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Diffstat (limited to 'bin/1sh/cd.c')
| -rw-r--r-- | bin/1sh/cd.c | 430 |
1 files changed, 0 insertions, 430 deletions
diff --git a/bin/1sh/cd.c b/bin/1sh/cd.c deleted file mode 100644 index d1780b64..00000000 --- a/bin/1sh/cd.c +++ /dev/null @@ -1,430 +0,0 @@ -/*- - * Copyright (c) 1991, 1993 - * The Regents of the University of California. All rights reserved. - * - * This code is derived from software contributed to Berkeley by - * Kenneth Almquist. - * - * 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. 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. - */ - -#ifndef lint -#if 0 -static char sccsid[] = "@(#)cd.c 8.2 (Berkeley) 5/4/95"; -#endif -#endif /* not lint */ -#include <sys/cdefs.h> -__FBSDID("$FreeBSD: releng/12.0/bin/sh/cd.c 336320 2018-07-15 21:55:17Z jilles $"); - -#include <sys/types.h> -#include <sys/stat.h> -#include <stdlib.h> -#include <string.h> -#include <unistd.h> -#include <errno.h> -#include <limits.h> - -/* - * The cd and pwd commands. - */ - -#include "shell.h" -#include "var.h" -#include "nodes.h" /* for jobs.h */ -#include "jobs.h" -#include "options.h" -#include "output.h" -#include "memalloc.h" -#include "error.h" -#include "exec.h" -#include "redir.h" -#include "mystring.h" -#include "show.h" -#include "cd.h" -#include "builtins.h" - -static int cdlogical(char *); -static int cdphysical(char *); -static int docd(char *, int, int); -static char *getcomponent(char **); -static char *findcwd(char *); -static void updatepwd(char *); -static char *getpwd(void); -static char *getpwd2(void); - -static char *curdir = NULL; /* current working directory */ - -int -cdcmd(int argc __unused, char **argv __unused) -{ - const char *dest; - const char *path; - char *p; - struct stat statb; - int ch, phys, print = 0, getcwderr = 0; - int rc; - int errno1 = ENOENT; - - phys = Pflag; - while ((ch = nextopt("eLP")) != '\0') { - switch (ch) { - case 'e': - getcwderr = 1; - break; - case 'L': - phys = 0; - break; - case 'P': - phys = 1; - break; - } - } - - if (*argptr != NULL && argptr[1] != NULL) - error("too many arguments"); - - if ((dest = *argptr) == NULL && (dest = bltinlookup("HOME", 1)) == NULL) - error("HOME not set"); - if (*dest == '\0') - dest = "."; - if (dest[0] == '-' && dest[1] == '\0') { - dest = bltinlookup("OLDPWD", 1); - if (dest == NULL) - error("OLDPWD not set"); - print = 1; - } - if (dest[0] == '/' || - (dest[0] == '.' && (dest[1] == '/' || dest[1] == '\0')) || - (dest[0] == '.' && dest[1] == '.' && (dest[2] == '/' || dest[2] == '\0')) || - (path = bltinlookup("CDPATH", 1)) == NULL) - path = ""; - while ((p = padvance(&path, NULL, dest)) != NULL) { - if (stat(p, &statb) < 0) { - if (errno != ENOENT) - errno1 = errno; - } else if (!S_ISDIR(statb.st_mode)) - errno1 = ENOTDIR; - else { - if (!print) { - /* - * XXX - rethink - */ - if (p[0] == '.' && p[1] == '/' && p[2] != '\0') - print = strcmp(p + 2, dest); - else - print = strcmp(p, dest); - } - rc = docd(p, print, phys); - if (rc >= 0) - return getcwderr ? rc : 0; - if (errno != ENOENT) - errno1 = errno; - } - } - error("%s: %s", dest, strerror(errno1)); - /*NOTREACHED*/ - return 0; -} - - -/* - * Actually change the directory. In an interactive shell, print the - * directory name if "print" is nonzero. - */ -static int -docd(char *dest, int print, int phys) -{ - int rc; - - TRACE(("docd(\"%s\", %d, %d) called\n", dest, print, phys)); - - /* If logical cd fails, fall back to physical. */ - if ((phys || (rc = cdlogical(dest)) < 0) && (rc = cdphysical(dest)) < 0) - return (-1); - - if (print && iflag && curdir) { - out1fmt("%s\n", curdir); - /* - * Ignore write errors to preserve the invariant that the - * current directory is changed iff the exit status is 0 - * (or 1 if -e was given and the full pathname could not be - * determined). - */ - flushout(out1); - outclearerror(out1); - } - - return (rc); -} - -static int -cdlogical(char *dest) -{ - char *p; - char *q; - char *component; - char *path; - struct stat statb; - int first; - int badstat; - - /* - * Check each component of the path. If we find a symlink or - * something we can't