1 /* $Header: /p/tcsh/cvsroot/tcsh/sh.dir.c,v 3.79 2006/09/25 18:17:26 christos Exp $ */
3 * sh.dir.c: Directory manipulation functions
6 * Copyright (c) 1980, 1991 The Regents of the University of California.
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 * 3. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
36 RCSID("$tcsh: sh.dir.c,v 3.79 2006/09/25 18:17:26 christos Exp $")
39 * C Shell - directory management
42 static Char
*agetcwd (void);
43 static void dstart (const char *);
44 static struct directory
*dfind (Char
*);
45 static Char
*dfollow (Char
*);
46 static void printdirs (int);
47 static Char
*dgoto (Char
*);
48 static void dnewcwd (struct directory
*, int);
49 static void dset (Char
*);
50 static void dextract (struct directory
*);
51 static int skipargs (Char
***, const char *,
53 static void dgetstack (void);
55 static struct directory dhead INIT_ZERO_STRUCT
; /* "head" of loop */
56 static int printd
; /* force name to be printed */
58 int bequiet
= 0; /* do not print dir stack -strike */
69 while (getcwd(buf
, len
) == NULL
) {
79 buf
= xrealloc(buf
, len
);
91 dstart(const char *from
)
93 xprintf(CGETS(12, 1, "%s: Trying to start from \"%s\"\n"), progname
, from
);
97 * dinit - initialize current working directory
103 struct directory
*dp
;
105 /* Don't believe the login shell home, because it may be a symlink */
108 xprintf("%s: %s\n", progname
, strerror(errno
));
110 char *xcp
= short2str(hp
);
112 if (chdir(xcp
) == -1)
121 if (chdir("/") == -1)
122 /* I am not even try to print an error message! */
129 struct stat swd
, shp
;
132 swd_ok
= stat(short2str(tcp
), &swd
) == 0;
134 * See if $HOME is the working directory we got and use that
136 if (swd_ok
&& hp
&& *hp
&& stat(short2str(hp
), &shp
) != -1 &&
137 DEV_DEV_COMPARE(swd
.st_dev
, shp
.st_dev
) &&
138 swd
.st_ino
== shp
.st_ino
)
144 * use PWD if we have it (for subshells)
146 if (swd_ok
&& (cwd
= getenv("PWD")) != NULL
) {
147 if (stat(cwd
, &shp
) != -1 &&
148 DEV_DEV_COMPARE(swd
.st_dev
, shp
.st_dev
) &&
149 swd
.st_ino
== shp
.st_ino
) {
151 cleanup_push(tcp
, xfree
);
154 cleanup_push(tcp
, xfree
);
155 cp
= dcanon(tcp
, STRNULL
);
160 cleanup_push(tcp
, xfree
);
161 cp
= dcanon(tcp
, STRNULL
);
167 dp
= xcalloc(sizeof(struct directory
), 1);
170 dhead
.di_next
= dhead
.di_prev
= dp
;
171 dp
->di_next
= dp
->di_prev
= &dhead
;
174 setcopy(STRdirstack
, dp
->di_name
, VAR_READWRITE
|VAR_NOGLOB
);
181 * Don't call set() directly cause if the directory contains ` or
182 * other junk characters glob will fail.
