X-Git-Url: https://git.gag.com/?a=blobdiff_plain;f=gnu%2Ffile-has-acl.c;h=b78a8793fe2f245229bdb92d0e3d74e3206a1004;hb=d30babc23b4f25be970ada2e63a50220a3672281;hp=946ff2d0e6f038d8d43e987ec7293bf630f85fe2;hpb=4aa85f09e755fc827cd5ab6225f20c83cd42245d;p=debian%2Ftar diff --git a/gnu/file-has-acl.c b/gnu/file-has-acl.c index 946ff2d0..b78a8793 100644 --- a/gnu/file-has-acl.c +++ b/gnu/file-has-acl.c @@ -1,8 +1,6 @@ -/* -*- buffer-read-only: t -*- vi: set ro: */ -/* DO NOT EDIT! GENERATED AUTOMATICALLY! */ /* Test whether a file has a nontrivial access control list. - Copyright (C) 2002-2003, 2005-2014 Free Software Foundation, Inc. + Copyright (C) 2002-2003, 2005-2015 Free Software Foundation, Inc. This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by @@ -31,465 +29,49 @@ #include "acl-internal.h" +#if GETXATTR_WITH_POSIX_ACLS +# include +# include +#endif -#if USE_ACL && HAVE_ACL_GET_FILE - -# if HAVE_ACL_TYPE_EXTENDED /* Mac OS X */ - -/* ACL is an ACL, from a file, stored as type ACL_TYPE_EXTENDED. - Return 1 if the given ACL is non-trivial. - Return 0 if it is trivial. */ -int -acl_extended_nontrivial (acl_t acl) -{ - /* acl is non-trivial if it is non-empty. */ - return (acl_entries (acl) > 0); -} - -# else /* Linux, FreeBSD, IRIX, Tru64 */ +/* Return 1 if NAME has a nontrivial access control list, + 0 if ACLs are not supported, or if NAME has no or only a base ACL, + and -1 (setting errno) on error. Note callers can determine + if ACLs are not supported as errno is set in that case also. + SB must be set to the stat buffer of NAME, + obtained through stat() or lstat(). */ -/* ACL is an ACL, from a file, stored as type ACL_TYPE_ACCESS. - Return 1 if the given ACL is non-trivial. - Return 0 if it is trivial, i.e. equivalent to a simple stat() mode. - Return -1 and set errno upon failure to determine it. */ int -acl_access_nontrivial (acl_t acl) +file_has_acl (char const *name, struct stat const *sb) { - /* acl is non-trivial if it has some entries other than for "user::", - "group::", and "other::". Normally these three should be present - at least, allowing us to write - return (3 < acl_entries (acl)); - but the following code is more robust. */ -# if HAVE_ACL_FIRST_ENTRY /* Linux, FreeBSD */ - - acl_entry_t ace; - int got_one; - - for (got_one = acl_get_entry (acl, ACL_FIRST_ENTRY, &ace); - got_one > 0; - got_one = acl_get_entry (acl, ACL_NEXT_ENTRY, &ace)) +#if USE_ACL + if (! S_ISLNK (sb->st_mode)) { - acl_tag_t tag; - if (acl_get_tag_type (ace, &tag) < 0) - return -1; - if (!(tag == ACL_USER_OBJ || tag == ACL_GROUP_OBJ || tag == ACL_OTHER)) - return 1; - } - return got_one; -# elif HAVE_ACL_TO_SHORT_TEXT /* IRIX */ - /* Don't use acl_get_entry: it is undocumented. */ +# if GETXATTR_WITH_POSIX_ACLS - int count = acl->acl_cnt; - int i; - - for (i = 0; i < count; i++) - { - acl_entry_t ace = &acl->acl_entry[i]; - acl_tag_t tag = ace->ae_tag; + ssize_t ret; - if (!