2 * $Id: unix.c,v 1.40 2003-01-07 15:55:22 rlewczuk Exp $
4 * Copyright (c) 1990,1993 Regents of The University of Michigan.
5 * All Rights Reserved. See COPYRIGHT.
10 #endif /* HAVE_CONFIG_H */
16 #include <sys/types.h>
17 #include <sys/param.h>
19 #include <atalk/logger.h>
20 #include <netatalk/endian.h>
23 #include <atalk/adouble.h>
24 #include <atalk/afp.h>
29 #else /* STDC_HEADERS */
33 #endif /* HAVE_STRCHR */
34 char *strchr (), *strrchr ();
36 #define memcpy(d,s,n) bcopy ((s), (d), (n))
37 #define memmove(d,s,n) bcopy ((s), (d), (n))
38 #endif /* ! HAVE_MEMCPY */
39 #endif /* STDC_HEADERS */
43 #endif /* HAVE_FCNTL_H */
45 #include "directory.h"
50 * Get the free space on a partition.
52 int ustatfs_getvolspace( vol, bfree, btotal, bsize )
53 const struct vol *vol;
54 VolSpace *bfree, *btotal;
57 VolSpace maxVolSpace = (~(VolSpace)0);
66 if ( statfs( vol->v_path, &sfs ) < 0 ) {
67 LOG(log_error, logtype_afpd, "ustatfs_getvolspace unable to stat %s", vol->v_path);
68 return( AFPERR_PARAM );
72 *bfree = (VolSpace) sfs.fd_req.bfreen;
75 *bfree = (VolSpace) sfs.f_bavail;
76 *bsize = sfs.f_frsize;
79 if ( *bfree > maxVolSpace / *bsize ) {
87 ( sfs.fd_req.btot - ( sfs.fd_req.bfree - sfs.fd_req.bfreen ));
90 ( sfs.f_blocks - ( sfs.f_bfree - sfs.f_bavail ));
93 /* see similar block above comments */
94 if ( *btotal > maxVolSpace / *bsize ) {
95 *btotal = maxVolSpace;
103 static __inline__ int utombits( bits )
110 mbits |= ( bits & ( S_IREAD >> 6 )) ? (AR_UREAD | AR_USEARCH) : 0;
111 mbits |= ( bits & ( S_IWRITE >> 6 )) ? AR_UWRITE : 0;
112 /* Do we really need this?
113 mbits |= ( bits & ( S_IEXEC >> 6) ) ? AR_USEARCH : 0; */
118 /* --------------------------------
121 void utommode( stat, ma )
128 mode = stat->st_mode;
129 ma->ma_world = utombits( mode );
132 ma->ma_group = utombits( mode );
135 ma->ma_owner = utombits( mode );
137 /* ma_user is a union of all permissions */
139 if ( (uuid == stat->st_uid) || (uuid == 0)) {
141 ma->ma_user = ma->ma_owner | AR_UOWN;
143 if ( gmem( stat->st_gid )) {
145 ma->ma_user |= ma->ma_group;
148 /* We are the directory owner or we are in the group owner.
149 * If we don't have a perm we need to remove it from ma_world.
151 * eg if perms are rwx--Sr-x and I'm not the user owner but I'm in the group
152 * I DON'T have read and search access on the directory.
154 if (!(ma->ma_user & AR_UWRITE))
155 ma->ma_world &= ~AR_UWRITE;
156 if (!(ma->ma_user & AR_UREAD))
157 ma->ma_world &= ~AR_UREAD;
158 if (!(ma->ma_user & AR_USEARCH))
159 ma->ma_world &= ~AR_USEARCH;
162 ma->ma_user |= ma->ma_world;
165 * There are certain things the mac won't try if you don't have
166 * the "owner" bit set, even tho you can do these things on unix wiht
167 * only write permission. What were the things?
169 * FIXME and so what ?
172 if ( ma->ma_user & AR_UWRITE ) {
173 ma->ma_user |= AR_UOWN;
180 * Calculate the mode for a directory using a stat() call to
181 * estimate permission.
