2 * $Id: unix.c,v 1.43.2.1.2.10.2.4 2008-11-25 15:16:33 didg Exp $
4 * Copyright (c) 1990,1993 Regents of The University of Michigan.
5 * All Rights Reserved. See COPYRIGHT.
10 #endif /* HAVE_CONFIG_H */
18 #else /* STDC_HEADERS */
23 #endif /* HAVE_STRCHR */
24 char *strchr (), *strrchr ();
27 #define memcpy(d,s,n) bcopy ((s), (d), (n))
28 #define memmove(d,s,n) bcopy ((s), (d), (n))
29 #endif /* ! HAVE_MEMCPY */
30 #endif /* STDC_HEADERS */
35 #include <sys/param.h>
37 #include <atalk/logger.h>
38 #include <atalk/adouble.h>
39 #include <atalk/afp.h>
40 #include <atalk/util.h>
43 #include "directory.h"
49 * Get the free space on a partition.
51 int ustatfs_getvolspace( vol, bfree, btotal, bsize )
52 const struct vol *vol;
53 VolSpace *bfree, *btotal;
56 VolSpace maxVolSpace = (~(VolSpace)0);
65 if ( statfs( vol->v_path, &sfs ) < 0 ) {
66 LOG(log_error, logtype_afpd, "ustatfs_getvolspace unable to stat %s", vol->v_path);
67 return( AFPERR_PARAM );
71 *bfree = (VolSpace) sfs.fd_req.bfreen;
74 *bfree = (VolSpace) sfs.f_bavail;
75 *bsize = sfs.f_frsize;
78 if ( *bfree > maxVolSpace / *bsize ) {
86 ( sfs.fd_req.btot - ( sfs.fd_req.bfree - sfs.fd_req.bfreen ));
89 ( sfs.f_blocks - ( sfs.f_bfree - sfs.f_bavail ));
92 /* see similar block above comments */
93 if ( *btotal > maxVolSpace / *bsize ) {
94 *btotal = maxVolSpace;
102 static int utombits( bits )
109 mbits |= ( bits & ( S_IREAD >> 6 )) ? AR_UREAD : 0;
110 mbits |= ( bits & ( S_IWRITE >> 6 )) ? AR_UWRITE : 0;
111 /* Do we really need this? */
112 mbits |= ( bits & ( S_IEXEC >> 6) ) ? AR_USEARCH : 0;
117 /* --------------------------------
120 void utommode( stat, ma )
126 mode = stat->st_mode;
127 ma->ma_world = utombits( mode );
130 ma->ma_group = utombits( mode );
133 ma->ma_owner = utombits( mode );
135 /* ma_user is a union of all permissions but we must follow
138 if ( (uuid == stat->st_uid) || (uuid == 0)) {
139 ma->ma_user = ma->ma_owner | AR_UOWN;
141 else if ( gmem( stat->st_gid )) {
142 ma->ma_user = ma->ma_group;
145 ma->ma_user = ma->ma_world;
149 * There are certain things the mac won't try if you don't have
150 * the "owner" bit set, even tho you can do these things on unix wiht
151 * only write permission. What were the things?
154 * ditto seems to care if st_uid is 0 ?
155 * was ma->ma_user & AR_UWRITE
156 * but 0 as owner is a can of worms.
158 if ( !stat->st_uid ) {
159 ma->ma_user |= AR_UOWN;
167 * Calculate the mode for a directory using a stat() call to
168 * estimate permission.
170 * Note: the previous method, using access(), does not work correctly
172 * FIXME what about ACL?
174 * dir parameter is used by AFS
176 void accessmode( path, ma, dir, st )
185 ma->ma_user = ma->ma_owner = ma->ma_world = ma->ma_group = 0;
187 if (stat(path, &sb) != 0)
200 for ( i = 0; i < ngroups; i++ ) {
201 if ( groups[ i ] == gid ) {
208 static mode_t mtoubits( bits )
215 mode |= ( bits & AR_UREAD ) ? ( (S_IREAD | S_IEXEC) >> 6 ) : 0;
216 mode |= ( bits & AR_UWRITE ) ? ( (S_IWRITE | S_IEXEC) >> 6 ) : 0;
217 /* I don't think there's a way to set the SEARCH bit by itself on a Mac
218 mode |= ( bits & AR_USEARCH ) ? ( S_IEXEC >> 6 ) : 0; */
223 /* ----------------------------------
224 from the finder's share windows (menu--> File--> sharing...)
