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/* $OpenBSD: strtofflags.c,v 1.7 2015/08/20 21:49:29 deraadt Exp $ */ |
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/*- |
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* Copyright (c) 1993 |
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* The Regents of the University of California. All rights reserved. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions |
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* are met: |
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* 1. Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* 2. Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in the |
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* documentation and/or other materials provided with the distribution. |
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* 3. Neither the name of the University nor the names of its contributors |
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* may be used to endorse or promote products derived from this software |
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* without specific prior written permission. |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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* SUCH DAMAGE. |
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*/ |
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#include <sys/types.h> |
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#include <sys/stat.h> |
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#include <stddef.h> |
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#include <stdlib.h> |
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#include <unistd.h> |
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#include <string.h> |
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static const struct { |
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char *name; |
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u_int32_t flag; |
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int invert; |
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} mapping[] = { |
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/* shorter names per flag first, all prefixed by "no" */ |
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{ "nosappnd", SF_APPEND, 0 }, |
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{ "nosappend", SF_APPEND, 0 }, |
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{ "noarch", SF_ARCHIVED, 0 }, |
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{ "noarchived", SF_ARCHIVED, 0 }, |
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{ "noschg", SF_IMMUTABLE, 0 }, |
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{ "noschange", SF_IMMUTABLE, 0 }, |
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{ "nosimmutable", SF_IMMUTABLE, 0 }, |
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#ifdef __FreeBSD__ |
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{ "nosunlnk", SF_NOUNLINK, 0 }, |
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{ "nosunlink", SF_NOUNLINK, 0 }, |
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#endif |
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{ "nouappnd", UF_APPEND, 0 }, |
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{ "nouappend", UF_APPEND, 0 }, |
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{ "nouchg", UF_IMMUTABLE, 0 }, |
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{ "nouchange", UF_IMMUTABLE, 0 }, |
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{ "nouimmutable", UF_IMMUTABLE, 0 }, |
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{ "nodump", UF_NODUMP, 1 }, |
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{ "noopaque", UF_OPAQUE, 0 }, |
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#ifdef __FreeBSD__ |
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{ "nouunlnk", UF_NOUNLINK, 0 }, |
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{ "nouunlink", UF_NOUNLINK, 0 } |
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#endif |
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}; |
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#define longestflaglen 12 |
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#define nmappings (sizeof(mapping) / sizeof(mapping[0])) |
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/* |
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* fflagstostr -- |
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* Convert file flags to a comma-separated string. If no flags |
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* are set, return the empty string. |
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*/ |
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char * |
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fflagstostr(u_int32_t flags) |
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{ |
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char *string; |
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char *sp, *dp; |
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u_int32_t setflags; |
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int i; |
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if ((string = calloc(nmappings, longestflaglen + 1)) == NULL) |
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return (NULL); |
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setflags = flags; |
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dp = string; |
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for (i = 0; i < nmappings; i++) { |
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if (setflags & mapping[i].flag) { |
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if (dp > string) |
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*dp++ = ','; |
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for (sp = mapping[i].invert ? mapping[i].name : |
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mapping[i].name + 2; *sp; *dp++ = *sp++) ; |
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setflags &= ~mapping[i].flag; |
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} |
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} |
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*dp = '\0'; |
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return (string); |
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} |
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/* |
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* strtofflags -- |
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* Take string of arguments and return file flags. Return 0 on |
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* success, 1 on failure. On failure, stringp is set to point |
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* to the offending token. |
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*/ |
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int |
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strtofflags(char **stringp, u_int32_t *setp, u_int32_t *clrp) |
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{ |
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char *string, *p; |
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int i; |
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if (setp) |
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*setp = 0; |
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if (clrp) |
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*clrp = 0; |
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string = *stringp; |
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while ((p = strsep(&string, "\t ,")) != NULL) { |
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*stringp = p; |
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if (*p == '\0') |
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continue; |
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for (i = 0; i < nmappings; i++) { |
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if (strcmp(p, mapping[i].name + 2) == 0) { |
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if (mapping[i].invert) { |
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if (clrp) |
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*clrp |= mapping[i].flag; |
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} else { |
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if (setp) |
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*setp |= mapping[i].flag; |
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} |
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break; |
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} else if (strcmp(p, mapping[i].name) == 0) { |
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if (mapping[i].invert) { |
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if (setp) |
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*setp |= mapping[i].flag; |
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} else { |
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if (clrp) |
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*clrp |= mapping[i].flag; |
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} |
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break; |
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} |
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} |
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if (i == nmappings) |
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return 1; |
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} |
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return 0; |
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} |