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* getcwd.c (getcwd): If pathname is NULL, then obtain SIZE
bytes of space using malloc.
From-SVN: r27161
65 lines
1.2 KiB
C
65 lines
1.2 KiB
C
/* Emulate getcwd using getwd.
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This function is in the public domain. */
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/*
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NAME
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getcwd -- get absolute pathname for current working directory
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SYNOPSIS
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char *getcwd (char pathname[len], len)
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DESCRIPTION
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Copy the absolute pathname for the current working directory into
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the supplied buffer and return a pointer to the buffer. If the
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current directory's path doesn't fit in LEN characters, the result
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is NULL and errno is set.
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If pathname is a null pointer, getcwd() will obtain size bytes of
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space using malloc.
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BUGS
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Emulated via the getwd() call, which is reasonable for most
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systems that do not have getcwd().
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*/
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#include "config.h"
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#ifdef HAVE_SYS_PARAM_H
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#include <sys/param.h>
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#endif
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#include <errno.h>
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extern char *getwd ();
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extern int errno;
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#ifndef MAXPATHLEN
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#define MAXPATHLEN 1024
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#endif
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char *
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getcwd (buf, len)
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char *buf;
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int len;
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{
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char ourbuf[MAXPATHLEN];
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char *result;
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result = getwd (ourbuf);
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if (result) {
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if (strlen (ourbuf) >= len) {
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errno = ERANGE;
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return 0;
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}
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if (!buf) {
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buf = (char*)malloc(len);
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if (!buf) {
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errno = ENOMEM;
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return 0;
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}
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}
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strcpy (buf, ourbuf);
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}
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return buf;
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}
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