225 and from AFP 3.0 spec page 63
226 the mac mode should be save somewhere
228 mode_t mtoumode( ma )
234 mode |= mtoubits( ma->ma_owner |ma->ma_world);
237 mode |= mtoubits( ma->ma_group |ma->ma_world);
240 mode |= mtoubits( ma->ma_world );
245 /* ----------------------------- */
246 char *fullpathname(const char *name)
248 static char wd[ MAXPATHLEN + 1];
250 if ( getcwd( wd , MAXPATHLEN) ) {
251 strlcat(wd, "/", MAXPATHLEN);
252 strlcat(wd, name, MAXPATHLEN);
255 strlcpy(wd, name, MAXPATHLEN);
260 /* -----------------------------
261 a dropbox is a folder where w is set but not r eg:
262 rwx-wx-wx or rwx-wx--
263 rwx----wx (is not asked by a Mac with OS >= 8.0 ?)
265 static int stickydirmode(name, mode, dropbox)
273 /* Turn on the sticky bit if this is a drop box, also turn off the setgid bit */
277 if ( ( (mode & S_IWOTH) && !(mode & S_IROTH)) ||
278 ( (mode & S_IWGRP) && !(mode & S_IRGRP)) )
281 if ( seteuid(0) < 0) {
282 LOG(log_error, logtype_afpd, "stickydirmode: unable to seteuid root: %s", strerror(errno));
284 if ( (retval=chmod( name, ( (DIRBITS | mode | S_ISVTX) & ~default_options.umask) )) < 0) {
285 LOG(log_error, logtype_afpd, "stickydirmode: chmod \"%s\": %s", fullpathname(name), strerror(errno) );
288 LOG(log_info, logtype_afpd, "stickydirmode: (debug) chmod \"%s\": %s", fullpathname(name), strerror(retval) );
295 #endif /* DROPKLUDGE */
298 * Ignore EPERM errors: We may be dealing with a directory that is
299 * group writable, in which case chmod will fail.
301 if ( (chmod( name, (DIRBITS | mode) & ~default_options.umask ) < 0) && errno != EPERM) {
302 LOG(log_error, logtype_afpd, "stickydirmode: chmod \"%s\": %s", fullpathname(name), strerror(errno) );
309 /* ------------------------- */
310 int dir_rx_set(mode_t mode)
312 return (mode & (S_IXUSR | S_IRUSR)) == (S_IXUSR | S_IRUSR);
315 #define EXEC_MODE (S_IXGRP | S_IXUSR | S_IXOTH)
317 int setdeskmode( mode )
320 char wd[ MAXPATHLEN + 1];
322 char modbuf[ 12 + 1], *m;
323 struct dirent *deskp, *subp;
326 if (!dir_rx_set(mode)) {
327 /* want to remove read and search access to owner it will screw the volume */
330 if ( getcwd( wd , MAXPATHLEN) == NULL ) {
333 if ( chdir( ".AppleDesktop" ) < 0 ) {
336 if (( desk = opendir( "." )) == NULL ) {
337 if ( chdir( wd ) < 0 ) {
338 LOG(log_error, logtype_afpd, "setdeskmode: chdir %s: %s", wd, strerror(errno) );
342 for ( deskp = readdir( desk ); deskp != NULL; deskp = readdir( desk )) {
343 if ( strcmp( deskp->d_name, "." ) == 0 ||
344 strcmp( deskp->d_name, ".." ) == 0 || strlen( deskp->d_name ) > 2 ) {
347 strcpy( modbuf, deskp->d_name );
348 strcat( modbuf, "/" );
349 m = strchr( modbuf, '\0' );
350 if (( sub = opendir( deskp->d_name )) == NULL ) {
353 for ( subp = readdir( sub ); subp != NULL; subp = readdir( sub )) {
354 if ( strcmp( subp->d_name, "." ) == 0 ||
355 strcmp( subp->d_name, ".." ) == 0 ) {
359 strcat( modbuf, subp->d_name );
360 /* XXX: need to preserve special modes */
361 if (stat(modbuf, &st) < 0) {
362 LOG(log_error, logtype_afpd, "setdeskmode: stat %s: %s",fullpathname(modbuf), strerror(errno) );
