Major changes to the DOS/djgpp port (including threading):

	Subject: Re: dos-djgpp port not in perl 5.004_54

p4raw-id: //depot/perl@373

1 files changed, 490 insertions, 0 deletions

diff --git a/djgpp/djgpp.c b/djgpp/djgpp.c
new file mode 100644
index 0000000000..578a1f9bd7
--- /dev/null
+++ b/djgpp/djgpp.c
@@ -0,0 +1,490 @@
+#include <libc/stubs.h>
+#include <io.h>
+#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <libc/file.h>
+#include <process.h>
+#include <fcntl.h>
+#include <glob.h>
+#include <sys/fsext.h>
+#include <crt0.h>
+#include "EXTERN.h"
+#include "perl.h"
+#include "XSUB.h"
+
+#if DJGPP==2 && DJGPP_MINOR<2
+
+/* XXX I should rewrite this stuff someday. ML */
+
+/* This is from popen.c */
+
+/* Copyright (C) 1997 DJ Delorie, see COPYING.DJ for details */
+/* Copyright (C) 1996 DJ Delorie, see COPYING.DJ for details */
+/* Copyright (C) 1995 DJ Delorie, see COPYING.DJ for details */
+
+/* hold file pointer, descriptor, command, mode, temporary file name,
+   and the status of the command  */
+struct pipe_list {
+  FILE *fp;
+  int fd;
+  int exit_status;
+  char *command, mode[10], temp_name[L_tmpnam];
+  struct pipe_list *next;
+};
+
+/* static, global list pointer */
+static struct pipe_list *pl = NULL;
+
+FILE *
+popen (const char *cm, const char *md) /* program name, pipe mode */
+{
+  struct pipe_list *l1;
+
+  /* make new node */
+  if ((l1 = (struct pipe_list *) malloc (sizeof (struct pipe_list))) == NULL)
+    return NULL;
+
+  /* zero out elements to we'll get here */
+  l1->fp = NULL;
+  l1->next = pl;
+  pl = l1;
+
+  /* stick in elements we know already */
+  l1->exit_status = -1;
+  strcpy (l1->mode, md);
+  if (tmpnam (l1->temp_name) == NULL)
+    return NULL;
+
+  /* if can save the program name, build temp file */
+  if ((l1->command = malloc(strlen(cm)+1)))
+  {
+    strcpy(l1->command, cm);
+    /* if caller wants to read */
+    if (l1->mode[0] == 'r')
+    {
+      /* dup stdout */
+      if ((l1->fd = dup (fileno (stdout))) == EOF)
+	l1->fp = NULL;
+      else if (!(l1->fp = freopen (l1->temp_name, "wb", stdout)))
+	l1->fp = NULL;
+      else
+	/* exec cmd */
+      {
+        if ((l1->exit_status = system (cm)) == EOF)
+          l1->fp = NULL;
+      }
+      /* reopen real stdout */
+      if (dup2 (l1->fd, fileno (stdout)) == EOF)
+	l1->fp = NULL;
+      else
+	/* open file for reader */
+	l1->fp = fopen (l1->temp_name, l1->mode);
+      close(l1->fd);
+    }
+    else
+      /* if caller wants to write */
+      if (l1->mode[0] == 'w')
+        /* open temp file */
+        l1->fp = fopen (l1->temp_name, l1->mode);
+      else
+        /* unknown mode */
+        l1->fp = NULL;
+  }
+  return l1->fp;              /* return == NULL ? ERROR : OK */
+}
+
+int
+pclose (FILE *pp)
+{
+  struct pipe_list *l1, *l2;    /* list pointers */
+  int retval=0;			/* function return value */
+
+  /* if pointer is first node */
+  if (pl->fp == pp)
+  {
+    /* save node and take it out the list */
+    l1 = pl;
+    pl = l1->next;
+  }
+  else
+    /* if more than one node in list */
+    if (pl->next)
+    {
+      /* find right node */
+      for (l2 = pl, l1 = pl->next; l1; l2 = l1, l1 = l2->next)
+        if (l1->fp == pp)
+          break;
+
+      /* take node out of list */
+      l2->next = l1->next;
+    }
+    else
+      return -1;
+
+  /* if FILE not in list - return error */
+  if (l1->fp == pp)
+  {
+    /* close the (hopefully) popen()ed file */
+    fclose (l1->fp);
+
+    /* if pipe was opened to write */
+    if (l1->mode[0] == 'w')
+    {
+      /* dup stdin */
+      if ((l1->fd = dup (fileno (stdin))) == EOF)
+	retval = -1;
+      else
+	/* open temp stdin */
+	if (!(l1->fp = freopen (l1->temp_name, "rb", stdin)))
+	  retval = -1;
+	else
+	  /* exec cmd */
+          if ((retval = system (l1->command)) != EOF)
+	  {
+            /* reopen stdin */
+	    if (dup2 (l1->fd, fileno (stdin)) == EOF)