184 setcopy(STRowd
, varval(STRcwd
), VAR_READWRITE
|VAR_NOGLOB
);
185 setcopy(STRcwd
, dp
, VAR_READWRITE
|VAR_NOGLOB
);
189 #define DIR_PRINT 0x01 /* -p */
190 #define DIR_LONG 0x02 /* -l */
191 #define DIR_VERT 0x04 /* -v */
192 #define DIR_LINE 0x08 /* -n */
193 #define DIR_SAVE 0x10 /* -S */
194 #define DIR_LOAD 0x20 /* -L */
195 #define DIR_CLEAR 0x40 /* -c */
196 #define DIR_OLD 0x80 /* - */
199 skipargs(Char
***v
, const char *dstr
, const char *str
)
203 int dflag
= 0, loop
= 1;
204 for (n
++; loop
&& *n
!= NULL
&& (*n
)[0] == '-'; n
++)
205 if (*(s
= &((*n
)[1])) == '\0') /* test for bare "-" argument */
209 while (*s
!= '\0') /* examine flags */
211 if ((p
= strchr(dstr
, *s
++)) != NULL
)
212 dflag
|= (1 << (p
- dstr
));
214 stderror(ERR_DIRUS
, short2str(**v
), dstr
, str
);
217 if (*n
&& (dflag
& DIR_OLD
))
218 stderror(ERR_DIRUS
, short2str(**v
), dstr
, str
);
220 /* make -l, -v, and -n imply -p */
221 if (dflag
& (DIR_LONG
|DIR_VERT
|DIR_LINE
))
227 * dodirs - list all directories in directory loop
231 dodirs(Char
**v
, struct command
*c
)
233 static const char flags
[] = "plvnSLc";
234 int dflag
= skipargs(&v
, flags
, "");
237 if ((dflag
& DIR_CLEAR
) != 0) {
238 struct directory
*dp
, *fdp
;
239 for (dp
= dcwd
->di_next
; dp
!= dcwd
; ) {
245 dhead
.di_next
= dhead
.di_prev
= dp
;
246 dp
->di_next
= dp
->di_prev
= &dhead
;
248 if ((dflag
& DIR_LOAD
) != 0)
250 else if ((dflag
& DIR_SAVE
) != 0)
253 if (*v
&& (dflag
& (DIR_SAVE
|DIR_LOAD
)))
256 if (*v
!= NULL
|| (dflag
& DIR_OLD
))
257 stderror(ERR_DIRUS
, "dirs", flags
, "");
258 if ((dflag
& (DIR_CLEAR
|DIR_LOAD
|DIR_SAVE
)) == 0 || (dflag
& DIR_PRINT
))
265 struct directory
*dp
;
275 if (dflag
& DIR_VERT
) {
276 xprintf("%d\t", idx
++);
281 if (!(dflag
& DIR_LONG
) && (user
= getusername(&s
)) != NULL
)
282 len
= (int) (Strlen(user
) + Strlen(s
) + 2);
284 len
= (int) (Strlen(s
) + 1);
287 if ((dflag
& DIR_LINE
) && cur
>= TermH
- 1 && len
< TermH
) {
292 xprintf("~%S", user
);
293 xprintf("%-S%c", s
, (dflag
& DIR_VERT
) ? '\n' : ' ');
294 } while ((dp
= dp
->di_prev
) != dcwd
);
295 if (!(dflag
& DIR_VERT
))
303 if ((user
= getusername(&dir
)) != NULL
)
304 xprintf("~%-S%S", user
, dir
);
312 struct directory
*d
= dcwd
;
317 d
->di_name
= dcanon(d
->di_name
, STRNULL
);
318 } while ((d
= d
->di_prev
) != dcwd
);
325 * The path will be normalized if it
327 * 2) or starts with "../",
328 * 3) or ends with "/..",
329 * 4) or contains the string "/../",
330 * then it will be normalized, unless those strings are quoted.
331 * Otherwise, a copy is made and sent back.
334 dnormalize(const Char
*cp
, int expnd
)
337 /* return true if dp is of the form "../xxx" or "/../xxx" */
338 #define IS_DOTDOT(sp, p) (ISDOTDOT(p) && ((p) == (sp) || *((p) - 1) == '/'))
339 #define IS_DOT(sp, p) (ISDOT(p) && ((p) == (sp) || *((p) - 1) == '/'))
343 struct Strbuf buf
= Strbuf_INIT
;
346 const Char
*start
= cp
;
347 # ifdef HAVE_SLASHSLASH
349 # endif /* HAVE_SLASHSLASH */
352 * count the number of "../xxx" or "xxx/../xxx" in the path
354 for ( ; *cp
&& *(cp
+ 1); cp
++)
355 if (IS_DOTDOT(start
, cp
))
359 * if none, we are done.
362 return (Strsave(start
));
367 * We disable this test because:
368 * cd /tmp; mkdir dir1 dir2; cd dir2; ln -s /tmp/dir1; cd dir1;
369 * echo ../../dir1 does not expand. We had enabled this before
370 * because it was bothering people with expansions in compilation
371 * lines like -I../../foo. Maybe we need some kind of finer grain
374 * If the path doesn't exist, we are done too.