366 if (S_ISDIR(st.st_mode)) {
367 if ( chmod( modbuf, (DIRBITS | mode) & ~default_options.umask ) < 0 && errno != EPERM ) {
368 LOG(log_error, logtype_afpd, "setdeskmode: chmod %s: %s",fullpathname(modbuf), strerror(errno) );
370 } else if ( chmod( modbuf, mode & ~(default_options.umask | EXEC_MODE) ) < 0 && errno != EPERM ) {
371 LOG(log_error, logtype_afpd, "setdeskmode: chmod %s: %s",fullpathname(modbuf), strerror(errno) );
376 /* XXX: need to preserve special modes */
377 if ( chmod( deskp->d_name, (DIRBITS | mode) & ~default_options.umask ) < 0 && errno != EPERM ) {
378 LOG(log_error, logtype_afpd, "setdeskmode: chmod %s: %s",fullpathname(deskp->d_name), strerror(errno) );
382 if ( chdir( wd ) < 0 ) {
383 LOG(log_error, logtype_afpd, "setdeskmode: chdir %s: %s", wd, strerror(errno) );
386 /* XXX: need to preserve special modes */
387 if ( chmod( ".AppleDesktop", (DIRBITS | mode) & ~default_options.umask ) < 0 && errno != EPERM ) {
388 LOG(log_error, logtype_afpd, "setdeskmode: chmod %s: %s", fullpathname(".AppleDesktop"),strerror(errno) );
393 /* --------------------- */
394 int setfilunixmode (vol, path, mode)
395 const struct vol *vol;
399 if (!path->st_valid) {
403 if (path->st_errno) {
409 if (setfilmode( path->u_name, mode, &path->st) < 0)
411 /* we need to set write perm if read set for resource fork */
412 return setfilmode(vol->ad_path( path->u_name, ADFLAGS_HF ), ad_hf_mode(mode), &path->st);
415 /* --------------------- */
416 int setfilmode(name, mode, st)
422 mode_t mask = S_IRWXU | S_IRWXG | S_IRWXO; /* rwx for owner group and other, by default */
425 if (stat(name, &sb) != 0)
430 mode |= st->st_mode & ~mask; /* keep other bits from previous mode */
431 if ( chmod( name, mode & ~default_options.umask ) < 0 && errno != EPERM ) {
437 /* --------------------- */
438 int setdirunixmode( vol, name, mode )
439 const struct vol *vol;
443 char *adouble = vol->ad_path( name, ADFLAGS_DIR );
445 int dropbox = (vol->v_flags & AFPVOL_DROPBOX);
448 if (dir_rx_set(mode)) {
449 /* extending right? dir first then .AppleDouble */
450 if ( stickydirmode(name, DIRBITS | mode, dropbox) < 0 )
452 if (vol->v_adouble != AD_VERSION2_OSX) {
453 if (stickydirmode(ad_dir(adouble), DIRBITS | mode, dropbox) < 0 && !vol_noadouble(vol)) {
458 if (setfilmode(adouble, ad_hf_mode(mode), NULL) < 0 && !vol_noadouble(vol)) {
461 if (!dir_rx_set(mode)) {
462 if (vol->v_adouble != AD_VERSION2_OSX) {
463 if (stickydirmode(ad_dir(adouble), DIRBITS | mode, dropbox) < 0 && !vol_noadouble(vol)) {
467 if ( stickydirmode(name, DIRBITS | mode, dropbox) < 0 )
473 /* --------------------- */
474 int setdirmode( vol, name, mode )
475 const struct vol *vol;
479 char buf[ MAXPATHLEN + 1];
485 int osx = vol->v_adouble == AD_VERSION2_OSX;
486 int dropbox = (vol->v_flags & AFPVOL_DROPBOX);
487 char *adouble = vol->ad_path( name, ADFLAGS_DIR );
488 char *adouble_p = ad_dir(adouble);
491 hf_mode = ad_hf_mode(mode);
493 if (dir_rx_set(mode)) {
494 /* extending right? dir first then .AppleDouble */
