mirror of
https://github.com/rfivet/uemacs.git
synced 2024-12-22 09:06:38 -05:00
12ba84c8dd
I'm not 100% sure we really should even be doing this whole "keyboard" open/close for termcap, but even if the right thing to do ends up being to just do everything in the TTopen/TTclose (and make TTkopen/TTkclose no-ops), it does seem to be the right thing to do. Reported-by: Bijan Soleymani <bijan@psq.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
630 lines
14 KiB
C
630 lines
14 KiB
C
/* spaw.c
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*
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* Various operating system access commands.
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*
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* <odified by Petri Kutvonen
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*/
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#include <stdio.h>
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#include <unistd.h>
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#include "estruct.h"
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#include "edef.h"
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#include "efunc.h"
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#if VMS
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#define EFN 0 /* Event flag. */
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#include <ssdef.h> /* Random headers. */
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#include <stsdef.h>
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#include <descrip.h>
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#include <iodef.h>
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extern int oldmode[3]; /* In "termio.c" */
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extern int newmode[3]; /* In "termio.c" */
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extern short iochan; /* In "termio.c" */
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#endif
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#if V7 | USG | BSD
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#include <signal.h>
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#ifdef SIGWINCH
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extern int chg_width, chg_height;
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extern void sizesignal(int);
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#endif
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#endif
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#if MSDOS & (MSC | TURBO)
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#include <process.h>
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#endif
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/*
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* Create a subjob with a copy of the command intrepreter in it. When the
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* command interpreter exits, mark the screen as garbage so that you do a full
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* repaint. Bound to "^X C". The message at the start in VMS puts out a newline.
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* Under some (unknown) condition, you don't get one free when DCL starts up.
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*/
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int spawncli(int f, int n)
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{
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#if V7 | USG | BSD
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char *cp;
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#endif
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/* don't allow this command if restricted */
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if (restflag)
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return resterr();
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#if VMS
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movecursor(term.t_nrow, 0); /* In last line. */
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mlputs("(Starting DCL)\r\n");
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TTflush(); /* Ignore "ttcol". */
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sgarbf = TRUE;
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sys(NULL);
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sleep(1);
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mlputs("\r\n(Returning from DCL)\r\n");
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TTflush();
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sleep(1);
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return TRUE;
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#endif
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#if MSDOS & (MSC | TURBO)
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movecursor(term.t_nrow, 0); /* Seek to last line. */
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TTflush();
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TTkclose();
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shellprog("");
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TTkopen();
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sgarbf = TRUE;
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return TRUE;
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#endif
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#if V7 | USG | BSD
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movecursor(term.t_nrow, 0); /* Seek to last line. */
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TTflush();
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TTclose(); /* stty to old settings */
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TTkclose(); /* Close "keyboard" */
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if ((cp = getenv("SHELL")) != NULL && *cp != '\0')
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system(cp);
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else
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#if BSD
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system("exec /bin/csh");
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#else
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system("exec /bin/sh");
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#endif
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sgarbf = TRUE;
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sleep(2);
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TTopen();
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TTkopen();
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#ifdef SIGWINCH
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/*
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* This fools the update routines to force a full
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* redraw with complete window size checking.
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* -lbt
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*/
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chg_width = term.t_ncol;
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chg_height = term.t_nrow + 1;
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term.t_nrow = term.t_ncol = 0;
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#endif
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return TRUE;
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#endif
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}
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#if BSD | __hpux | SVR4
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int bktoshell(int f, int n)
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{ /* suspend MicroEMACS and wait to wake up */
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vttidy();
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/******************************
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int pid;
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pid = getpid();
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kill(pid,SIGTSTP);
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******************************/
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kill(0, SIGTSTP);
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return TRUE;
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}
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void rtfrmshell(void)
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{
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TTopen();
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curwp->w_flag = WFHARD;
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sgarbf = TRUE;
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}
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#endif
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/*
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* Run a one-liner in a subjob. When the command returns, wait for a single
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* character to be typed, then mark the screen as garbage so a full repaint is
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* done. Bound to "C-X !".