183 * Note: the previous method, using access(), does not work correctly
185 * FIXME what about ACL?
187 void accessmode( path, ma, dir, st )
196 ma->ma_user = ma->ma_owner = ma->ma_world = ma->ma_group = 0;
198 if (stat(path, &sb) != 0)
211 for ( i = 0; i < ngroups; i++ ) {
212 if ( groups[ i ] == gid ) {
219 static __inline__ mode_t mtoubits( bits )
226 mode |= ( bits & AR_UREAD ) ? ( (S_IREAD | S_IEXEC) >> 6 ) : 0;
227 mode |= ( bits & AR_UWRITE ) ? ( (S_IWRITE | S_IEXEC) >> 6 ) : 0;
228 /* I don't think there's a way to set the SEARCH bit by itself on a Mac
229 mode |= ( bits & AR_USEARCH ) ? ( S_IEXEC >> 6 ) : 0; */
234 /* ----------------------------------
235 from the finder's share windows (menu--> File--> sharing...)
236 and from AFP 3.0 spec page 63
237 the mac mode should be save somewhere
239 mode_t mtoumode( ma )
245 mode |= mtoubits( ma->ma_owner |ma->ma_world);
248 mode |= mtoubits( ma->ma_group |ma->ma_world);
251 mode |= mtoubits( ma->ma_world );
257 a dropbox is a folder where w is set but not r eg:
258 rwx-wx-wx or rwx-wx--
259 rwx----wx (is not asked by a Mac with OS >= 8.0 ?)
261 static int stickydirmode(name, mode, dropbox)
269 /* Turn on the sticky bit if this is a drop box, also turn off the setgid bit */
273 if ( ( (mode & S_IWOTH) && !(mode & S_IROTH)) ||
274 ( (mode & S_IWGRP) && !(mode & S_IRGRP)) )
277 if ( seteuid(0) < 0) {
278 LOG(log_error, logtype_afpd, "stickydirmode: unable to seteuid root: %s", strerror(errno));
280 if ( (retval=chmod( name, ( (DIRBITS | mode | S_ISVTX) & ~default_options.umask) )) < 0) {
281 LOG(log_error, logtype_afpd, "stickydirmode: chmod \"%s\": %s", name, strerror(errno) );
284 LOG(log_info, logtype_afpd, "stickydirmode: (debug) chmod \"%s\": %s", name, strerror(retval) );
291 #endif /* DROPKLUDGE */
294 * Ignore EPERM errors: We may be dealing with a directory that is
295 * group writable, in which case chmod will fail.
297 if ( (chmod( name, (DIRBITS | mode) & ~default_options.umask ) < 0) && errno != EPERM) {
298 LOG(log_error, logtype_afpd, "stickydirmode: chmod \"%s\": %s",name, strerror(errno) );
305 int setdeskmode( mode )
308 char wd[ MAXPATHLEN + 1];
310 char modbuf[ 12 + 1], *m;
311 struct dirent *deskp, *subp;
314 if ( getcwd( wd , MAXPATHLEN) == NULL ) {
317 if ( chdir( ".AppleDesktop" ) < 0 ) {
320 if (( desk = opendir( "." )) == NULL ) {
321 if ( chdir( wd ) < 0 ) {
322 LOG(log_error, logtype_afpd, "setdeskmode: chdir %s: %s", wd, strerror(errno) );
326 for ( deskp = readdir( desk ); deskp != NULL; deskp = readdir( desk )) {
327 if ( strcmp( deskp->d_name, "." ) == 0 ||
328 strcmp( deskp->d_name, ".." ) == 0 || strlen( deskp->d_name ) > 2 ) {
331 strcpy( modbuf, deskp->d_name );
332 strcat( modbuf, "/" );
333 m = strchr( modbuf, '\0' );
334 if (( sub = opendir( deskp->d_name )) == NULL ) {
337 for ( subp = readdir( sub ); subp != NULL; subp = readdir( sub )) {
338 if ( strcmp( subp->d_name, "." ) == 0 ||
339 strcmp( subp->d_name, ".." ) == 0 ) {
343 strcat( modbuf, subp->d_name );
344 /* XXX: need to preserve special modes */
345 if (stat(modbuf, &st) < 0) {
346 LOG(log_error, logtype_afpd, "setdeskmode: stat %s: %s",
