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- /***********************************************************
- Copyright 1991, 1992, 1993, 1994 by Stichting Mathematisch Centrum,
- Amsterdam, The Netherlands.
-
- All Rights Reserved
-
- Permission to use, copy, modify, and distribute this software and its
- documentation for any purpose and without fee is hereby granted,
- provided that the above copyright notice appear in all copies and that
- both that copyright notice and this permission notice appear in
- supporting documentation, and that the names of Stichting Mathematisch
- Centrum or CWI not be used in advertising or publicity pertaining to
- distribution of the software without specific, written prior permission.
-
- STICHTING MATHEMATISCH CENTRUM DISCLAIMS ALL WARRANTIES WITH REGARD TO
- THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
- FITNESS, IN NO EVENT SHALL STICHTING MATHEMATISCH CENTRUM BE LIABLE
- FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
- WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
- ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
- OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
-
- ******************************************************************/
-
- /* Two PD getcwd() implementations.
- Author: Guido van Rossum, CWI Amsterdam, Jan 1991, <guido@cwi.nl>. */
-
- #include <stdio.h>
- #include <errno.h>
-
- #ifdef HAVE_GETWD
-
- /* Version for BSD systems -- use getwd() */
-
- #ifdef HAVE_SYS_PARAM_H
- #include <sys/param.h>
- #endif
-
- #ifndef MAXPATHLEN
- #define MAXPATHLEN 1024
- #endif
-
- extern char *getwd();
-
- char *
- getcwd(buf, size)
- char *buf;
- int size;
- {
- char localbuf[MAXPATHLEN+1];
- char *ret;
-
- if (size <= 0) {
- errno = EINVAL;
- return NULL;
- }
- ret = getwd(localbuf);
- if (ret != NULL && strlen(localbuf) >= size) {
- errno = ERANGE;
- return NULL;
- }
- if (ret == NULL) {
- errno = EACCES; /* Most likely error */
- return NULL;
- }
- strncpy(buf, localbuf, size);
- return buf;
- }
-
- #else /* !HAVE_GETWD */
-
- /* Version for really old UNIX systems -- use pipe from pwd */
-
- #ifndef PWD_CMD
- #define PWD_CMD "/bin/pwd"
- #endif
-
- char *
- getcwd(buf, size)
- char *buf;
- int size;
- {
- FILE *fp;
- char *p;
- int sts;
- if (size <= 0) {
- errno = EINVAL;
- return NULL;
- }
- if ((fp = popen(PWD_CMD, "r")) == NULL)
- return NULL;
- if (fgets(buf, size, fp) == NULL || (sts = pclose(fp)) != 0) {
- errno = EACCES; /* Most likely error */
- return NULL;
- }
- for (p = buf; *p != '\n'; p++) {
- if (*p == '\0') {
- errno = ERANGE;
- return NULL;
- }
- }
- *p = '\0';
- return buf;
- }
-
- #endif /* !HAVE_GETWD */
-