stat, clear curdir to force a getcwd() - * next time we get the value of the current directory. - */ - badstat = 0; - path = stsavestr(dest); - STARTSTACKSTR(p); - if (*dest == '/') { - STPUTC('/', p); - path++; - } - first = 1; - while ((q = getcomponent(&path)) != NULL) { - if (q[0] == '\0' || (q[0] == '.' && q[1] == '\0')) - continue; - if (! first) - STPUTC('/', p); - first = 0; - component = q; - STPUTS(q, p); - if (equal(component, "..")) - continue; - STACKSTRNUL(p); - if (lstat(stackblock(), &statb) < 0) { - badstat = 1; - break; - } - } - - INTOFF; - if ((p = findcwd(badstat ? NULL : dest)) == NULL || chdir(p) < 0) { - INTON; - return (-1); - } - updatepwd(p); - INTON; - return (0); -} - -static int -cdphysical(char *dest) -{ - char *p; - int rc = 0; - - INTOFF; - if (chdir(dest) < 0) { - INTON; - return (-1); - } - p = findcwd(NULL); - if (p == NULL) { - warning("warning: failed to get name of current directory"); - rc = 1; - } - updatepwd(p); - INTON; - return (rc); -} - -/* - * Get the next component of the path name pointed to by *path. - * This routine overwrites *path and the string pointed to by it. - */ -static char * -getcomponent(char **path) -{ - char *p; - char *start; - - if ((p = *path) == NULL) - return NULL; - start = *path; - while (*p != '/' && *p != '\0') - p++; - if (*p == '\0') { - *path = NULL; - } else { - *p++ = '\0'; - *path = p; - } - return start; -} - - -static char * -findcwd(char *dir) -{ - char *new; - char *p; - char *path; - - /* - * If our argument is NULL, we don't know the current directory - * any more because we traversed a symbolic link or something - * we couldn't stat(). - */ - if (dir == NULL || curdir == NULL) - return getpwd2(); - path = stsavestr(dir); - STARTSTACKSTR(new); - if (*dir != '/') { - STPUTS(curdir, new); - if (STTOPC(new) == '/') - STUNPUTC(new); - } - while ((p = getcomponent(&path)) != NULL) { - if (equal(p, "..")) { - while (new > stackblock() && (STUNPUTC(new), *new) != '/'); - } else if (*p != '\0' && ! equal(p, ".")) { - STPUTC('/', new); - STPUTS(p, new); - } - } - if (new == stackblock()) - STPUTC('/', new); - STACKSTRNUL(new); - return stackblock(); -} - -/* - * Update curdir (the name of the current directory) in response to a - * cd command. We also call hashcd to let the routines in exec.c know - * that the current directory has changed. - */ -static void -updatepwd(char *dir) -{ - char *prevdir; - - hashcd(); /* update command hash table */ - - setvar("PWD", dir, VEXPORT); - setvar("OLDPWD", curdir, VEXPORT); - prevdir = curdir; - curdir = dir ? savestr(dir) : NULL; - ckfree(prevdir); -} - -int -pwdcmd(int argc __unused, char **argv __unused) -{ - char *p; - int ch, phys; - - phys = Pflag; - while ((ch = nextopt("LP")) != '\0') { - switch (ch) { - case 'L': - phys = 0; - break; - case 'P': - phys = 1; - break; - } - } - - if (*argptr != NULL) - error("too many arguments"); - - if (!phys && getpwd()) { - out1str(curdir); - out1c('\n'); - } else { - if ((p = getpwd2()) == NULL) - error(".: %s", strerror(errno)); - out1str(p); - out1c('\n'); - } - - return 0; -} - -/* - * Get the current directory and cache the result in curdir. - */ -static char * -getpwd(void) -{ - char *p; - - if (curdir) - return curdir; - - p = getpwd2(); - if (p != NULL) - curdir = savestr(p); - - return curdir; -} - -#define MAXPWD 256 - -/* - * Return the current directory. - */ -static char * -getpwd2(void) -{ - char *pwd; - int i; - - for (i = MAXPWD;; i *= 2) { - pwd = stalloc(i); - if (getcwd(pwd, i) != NULL) - return pwd; - stunalloc(pwd); - if (errno != ERANGE) - break; - } - - return NULL; -} - -/* - * Initialize PWD in a new shell. - * If the shell is interactive, we need to warn if this fails. - */ -void -pwd_init(int warn) -{ - char *pwd; - struct stat stdot, stpwd; - - pwd = lookupvar("PWD"); - if (pwd && *pwd == '/' && stat(".", &stdot) != -1 && - stat(pwd, &stpwd) != -1 && - stdot.st_dev == stpwd.st_dev && - stdot.st_ino == stpwd.st_ino) { - if (curdir) - ckfree(curdir); - curdir = savestr(pwd); - } - if (getpwd() == NULL && warn) - out2fmt_flush("sh: cannot determine working directory\n"); - setvar("PWD", curdir, VEXPORT); -} |