376 if (lstat(short2str(start
), &sb
) != 0 && errno
== ENOENT
)
377 return (Strsave(start
));
380 cwd
= xmalloc((Strlen(dcwd
->di_name
) + 3) * sizeof(Char
));
381 (void) Strcpy(cwd
, dcwd
->di_name
);
384 * If the path starts with a slash, we are not relative to
385 * the current working directory.
387 if (ABSOLUTEP(start
))
389 # ifdef HAVE_SLASHSLASH
390 slashslash
= cwd
[0] == '/' && cwd
[1] == '/';
391 # endif /* HAVE_SLASHSLASH */
394 * Ignore . and count ..'s
401 if (IS_DOT(start
, cp
)) {
405 else if (IS_DOTDOT(start
, cp
)) {
407 break; /* finish analyzing .././../xxx/[..] */
414 Strbuf_append1(&buf
, *cp
++);
416 Strbuf_terminate(&buf
);
418 if ((dp
= Strrchr(cwd
, '/')) != NULL
) {
419 # ifdef HAVE_SLASHSLASH
422 # endif /* HAVE_SLASHSLASH */
429 if (!*cwd
) { /* too many ..'s, starts with "/" */
431 # ifdef HAVE_SLASHSLASH
433 * Only append another slash, if already the former cwd
434 * was in a double-slash path.
436 cwd
[1] = slashslash
? '/' : '\0';
438 # else /* !HAVE_SLASHSLASH */
440 # endif /* HAVE_SLASHSLASH */
442 # ifdef HAVE_SLASHSLASH
443 else if (slashslash
&& cwd
[1] == '\0') {
447 # endif /* HAVE_SLASHSLASH */
453 if (TRM(cwd
[i
- 1]) != '/') {
457 dp
= Strspl(cwd
, TRM(buf
.s
[0]) == '/' ? &buf
.s
[1] : buf
.s
);
461 if (TRM(cwd
[i
]) == '/')
464 /* Reduction of ".." following the stuff we collected in buf
465 * only makes sense if the directory item in buf really exists.
466 * Avoid reduction of "-I../.." (typical compiler call) to ""
467 * or "/usr/nonexistant/../bin" to "/usr/bin":
471 if (0 != stat(short2str(cwd
), &exists
)) {
474 return Strsave(start
);
477 } while (*cp
!= '\0');
487 * dochngd - implement chdir command.
491 dochngd(Char
**v
, struct command
*c
)
494 struct directory
*dp
;
495 int dflag
= skipargs(&v
, "plvn", "[-|<dir>]");
499 cp
= (dflag
& DIR_OLD
) ? varval(STRowd
) : *v
;
502 if ((cp
= varval(STRhome
)) == STRNULL
|| *cp
== 0)
503 stderror(ERR_NAME
| ERR_NOHOMEDIR
);
504 if (chdir(short2str(cp
)) < 0)
505 stderror(ERR_NAME
| ERR_CANTCHANGE
);
508 else if ((dflag
& DIR_OLD
) == 0 && v
[1] != NULL
) {
509 stderror(ERR_NAME
| ERR_TOOMANY
);
513 else if ((dp
= dfind(cp
)) != 0) {
517 if (chdir(tmp
= short2str(dp
->di_name
)) < 0)
518 stderror(ERR_SYSTEM
, tmp
, strerror(errno
));
519 dcwd
->di_prev
->di_next
= dcwd
->di_next
;
520 dcwd
->di_next
->di_prev
= dcwd
->di_prev
;
526 if ((cp
= dfollow(cp
)) == NULL
)
528 dp
= xcalloc(sizeof(struct directory
), 1);
531 dp
->di_next
= dcwd
->di_next
;
532 dp
->di_prev
= dcwd
->di_prev
;
533 dp
->di_prev
->di_next
= dp
;
534 dp
->di_next
->di_prev
= dp
;
549 cwdlen
= Strlen(dcwd
->di_name
);
550 if (cwdlen
== 1) /* root */
552 dp
= xmalloc((cwdlen
+ Strlen(cp
) + 2) * sizeof(Char
));
553 for (p
= dp
, q
= dcwd
->di_name
; (*p
++ = *q
++) != '\0';)
558 p
--; /* don't add a / after root */
567 #if defined(WINNT_NATIVE)
569 #elif defined(__CYGWIN__)
570 if (ABSOLUTEP(cp
) && cp
[1] == ':') { /* Only DOS paths are treated that way */
573 cleanup_push(cp
, xfree
);
574 ret
= dcanon(cp
, dp
);
578 #else /* !WINNT_NATIVE */
579 cleanup_push(cp
, xfree
);
580 ret
= dcanon(cp
, dp
);
583 #endif /* WINNT_NATIVE */
588 * dfollow - change to arg directory; fall back on cdpath if not valid
597 cp
= globone(cp
, G_ERROR
);
598 cleanup_push(cp
, xfree
);
600 if (Strchr(cp
, '`')) {
602 if (chdir(dptr
= short2str(cp
)) < 0)
603 stderror(ERR_SYSTEM
, dptr
, strerror(errno
));
605 cleanup_push(dp
, xfree
);
611 stderror(ERR_SYSTEM
, dptr
, strerror(errno
));
616 * if we are ignoring symlinks, try to fix relatives now.
