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