495 if ( stickydirmode(name, DIRBITS | mode, dropbox) < 0 )
498 if (stickydirmode(adouble_p, DIRBITS | mode, dropbox) < 0 && !vol_noadouble(vol)) {
504 if (( dir = opendir( name )) == NULL ) {
505 LOG(log_error, logtype_afpd, "setdirmode: opendir: %s", fullpathname(name), strerror(errno) );
509 for ( dirp = readdir( dir ); dirp != NULL; dirp = readdir( dir )) {
511 if ( *dirp->d_name == '.' && (!osx || dirp->d_name[1] != '_')) {
514 if ( stat( dirp->d_name, &st ) < 0 ) {
515 LOG(log_error, logtype_afpd, "setdirmode: stat %s: %s",dirp->d_name, strerror(errno) );
519 if (!S_ISDIR(st.st_mode)) {
520 int setmode = (osx && *dirp->d_name == '.')?hf_mode:mode;
522 if (setfilmode(dirp->d_name, setmode, &st) < 0) {
523 LOG(log_error, logtype_afpd, "setdirmode: chmod %s: %s",dirp->d_name, strerror(errno) );
528 /* Don't change subdir perm */
529 else if (S_ISDIR(st.st_mode)) {
530 if (stickydirmode(dirp->d_name, DIRBITS | mode, dropbox) < 0)
532 } else if (stickydirmode(dirp->d_name, mode, dropbox) < 0)
540 goto setdirmode_noadouble;
543 /* change perm of .AppleDouble's files
545 if (( dir = opendir( adouble_p )) == NULL ) {
546 if (vol_noadouble(vol))
547 goto setdirmode_noadouble;
548 LOG(log_error, logtype_afpd, "setdirmode: opendir %s: %s", fullpathname(".AppleDouble"),strerror(errno) );
551 strcpy( buf, adouble_p);
553 m = strchr( buf, '\0' );
554 for ( dirp = readdir( dir ); dirp != NULL; dirp = readdir( dir )) {
555 if ( strcmp( dirp->d_name, "." ) == 0 ||
556 strcmp( dirp->d_name, ".." ) == 0 ) {
560 strcat( buf, dirp->d_name );
562 if ( stat( buf, &st ) < 0 ) {
563 LOG(log_error, logtype_afpd, "setdirmode: stat %s: %s", buf, strerror(errno) );
566 if (!S_ISDIR(st.st_mode)) {
567 if (setfilmode(buf, hf_mode , &st) < 0) {
568 /* FIXME what do we do then? */
574 if (!dir_rx_set(mode)) {
575 /* XXX: need to preserve special modes */
576 if (stickydirmode(adouble_p, DIRBITS | mode, dropbox) < 0 ) {
581 setdirmode_noadouble:
582 if (!dir_rx_set(mode)) {
583 if ( stickydirmode(name, DIRBITS | mode, dropbox) < 0 )
589 int setdeskowner( uid, gid )
593 char wd[ MAXPATHLEN + 1];
594 char modbuf[12 + 1], *m;
595 struct dirent *deskp, *subp;
598 if ( getcwd( wd, MAXPATHLEN ) == NULL ) {
601 if ( chdir( ".AppleDesktop" ) < 0 ) {
604 if (( desk = opendir( "." )) == NULL ) {
605 if ( chdir( wd ) < 0 ) {
606 LOG(log_error, logtype_afpd, "setdeskowner: chdir %s: %s", wd, strerror(errno) );
610 for ( deskp = readdir( desk ); deskp != NULL; deskp = readdir( desk )) {
611 if ( strcmp( deskp->d_name, "." ) == 0 ||
612 strcmp( deskp->d_name, ".." ) == 0 ||
613 strlen( deskp->d_name ) > 2 ) {
616 strcpy( modbuf, deskp->d_name );
617 strcat( modbuf, "/" );
618 m = strchr( modbuf, '\0' );
619 if (( sub = opendir( deskp->d_name )) == NULL ) {
622 for ( subp = readdir( sub ); subp != NULL; subp = readdir( sub )) {
623 if ( strcmp( subp->d_name, "." ) == 0 ||
624 strcmp( subp->d_name, ".." ) == 0 ) {
628 strcat( modbuf, subp->d_name );
629 /* XXX: add special any uid, ignore group bits */
