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author | Lorry Tar Creator <lorry-tar-importer@baserock.org> | 2014-12-02 09:01:21 +0000 |
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committer | <> | 2014-12-04 16:11:25 +0000 |
commit | bdab5265fcbf3f472545073a23f8999749a9f2b9 (patch) | |
tree | c6018dd03dea906f8f1fb5f105f05b71a7dc250a /lib/isc/fsaccess.c | |
download | ntp-bdab5265fcbf3f472545073a23f8999749a9f2b9.tar.gz |
Imported from /home/lorry/working-area/delta_ntp/ntp-dev-4.2.7p482.tar.gz.ntp-dev-4.2.7p482
Diffstat (limited to 'lib/isc/fsaccess.c')
-rw-r--r-- | lib/isc/fsaccess.c | 102 |
1 files changed, 102 insertions, 0 deletions
diff --git a/lib/isc/fsaccess.c b/lib/isc/fsaccess.c new file mode 100644 index 0000000..5c97183 --- /dev/null +++ b/lib/isc/fsaccess.c @@ -0,0 +1,102 @@ +/* + * Copyright (C) 2004, 2005, 2007 Internet Systems Consortium, Inc. ("ISC") + * Copyright (C) 2000, 2001 Internet Software Consortium. + * + * Permission to use, copy, modify, and/or distribute this software for any + * purpose with or without fee is hereby granted, provided that the above + * copyright notice and this permission notice appear in all copies. + * + * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH + * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY + * AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT, + * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM + * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE + * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR + * PERFORMANCE OF THIS SOFTWARE. + */ + +/* $Id: fsaccess.c,v 1.10 2007/06/19 23:47:17 tbox Exp $ */ + +/*! \file + * \brief + * This file contains the OS-independent functionality of the API. + */ +#include <isc/fsaccess.h> +#include <isc/result.h> +#include <isc/util.h> + +/*! + * Shorthand. Maybe ISC__FSACCESS_PERMISSIONBITS should not even be in + * <isc/fsaccess.h>. Could check consistency with sizeof(isc_fsaccess_t) + * and the number of bits in each function. + */ +#define STEP (ISC__FSACCESS_PERMISSIONBITS) +#define GROUP (STEP) +#define OTHER (STEP * 2) + +void +isc_fsaccess_add(int trustee, int permission, isc_fsaccess_t *access) { + REQUIRE(trustee <= 0x7); + REQUIRE(permission <= 0xFF); + + if ((trustee & ISC_FSACCESS_OWNER) != 0) + *access |= permission; + + if ((trustee & ISC_FSACCESS_GROUP) != 0) + *access |= (permission << GROUP); + + if ((trustee & ISC_FSACCESS_OTHER) != 0) + *access |= (permission << OTHER); +} + +void +isc_fsaccess_remove(int trustee, int permission, isc_fsaccess_t *access) { + REQUIRE(trustee <= 0x7); + REQUIRE(permission <= 0xFF); + + + if ((trustee & ISC_FSACCESS_OWNER) != 0) + *access &= ~permission; + + if ((trustee & ISC_FSACCESS_GROUP) != 0) + *access &= ~(permission << GROUP); + + if ((trustee & ISC_FSACCESS_OTHER) != 0) + *access &= ~(permission << OTHER); +} + +static isc_result_t +check_bad_bits(isc_fsaccess_t access, isc_boolean_t is_dir) { + isc_fsaccess_t bits; + + /* + * Check for disallowed user bits. + */ + if (is_dir) + bits = ISC_FSACCESS_READ | + ISC_FSACCESS_WRITE | + ISC_FSACCESS_EXECUTE; + else + bits = ISC_FSACCESS_CREATECHILD | + ISC_FSACCESS_ACCESSCHILD | + ISC_FSACCESS_DELETECHILD | + ISC_FSACCESS_LISTDIRECTORY; + + /* + * Set group bad bits. + */ + bits |= bits << STEP; + /* + * Set other bad bits. + */ + bits |= bits << STEP; + + if ((access & bits) != 0) { + if (is_dir) + return (ISC_R_NOTFILE); + else + return (ISC_R_NOTDIRECTORY); + } + + return (ISC_R_SUCCESS); +} |