347 modbuf, strerror(errno) );
351 if (S_ISDIR(st.st_mode)) {
352 if ( chmod( modbuf, (DIRBITS | mode) & ~default_options.umask ) < 0 && errno != EPERM ) {
353 LOG(log_error, logtype_afpd, "setdeskmode: chmod %s: %s",
354 modbuf, strerror(errno) );
356 } else if ( chmod( modbuf, mode & ~default_options.umask ) < 0 && errno != EPERM ) {
357 LOG(log_error, logtype_afpd, "setdeskmode: chmod %s: %s",
358 modbuf, strerror(errno) );
363 /* XXX: need to preserve special modes */
364 if ( chmod( deskp->d_name, (DIRBITS | mode) & ~default_options.umask ) < 0 && errno != EPERM ) {
365 LOG(log_error, logtype_afpd, "setdeskmode: chmod %s: %s",
366 deskp->d_name, strerror(errno) );
370 if ( chdir( wd ) < 0 ) {
371 LOG(log_error, logtype_afpd, "setdeskmode: chdir %s: %s", wd, strerror(errno) );
374 /* XXX: need to preserve special modes */
375 if ( chmod( ".AppleDesktop", (DIRBITS | mode) & ~default_options.umask ) < 0 && errno != EPERM ) {
376 LOG(log_error, logtype_afpd, "setdeskmode: chmod .AppleDesktop: %s", strerror(errno) );
381 int setfilmode(name, mode, st)
387 mode_t mask = S_IRUSR |S_IWUSR | S_IRGRP | S_IWGRP |S_IROTH | S_IWOTH;
390 if (stat(name, &sb) != 0)
394 mode &= mask; /* keep only rw-rw-rw in mode */
395 mode |= st->st_mode & ~mask; /* keep other bits from previous mode */
396 if ( chmod( name, mode & ~default_options.umask ) < 0 && errno != EPERM ) {
402 int setdirmode( mode, noadouble, dropbox )
407 char buf[ MAXPATHLEN + 1];
413 if (( dir = opendir( "." )) == NULL ) {
414 LOG(log_error, logtype_afpd, "setdirmode: opendir .: %s", strerror(errno) );
418 for ( dirp = readdir( dir ); dirp != NULL; dirp = readdir( dir )) {
419 if ( *dirp->d_name == '.' ) {
422 if ( stat( dirp->d_name, &st ) < 0 ) {
423 LOG(log_error, logtype_afpd, "setdirmode: stat %s: %s",
424 dirp->d_name, strerror(errno) );
428 if (S_ISREG(st.st_mode)) {
429 if (setfilmode(dirp->d_name, mode, &st) < 0) {
430 LOG(log_error, logtype_afpd, "setdirmode: chmod %s: %s",
431 dirp->d_name, strerror(errno) );
436 /* XXX: need to preserve special modes */
437 else if (S_ISDIR(st.st_mode)) {
438 if (stickydirmode(dirp->d_name, DIRBITS | mode, dropbox) < 0)
440 } else if (stickydirmode(dirp->d_name, mode, dropbox) < 0)
447 /* change perm of .AppleDouble's files
449 if (( dir = opendir( ".AppleDouble" )) == NULL ) {
451 goto setdirmode_noadouble;
452 LOG(log_error, logtype_afpd, "setdirmode: opendir .AppleDouble: %s", strerror(errno) );
455 strcpy( buf, ".AppleDouble" );
457 m = strchr( buf, '\0' );
458 for ( dirp = readdir( dir ); dirp != NULL; dirp = readdir( dir )) {
459 if ( strcmp( dirp->d_name, "." ) == 0 ||
460 strcmp( dirp->d_name, ".." ) == 0 ) {
464 strcat( buf, dirp->d_name );
466 if ( stat( buf, &st ) < 0 ) {
467 LOG(log_error, logtype_afpd, "setdirmode: stat %s: %s", buf, strerror(errno) );
470 if (S_ISREG(st.st_mode)) {
471 if (setfilmode(buf, ad_hf_mode(mode), &st) < 0) {
472 /* FIXME what do we do then? */
478 /* XXX: use special bits to tag directory permissions */
480 /* XXX: need to preserve special modes */
481 if ( stickydirmode(".AppleDouble", DIRBITS | mode, dropbox) < 0 )
484 setdirmode_noadouble:
485 /* XXX: need to preserve special modes */