617 * if we are expading symlinks, it should be done by now.
619 dp
= dnormalize(cp
, symlinks
== SYM_IGNORE
);
620 if (chdir(short2str(dp
)) >= 0) {
626 if (chdir(short2str(cp
)) >= 0) {
631 else if (errno
!= ENOENT
&& errno
!= ENOTDIR
) {
635 stderror(ERR_SYSTEM
, short2str(cp
), strerror(err
));
640 if (cp
[0] != '/' && !prefix(STRdotsl
, cp
) && !prefix(STRdotdotsl
, cp
)
641 && (c
= adrof(STRcdpath
)) && c
->vec
!= NULL
) {
642 struct Strbuf buf
= Strbuf_INIT
;
645 for (cdp
= c
->vec
; *cdp
; cdp
++) {
647 Strbuf_append(&buf
, *cdp
);
648 Strbuf_append1(&buf
, '/');
649 Strbuf_append(&buf
, cp
);
650 Strbuf_terminate(&buf
);
652 * We always want to fix the directory here
653 * If we are normalizing symlinks
655 dp
= dnormalize(buf
.s
, symlinks
== SYM_IGNORE
||
656 symlinks
== SYM_EXPAND
);
657 if (chdir(short2str(dp
)) >= 0) {
663 else if (chdir(short2str(cp
)) >= 0) {
675 if ((dp
[0] == '/' || dp
[0] == '.') && chdir(short2str(dp
)) >= 0) {
682 * on login source of ~/.cshdirs, errors are eaten. the dir stack is all
683 * directories we could get to.
686 stderror(ERR_SYSTEM
, short2str(cp
), strerror(serrno
));
693 * dopushd - push new directory onto directory stack.
694 * with no arguments exchange top and second.
695 * with numeric argument (+n) bring it to top.
