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- /*
- * This file is part of ixemul.library for the Amiga.
- * Copyright (C) 1991, 1992 Markus M. Wild
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Library General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * Library General Public License for more details.
- *
- * You should have received a copy of the GNU Library General Public
- * License along with this library; if not, write to the Free
- * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- *
- * 22-jan-92 -mw- restore sigmask before calling system()
- */
-
- #define KERNEL
- #include "ixemul.h"
- #include <ctype.h>
- #include <sys/wait.h>
-
- #ifdef DEBUG
- #define DP(a) kprintf a
- #else
- #define DP(a)
- #endif
-
- #define NO_PROTOTYPES
- #include <libraries/arpbase.h> /* HAS! to be V39 or higher! */
- #undef NO_PROTOTYPES
-
- #define BASE_EXT_DECL
- #define BASE_PAR_DECL
- #define BASE_PAR_DECL0
- #define BASE_NAME ix.ix_arp_base
- #include <inline/arp.h>
-
- /* 2.0 support */
- #include "gcc:include20/utility/tagitem.h"
- #include "gcc:include20/dos/dostags.h"
- #define BASE_EXT_DECL
- #define BASE_PAR_DECL
- #define BASE_PAR_DECL0
- #define BASE_NAME ix.ix_dos_base
- __inline static LONG RunCommand(BASE_PAR_DECL BPTR seg, long int stack, UBYTE* paramptr, long int paramlen)
- {
- BASE_EXT_DECL
- register LONG res __asm("d0");
- register void *a6 __asm ("a6");
- register BPTR d1 __asm("d1");
- register long int d2 __asm("d2");
- register UBYTE* d3 __asm("d3");
- register long int d4 __asm("d4");
-
- a6 = BASE_NAME;
- d1 = seg;
- d2 = stack;
- d3 = paramptr;
- d4 = paramlen;
- __asm volatile ("
- jsr a6@(-0x1f8)"
- : "=r" (res)
- : "r" (a6), "r" (d1), "r" (d2), "r" (d3), "r" (d4)
- : "d0", "d1", "a0", "a1", "d2", "d3", "d4");
- return res;
- }
- #ifndef CMD_SYSTEM
- #define CMD_SYSTEM -1
- #define CMD_INTERNAL -2
-
- struct Segment {
- BPTR seg_Next;
- LONG seg_UC;
- BPTR seg_Seg;
- UBYTE seg_Name[4]; /* actually the first 4 chars of BSTR name */
- };
- #endif
- __inline static struct Segment* FindSegment(BASE_PAR_DECL UBYTE* name, struct Segment* seg, long int system)
- {
- BASE_EXT_DECL
- register struct Segment* res __asm("d0");
- register void *a6 __asm ("a6");
- register UBYTE* d1 __asm("d1");
- register struct Segment* d2 __asm("d2");
- register long int d3 __asm("d3");
-
- a6 = BASE_NAME;
- d1 = name;
- d2 = seg;
- d3 = system;
- __asm volatile ("
- jsr a6@(-0x30c)"
- : "=r" (res)
- : "r" (a6), "r" (d1), "r" (d2), "r" (d3)
- : "d0", "d1", "a0", "a1", "d2", "d3");
- return res;
- }
-
- extern int _dos20; /* set in crt0.c */
-
- #if __GNUC__ != 2
- #define alloca __builtin_alloca
- #endif
-
- extern BPTR __load_seg (char *name, char **args, BPTR *interp_lock);
-
- int
- ssystem(char *argline)
- {
- int rc, err = 0;
- UBYTE *arg, *index();
- UBYTE *tmp;
- int stack_size;
- struct CommandLineInterface *CLI;
- struct Process *me;
- int omask;
-
- omask = syscall (SYS_sigsetmask, ~0);
- me = (struct Process *)FindTask(0);
- CLI = BTOCPTR (me->pr_CLI);
- stack_size = CLI ? CLI->cli_DefaultStack * 4 : me->pr_StackSize;
- if (stack_size <= 4096) stack_size = 250000;
-
- /* the +1 is to get a cheap way to transform this into a BSTR */
- tmp = alloca (strlen (argline) + 6);
- tmp = LONG_ALIGN (tmp);
- tmp++;
-
- strcpy (tmp, argline);
-
- while (*tmp == ' ' || *tmp == '\t') ++tmp;
- /* not needed with custom load-seg function */
- if (! _dos20)
- while (tmp[0] == '.' && tmp[1] == '/') tmp += 2;
-
- if (arg = index(tmp, ' ')) *arg++ = 0;
-
- if (! _dos20)
- {
- if (arg)
- {
- /* the following for BCPL pecularities.. */