630 if ( chown( modbuf, uid, gid ) < 0 && errno != EPERM ) {
631 LOG(log_error, logtype_afpd, "setdeskown: chown %s: %s", fullpathname(modbuf), strerror(errno) );
635 /* XXX: add special any uid, ignore group bits */
636 if ( chown( deskp->d_name, uid, gid ) < 0 && errno != EPERM ) {
637 LOG(log_error, logtype_afpd, "setdeskowner: chown %s: %s",
638 deskp->d_name, strerror(errno) );
642 if ( chdir( wd ) < 0 ) {
643 LOG(log_error, logtype_afpd, "setdeskowner: chdir %s: %s", wd, strerror(errno) );
646 if ( chown( ".AppleDesktop", uid, gid ) < 0 && errno != EPERM ) {
647 LOG(log_error, logtype_afpd, "setdeskowner: chown %s: %s", fullpathname(".AppleDouble"), strerror(errno) );
652 /* ----------------------------- */
653 int setfilowner(vol, uid, gid, path)
654 const struct vol *vol;
662 if (!path->st_valid) {
666 if (path->st_errno) {
670 if ( chown( path->u_name, uid, gid ) < 0 && errno != EPERM ) {
671 LOG(log_debug, logtype_afpd, "setfilowner: chown %d/%d %s: %s",
672 uid, gid, path->u_name, strerror(errno) );
676 ad_p = vol->ad_path( path->u_name, ADFLAGS_HF );
678 if ( stat( ad_p, &st ) < 0 ) {
682 if ( chown( ad_p, uid, gid ) < 0 &&
684 LOG(log_debug, logtype_afpd, "setfilowner: chown %d/%d %s: %s",
685 uid, gid, ad_p, strerror(errno) );
692 /* ---------------------------------
693 * uid/gid == 0 need to be handled as special cases. they really mean
694 * that user/group should inherit from other, but that doesn't fit
695 * into the unix permission scheme. we can get around this by
696 * co-opting some bits. */
697 int setdirowner(vol, name, uid, gid )
698 const struct vol *vol;
703 char buf[ MAXPATHLEN + 1];
708 int osx = vol->v_adouble == AD_VERSION2_OSX;
709 int noadouble = vol_noadouble(vol);
713 if (( dir = opendir( name )) == NULL ) {
716 for ( dirp = readdir( dir ); dirp != NULL; dirp = readdir( dir )) {
717 if ( *dirp->d_name == '.' && (!osx || dirp->d_name[1] != '_')) {
720 if ( stat( dirp->d_name, &st ) < 0 ) {
721 LOG(log_error, logtype_afpd, "setdirowner: stat %s: %s",
722 fullpathname(dirp->d_name), strerror(errno) );
725 if (( st.st_mode & S_IFMT ) == S_IFREG ) {
726 if ( chown( dirp->d_name, uid, gid ) < 0 && errno != EPERM ) {
727 LOG(log_debug, logtype_afpd, "setdirowner: chown %s: %s",
728 fullpathname(dirp->d_name), strerror(errno) );
729 /* return ( -1 ); Sometimes this is okay */
736 goto setdirowner_noadouble;
739 adouble = vol->ad_path( name, ADFLAGS_DIR );
740 adouble_p = ad_dir(adouble);
741 if (( dir = opendir( adouble_p )) == NULL ) {
743 goto setdirowner_noadouble;
746 strcpy( buf, adouble_p );
748 m = strchr( buf, '\0' );
749 for ( dirp = readdir( dir ); dirp != NULL; dirp = readdir( dir )) {
750 if ( strcmp( dirp->d_name, "." ) == 0 ||
751 strcmp( dirp->d_name, ".." ) == 0 ) {
755 strcat( buf, dirp->d_name );
756 if ( chown( buf, uid, gid ) < 0 && errno != EPERM ) {
757 LOG(log_debug, logtype_afpd, "setdirowner: chown %d/%d %s: %s",
758 uid, gid, fullpathname(buf), strerror(errno) );
759 /* return ( -1 ); Sometimes this is okay */
765 * We cheat: we know that chown doesn't do anything.