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*/
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int spawn(int f, int n)
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{
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int s;
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char line[NLINE];
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/* don't allow this command if restricted */
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if (restflag)
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return resterr();
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#if VMS
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if ((s = mlreply("!", line, NLINE)) != TRUE)
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return s;
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movecursor(term.t_nrow, 0);
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TTflush();
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s = sys(line); /* Run the command. */
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if (clexec == FALSE) {
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mlputs("\r\n\n(End)"); /* Pause. */
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TTflush();
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tgetc();
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}
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sgarbf = TRUE;
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return s;
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#endif
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#if MSDOS
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if ((s = mlreply("!", line, NLINE)) != TRUE)
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return s;
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movecursor(term.t_nrow, 0);
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TTkclose();
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shellprog(line);
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TTkopen();
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/* if we are interactive, pause here */
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if (clexec == FALSE) {
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mlputs("\r\n(End)");
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tgetc();
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}
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sgarbf = TRUE;
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return TRUE;
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#endif
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#if V7 | USG | BSD
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if ((s = mlreply("!", line, NLINE)) != TRUE)
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return s;
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TTflush();
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TTclose(); /* stty to old modes */
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TTkclose();
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system(line);
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fflush(stdout); /* to be sure P.K. */
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TTopen();
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if (clexec == FALSE) {
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mlputs("(End)"); /* Pause. */
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TTflush();
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while ((s = tgetc()) != '\r' && s != ' ');
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mlputs("\r\n");
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}
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TTkopen();
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sgarbf = TRUE;
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return TRUE;
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#endif
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}
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/*
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* Run an external program with arguments. When it returns, wait for a single
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* character to be typed, then mark the screen as garbage so a full repaint is
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* done. Bound to "C-X $".
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*/
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int execprg(int f, int n)
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{
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int s;
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char line[NLINE];
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/* don't allow this command if restricted */
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if (restflag)
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return resterr();
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#if VMS
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if ((s = mlreply("!", line, NLINE)) != TRUE)
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return s;
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TTflush();
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s = sys(line); /* Run the command. */
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mlputs("\r\n\n(End)"); /* Pause. */
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TTflush();
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tgetc();
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sgarbf = TRUE;
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return s;
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#endif
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#if MSDOS
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if ((s = mlreply("$", line, NLINE)) != TRUE)
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return s;
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movecursor(term.t_nrow, 0);
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TTkclose();
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execprog(line);
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TTkopen();
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/* if we are interactive, pause here */
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if (clexec == FALSE) {
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mlputs("\r\n(End)");
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tgetc();
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}
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sgarbf = TRUE;
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return TRUE;
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#endif
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#if V7 | USG | BSD
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if ((s = mlreply("!", line, NLINE)) != TRUE)
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return s;
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TTputc('\n'); /* Already have '\r' */
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TTflush();
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TTclose(); /* stty to old modes */
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TTkclose();
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system(line);
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fflush(stdout); /* to be sure P.K. */
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TTopen();
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mlputs("(End)"); /* Pause. */
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TTflush();
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while ((s = tgetc()) != '\r' && s != ' ');
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sgarbf = TRUE;
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return TRUE;
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#endif
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}
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/*
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* Pipe a one line command into a window
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* Bound to ^X @
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*/
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int pipecmd(int f, int n)
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{
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int s; /* return status from CLI */
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struct window *wp; /* pointer to new window */
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struct buffer *bp; /* pointer to buffer to zot */
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char line[NLINE]; /* command line send to shell */
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static char bname[] = "command";
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static char filnam[NSTRING] = "command";
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#if MSDOS
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char *tmp;
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FILE *fp;
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int len;
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#endif
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/* don't allow this command if restricted */
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if (restflag)
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return resterr();
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#if MSDOS
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if ((tmp = getenv("TMP")) == NULL
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&& (tmp = getenv("TEMP")) == NULL)
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strcpy(filnam, "command");
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else {
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strcpy(filnam, tmp);
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len = strlen(tmp);
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if (len <= 0 || filnam[len - 1] != '\\'
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&& filnam[len - 1] != '/')
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strcat(filnam, "\\");
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strcat(filnam, "command");
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}
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#endif
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#if VMS
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mlwrite("Not available under VMS");
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return FALSE;
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#endif
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/* get the command to pipe in */
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if ((s = mlreply("@", line, NLINE)) != TRUE)
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return s;
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/* get rid of the command output buffer if it exists */