699 dopushd(Char
**v
, struct command
*c
)
701 struct directory
*dp
;
703 int dflag
= skipargs(&v
, "plvn", " [-|<dir>|+<n>]");
707 cp
= (dflag
& DIR_OLD
) ? varval(STRowd
) : *v
;
710 if (adrof(STRpushdtohome
)) {
711 if ((cp
= varval(STRhome
)) == STRNULL
|| *cp
== 0)
712 stderror(ERR_NAME
| ERR_NOHOMEDIR
);
713 if (chdir(short2str(cp
)) < 0)
714 stderror(ERR_NAME
| ERR_CANTCHANGE
);
715 if ((cp
= dfollow(cp
)) == NULL
)
717 dp
= xcalloc(sizeof(struct directory
), 1);
721 dp
->di_next
= dcwd
->di_next
;
723 dp
->di_next
->di_prev
= dp
;
728 if ((dp
= dcwd
->di_prev
) == &dhead
)
731 stderror(ERR_NAME
| ERR_NODIR
);
732 if (chdir(tmp
= short2str(dp
->di_name
)) < 0)
733 stderror(ERR_SYSTEM
, tmp
, strerror(errno
));
734 dp
->di_prev
->di_next
= dp
->di_next
;
735 dp
->di_next
->di_prev
= dp
->di_prev
;
736 dp
->di_next
= dcwd
->di_next
;
738 dcwd
->di_next
->di_prev
= dp
;
742 else if ((dflag
& DIR_OLD
) == 0 && v
[1] != NULL
) {
743 stderror(ERR_NAME
| ERR_TOOMANY
);
747 else if ((dp
= dfind(cp
)) != NULL
) {
750 if (chdir(tmp
= short2str(dp
->di_name
)) < 0)
751 stderror(ERR_SYSTEM
, tmp
, strerror(errno
));
753 * kfk - 10 Feb 1984 - added new "extraction style" pushd +n
755 if (adrof(STRdextract
))
761 if ((ccp
= dfollow(cp
)) == NULL
)
763 dp
= xcalloc(sizeof(struct directory
), 1);
767 dp
->di_next
= dcwd
->di_next
;
769 dp
->di_next
->di_prev
= dp
;
775 * dfind - find a directory if specified by numeric (+n) argument
777 static struct directory
*
780 struct directory
*dp
;
786 for (ep
= cp
; Isdigit(*ep
); ep
++)
793 for (dp
= dcwd
; i
!= 0; i
--) {
794 if ((dp
= dp
->di_prev
) == &dhead
)
797 stderror(ERR_NAME
| ERR_DEEP
);
803 * dopopd - pop a directory out of the directory stack
804 * with a numeric argument just discard it.
808 dopopd(Char
**v
, struct command
*c
)
811 struct directory
*dp
, *p
= NULL
;
812 int dflag
= skipargs(&v
, "plvn", " [-|+<n>]");
816 cp
= (dflag
& DIR_OLD
) ? varval(STRowd
) : *v
;
820 else if ((dflag
& DIR_OLD
) == 0 && v
[1] != NULL
) {
821 stderror(ERR_NAME
| ERR_TOOMANY
);
825 else if ((dp
= dfind(cp
)) == 0)
826 stderror(ERR_NAME
| ERR_BADDIR
);
827 if (dp
->di_prev
== &dhead
&& dp
->di_next
== &dhead
)
828 stderror(ERR_NAME
| ERR_EMPTY
);
832 if ((p
= dp
->di_prev
) == &dhead
)
834 if (chdir(tmp
= short2str(p
->di_name
)) < 0)
835 stderror(ERR_SYSTEM
, tmp
, strerror(errno
));
837 dp
->di_prev
->di_next
= dp
->di_next
;
838 dp
->di_next
->di_prev
= dp
->di_prev
;
849 * dfree - free the directory (or keep it if it still has ref count)
852 dfree(struct directory
*dp
)
855 if (dp
->di_count
!= 0) {
856 dp
->di_next
= dp
->di_prev
= 0;
865 * dcanon - canonicalize the pathname, removing excess ./ and ../ etc.