(tag == ACL_USER_OBJ || tag == ACL_GROUP_OBJ - || tag == ACL_OTHER_OBJ)) + ret = getxattr (name, XATTR_NAME_POSIX_ACL_ACCESS, NULL, 0); + if (ret < 0 && errno == ENODATA) + ret = 0; + else if (ret > 0) return 1; - } - return 0; - -# elif HAVE_ACL_FREE_TEXT /* Tru64 */ - /* Don't use acl_get_entry: it takes only one argument and does not work. */ - - int count = acl->acl_num; - acl_entry_t ace; - for (ace = acl->acl_first; count > 0; ace = ace->next, count--) - { - acl_tag_t tag; - acl_perm_t perm; - - tag = ace->entry->acl_type; - if (!(tag == ACL_USER_OBJ || tag == ACL_GROUP_OBJ || tag == ACL_OTHER)) - return 1; - - perm = ace->entry->acl_perm; - /* On Tru64, perm can also contain non-standard bits such as - PERM_INSERT, PERM_DELETE, PERM_MODIFY, PERM_LOOKUP, ... */ - if ((perm & ~(ACL_READ | ACL_WRITE | ACL_EXECUTE)) != 0) - return 1; - } - return 0; - -# else - - errno = ENOSYS; - return -1; -# endif -} - -# endif - - -#elif USE_ACL && HAVE_FACL && defined GETACL /* Solaris, Cygwin, not HP-UX */ - -/* Test an ACL retrieved with GETACL. - Return 1 if the given ACL, consisting of COUNT entries, is non-trivial. - Return 0 if it is trivial, i.e. equivalent to a simple stat() mode. */ -int -acl_nontrivial (int count, aclent_t *entries) -{ - int i; - - for (i = 0; i < count; i++) - { - aclent_t *ace = &entries[i]; - - /* Note: If ace->a_type = USER_OBJ, ace->a_id is the st_uid from stat(). - If ace->a_type = GROUP_OBJ, ace->a_id is the st_gid from stat(). - We don't need to check ace->a_id in these cases. */ - if (!(ace->a_type == USER_OBJ - || ace->a_type == GROUP_OBJ - || ace->a_type == OTHER_OBJ - /* Note: Cygwin does not return a CLASS_OBJ ("mask:") entry - sometimes. */ - || ace->a_type == CLASS_OBJ)) - return 1; - } - return 0; -} - -# ifdef ACE_GETACL - -/* A shortcut for a bitmask. */ -# define NEW_ACE_WRITEA_DATA (NEW_ACE_WRITE_DATA | NEW_ACE_APPEND_DATA) - -/* Test an ACL retrieved with ACE_GETACL. - Return 1 if the given ACL, consisting of COUNT entries, is non-trivial. - Return 0 if it is trivial, i.e. equivalent to a simple stat() mode. */ -int -acl_ace_nontrivial (int count, ace_t *entries) -{ - int i; - - /* The flags in the ace_t structure changed in a binary incompatible way - when ACL_NO_TRIVIAL etc. were introduced in version 1.15. - How to distinguish the two conventions at runtime? - In the old convention, usually three ACEs have a_flags = ACE_OWNER / - ACE_GROUP / ACE_OTHER, in the range 0x0100..0x0400. In the new - convention, these values are not used. */ - int old_convention = 0; - - for (i = 0; i < count; i++) - if (entries[i].a_flags & (OLD_ACE_OWNER | OLD_ACE_GROUP | OLD_ACE_OTHER)) - { - old_convention = 1; - break; - } - - if (old_convention) - /* Running on Solaris 10. */ - for (i = 0; i < count; i++) - { - ace_t *ace = &entries[i]; - - /* Note: - If ace->a_flags = ACE_OWNER, ace->a_who is the st_uid from stat(). - If ace->a_flags = ACE_GROUP, ace->a_who is the st_gid from stat(). - We don't need to check ace->a_who in these cases. */ - if (!