486 if ( stickydirmode(".", DIRBITS | mode, dropbox) < 0 )
491 int setdeskowner( uid, gid )
495 char wd[ MAXPATHLEN + 1];
496 char modbuf[12 + 1], *m;
497 struct dirent *deskp, *subp;
500 if ( getcwd( wd, MAXPATHLEN ) == NULL ) {
503 if ( chdir( ".AppleDesktop" ) < 0 ) {
506 if (( desk = opendir( "." )) == NULL ) {
507 if ( chdir( wd ) < 0 ) {
508 LOG(log_error, logtype_afpd, "setdeskowner: chdir %s: %s", wd, strerror(errno) );
512 for ( deskp = readdir( desk ); deskp != NULL; deskp = readdir( desk )) {
513 if ( strcmp( deskp->d_name, "." ) == 0 ||
514 strcmp( deskp->d_name, ".." ) == 0 ||
515 strlen( deskp->d_name ) > 2 ) {
518 strcpy( modbuf, deskp->d_name );
519 strcat( modbuf, "/" );
520 m = strchr( modbuf, '\0' );
521 if (( sub = opendir( deskp->d_name )) == NULL ) {
524 for ( subp = readdir( sub ); subp != NULL; subp = readdir( sub )) {
525 if ( strcmp( subp->d_name, "." ) == 0 ||
526 strcmp( subp->d_name, ".." ) == 0 ) {
530 strcat( modbuf, subp->d_name );
531 /* XXX: add special any uid, ignore group bits */
532 if ( chown( modbuf, uid, gid ) < 0 && errno != EPERM ) {
533 LOG(log_error, logtype_afpd, "setdeskown: chown %s: %s",
534 modbuf, strerror(errno) );
538 /* XXX: add special any uid, ignore group bits */
539 if ( chown( deskp->d_name, uid, gid ) < 0 && errno != EPERM ) {
540 LOG(log_error, logtype_afpd, "setdeskowner: chown %s: %s",
541 deskp->d_name, strerror(errno) );
545 if ( chdir( wd ) < 0 ) {
546 LOG(log_error, logtype_afpd, "setdeskowner: chdir %s: %s", wd, strerror(errno) );
549 if ( chown( ".AppleDesktop", uid, gid ) < 0 && errno != EPERM ) {
550 LOG(log_error, logtype_afpd, "setdeskowner: chown .AppleDesktop: %s",
557 /* uid/gid == 0 need to be handled as special cases. they really mean
558 * that user/group should inherit from other, but that doesn't fit
559 * into the unix permission scheme. we can get around this by
560 * co-opting some bits. */
561 int setdirowner( uid, gid, noadouble )
566 char buf[ MAXPATHLEN + 1];
572 if (( dir = opendir( "." )) == NULL ) {
575 for ( dirp = readdir( dir ); dirp != NULL; dirp = readdir( dir )) {
576 if ( *dirp->d_name == '.' ) {
579 if ( stat( dirp->d_name, &st ) < 0 ) {
580 LOG(log_error, logtype_afpd, "setdirowner: stat %s: %s",
581 dirp->d_name, strerror(errno) );
584 if (( st.st_mode & S_IFMT ) == S_IFREG ) {
585 if ( chown( dirp->d_name, uid, gid ) < 0 && errno != EPERM ) {
586 LOG(log_debug, logtype_afpd, "setdirowner: chown %s: %s",
587 dirp->d_name, strerror(errno) );
588 /* return ( -1 ); Sometimes this is okay */
593 if (( dir = opendir( ".AppleDouble" )) == NULL ) {
595 goto setdirowner_noadouble;
598 strcpy( buf, ".AppleDouble" );
600 m = strchr( buf, '\0' );
601 for ( dirp = readdir( dir ); dirp != NULL; dirp = readdir( dir )) {
602 if ( strcmp( dirp->d_name, "." ) == 0 ||
603 strcmp( dirp->d_name, ".." ) == 0 ) {
607 strcat( buf, dirp->d_name );
608 if ( chown( buf, uid, gid ) < 0 && errno != EPERM ) {
609 LOG(log_debug, logtype_afpd, "setdirowner: chown %d/%d %s: %s",
610 uid, gid, buf, strerror(errno) );
611 /* return ( -1 ); Sometimes this is okay */
617 * We cheat: we know that chown doesn't do anything.