866 * we are of course assuming that the file system is standardly
867 * constructed (always have ..'s, directories have links)
870 dcanon(Char
*cp
, Char
*p
)
873 Char
*p1
, *p2
; /* general purpose */
875 #ifdef HAVE_SLASHSLASH
877 #endif /* HAVE_SLASHSLASH */
880 #ifdef S_IFLNK /* if we have symlinks */
889 * christos: if the path given does not start with a slash prepend cwd. If
890 * cwd does not start with a slash or the result would be too long try to
893 if (!ABSOLUTEP(cp
)) {
898 if (p1
== STRNULL
|| !ABSOLUTEP(p1
)) {
899 Char
*new_cwd
= agetcwd();
901 if (new_cwd
== NULL
) {
902 xprintf("%s: %s\n", progname
, strerror(errno
));
903 setcopy(STRcwd
, str2short("/"), VAR_READWRITE
|VAR_NOGLOB
);
906 setv(STRcwd
, new_cwd
, VAR_READWRITE
|VAR_NOGLOB
);
910 tmpdir
= xmalloc((len
+ clen
+ 2) * sizeof (*tmpdir
));
911 (void) Strcpy(tmpdir
, p1
);
912 (void) Strcat(tmpdir
, STRslash
);
913 (void) Strcat(tmpdir
, cp
);
918 #ifdef HAVE_SLASHSLASH
919 slashslash
= (cp
[0] == '/' && cp
[1] == '/');
920 #endif /* HAVE_SLASHSLASH */
922 while (*p
) { /* for each component */
923 sp
= p
; /* save slash address */
924 while (*++p
== '/') /* flush extra slashes */
927 for (p1
= sp
, p2
= p
; (*p1
++ = *p2
++) != '\0';)
929 p
= sp
; /* save start of component */
932 while (*++p
) /* find next slash or end of path */
939 #ifdef HAVE_SLASHSLASH
940 if (&cp
[1] == sp
&& sp
[0] == '.' && sp
[1] == '.' && sp
[2] == '\0')
942 #endif /* HAVE_SLASHSLASH */
943 if (*sp
== '\0') { /* if component is null */
944 if (--sp
== cp
) /* if path is one char (i.e. /) */
949 else if (sp
[0] == '.' && sp
[1] == 0) {
951 for (p1
= sp
, p2
= p
+ 1; (*p1
++ = *p2
++) != '\0';)
960 else if (sp
[0] == '.' && sp
[1] == '.' && sp
[2] == 0) {
962 * We have something like "yyy/xxx/..", where "yyy" can be null or
963 * a path starting at /, and "xxx" is a single component. Before
964 * compressing "xxx/..", we want to expand "yyy/xxx", if it is a
967 *--sp
= 0; /* form the pathname for readlink */
968 #ifdef S_IFLNK /* if we have symlinks */
969 if (sp
!= cp
&& /* symlinks != SYM_IGNORE && */
970 (tlink
= areadlink(short2str(cp
))) != NULL
) {
971 mlink
= str2short(tlink
);
977 * Point p to the '/' in "/..", and restore the '/'.
982 * Relative path, expand it between the "yyy/" and the
983 * "/..". First, back sp up to the character past "yyy/".
990 * New length is "yyy/" + mlink + "/.." and rest
992 p1
= newcp
= xmalloc(((sp
- cp
) + Strlen(mlink
) +
993 Strlen(p
) + 1) * sizeof(Char
));
995 * Copy new path into newcp
997 for (p2
= cp
; (*p1
++ = *p2
++) != '\0';)
999 for (p1
--, p2
= mlink
; (*p1
++ = *p2
++) != '\0';)
1001 for (p1
--, p2
= p
; (*p1
++ = *p2
++) != '\0';)
1004 * Restart canonicalization at expanded "/xxx".
1006 p
= sp
- cp
- 1 + newcp
;
1009 newcp
= Strspl(mlink
, p
);
1011 * Restart canonicalization at beginning
1017 #ifdef HAVE_SLASHSLASH
1018 slashslash
= (cp
[0] == '/' && cp
[1] == '/');
1019 #endif /* HAVE_SLASHSLASH */
1020 continue; /* canonicalize the link */
1022 #endif /* S_IFLNK */
1025 while (*--sp
!= '/')
1028 for (p1
= sp
+ 1, p2
= p
+ 1; (*p1
++ = *p2
++) != '\0';)
1037 else { /* normal dir name (not . or .. or nothing) */
1039 #ifdef S_IFLNK /* if we have symlinks */
1040 if (sp
!= cp
&& symlinks
== SYM_CHASE
&&
1041 (tlink
= areadlink(short2str(cp
))) != NULL
) {
1042 mlink
= str2short(tlink
);
1052 * point sp to p (rather than backing up).
1056 if (*mlink
!= '/') {
1058 * Relative path, expand it between the "yyy/" and the
1059 * remainder. First, back sp up to the character past
1062 while (*--sp
!= '/')
1067 * New length is "yyy/" + mlink + "/.." and rest
1069 p1
= newcp
= xmalloc(((sp
- cp
) + Strlen(mlink
) +
1070 Strlen(p
) + 1) * sizeof(Char
));
1072 * Copy new path into newcp
1074 for (p2
= cp
; (*p1
++ = *p2
++) != '\0';)
1076 for (p1
--, p2
= mlink
; (*p1
++ = *p2
++) != '\0';)
1078 for (p1
--, p2
= p
; (*p1
++ = *p2
++) != '\0';)
1081 * Restart canonicalization at expanded "/xxx".