767 if ( stat( ".AppleDouble", &st ) < 0 ) {
768 LOG(log_error, logtype_afpd, "setdirowner: stat %s: %s", fullpathname(".AppleDouble"), strerror(errno) );
771 if ( gid && gid != st.st_gid && chown( ".AppleDouble", uid, gid ) < 0 &&
773 LOG(log_debug, logtype_afpd, "setdirowner: chown %d/%d %s: %s",
774 uid, gid,fullpathname(".AppleDouble"), strerror(errno) );
775 /* return ( -1 ); Sometimes this is okay */
778 setdirowner_noadouble:
779 if ( stat( ".", &st ) < 0 ) {
782 if ( gid && gid != st.st_gid && chown( ".", uid, gid ) < 0 &&
784 LOG(log_debug, logtype_afpd, "setdirowner: chown %d/%d %s: %s",
785 uid, gid, fullpathname("."), strerror(errno) );
792 /* recursive chown()ing of a directory */
793 static int recursive_chown(const char *path, uid_t uid, gid_t gid) {
796 struct dirent *entry;
799 char newpath[PATH_MAX+1];
800 newpath[PATH_MAX] = '\0';
802 if (chown(path, uid, gid) < 0) {
803 LOG(log_error, logtype_afpd, "cannot chown() file [%s] (uid = %d): %s", path, uid, strerror(errno));
807 if (stat(path, &sbuf) < 0) {
808 LOG(log_error, logtype_afpd, "cannot chown() file [%s] (uid = %d): %s", path, uid, strerror(errno));
812 if (S_ISDIR(sbuf.st_mode)) {
813 odir = opendir(path);
815 LOG(log_error, logtype_afpd, "cannot opendir() [%s] (uid = %d): %s", path, uid, strerror(errno));
816 goto recursive_chown_end;
818 while (NULL != (entry=readdir(odir)) ) {
819 name = entry->d_name;
820 if (name[0] == '.' && name[1] == '\0')
822 if (name[0] == '.' && name[1] == '.' && name[2] == '\0')
824 sprintf(newpath, "%s/%s", path, name);
825 if (recursive_chown(newpath, uid, gid) < 0)
838 /* This is equivalent of unix rename(). */
839 int unix_rename(const char *oldpath, const char *newpath)
842 char pd_name[PATH_MAX+1];
848 if (rename(oldpath, newpath) < 0)
851 for (i = 0; i <= PATH_MAX && newpath[i] != '\0'; i++)
852 pd_name[i] = newpath[i];
855 while (i > 0 && pd_name[i] != '/') i--;
856 if (pd_name[i] == '/') i++;
858 pd_name[i++] = '.'; pd_name[i++] = '\0';
860 if (stat(pd_name, &pd_stat) < 0) {
861 LOG(log_error, logtype_afpd, "stat() of parent dir failed: pd_name = %s, uid = %d: %s",
862 pd_name, geteuid(), strerror(errno));
866 /* So we have SGID bit set... */
867 if ((S_ISGID & pd_stat.st_mode) != 0) {
870 LOG(log_error, logtype_afpd, "seteuid() failed: %s", strerror(errno));
871 if (recursive_chown(newpath, uid, pd_stat.st_gid) < 0)
872 LOG(log_error, logtype_afpd, "chown() of parent dir failed: newpath=%s, uid=%d: %s",
873 pd_name, geteuid(), strerror(errno));