619 if ( stat( ".AppleDouble", &st ) < 0 ) {
620 LOG(log_error, logtype_afpd, "setdirowner: stat .AppleDouble: %s", strerror(errno) );
623 if ( gid && gid != st.st_gid && chown( ".AppleDouble", uid, gid ) < 0 &&
625 LOG(log_debug, logtype_afpd, "setdirowner: chown %d/%d .AppleDouble: %s",
626 uid, gid, strerror(errno) );
627 /* return ( -1 ); Sometimes this is okay */
630 setdirowner_noadouble:
631 if ( stat( ".", &st ) < 0 ) {
634 if ( gid && gid != st.st_gid && chown( ".", uid, gid ) < 0 &&
636 LOG(log_debug, logtype_afpd, "setdirowner: chown %d/%d .: %s",
637 uid, gid, strerror(errno) );
643 /* recursive chown()ing of a directory */
644 static int recursive_chown(const char *path, uid_t uid, gid_t gid) {
647 struct dirent *entry;
650 char newpath[PATH_MAX+1];
651 newpath[PATH_MAX] = '\0';
653 if (chown(path, uid, gid) < 0) {
654 LOG(log_error, logtype_afpd, "cannot chown() file [%s] (uid = %d): %s\n", path, uid, strerror(errno));
658 if (stat(path, &sbuf) < 0) {
659 LOG(log_error, logtype_afpd, "cannot chown() file [%s] (uid = %d): %s\n", path, uid, strerror(errno));
663 if (S_ISDIR(sbuf.st_mode)) {
664 odir = opendir(path);
666 LOG(log_error, logtype_afpd, "cannot opendir() [%s] (uid = %d): %s\n", path, uid, strerror(errno));
667 goto recursive_chown_end;
669 while ((entry=readdir(odir)) != NULL) {
670 name = entry->d_name;
671 if (name[0] == '.' && name[1] == '\0')
673 if (name[0] == '.' && name[1] == '.' && name[2] == '\0')
675 sprintf(newpath, "%s/%s", path, name);
676 if (recursive_chown(newpath, uid, gid) < 0)
688 /* This is equivalent of unix rename(). */
689 int unix_rename(const char *oldpath, const char *newpath)
691 char pd_name[PATH_MAX+1];
696 if (rename(oldpath, newpath) < 0)
699 for (i = 0; i <= PATH_MAX && newpath[i] != '\0'; i++)
700 pd_name[i] = newpath[i];
703 while (i > 0 && pd_name[i] != '/') i--;
704 if (pd_name[i] == '/') i++;
706 pd_name[i++] = '.'; pd_name[i++] = '\0';
708 if (stat(pd_name, &pd_stat) < 0) {
709 LOG(log_error, logtype_afpd, "stat() of parent dir failed: pd_name = %s, uid = %d: %s\n",
710 pd_name, geteuid(), strerror(errno));
714 /* So we have SGID bit set... */
715 if ((S_ISGID & pd_stat.st_mode) != 0) {
718 LOG(log_error, logtype_afpd, "seteuid() failed: %s\n", strerror(errno));
719 if (recursive_chown(newpath, uid, pd_stat.st_gid) < 0)
720 LOG(log_error, logtype_afpd, "chown() of parent dir failed: newpath=%s, uid=%d: %s\n",
721 pd_name, geteuid(), strerror(errno));