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-rw-r--r--lib/libc/gen/getcwd.c277
1 files changed, 0 insertions, 277 deletions
diff --git a/lib/libc/gen/getcwd.c b/lib/libc/gen/getcwd.c
deleted file mode 100644
index 344a418..0000000
--- a/lib/libc/gen/getcwd.c
+++ /dev/null
@@ -1,277 +0,0 @@
-/*
- * Copyright (c) 1989, 1991, 1993, 1995
- * The Regents of the University of California. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. All advertising materials mentioning features or use of this software
- * must display the following acknowledgement:
- * This product includes software developed by the University of
- * California, Berkeley and its contributors.
- * 4. Neither the name of the University nor the names of its contributors
- * may be used to endorse or promote products derived from this software
- * without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- */
-
-#if defined(LIBC_SCCS) && !defined(lint)
-static char sccsid[] = "@(#)getcwd.c 8.5 (Berkeley) 2/7/95";
-#endif /* LIBC_SCCS and not lint */
-
-#include <sys/param.h>
-#include <sys/stat.h>
-
-#include <dirent.h>
-#include <errno.h>
-#include <fcntl.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <unistd.h>
-#include <signal.h>
-
-#define ISDOT(dp) \
- (dp->d_name[0] == '.' && (dp->d_name[1] == '\0' || \
- (dp->d_name[1] == '.' && dp->d_name[2] == '\0')))
-
-static int have__getcwd = 1; /* 0 = no, 1 = perhaps, 2 = yes */
-
-char *
-getcwd(pt, size)
- char *pt;
- size_t size;
-{
- register struct dirent *dp;
- register DIR *dir = NULL;
- register dev_t dev;
- register ino_t ino;
- register int first;
- register char *bpt, *bup;
- struct stat s;
- dev_t root_dev;
- ino_t root_ino;
- size_t ptsize, upsize;
- int save_errno;
- char *ept, *eup, *up, c;
-
- /*
- * If no buffer specified by the user, allocate one as necessary.
- * If a buffer is specified, the size has to be non-zero. The path
- * is built from the end of the buffer backwards.
- */
- if (pt) {
- ptsize = 0;
- if (!size) {
- errno = EINVAL;
- return (NULL);
- }
- if (size == 1) {
- errno = ERANGE;
- return (NULL);
- }
- ept = pt + size;
- } else {
- if ((pt = malloc(ptsize = 1024 - 4)) == NULL)
- return (NULL);
- ept = pt + ptsize;
- }
- if (have__getcwd) {
- struct sigaction sa, osa;
- int sigsys_installed = 0;
- int ret;
-
- if (have__getcwd == 1) { /* unsure? */
- bzero(&sa, sizeof(sa));
- sa.sa_handler = SIG_IGN;
- if (sigaction(SIGSYS, &sa, &osa) >= 0)
- sigsys_installed = 1;
- }
- ret = __getcwd(pt, ept - pt);
- if (sigsys_installed == 1) {
- int oerrno = errno;
- sigaction(SIGSYS, &osa, NULL);
- errno = oerrno;
- }
- /* XXX a bogus syscall seems to return EINVAL(!) */
- if (ret < 0 && (errno == ENOSYS || errno == EINVAL))
- have__getcwd = 0;
- else if (have__getcwd == 1)
- have__getcwd = 2; /* yep, remember we have it */
- if (ret == 0) {
- if (*pt != '/') {
- bpt = pt;
- ept = pt + strlen(pt) - 1;
- while (bpt < ept) {
- c = *bpt;
- *bpt++ = *ept;
- *ept-- = c;
- }
- }
- return (pt);
- }
- }
- bpt = ept - 1;
- *bpt = '\0';
-
- /*
- * Allocate bytes (1024 - malloc space) for the string of "../"'s.
- * Should always be enough (it's 340 levels). If it's not, allocate
- * as necessary. Special case the first stat, it's ".", not "..".
- */
- if ((up = malloc(upsize = 1024 - 4)) == NULL)
- goto err;
- eup = up + MAXPATHLEN;
- bup = up;
- up[0] = '.';
- up[1] = '\0';
-
- /* Save root values, so know when to stop. */
- if (stat("/", &s))
- goto err;
- root_dev = s.st_dev;
- root_ino = s.st_ino;
-
- errno = 0; /* XXX readdir has no error return. */
-
- for (first = 1;; first = 0) {
- /* Stat the current level. */
- if (lstat(up, &s))
- goto err;
-
- /* Save current node values. */
- ino = s.st_ino;
- dev = s.st_dev;
-
- /* Check for reaching root. */
- if (root_dev == dev && root_ino == ino) {
- *--bpt = '/';
- /*
- * It's unclear that it's a requirement to copy the
- * path to the beginning of the buffer, but it's always
- * been that way and stuff would probably break.
- */
- bcopy(bpt, pt, ept - bpt);
- free(up);
- return (pt);
- }
-
- /*
- * Build pointer to the parent directory, allocating memory
- * as necessary. Max length is 3 for "../", the largest
- * possible component name, plus a trailing NULL.
- */
- if (bup + 3 + MAXNAMLEN + 1 >= eup) {
- if ((up = realloc(up, upsize *= 2)) == NULL)
- goto err;
- bup = up;
- eup = up + upsize;
- }
- *bup++ = '.';
- *bup++ = '.';
- *bup = '\0';
-
- /* Open and stat parent directory. */
- if (!(dir = opendir(up)) || fstat(dirfd(dir), &s))
- goto err;
-
- /* Add trailing slash for next directory. */
- *bup++ = '/';
- *bup = '\0';
-
- /*
- * If it's a mount point, have to stat each element because
- * the inode number in the directory is for the entry in the
- * parent directory, not the inode number of the mounted file.
- */
- save_errno = 0;
- if (s.st_dev == dev) {
- for (;;) {
- if (!(dp = readdir(dir)))
- goto notfound;
- if (dp->d_fileno == ino)
- break;
- }
- } else
- for (;;) {
- if (!(dp = readdir(dir)))
- goto notfound;
- if (ISDOT(dp))
- continue;
- bcopy(dp->d_name, bup, dp->d_namlen + 1);
-
- /* Save the first error for later. */
- if (lstat(up, &s)) {
- if (!save_errno)
- save_errno = errno;
- errno = 0;
- continue;
- }
- if (s.st_dev == dev && s.st_ino == ino)
- break;
- }
-
- /*
- * Check for length of the current name, preceding slash,
- * leading slash.
- */
- if (bpt - pt < dp->d_namlen + (first ? 1 : 2)) {
- size_t len, off;
-
- if (!ptsize) {
- errno = ERANGE;
- goto err;
- }
- off = bpt - pt;
- len = ept - bpt;
- if ((pt = realloc(pt, ptsize *= 2)) == NULL)
- goto err;
- bpt = pt + off;
- ept = pt + ptsize;
- bcopy(bpt, ept - len, len);
- bpt = ept - len;
- }
- if (!first)
- *--bpt = '/';
- bpt -= dp->d_namlen;
- bcopy(dp->d_name, bpt, dp->d_namlen);
- (void) closedir(dir);
- dir = NULL;
-
- /* Truncate any file name. */
- *bup = '\0';
- }
-
-notfound:
- /*
- * If readdir set errno, use it, not any saved error; otherwise,
- * didn't find the current directory in its parent directory, set
- * errno to ENOENT.
- */
- if (!errno)
- errno = save_errno ? save_errno : ENOENT;
- /* FALLTHROUGH */
-err:
- if (ptsize)
- free(pt);
- if (dir)
- (void) closedir(dir);
- free(up);
- return (NULL);
-}
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