- if (arg[strlen (arg) - 1] != '\n') strcat (arg, "\n");
- }
-
- /* no interpreter expansion here, but Arp runs much stabler than 2.0... */
- rc = SyncRun((char *)tmp, (char *)arg, 0, 0);
- err = __ioerr_to_errno (IoErr ());
- }
- else
- {
- BPTR segs;
- char *args;
- struct Segment *res_seg = 0;
-
- segs = __load_seg (tmp, &args, 0);
-
- /* check for special cookie */
- if (segs == (BPTR) -2)
- {
- syscall (SYS_sigsetmask, omask);
-
- /* let the shell do the dirty work ;-)) */
- return system (argline);
- }
-
- /* also check the resident list, for those that actually don't use rez... */
- if (! segs)
- {
- Forbid ();
- res_seg = FindSegment (tmp, 0, 0);
- if (res_seg)
- {
- /* strange they didn't provide a function for this... */
- if (res_seg->seg_UC >= 0)
- res_seg->seg_UC++;
- segs = res_seg->seg_Seg;
- args = 0;
- }
- Permit ();
- }
-
- if (segs)
- {
- char **name;
- char *orig;
- char *all_args;
-
- /* if __load_seg() set args to something, we have to rebuild our
- * command line, but really just in that case ;-))
- */
- if (args)
- {
- int force_quotes = 0;
-
- /* now this IS a horrible kludge.. but again, I *NEED* sksh
- * working, and it only works, if the argument to the -c
- * switch is passed quoted... So if the __load_seg code
- * decided, that this was such a special sksh-script, it
- * negates the *arg parameter... shudder...
- *
- * NOTE: This only works for command lines that contain no
- * quotes themselves... I don't escape the argument
- * line, I just put a pair of quotes around it!
- * The starting quote is already included in the args
- * string from __load_seg()...
- */
- if (((int)args) < 0)
- {
- force_quotes = 1;
- args = (char *) ((-(int)args));
- }
-
- /* make handling easier */
- if (! arg) arg = "";
-
- /* the command we build looks like:
- * <seg'd command> args arg
- */
-
- all_args = alloca (strlen (args) + 1 + strlen (arg) + 4);
- strcpy (all_args, args);
- if (*arg)
- {
- strcat (all_args, " ");
- strcat (all_args, arg);
- }
-
- if (force_quotes)
- strcat (all_args, "\""); /* no comment... */
- strcat (all_args, "\n"); /* neither, this insn't my kludge though.. */
-
- /* and finally reassign the commandline to arg */
- arg = all_args;
- /* if args was not "", we have to free it, it's from strdup() */
- if (*args) syscall (SYS_free, args);
- }
- else
- {
- /* even if we didn't get any arguments from the expander, we still
- * need to protect the original arguments ala BCPL ..
- * Remember that `arg' is a (large enough) alloca() string ;-) */
- if (arg)
- strcat (arg, "\n");
- else
- arg = "\n";
- }
-
- /*
- * Hack to always get the name of the currently executing program
- * in Xoper
- */
- if (CLI)
- {
- name = (char **) & CLI->cli_CommandName;
- orig = *name;
- /* that's why we incremented tmp before ;-)) */
- ((unsigned char *)tmp)[-1] = strlen (tmp);
- /* this is always odd (stack=even + 1), so will chop fine to BPTR */
- *name = (char *) ((long)tmp >> 2);
- }
- else
- {
- name = (char **) & me->pr_Task.tc_Node.ln_Name;
- orig = *name;
- *name = tmp;
- }
-
- DP(("RunCommand (.. arg = >%s<, len = %ld)\n", arg, strlen (arg)));
-
- rc = RunCommand (segs, stack_size, arg, strlen (arg));
-
- *name = orig;
- if (res_seg)
- {
- Forbid ();
- if (res_seg->seg_UC > 0)
- res_seg->seg_UC--;
- Permit ();
- }
- else
- UnLoadSeg (segs);
- }
- else
- {
- rc = 20;
-
- err = __ioerr_to_errno (IoErr ());
- }
- }
-
- syscall (SYS_sigsetmask, omask);
-
- if (rc > 128)
- errno = EINTR;
- else
- errno = err;
-
- return (rc >= 128) ? W_EXITCODE (0, rc & 0x7f) : W_EXITCODE (rc, 0);
- }
-