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if ((bp = bfind(bname, FALSE, 0)) != FALSE) {
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/* try to make sure we are off screen */
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wp = wheadp;
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while (wp != NULL) {
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if (wp->w_bufp == bp) {
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#if PKCODE
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if (wp == curwp)
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delwind(FALSE, 1);
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else
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onlywind(FALSE, 1);
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break;
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#else
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onlywind(FALSE, 1);
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break;
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#endif
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}
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wp = wp->w_wndp;
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}
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if (zotbuf(bp) != TRUE)
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return FALSE;
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}
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#if MSDOS
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strcat(line, " >>");
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strcat(line, filnam);
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movecursor(term.t_nrow, 0);
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TTkclose();
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shellprog(line);
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TTkopen();
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sgarbf = TRUE;
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if ((fp = fopen(filnam, "r")) == NULL) {
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s = FALSE;
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} else {
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fclose(fp);
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s = TRUE;
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}
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#endif
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#if V7 | USG | BSD
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TTflush();
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TTclose(); /* stty to old modes */
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TTkclose();
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strcat(line, ">");
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strcat(line, filnam);
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system(line);
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TTopen();
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TTkopen();
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TTflush();
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sgarbf = TRUE;
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s = TRUE;
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#endif
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if (s != TRUE)
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return s;
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/* split the current window to make room for the command output */
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if (splitwind(FALSE, 1) == FALSE)
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return FALSE;
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/* and read the stuff in */
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if (getfile(filnam, FALSE) == FALSE)
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return FALSE;
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/* make this window in VIEW mode, update all mode lines */
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curwp->w_bufp->b_mode |= MDVIEW;
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wp = wheadp;
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while (wp != NULL) {
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wp->w_flag |= WFMODE;
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wp = wp->w_wndp;
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}
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/* and get rid of the temporary file */
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unlink(filnam);
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return TRUE;
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}
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/*
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* filter a buffer through an external DOS program
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* Bound to ^X #
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*/
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int filter_buffer(int f, int n)
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{
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int s; /* return status from CLI */
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struct buffer *bp; /* pointer to buffer to zot */
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char line[NLINE]; /* command line send to shell */
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char tmpnam[NFILEN]; /* place to store real file name */
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static char bname1[] = "fltinp";
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static char filnam1[] = "fltinp";
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static char filnam2[] = "fltout";
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/* don't allow this command if restricted */
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if (restflag)
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return resterr();
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if (curbp->b_mode & MDVIEW) /* don't allow this command if */
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return rdonly(); /* we are in read only mode */
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#if VMS
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mlwrite("Not available under VMS");
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return FALSE;
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#endif
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/* get the filter name and its args */
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if ((s = mlreply("#", line, NLINE)) != TRUE)
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return s;
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/* setup the proper file names */
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bp = curbp;
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strcpy(tmpnam, bp->b_fname); /* save the original name */
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strcpy(bp->b_fname, bname1); /* set it to our new one */
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/* write it out, checking for errors */
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if (writeout(filnam1) != TRUE) {
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mlwrite("(Cannot write filter file)");
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strcpy(bp->b_fname, tmpnam);
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return FALSE;
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}
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#if MSDOS
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strcat(line, " <fltinp >fltout");
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movecursor(term.t_nrow - 1, 0);
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TTkclose();
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shellprog(line);
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TTkopen();
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sgarbf = TRUE;
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s = TRUE;
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#endif
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#if V7 | USG | BSD
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TTputc('\n'); /* Already have '\r' */
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TTflush();
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TTclose(); /* stty to old modes */
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TTkclose();
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strcat(line, " <fltinp >fltout");
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system(line);
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TTopen();
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TTkopen();
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TTflush();
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sgarbf = TRUE;
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s = TRUE;
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#endif
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/* on failure, escape gracefully */
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if (s != TRUE || (readin(filnam2, FALSE) == FALSE)) {
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mlwrite("(Execution failed)");
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strcpy(bp->b_fname, tmpnam);
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unlink(filnam1);
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unlink(filnam2);
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return s;
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}
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/* reset file name */
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strcpy(bp->b_fname, tmpnam); /* restore name */
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bp->b_flag |= BFCHG; /* flag it as changed */
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/* and get rid of the temporary file */
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unlink(filnam1);
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unlink(filnam2);
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return TRUE;
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}
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#if VMS
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/*
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* Run a command. The "cmd" is a pointer to a command string, or NULL if you
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* want to run a copy of DCL in the subjob (this is how the standard routine
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* LIB$SPAWN works. You have to do wierd stuff with the terminal on the way in
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* and the way out, because DCL does not want the channel to be in raw mode.
