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217 lines
4 KiB
C
217 lines
4 KiB
C
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/*
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* REDIR.C - redirection handling.
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*
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*
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* History:
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*
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* 12/15/95 (Tim Norman)
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* started.
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*
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* 12 Jul 98 (Hans B Pufal)
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* Rewrote to make more efficient and to conform to new command.c
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* and batch.c processing.
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*
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* 27-Jul-1998 (John P Price <linux-guru@gcfl.net>)
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* Added config.h include
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*
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* 22-Jan-1999 (Eric Kohl <ekohl@abo.rhein-zeitung.de>)
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* Unicode safe!
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* Added new error redirection "2>" and "2>>".
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*
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* 26-Jan-1999 (Eric Kohl <ekohl@abo.rhein-zeitung.de>)
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* Added new error AND output redirection "&>" and "&>>".
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*/
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#include "config.h"
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#ifdef FEATURE_REDIRECTION
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#include <windows.h>
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#include <tchar.h>
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#include <string.h>
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#include <ctype.h>
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#include "cmd.h"
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static BOOL
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IsRedirection (TCHAR c)
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{
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return (c == _T('<')) || (c == _T('>')) || (c == _T('|'));
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}
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/*
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* Gets the redirection info from the command line and copies the
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* file names into ifn, ofn and efn removing them from the command
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* line.
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*
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* Converts remaining command line into a series of null terminated
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* strings defined by the pipe char '|'. Each string corresponds
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* to a single executable command. A double null terminates the
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* command strings.
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*
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* Return number of command strings found.
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*
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*/
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INT GetRedirection (LPTSTR s, LPTSTR ifn, LPTSTR ofn, LPTSTR efn, LPINT lpnFlags)
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{
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INT num = 1;
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LPTSTR dp = s;
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LPTSTR sp = s;
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/* find and remove all the redirections first */
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while (*sp)
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{
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if ((*sp == _T('"')) || (*sp == _T('\'')))
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{
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/* No redirects inside quotes */
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TCHAR qc = *sp;
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do
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*dp++ = *sp++;
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while (*sp != qc);
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*dp++ = *sp++;
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}
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else if ((*sp == _T('<')) || (*sp == _T('>')) ||
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(*sp == _T('2')) || (*sp == _T('&')))
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{
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/* MS-DOS ignores multiple redirection symbols and uses the last */
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/* redirection, so we'll emulate that and not check */
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if (*sp == _T('<'))
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{
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/* input redirection */
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*lpnFlags |= INPUT_REDIRECTION;
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while (_istspace (*sp))
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sp++;
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/* copy file name */
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while (*sp && !IsRedirection (*sp) && !_istspace (*sp))
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*ifn++ = *sp++;
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*ifn = _T('\0');
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}
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else if (*sp == _T('>'))
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{
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/* output redirection */
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*lpnFlags |= OUTPUT_REDIRECTION;
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sp++;
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/* append request ? */
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if (*sp == _T('>'))
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{
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*lpnFlags |= OUTPUT_APPEND;
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sp++;
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}
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while (_istspace (*sp))
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sp++;
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/* copy file name */
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while (*sp && !IsRedirection (*sp) && !_istspace (*sp))
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*ofn++ = *sp++;
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*ofn = _T('\0');
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}
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else if (*sp == _T('2'))
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{
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/* error redirection */
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sp++;
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if (*sp == _T('>'))
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{
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*lpnFlags |= ERROR_REDIRECTION;
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sp++;
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/* append request ? */
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if (*sp == _T('>'))
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{
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*lpnFlags |= ERROR_APPEND;
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sp++;
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}
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}
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else
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{
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/* no redirection!! copy the '2' character! */
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sp--;
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*dp++ = *sp++;
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continue;
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}
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while (_istspace (*sp))
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sp++;
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/* copy file name */
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while (*sp && !IsRedirection (*sp) && !_istspace (*sp))
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*efn++ = *sp++;
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*efn = _T('\0');
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}
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else if (*sp == _T('&'))
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{
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/* output AND error redirection */
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sp++;
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if (*sp == _T('>'))
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{
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*lpnFlags |= (ERROR_REDIRECTION | OUTPUT_REDIRECTION);
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sp++;
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/* append request ? */
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if (*sp == _T('>'))
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{
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*lpnFlags |= (ERROR_APPEND | OUTPUT_APPEND);
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sp++;
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}
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}
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else
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{
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/* no redirection!! copy the '&' character! */
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sp--;
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*dp++ = *sp++;
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continue;
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}
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while (_istspace (*sp))
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sp++;
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/* copy file name */
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while (*sp && !IsRedirection (*sp) && !_istspace (*sp))
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*ofn++ = *efn++ = *sp++;
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*ofn = *efn = _T('\0');
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}
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}
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else
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*dp++ = *sp++;
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}
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*dp++ = _T('\0');
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*dp = _T('\0');
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/* now go for the pipes */
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sp = s;
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while (*sp)
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{
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if ((*sp == _T('"')) || (*sp == _T('\'')))
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{
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TCHAR qc = *sp;
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do
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sp++;
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while (*sp != qc);
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sp++;
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}
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else if (*sp == _T('|'))
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{
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*sp++ = '\0';
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num++;
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}
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else
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sp++;
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}
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return num;
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}
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#endif /* FEATURE_REDIRECTION */
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