1083 p
= sp
- cp
- 1 + newcp
;
1086 newcp
= Strspl(mlink
, p
);
1088 * Restart canonicalization at beginning
1094 #ifdef HAVE_SLASHSLASH
1095 slashslash
= (cp
[0] == '/' && cp
[1] == '/');
1096 #endif /* HAVE_SLASHSLASH */
1097 continue; /* canonicalize the mlink */
1099 #endif /* S_IFLNK */
1109 p1
= varval(STRhome
);
1112 * See if we're not in a subdir of STRhome
1114 if (p1
&& *p1
== '/' && (Strncmp(p1
, cp
, cc
) != 0 ||
1115 (cp
[cc
] != '/' && cp
[cc
] != '\0'))) {
1116 static ino_t home_ino
= (ino_t
) -1;
1117 static dev_t home_dev
= (dev_t
) -1;
1118 static Char
*home_ptr
= NULL
;
1119 struct stat statbuf
;
1124 * Get dev and ino of STRhome
1126 if (home_ptr
!= p1
&&
1127 stat(short2str(p1
), &statbuf
) != -1) {
1128 home_dev
= statbuf
.st_dev
;
1129 home_ino
= statbuf
.st_ino
;
1133 * Start comparing dev & ino backwards
1135 p2
= copy
= Strsave(cp
);
1137 while (*p2
&& stat(short2str(p2
), &statbuf
) != -1) {
1138 if (DEV_DEV_COMPARE(statbuf
.st_dev
, home_dev
) &&
1139 statbuf
.st_ino
== home_ino
) {
1143 if ((sp
= Strrchr(p2
, '/')) != NULL
)
1147 * See if we found it
1151 * Use STRhome to make '~' work
1153 newcp
= Strspl(p1
, cp
+ Strlen(p2
));
1159 #endif /* S_IFLNK */
1161 #ifdef HAVE_SLASHSLASH
1164 p
= xmalloc((Strlen(cp
) + 2) * sizeof(Char
));
1166 (void) Strcpy(&p
[1], cp
);
1171 if (cp
[1] == '/' && cp
[2] == '/') {
1172 for (p1
= &cp
[1], p2
= &cp
[2]; (*p1
++ = *p2
++) != '\0';)
1175 #endif /* HAVE_SLASHSLASH */
1181 * dnewcwd - make a new directory in the loop the current one
1184 dnewcwd(struct directory
*dp
, int dflag
)
1188 if (adrof(STRdunique
)) {
1189 struct directory
*dn
;
1191 for (dn
= dhead
.di_prev
; dn
!= &dhead
; dn
= dn
->di_prev
)
1192 if (dn
!= dp
&& Strcmp(dn
->di_name
, dp
->di_name
) == 0) {
1193 dn
->di_next
->di_prev
= dn
->di_prev
;
1194 dn
->di_prev
->di_next
= dn
->di_next
;
1200 dset(dcwd
->di_name
);
1202 print
= printd
; /* if printd is set, print dirstack... */
1203 if (adrof(STRpushdsilent
)) /* but pushdsilent overrides printd... */
1205 if (dflag
& DIR_PRINT
) /* but DIR_PRINT overrides pushdsilent... */
1207 if (bequiet
) /* and bequiet overrides everything */
1211 cwd_cmd(); /* PWP: run the defined cwd command */
1219 struct directory
*dn
, *dp
;
1221 if ((vp
= adrof(STRdirstack
)) == NULL
|| vp
->vec
== NULL
)
1224 /* Free the whole stack */
1225 while ((dn
= dhead
.di_prev
) != &dhead
) {
1226 dn
->di_next
->di_prev
= dn
->di_prev
;
1227 dn
->di_prev
->di_next
= dn
->di_next
;
1232 /* thread the current working directory */
1233 dhead
.di_prev
= dhead
.di_next
= dcwd
;
1234 dcwd
->di_next
= dcwd
->di_prev
= &dhead
;
1236 /* put back the stack */
1237 for (cp
= vp
->vec
; cp
&& *cp
&& **cp
; cp
++) {
1238 dp
= xcalloc(sizeof(struct directory
), 1);
1239 dp
->di_name
= Strsave(*cp
);
1242 dp
->di_next
= dcwd
->di_next
