redirection. */ + +char * +vms_redirect (struct dsc$descriptor_s *desc, char *fname, char *ibuf) +{ + char *fptr; + + ibuf++; + while (isspace ((unsigned char)*ibuf)) + ibuf++; + fptr = ibuf; + while (*ibuf && !isspace ((unsigned char)*ibuf)) + ibuf++; + *ibuf = 0; + if (strcmp (fptr, "/dev/null") != 0) + { + strcpy (fname, vmsify (fptr, 0)); + if (strchr (fname, '.') == 0) + strcat (fname, "."); + } + desc->dsc$w_length = strlen(fname); + desc->dsc$a_pointer = fname; + desc->dsc$b_dtype = DSC$K_DTYPE_T; + desc->dsc$b_class = DSC$K_CLASS_S; + + if (*fname == 0) + printf (_("Warning: Empty redirection\n")); + return ibuf; +} + + +/* found apostrophe at (p-1) + inc p until after closing apostrophe. + */ + +char * +vms_handle_apos (char *p) +{ + int alast; + +#define SEPCHARS ",/()= " + + alast = 0; + + while (*p != 0) + { + if (*p == '"') + { + if (alast) + { + alast = 0; + p++; + } + else + { + p++; + if (strchr (SEPCHARS, *p)) + break; + alast = 1; + } + } + else + p++; + } + + return p; +} + +#include <descrip.h> +#include <clidef.h> + +/* This is called as an AST when a child process dies (it won't get + interrupted by anything except a higher level AST). +*/ +int +vmsHandleChildTerm(struct child *child) +{ + int status; + register struct child *lastc, *c; + int child_failed; + + vms_jobsefnmask &= ~(1 << (child->efn - 32)); + + lib$free_ef(&child->efn); + + (void) sigblock (fatal_signal_mask); + + child_failed = !(child->cstatus & 1 || ((child->cstatus & 7) == 0)); + + /* Search for a child matching the deceased one. */ + lastc = 0; +#if defined(RECURSIVEJOBS) /* I've had problems with recursive stuff and process handling */ + for (c = children; c != 0 && c != child; lastc = c, c = c->next) + ; +#else + c = child; +#endif + + if (child_failed && !c->noerror && !ignore_errors_flag) + { + /* The commands failed. Write an error message, + delete non-precious targets, and abort. */ + child_error (c->file->name, c->cstatus, 0, 0, 0); + c->file->update_status = 1; + delete_child_targets (c); + } + else + { + if (child_failed) + { + /* The commands failed, but we don't care. */ + child_error (c->file->name, c->cstatus, 0, 0, 1); + child_failed = 0; + } + +#if defined(RECURSIVEJOBS) /* I've had problems with recursive stuff and process handling */ + /* If there are more commands to run, try to start them. */ + start_job (c); + + switch (c->file->command_state) + { + case cs_running: + /* Successfully started. */ + break; + + case cs_finished: + if (c->file->update_status != 0) { + /* We failed to start the commands. */ + delete_child_targets (c); + } + break; + + default: + error (NILF, _("internal error: `%s' command_state"), + c->file->name); + abort (); + break; + } +#endif /* RECURSIVEJOBS */ + } + + /* Set the state flag to say the commands have finished. */ + c->file->command_state = cs_finished; + notice_finished_file (c->file); + +#if defined(RECURSIVEJOBS) /* I've had problems with recursive stuff and process handling */ + /* Remove the child from the chain and free it. */ + if (lastc == 0) + children = c->next; + else + lastc->next = c->next; + free_child (c); +#endif /* RECURSIVEJOBS */ + + /* There is now another slot open. */ + if (job_slots_used > 0) + --job_slots_used; + + /* If the job failed, and the -k flag was not given, die. */ + if (child_failed && !keep_going_flag) + die (EXIT_FAILURE); + + (void) sigsetmask (sigblock (0) & ~(fatal_signal_mask)); + + return 1; +} + +/* VMS: + Spawn a process executing the command in ARGV and return its pid. */ + +#define MAXCMDLEN 200 + +/* local helpers to make ctrl+c and ctrl+y working, see below */ +#include <libclidef.h> +#include <ssdef.h> + +static int ctrlMask= LIB$M_CLI_CTRLY; +static int oldCtrlMask; +static int setupYAstTried= 0; +static int pidToAbort= 0; +static int chan= 0; + +static void +reEnableAst(void) +{ + lib$enable_ctrl (&oldCtrlMask,0); +} + +static void +astHandler (void) +{ + if (pidToAbort) { + sys$forcex (&pidToAbort, 0, SS$_ABORT); + pidToAbort= 0; + } + kill (getpid(),SIGQUIT); +} + +static void +tryToSetupYAst(void) +{ + $DESCRIPTOR(inputDsc,"SYS$COMMAND"); + int status; + struct { + short int status, count; + int dvi; + } iosb; + + setupYAstTried++; + + if (!chan) { + status= sys$assign(&inputDsc,&chan,0,0); + if (!(status&SS$_NORMAL)) { + lib$signal(status); + return; + } + } + status= sys$qiow (0, chan, IO$_SETMODE|IO$M_CTRLYAST,&iosb,0,0, + astHandler,0,0,0,0,0); + if (status==SS$_NORMAL) + status= iosb.status; + if (status==SS$_ILLIOFUNC || status==SS$_NOPRIV) { + sys$dassgn(chan); +#ifdef CTRLY_ENABLED_ANYWAY + fprintf (stderr, + _("-warning, CTRL-Y will leave sub-process(es) around.\n")); +#else + return; +#endif + } + else if (!(status&SS$_NORMAL)) { + sys$dassgn(chan); + lib$signal(status); + return; + } + + /* called from AST handler ? */ + if (setupYAstTried>1) + return; + if (atexit(reEnableAst)) + fprintf (stderr, + _("-warning, you may have to re-enable CTRL-Y handling from DCL.\n")); + status= lib$disable_ctrl (&ctrlMask, &oldCtrlMask); + if (!(status&SS$_NORMAL)) { + lib$signal(status); + return; + } +} + +int +child_execute_job (char *argv, struct child *child) +{ + int i; + static struct dsc$descriptor_s cmddsc; + static struct dsc$descriptor_s pnamedsc; + static struct dsc$descriptor_s ifiledsc; + static struct dsc$descriptor_s ofiledsc; + static struct dsc$descriptor_s efiledsc; + int have_redirection = 0; + int have_newline = 0; + + int spflags = CLI$M_NOWAIT; + int status; + char *cmd = alloca (strlen (argv) + 512), *p, *q; + char ifile[256], ofile[256], efile[256]; + char *comname = 0; + char procname[100]; + int in_string; + + /* Parse IO redirection. */ + + ifile[0] = 0; + ofile[0] = 0; + efile[0] = 0; + + DB (DB_JOBS, ("child_execute_job (%s)\n", argv)); + + while (isspace ((unsigned char)*argv)) + argv++; + + if (*argv == 0) + return 0; + + sprintf (procname, "GMAKE_%05x", getpid () & 0xfffff); + pnamedsc.dsc$w_length = strlen(procname); + pnamedsc.dsc$a_pointer = procname; + pnamedsc.dsc$b_dtype = DSC$K_DTYPE_T; + pnamedsc.dsc$b_class = DSC$K_CLASS_S; + + in_string = 0; + /* Handle comments and redirection. */ + for (p = argv, q = cmd; *p; p++, q++) + { + if (*p == '"') + in_string = !in_string; + if (in_string) + { + *q = *p; + continue; + } + switch (*p) + { + case '#': + *p-- = 0; + *q-- = 0; + break; + case '\\': + p++; + if (*p == '\n') + p++; + if (isspace ((unsigned char)*p)) + { + do { p++; } while (isspace ((unsigned char)*p)); + p--; + } + *q = *p; + break; + case '<': + p = vms_redirect (&ifiledsc, ifile, p); + *q = ' '; + have_redirection = 1; + break; + case '>': + have_redirection = 1; + if (*(p-1) == '2') + { + q--; + if (strncmp (p, ">&1", 3) == 0) + { + p += 3; + strcpy (efile, "sys$output"); + efiledsc.dsc$w_length = strlen(efile); + efiledsc.dsc$a_pointer = efile; + efiledsc.dsc$b_dtype = DSC$K_DTYPE_T; + efiledsc.dsc$b_class = DSC$K_CLASS_S; + } + else + { + p = vms_redirect (&efiledsc, efile, p); + } + } + else + { + p = vms_redirect (&ofiledsc, ofile, p); + } + *q = ' '; + break; + case '\n': + have_newline = 1; + default: + *q = *p; + break; + } + } + *q = *p; + while (isspace ((unsigned char)*--q)) + *q = '\0'; + + if (strncmp (cmd, "builtin_", 8) == 0) + { + child->pid = 270163; + child->efn = 0; + child->cstatus = 1; + + DB (DB_JOBS, (_("BUILTIN [%s][%s]\n"), cmd, cmd+8)); + + p = cmd + 8; + + if ((*(p) == 'c') + && (*(p+1) == 'd') + && ((*(p+2) == ' ') || (*(p+2) == '\t'))) + { + p += 3; + while ((*p == ' ') || (*p == '\t')) + p++; + DB (DB_JOBS, (_("BUILTIN CD %s\n"), p)); + if (chdir (p)) + return 0; + else + return 1; + } + else if ((*(p) == 'r') + && (*(p+1) == 'm') + && ((*(p+2) == ' ') || (*(p+2) == '\t'))) + { + int in_arg; + + /* rm */ + p += 3; + while ((*p == ' ') || (*p == '\t')) + p++; + in_arg = 1; + + DB (DB_JOBS, (_("BUILTIN RM %s\n"), p)); + while (*p) + { + switch (*p) + { + case ' ': + case '\t': + if (in_arg) + { + *p++ = ';'; + in_arg = 0; + } + break; + default: + break; + } + p++; + } + } + else + { + printf(_("Unknown builtin command '%s'\n"), cmd); + fflush(stdout); + return 0; + } + } + + /* Create a *.com file if either the command is too long for + lib$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)) + { + FILE *outfile; + char c; + char *sep; + int alevel = 0; /* apostrophe level */ + + if (strlen (cmd) == 0) + { + printf (_("Error, empty command\n")); + fflush (stdout); + return 0; + } + + outfile = open_tmpfile (&comname, "sys$scratch:CMDXXXXXX.COM"); + if (outfile == 0) + pfatal_with_name (_("fopen (temporary file)")); + + if (ifile[0]) + { + fprintf (outfile, "$ 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]) + { + fprintf (outfile, "$ define sys$output %s\n", ofile); + DB (DB_JOBS, (_("Redirected output to %s\n"), ofile)); + ofiledsc.dsc$w_length = 0; + } + + 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); + } + } + + fwrite (p, 1, q - p, outfile); + fputc ('\n', outfile); + + fclose (outfile); + + sprintf (cmd, "$ @%s", 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$get_ef ((unsigned long *)&child->efn); + if (!(status & 1)) + return 0; + } + + sys$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$w_length == 0)?0:&ofiledsc, /* output-file */ + &spflags, /* flags */ + &pnamedsc, /* proc name */ + &child->pid, &child->cstatus, &child->efn, + 0, 0, + 0, 0, 0); + if (status & 1) + { + pidToAbort= child->pid; + status= sys$waitfr (child->efn); + pidToAbort= 0; + 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; + } + } + + if (comname && !ISDB (DB_JOBS)) + unlink (comname); + + return (status & 1); +} |