(ace->a_type == OLD_ALLOW - && (ace->a_flags == OLD_ACE_OWNER - || ace->a_flags == OLD_ACE_GROUP - || ace->a_flags == OLD_ACE_OTHER))) - return 1; - } - else - { - /* Running on Solaris 10 (newer version) or Solaris 11. */ - unsigned int access_masks[6] = - { - 0, /* owner@ deny */ - 0, /* owner@ allow */ - 0, /* group@ deny */ - 0, /* group@ allow */ - 0, /* everyone@ deny */ - 0 /* everyone@ allow */ - }; - - for (i = 0; i < count; i++) + if (ret == 0 && S_ISDIR (sb->st_mode)) { - ace_t *ace = &entries[i]; - unsigned int index1; - unsigned int index2; - - if (ace->a_type == NEW_ACE_ACCESS_ALLOWED_ACE_TYPE) - index1 = 1; - else if (ace->a_type == NEW_ACE_ACCESS_DENIED_ACE_TYPE) - index1 = 0; - else + ret = getxattr (name, XATTR_NAME_POSIX_ACL_DEFAULT, NULL, 0); + if (ret < 0 && errno == ENODATA) + ret = 0; + else if (ret > 0) return 1; - - if (ace->a_flags == NEW_ACE_OWNER) - index2 = 0; - else if (ace->a_flags == (NEW_ACE_GROUP | NEW_ACE_IDENTIFIER_GROUP)) - index2 = 2; - else if (ace->a_flags == NEW_ACE_EVERYONE) - index2 = 4; - else - return 1; - - access_masks[index1 + index2] |= ace->a_access_mask; - } - - /* The same bit shouldn't be both allowed and denied. */ - if (access_masks[0] & access_masks[1]) - return 1; - if (access_masks[2] & access_masks[3]) - return 1; - if (access_masks[4] & access_masks[5]) - return 1; - - /* Check minimum masks. */ - if ((NEW_ACE_WRITE_NAMED_ATTRS - | NEW_ACE_WRITE_ATTRIBUTES - | NEW_ACE_WRITE_ACL - | NEW_ACE_WRITE_OWNER) - & ~ access_masks[1]) - return 1; - access_masks[1] &= ~(NEW_ACE_WRITE_NAMED_ATTRS - | NEW_ACE_WRITE_ATTRIBUTES - | NEW_ACE_WRITE_ACL - | NEW_ACE_WRITE_OWNER); - if ((NEW_ACE_READ_NAMED_ATTRS - | NEW_ACE_READ_ATTRIBUTES - | NEW_ACE_READ_ACL - | NEW_ACE_SYNCHRONIZE) - & ~ access_masks[5]) - return 1; - access_masks[5] &= ~(NEW_ACE_READ_NAMED_ATTRS - | NEW_ACE_READ_ATTRIBUTES - | NEW_ACE_READ_ACL - | NEW_ACE_SYNCHRONIZE); - - /* Check the allowed or denied bits. */ - switch ((access_masks[0] | access_masks[1]) - & ~(NEW_ACE_READ_NAMED_ATTRS - | NEW_ACE_READ_ATTRIBUTES - | NEW_ACE_READ_ACL - | NEW_ACE_SYNCHRONIZE)) - { - case 0: - case NEW_ACE_READ_DATA: - case NEW_ACE_WRITEA_DATA: - case NEW_ACE_READ_DATA | NEW_ACE_WRITEA_DATA: - case NEW_ACE_EXECUTE: - case NEW_ACE_READ_DATA | NEW_ACE_EXECUTE: - case NEW_ACE_WRITEA_DATA | NEW_ACE_EXECUTE: - case NEW_ACE_READ_DATA | NEW_ACE_WRITEA_DATA | NEW_ACE_EXECUTE: - break; - default: - return 1; - } - switch ((access_masks[2] | access_masks[3]) - & ~(NEW_ACE_READ_NAMED_ATTRS - | NEW_ACE_READ_ATTRIBUTES - | NEW_ACE_READ_ACL - | NEW_ACE_SYNCHRONIZE)) - { - case 0: - case NEW_ACE_READ_DATA: - case NEW_ACE_WRITEA_DATA: - case NEW_ACE_READ_DATA | NEW_ACE_WRITEA_DATA: - case NEW_ACE_EXECUTE: - case NEW_ACE_READ_DATA | NEW_ACE_EXECUTE: - case NEW_ACE_WRITEA_DATA | NEW_ACE_EXECUTE: - case NEW_ACE_READ_DATA | NEW_ACE_WRITEA_DATA | NEW_ACE_EXECUTE: - break; - default: - return 1; - } - switch ((access_masks[4] | access_masks[5]) - & ~(NEW_ACE_WRITE_NAMED_ATTRS - | NEW_ACE_WRITE_ATTRIBUTES - | NEW_ACE_WRITE_ACL - | NEW_ACE_WRITE_OWNER)) - { - case 0: - case NEW_ACE_READ_DATA: - case NEW_ACE_WRITEA_DATA: - case NEW_ACE_READ_DATA | NEW_ACE_WRITEA_DATA: - case NEW_ACE_EXECUTE: - case NEW_ACE_READ_DATA | NEW_ACE_EXECUTE: - case NEW_ACE_WRITEA_DATA | NEW_ACE_EXECUTE: - case NEW_ACE_READ_DATA | NEW_ACE_WRITEA_DATA | NEW_ACE_EXECUTE: - break; - default: - return 1; } - /* Check that the NEW_ACE_WRITE_DATA and NEW_ACE_APPEND_DATA bits are - either both allowed or both denied. */ - if (((access_masks[0] & NEW_ACE_WRITE_DATA) != 0) - != ((access_masks[0] & NEW_ACE_APPEND_DATA) != 0)) - return 1; - if (((access_masks[2] & NEW_ACE_WRITE_DATA) != 0) - != ((access_masks[2] & NEW_ACE_APPEND_DATA) != 0)) - return 1; - if (((access_masks[4] & NEW_ACE_WRITE_DATA) != 0) - != ((access_masks[4] & NEW_ACE_APPEND_DATA) != 0)) - return 1; - } - - return 0; -} - -# endif - -#elif USE_ACL && HAVE_GETACL /* HP-UX */ - -/* Return 1 if the given ACL is non-trivial. - Return 0 if it is trivial, i.e. equivalent to a simple stat() mode. */ -int -acl_nontrivial (int count, struct acl_entry *entries, struct stat *sb) -{ - int i; - - for (i = 0; i < count; i++) - { - struct acl_entry *ace = &entries[i]; - - if (!((ace->uid == sb->st_uid && ace->gid == ACL_NSGROUP) - || (ace->uid == ACL_NSUSER && ace->gid == sb->st_gid) - || (ace->uid == ACL_NSUSER && ace->gid == ACL_NSGROUP))) - return 1; - } - return 0; -} - -# if HAVE_ACLV_H /* HP-UX >= 11.11 */ - -/* Return 1 if the given ACL is non-trivial. - Return 0 if it is trivial, i.e. equivalent to a simple stat() mode. */ -int -aclv_nontrivial (int count, struct acl *entries) -{ - int i; - - for (i = 0; i < count; i++) - { - struct acl *ace = &entries[i]; - - /* Note: If ace->a_type = USER_OBJ, ace->a_id is the st_uid from stat(). - If ace->a_type = GROUP_OBJ, ace->a_id is the st_gid from stat(). - We don't need to check ace->a_id in these cases. */ - if (!(ace->a_type == USER_OBJ /* no need to check ace->a_id here */ - || ace->a_type == GROUP_OBJ /* no need to check ace->a_id here */ - || ace->a_type == CLASS_OBJ - || ace->a_type == OTHER_OBJ)) - return 1; - } - return 0; -} - -# endif - -#elif USE_ACL && (HAVE_ACLX_GET || HAVE_STATACL) /* AIX */ - -/* Return 1 if the given ACL is non-trivial. - Return 0 if it is trivial, i.e. equivalent to a simple stat() mode. */ -int -acl_nontrivial (struct acl *a) -{ - /* The normal way to iterate through an ACL is like this: - struct acl_entry *ace; - for (ace = a->acl_ext; ace != acl_last (a); ace = acl_nxt (ace)) - { - struct ace_id *aei; - switch (ace->ace_type) - { - case ACC_PERMIT: - case ACC_DENY: - case ACC_SPECIFY: - ...; - } - for (aei = ace->ace_id; aei != id_last (ace); aei = id_nxt (aei)) - ... - } - */ - return (acl_last (a) != a->acl_ext ? 