;
1244 dp
->di_next
->di_prev
= dp
;
1246 dgetstack(); /* Make $dirstack reflect the current state */
1254 struct directory
*dn
;
1256 if (adrof(STRdirstack
) == NULL
)
1259 for (dn
= dhead
.di_prev
; dn
!= &dhead
; dn
= dn
->di_prev
, i
++)
1261 dbp
= dblk
= xmalloc((i
+ 1) * sizeof(Char
*));
1262 for (dn
= dhead
.di_prev
; dn
!= &dhead
; dn
= dn
->di_prev
, dbp
++)
1263 *dbp
= Strsave(dn
->di_name
);
1265 cleanup_push(dblk
, blk_cleanup
);
1266 setq(STRdirstack
, dblk
, &shvhed
, VAR_READWRITE
);
1267 cleanup_ignore(dblk
);
1268 cleanup_until(dblk
);
1272 * getstakd - added by kfk 17 Jan 1984
1273 * Support routine for the stack hack. Finds nth directory in
1274 * the directory stack, or finds last directory in stack.
1279 struct directory
*dp
;
1282 if (cnt
< 0) { /* < 0 ==> last dir requested. */
1300 * Karl Kleinpaste - 10 Feb 1984
1301 * Added dextract(), which is used in pushd +n.
1302 * Instead of just rotating the entire stack around, dextract()
1303 * lets the user have the nth dir extracted from its current
1304 * position, and pushes it onto the top.
1307 dextract(struct directory
*dp
)
1311 dp
->di_next
->di_prev
= dp
->di_prev
;
1312 dp
->di_prev
->di_next
= dp
->di_next
;
1313 dp
->di_next
= dcwd
->di_next
;
1315 dp
->di_next
->di_prev
= dp
;
1320 bequiet_cleanup(void *dummy
)
1327 loaddirs(Char
*fname
)
1329 static Char
*loaddirs_cmd
[] = { STRsource
, NULL
, NULL
};
1332 cleanup_push(&bequiet
, bequiet_cleanup
);
1334 loaddirs_cmd
[1] = fname
;
1335 else if ((fname
= varval(STRdirsfile
)) != STRNULL
)
1336 loaddirs_cmd
[1] = fname
;
1338 loaddirs_cmd
[1] = STRtildotdirs
;
1339 dosource(loaddirs_cmd
, NULL
);
1340 cleanup_until(&bequiet
);
1344 * create a file called ~/.cshdirs which has a sequence
1345 * of pushd commands which will restore the dir stack to
1346 * its state before exit/logout. remember that the order
1347 * is reversed in the file because we are pushing.
1351 recdirs(Char
*fname
, int def
)
1353 int fp
, ftmp
, oldidfds
;
1355 struct directory
*dp
;
1358 struct Strbuf qname
= Strbuf_INIT
;
1360 if (fname
== NULL
&& !def
)
1363 if (fname
== NULL
) {
1364 if ((fname
= varval(STRdirsfile
)) == STRNULL
)
1365 fname
= Strspl(varval(STRhome
), &STRtildotdirs
[1]);
1367 fname
= Strsave(fname
);
1370 fname
= globone(fname
, G_ERROR
);
1371 cleanup_push(fname
, xfree
);
1373 if ((fp
= xcreat(short2str(fname
), 0600)) == -1) {
1374 cleanup_until(fname
);
1378 if ((snum
= varval(STRsavedirs
)) == STRNULL
|| snum
[0] == '\0')
1379 num
= (unsigned int) ~0;
1381 num
= (unsigned int) atoi(short2str(snum
));
1388 cleanup_push(&qname
, Strbuf_cleanup
);
1396 xprintf("cd %S\n", quote_meta(&qname
, dp
->di_name
));
1399 xprintf("pushd %S\n", quote_meta(&qname
, dp
->di_name
));
1404 } while ((dp
= dp
->di_next
) != dcwd
->di_next
);
1409 cleanup_until(fname
);