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*/
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int sys(char *cmd)
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{
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struct dsc$descriptor cdsc;
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struct dsc$descriptor *cdscp;
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long status;
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long substatus;
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long iosb[2];
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status = SYS$QIOW(EFN, iochan, IO$_SETMODE, iosb, 0, 0,
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oldmode, sizeof(oldmode), 0, 0, 0, 0);
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if (status != SS$_NORMAL || (iosb[0] & 0xFFFF) != SS$_NORMAL)
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return FALSE;
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cdscp = NULL; /* Assume DCL. */
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if (cmd != NULL) { /* Build descriptor. */
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cdsc.dsc$a_pointer = cmd;
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cdsc.dsc$w_length = strlen(cmd);
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cdsc.dsc$b_dtype = DSC$K_DTYPE_T;
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cdsc.dsc$b_class = DSC$K_CLASS_S;
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cdscp = &cdsc;
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}
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status = LIB$SPAWN(cdscp, 0, 0, 0, 0, 0, &substatus, 0, 0, 0);
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if (status != SS$_NORMAL)
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substatus = status;
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status = SYS$QIOW(EFN, iochan, IO$_SETMODE, iosb, 0, 0,
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newmode, sizeof(newmode), 0, 0, 0, 0);
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if (status != SS$_NORMAL || (iosb[0] & 0xFFFF) != SS$_NORMAL)
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return FALSE;
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if ((substatus & STS$M_SUCCESS) == 0) /* Command failed. */
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return FALSE;
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return TRUE;
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}
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#endif
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#if MSDOS & (TURBO | MSC)
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/*
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* SHELLPROG: Execute a command in a subshell
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*
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* char *cmd; Incoming command line to execute
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*/
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int shellprog(char *cmd)
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{
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char *shell; /* Name of system command processor */
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char *p; /* Temporary pointer */
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char swchar; /* switch character to use */
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union REGS regs; /* parameters for dos call */
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char comline[NSTRING]; /* constructed command line */
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/* detect current switch character and set us up to use it */
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regs.h.ah = 0x37; /* get setting data */
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regs.h.al = 0x00; /* get switch character */
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intdos(®s, ®s);
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swchar = (char) regs.h.dl;
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/* get name of system shell */
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if ((shell = getenv("COMSPEC")) == NULL) {
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return FALSE; /* No shell located */
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}
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/* trim leading whitespace off the command */
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while (*cmd == ' ' || *cmd == '\t') /* find out if null command */
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cmd++;
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/** If the command line is not empty, bring up the shell **/
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/** and execute the command. Otherwise, bring up the **/
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/** shell in interactive mode. **/
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if (*cmd) {
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strcpy(comline, shell);
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strcat(comline, " ");
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comline[strlen(comline) + 1] = 0;
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comline[strlen(comline)] = swchar;
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strcat(comline, "c ");
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strcat(comline, cmd);
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return execprog(comline);
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} else
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return execprog(shell);
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}
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/*
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* EXECPROG:
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* A function to execute a named program
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* with arguments
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*
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* char *cmd; Incoming command line to execute
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*/
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int execprog(char *cmd)
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{
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char *sp; /* temporary string pointer */
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char f1[38]; /* FCB1 area (not initialized */
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char f2[38]; /* FCB2 area (not initialized */
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char prog[NSTRING]; /* program filespec */
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char tail[NSTRING]; /* command tail with length byte */
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union REGS regs; /* parameters for dos call */
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struct SREGS segreg; /* segment registers for dis call */
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struct pblock { /* EXEC parameter block */
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short envptr; /* 2 byte pointer to environment string */
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char *cline; /* 4 byte pointer to command line */
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char *fcb1; /* 4 byte pointer to FCB at PSP+5Ch */
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char *fcb2; /* 4 byte pointer to FCB at PSP+6Ch */
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} pblock;
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char *flook();
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/* parse the command name from the command line */
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sp = prog;
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while (*cmd && (*cmd != ' ') && (*cmd != '\t'))
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*sp++ = *cmd++;
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*sp = 0;
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/* and parse out the command tail */
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while (*cmd && ((*cmd == ' ') || (*cmd == '\t')))
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++cmd;
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*tail = (char) (strlen(cmd)); /* record the byte length */
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strcpy(&tail[1], cmd);
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strcat(&tail[1], "\r");
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/* look up the program on the path trying various extentions */
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if ((sp = flook(prog, TRUE)) == NULL)
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if ((sp = flook(strcat(prog, ".exe"), TRUE)) == NULL) {
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strcpy(&prog[strlen(prog) - 4], ".com");
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if ((sp = flook(prog, TRUE)) == NULL)
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return FALSE;
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}
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strcpy(prog, sp);
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/* get a pointer to this PSPs environment segment number */
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segread(&segreg);
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/* set up the EXEC parameter block */
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pblock.envptr = 0; /* make the child inherit the parents env */
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pblock.fcb1 = f1; /* point to a blank FCB */
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pblock.fcb2 = f2; /* point to a blank FCB */
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pblock.cline = tail; /* parameter line pointer */
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/* and make the call */
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regs.h.ah = 0x4b; /* EXEC Load or Execute a Program */
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regs.h.al = 0x00; /* load end execute function subcode */
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segreg.ds = ((unsigned long) (prog) >> 16); /* program name ptr */
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regs.x.dx = (unsigned int) (prog);
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segreg.es = ((unsigned long) (&pblock) >> 16); /* set up param block ptr */
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regs.x.bx = (unsigned int) (&pblock);
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#if TURBO | MSC
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intdosx(®s, ®s, &segreg);
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if (regs.x.cflag == 0) {
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regs.h.ah = 0x4d; /* get child process return code */
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intdos(®s, ®s); /* go do it */
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rval = regs.x.ax; /* save child's return code */
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} else
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#if MSC
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rval = -1;
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#else
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rval = -_doserrno; /* failed child call */
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#endif
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#endif
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return (rval < 0) ? FALSE : TRUE;
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}
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#endif
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