+	      retval = -1;
+	  }
+      close(l1->fd);
+    }
+    else
+      /* if pipe was opened to read, return the exit status we saved */
+      if (l1->mode[0] == 'r')
+        retval = l1->exit_status;
+      else
+        /* invalid mode */
+        retval = -1;
+  }
+  remove (l1->temp_name);       /* remove temporary file */
+  free (l1->command);           /* dealloc memory */
+  free (l1);                    /* dealloc memory */
+
+  return retval;              /* retval==0 ? OK : ERROR */
+}
+
+#endif
+
+/**/
+
+#define EXECF_SPAWN 0
+#define EXECF_EXEC 1
+
+static int
+convretcode (int rc,char *prog,int fl)
+{
+    if (rc < 0 && dowarn)
+        warn ("Can't %s \"%s\": %s",fl ? "exec" : "spawn",prog,Strerror (errno));
+    if (rc > 0)
+        return rc <<= 8;
+    if (rc < 0)
+        return 255 << 8;
+    return 0;
+}
+
+int
+do_aspawn (SV *really,SV **mark,SV **sp)
+{
+    dTHR;
+    int  rc;
+    char **a,*tmps,**argv; 
+
+    if (sp<=mark)
+        return -1;
+    a=argv=(char**) alloca ((sp-mark+3)*sizeof (char*));
+
+    while (++mark <= sp)
+        if (*mark)
+            *a++ = SvPVx(*mark, na);
+        else
+            *a++ = "";
+    *a = Nullch;
+
+    if (argv[0][0] != '/' && argv[0][0] != '\\'
+        && !(argv[0][0] && argv[0][1] == ':'
+        && (argv[0][2] == '/' || argv[0][2] != '\\'))
+     ) /* will swawnvp use PATH? */
+         TAINT_ENV();	/* testing IFS here is overkill, probably */
+
+    if (really && *(tmps = SvPV(really, na)))
+        rc=spawnvp (P_WAIT,tmps,argv);
+    else
+        rc=spawnvp (P_WAIT,argv[0],argv);
+
+    return convretcode (rc,argv[0],EXECF_SPAWN);
+}
+
+#define EXTRA "\x00\x00\x00\x00\x00\x00"
+
+int
+do_spawn2 (char *cmd,int execf)
+{
+    char **a,*s,*shell,*metachars;
+    int  rc,unixysh;
+
+    if ((shell=getenv("SHELL"))==NULL && (shell=getenv("COMSPEC"))==NULL)
+    	shell="c:\\command.com" EXTRA;
+
+    unixysh=_is_unixy_shell (shell);
+    metachars=unixysh ? "$&*(){}[]'\";\\?>|<~`\n" EXTRA : "*?[|<>\"\\" EXTRA;
+
+    while (*cmd && isSPACE(*cmd))
+	cmd++;
+
+    if (strnEQ (cmd,"/bin/sh",7) && isSPACE (cmd[7]))
+        cmd+=5;
+
+    /* save an extra exec if possible */
+    /* see if there are shell metacharacters in it */
+    if (strstr (cmd,"..."))
+        goto doshell;
+    if (unixysh)
+    {
+        if (*cmd=='.' && isSPACE (cmd[1]))
+            goto doshell;
+        if (strnEQ (cmd,"exec",4) && isSPACE (cmd[4]))
+            goto doshell;
+        for (s=cmd; *s && isALPHA (*s); s++) ;	/* catch VAR=val gizmo */
+            if (*s=='=')
+                goto doshell;
+    }
+    for (s=cmd; *s; s++)
+	if (strchr (metachars,*s))
+	{
+	    if (*s=='\n' && s[1]=='\0')
+	    {
+		*s='\0';
+		break;
+	    }
+doshell:
+	    if (execf==EXECF_EXEC)
+                return convretcode (execl (shell,shell,unixysh ? "-c" : "/c",cmd,NULL),cmd,execf);
+            return convretcode (system (cmd),cmd,execf);
+	}
+
+    New (1303,Argv,(s-cmd)/2+2,char*);
+    Cmd=savepvn (cmd,s-cmd);
+    a=Argv;
+    for (s=Cmd; *s;) {
+	while (*s && isSPACE (*s)) s++;
+	if (*s)
+	    *(a++)=s;
+	while (*s && !isSPACE (*s)) s++;
+	if (*s)
+	    *s++='\0';
+    }
+    *a=Nullch;
+    if (!Argv[0])
+        return -1;
+
+    if (execf==EXECF_EXEC)
+        rc=execvp (Argv[0],Argv);
+    else
+        rc=spawnvp (P_WAIT,Argv[0],Argv);
+    return convretcode (rc,Argv[0],execf);
+}
+
+int
+do_spawn (char *cmd)
+{
+    return do_spawn2 (cmd,EXECF_SPAWN);
+}
+
+bool
+do_exec (char *cmd)
+{
+    do_spawn2 (cmd,EXECF_EXEC);
+    return FALSE;
+}
+
+/**/
+
+struct globinfo
+{
+    int    fd;
+    char   *matches;
+    size_t size;
+};
+
+#define MAXOPENGLOBS 10
+
+static struct globinfo myglobs[MAXOPENGLOBS];
+
+static struct globinfo *
+searchfd (int fd)
+{
+    int ic;
+    for (ic=0; ic<MAXOPENGLOBS; ic++)
+        if (myglobs[ic].fd==fd)
+            return myglobs+ic;
+    return NULL;
