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Almathera Ten Pack 2: CDPD 1
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Almathera Ten on Ten - Disc 2: CDPD 1.iso
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001-025
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002
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microemacs
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spawn.c
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C/C++ Source or Header
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1995-03-13
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7KB
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224 lines
/*
* The routines in this file are called to create a subjob running a command
* interpreter. This code is a big fat nothing on CP/M-86. You lose.
*/
#include <stdio.h>
#include "ed.h"
#if AMIGA
#define NEW 1006
#endif
#if VMS
#define EFN 0 /* Event flag. */
#include <ssdef.h> /* Random headers. */
#include <stsdef.h>
#include <descrip.h>
#include <iodef.h>
extern int oldmode[]; /* In "termio.c" */
extern int newmode[]; /* In "termio.c" */
extern short iochan; /* In "termio.c" */
#endif
#if MSDOS
#include <dos.h>
#endif
#if V7
#include <signal.h>
#endif
/*
* Create a subjob with a copy of the command intrepreter in it. When the
* command interpreter exits, mark the screen as garbage so that you do a full
* repaint. Bound to "C-C". The message at the start in VMS puts out a newline.
* Under some (unknown) condition, you don't get one free when DCL starts up.
*/
spawncli(f, n)
{
#if AMIGA
long newcli;
newcli = Open("CON:1/1/639/199/MicroEmacs Subprocess", NEW);
mlwrite("[Starting new CLI]");
sgarbf = TRUE;
Execute("", newcli, 0);
Close(newcli);
return(TRUE);
#endif
#if V7
register char *cp;
char *getenv();
#endif
#if VMS
movecursor(term.t_nrow, 0); /* In last line. */
mlputs("[Starting DCL]\r\n");
(*term.t_flush)(); /* Ignore "ttcol". */
sgarbf = TRUE;
return (sys(NULL)); /* NULL => DCL. */
#endif
#if CPM
mlwrite("Not in CP/M-86");
#endif
#if MSDOS
movecursor(term.t_nrow, 0); /* Seek to last line. */
(*term.t_flush)();
sys("\\command.com", ""); /* Run CLI. */
sgarbf = TRUE;
return(TRUE);
#endif
#if V7
movecursor(term.t_nrow, 0); /* Seek to last line. */
(*term.t_flush)();
ttclose(); /* stty to old settings */
if ((cp = getenv("SHELL")) != NULL && *cp != '\0')
system(cp);
else
system("exec /bin/sh");
sgarbf = TRUE;
sleep(2);
ttopen();
return(TRUE);
#endif
}
/*
* Run a one-liner in a subjob. When the command returns, wait for a single
* character to be typed, then mark the screen as garbage so a full repaint is
* done. Bound to "C-X !".
*/
spawn(f, n)
{
register int s;
char line[NLINE];
#if AMIGA
long newcli;
newcli = Open("CON:1/1/639/199/MicroEmacs Subprocess", NEW);
if ((s=mlreply("CLI command: ", line, NLINE)) != TRUE)
return (s);
Execute(line,0,newcli);
Close(newcli);
while ((*term.t_getchar)() != '\r') /* Pause. */
;
sgarbf = TRUE;
return(TRUE);
#endif
#if VMS
if ((s=mlreply("DCL command: ", line, NLINE)) != TRUE)
return (s);
(*term.t_putchar)('\n'); /* Already have '\r' */
(*term.t_flush)();
s = sys(line); /* Run the command. */
mlputs("\r\n\n[End]"); /* Pause. */
(*term.t_flush)();
while ((*term.t_getchar)() != '\r')
;
sgarbf = TRUE;
return (s);
#endif
#if CPM
mlwrite("Not in CP/M-86");
return (FALSE);
#endif
#if MSDOS
if ((s=mlreply("MS-DOS command: ", line, NLINE)) != TRUE)
return (s);
system(line);
while ((*term.t_getchar)() != '\r') /* Pause. */
;
sgarbf = TRUE;
return (TRUE);
#endif
#if V7
if ((s=mlreply("! ", line, NLINE)) != TRUE)
return (s);
(*term.t_putchar)('\n'); /* Already have '\r' */
(*term.t_flush)();
ttclose(); /* stty to old modes */
system(line);
sleep(2);
ttopen();
mlputs("[End]"); /* Pause. */
(*term.t_flush)();
while ((s = (*term.t_getchar)()) != '\r' && s != ' ')
;
sgarbf = TRUE;
return (TRUE);
#endif
}
#if VMS
/*
* Run a command. The "cmd" is a pointer to a command string, or NULL if you
* want to run a copy of DCL in the subjob (this is how the standard routine
* LIB$SPAWN works. You have to do wierd stuff with the terminal on the way in
* and the way out, because DCL does not want the channel to be in raw mode.
*/
sys(cmd)
register char *cmd;
{
struct dsc$descriptor cdsc;
struct dsc$descriptor *cdscp;
long status;
long substatus;
long iosb[2];
status = SYS$QIOW(EFN, iochan, IO$_SETMODE, iosb, 0, 0,
oldmode, sizeof(oldmode), 0, 0, 0, 0);
if (status!=SS$_NORMAL || (iosb[0]&0xFFFF)!=SS$_NORMAL)
return (FALSE);
cdscp = NULL; /* Assume DCL. */
if (cmd != NULL) { /* Build descriptor. */
cdsc.dsc$a_pointer = cmd;
cdsc.dsc$w_length = strlen(cmd);
cdsc.dsc$b_dtype = DSC$K_DTYPE_T;
cdsc.dsc$b_class = DSC$K_CLASS_S;
cdscp = &cdsc;
}
status = LIB$SPAWN(cdscp, 0, 0, 0, 0, 0, &substatus, 0, 0, 0);
if (status != SS$_NORMAL)
substatus = status;
status = SYS$QIOW(EFN, iochan, IO$_SETMODE, iosb, 0, 0,
newmode, sizeof(newmode), 0, 0, 0, 0);
if (status!=SS$_NORMAL || (iosb[0]&0xFFFF)!=SS$_NORMAL)
return (FALSE);
if ((substatus&STS$M_SUCCESS) == 0) /* Command failed. */
return (FALSE);
return (TRUE);
}
#endif
#if MSDOS
/*
* This routine, once again by Bob McNamara, is a C translation of the "system"
* routine in the MWC-86 run time library. It differs from the "system" routine
* in that it does not unconditionally append the string ".exe" to the end of
* the command name. We needed to do this because we want to be able to spawn
* off "command.com". We really do not understand what it does, but if you don't
* do it exactly "malloc" starts doing very very strange things.
*/
sys(cmd, tail)
char *cmd;
char *tail;
{
#if MWC_86
register unsigned n;
extern char *__end;
n = __end + 15;
n >>= 4;
n = ((n + dsreg() + 16) & 0xFFF0) + 16;
return(execall(cmd, tail, n));
#endif
#if LATTICE
return forklp(cmd, tail, NULL);
#endif
}
#endif