1 : 0); -} - -# if HAVE_ACLX_GET && defined ACL_AIX_WIP /* newer AIX */ - -/* Return 1 if the given ACL is non-trivial. - Return 0 if it is trivial, i.e. equivalent to a simple stat() mode. */ -int -acl_nfs4_nontrivial (nfs4_acl_int_t *a) -{ -# if 1 /* let's try this first */ - return (a->aclEntryN > 0 ? 1 : 0); -# else - int count = a->aclEntryN; - int i; - - for (i = 0; i < count; i++) - { - nfs4_ace_int_t *ace = &a->aclEntry[i]; - - if (!((ace->flags & ACE4_ID_SPECIAL) != 0 - && (ace->aceWho.special_whoid == ACE4_WHO_OWNER - || ace->aceWho.special_whoid == ACE4_WHO_GROUP - || ace->aceWho.special_whoid == ACE4_WHO_EVERYONE) - && ace->aceType == ACE4_ACCESS_ALLOWED_ACE_TYPE - && ace->aceFlags == 0 - && (ace->aceMask & ~(ACE4_READ_DATA | ACE4_LIST_DIRECTORY - | ACE4_WRITE_DATA | ACE4_ADD_FILE - | ACE4_EXECUTE)) == 0)) - return 1; - } - return 0; -# endif -} - -# endif - -#elif USE_ACL && HAVE_ACLSORT /* NonStop Kernel */ - -/* Test an ACL retrieved with ACL_GET. - Return 1 if the given ACL, consisting of COUNT entries, is non-trivial. - Return 0 if it is trivial, i.e. equivalent to a simple stat() mode. */ -int -acl_nontrivial (int count, struct acl *entries) -{ - int i; - - for (i = 0; i < count; i++) - { - struct acl *ace = &entries[i]; - - /* Note: If ace->a_type = USER_OBJ, ace->a_id is the st_uid from stat(). - If ace->a_type = GROUP_OBJ, ace->a_id is the st_gid from stat(). - We don't need to check ace->a_id in these cases. */ - if (!(ace->a_type == USER_OBJ /* no need to check ace->a_id here */ - || ace->a_type == GROUP_OBJ /* no need to check ace->a_id here */ - || ace->a_type == CLASS_OBJ - || ace->a_type == OTHER_OBJ)) - return 1; - } - return 0; -} - -#endif - - -/* Return 1 if NAME has a nontrivial access control list, 0 if NAME - only has no or a base access control list, and -1 (setting errno) - on error. SB must be set to the stat buffer of NAME, obtained - through stat() or lstat(). */ + if (ret < 0) + return - acl_errno_valid (errno); + return ret; -int -file_has_acl (char const *name, struct stat const *sb) -{ -#if USE_ACL - if (! S_ISLNK (sb->st_mode)) - { -# if HAVE_ACL_GET_FILE +# elif HAVE_ACL_GET_FILE /* POSIX 1003.1e (draft 17 -- abandoned) specific version. */ /* Linux, FreeBSD, Mac OS X, IRIX, Tru64 */ @@ -767,7 +349,7 @@ file_has_acl (char const *name, struct stat const *sb) if (stat (name, &statbuf) < 0) return -1; - return acl_nontrivial (count, entries, &statbuf); + return acl_nontrivial (count, entries); } } } @@ -875,7 +457,7 @@ file_has_acl (char const *name, struct stat const *sb) union { struct acl a; char room[4096]; } u; - if (statacl (name, STX_NORMAL, &u.a, sizeof (u)) < 0) + if (statacl ((char *) name, STX_NORMAL, &u.a, sizeof (u)) < 0) return -1; return acl_nontrivial (&u.a);