+}
+
+static int
+glob_handler (__FSEXT_Fnumber n,int *rv,va_list args)
+{
+    unsigned ic;
+    struct globinfo *gi;
+    switch (n)
+    {
+        case __FSEXT_open:
+        {
+            char   *p1,*pattern,*name=va_arg (args,char*);
+            STRLEN len;
+            glob_t pglob;
+
+            if (strnNE (name,"/dev/dosglob/",13))
+                break;
+            if ((gi=searchfd (-1)) == NULL)
+                break;
+
+            pattern=alloca (strlen (name+=13)+1);
+            strcpy (pattern,name);
+            if (!_USE_LFN)
+                strlwr (pattern);
+            ic=pglob.gl_pathc=0;
+            pglob.gl_pathv=NULL;
+            while (pattern)
+            {
+                if ((p1=strchr (pattern,' '))!=NULL)
+                    *p1=0;
+                glob (pattern,ic,0,&pglob);
+                ic=GLOB_APPEND;
+                if ((pattern=p1)!=NULL)
+                    pattern++;
+            }
+            for (ic=len=0; ic<pglob.gl_pathc; ic++)
+                len+=1+strlen (pglob.gl_pathv[ic]);
+            if (len)
+            {
+                if ((gi->matches=p1=(char*) malloc (gi->size=len))==NULL)
+                    break;
+                for (ic=0; ic<pglob.gl_pathc; ic++)
+                {
+                    strcpy (p1,pglob.gl_pathv[ic]);
+                    p1+=strlen (p1)+1;
+                }
+            }
+            else
+            {
+                if ((gi->matches=strdup (name))==NULL)
+                    break;
+                gi->size=strlen (name)+1;
+            }
+            globfree (&pglob);
+            gi->fd=*rv=__FSEXT_alloc_fd (glob_handler);
+            return 1;
+        }
+        case __FSEXT_read:
+        {
+            int      fd=va_arg (args,int);
+            char   *buf=va_arg (args,char*);
+            size_t  siz=va_arg (args,size_t);
+
+            if ((gi=searchfd (fd))==NULL)
+                break;
+
+            ic=tell (fd);
+            if (siz+ic>=gi->size)
+                siz=gi->size-ic;
+            memcpy (buf,ic+gi->matches,siz);
+            lseek (fd,siz,1);
+            *rv=siz;
+            return 1;
+        }
+        case __FSEXT_close:
+        {
+            int fd=va_arg (args,int);
+
+            if ((gi=searchfd (fd))==NULL)
+                break;
+            free (gi->matches);
+            gi->fd=-1;
+            break;
+        }
+        default:
+            break;
+    }
+    return 0;
+}
+
+static
+XS(dos_GetCwd)
+{
+    dXSARGS;
+
+    if (items)
+        croak ("Usage: Dos::GetCwd()");
+    {
+        char tmp[PATH_MAX+2];
+        ST(0)=sv_newmortal ();
+        if (getcwd (tmp,PATH_MAX+1)!=NULL)
+            sv_setpv ((SV*)ST(0),tmp);
+    }
+    XSRETURN (1);
+}
+
+static
+XS(dos_UseLFN)
+{
+    dXSARGS;
+    XSRETURN_IV (_USE_LFN);
+}
+
+void
+init_os_extras()
+{
+    char *file = __FILE__;
+
+    dXSUB_SYS;
+    
+    newXS ("Dos::GetCwd",dos_GetCwd,file);
+    newXS ("Dos::UseLFN",dos_UseLFN,file);
+
+    /* install my File System Extension for globbing */
+    __FSEXT_add_open_handler (glob_handler);
+    memset (myglobs,-1,sizeof (myglobs));
+}
+
+static char *perlprefix;
+
+#define PERL5 "/perl5"
+
+char *djgpp_pathexp (const char *p)
+{
+    static char expp[PATH_MAX];
+    strcpy (expp,perlprefix);
+    switch (p[0])
+    {
+        case 'B':
+            strcat (expp,"/bin");
+            break;
+        case 'S':
+            strcat (expp,"/lib" PERL5 "/site");
+            break;
+        default:
+            strcat (expp,"/lib" PERL5);
+            break;
+    }
+    return expp;
+}
+
+void
+Perl_DJGPP_init (int *argcp,char ***argvp)
+{
+    char *p;
+
+    perlprefix=strdup (**argvp);
+    strlwr (perlprefix);
+    if ((p=strrchr (perlprefix,'/'))!=NULL)
+    {
+        *p=0;
+        if (strEQ (p-4,"/bin"))
+            p[-4]=0;
+    }
+    else
+        strcpy (perlprefix,"..");
+}
+