89 lines
1.9 KiB
C
89 lines
1.9 KiB
C
/* zmapfd - read contents of file descriptor into a newly-allocated buffer */
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/* Copyright (C) 2006 Free Software Foundation, Inc.
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This file is part of GNU Bash, the Bourne Again SHell.
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Bash is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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Bash is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with Bash. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <config.h>
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#include <sys/types.h>
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#if defined (HAVE_UNISTD_H)
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# include <unistd.h>
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#endif
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#include <errno.h>
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#include "bashansi.h"
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#include "command.h"
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#include "general.h"
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#if !defined (errno)
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extern int errno;
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#endif
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extern ssize_t zread __P((int, char *, size_t));
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/* Dump contents of file descriptor FD to *OSTR. FN is the filename for
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error messages (not used right now). */
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int
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zmapfd (fd, ostr, fn)
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int fd;
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char **ostr;
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char *fn;
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{
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ssize_t nr;
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int rval;
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char lbuf[128];
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char *result;
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int rsize, rind;
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rval = 0;
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result = (char *)xmalloc (rsize = 64);
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rind = 0;
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while (1)
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{
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nr = zread (fd, lbuf, sizeof (lbuf));
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if (nr == 0)
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{
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rval = rind;
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break;
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}
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else if (nr < 0)
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{
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free (result);
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if (ostr)
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*ostr = (char *)NULL;
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return -1;
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}
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RESIZE_MALLOCED_BUFFER (result, rind, nr, rsize, 128);
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memcpy (result+rind, lbuf, nr);
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rind += nr;
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}
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RESIZE_MALLOCED_BUFFER (result, rind, 1, rsize, 128);
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result[rind] = '\0';
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if (ostr)
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*ostr = result;
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else
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free (result);
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return rval;
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}
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