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331 lines
7.9 KiB
331 lines
7.9 KiB
/*
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* Copyright (c) 2000 Silicon Graphics, Inc. All Rights Reserved.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of version 2 of the GNU General Public License as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it would be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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*
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* Further, this software is distributed without any warranty that it is
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* free of the rightful claim of any third person regarding infringement
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* or the like. Any license provided herein, whether implied or
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* otherwise, applies only to this software file. Patent licenses, if
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* any, provided herein do not apply to combinations of this program with
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* other software, or any other product whatsoever.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
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* Mountain View, CA 94043, or:
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*
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* http://www.sgi.com
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*
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* For further information regarding this notice, see:
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*
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* http://oss.sgi.com/projects/GenInfo/NoticeExplan/
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*/
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/**************************************************************
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*
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* OS Testing - Silicon Graphics, Inc.
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*
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* FUNCTION NAME : parse_open_flags
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* openflags2symbols
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*
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* FUNCTION TITLE : converts open flag symbols into bitmask
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* converts open flag bitmask into symbols
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*
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* SYNOPSIS:
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* int parse_open_flags(symbols, badname)
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* char *symbols;
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* char **badname;
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*
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* char *openflags2symbols(openflags, sep, mode)
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* int openflags;
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* char *sep;
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* int mode;
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*
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* AUTHOR : Richard Logan
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*
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* CO-PILOT(s) : Dean Roehrich
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*
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* INITIAL RELEASE : UNICOS 8.0
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*
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* DESIGN DESCRIPTION
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* The parse_open_flags function can be used to convert
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* a list of comma separated open(2) flag symbols (i.e. O_TRUNC)
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* into the bitmask that can be used by open(2).
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* If a symbol is unknown and <badname> is not NULL, <badname>
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* will updated to point that symbol in <string>.
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* Parse_open_flags will return -1 on this error.
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* Otherwise parse_open_flags will return the open flag bitmask.
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* If parse_open_flags returns, <string> will left unchanged.
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*
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* The openflags2symbols function attempts to convert open flag
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* bits into human readable symbols (i.e. O_TRUNC). If there
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* are more than one symbol, the <sep> string will be placed as
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* a separator between symbols. Commonly used separators would
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* be a comma "," or pipe "|". If <mode> is one and not all
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* <openflags> bits can be converted to symbols, the "UNKNOWN"
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* symbol will be added to return string.
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* Openflags2symbols will return the indentified symbols.
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* If no symbols are recognized the return value will be a empty
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* string or the "UNKNOWN" symbol.
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*
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* SPECIAL REQUIREMENTS
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* None.
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*
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* UPDATE HISTORY
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* This should contain the description, author, and date of any
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* "interesting" modifications (i.e. info should helpful in
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* maintaining/enhancing this module).
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* username description
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* ----------------------------------------------------------------
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* rrl This code was first created during the beginning
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* of the SFS testing days. I think that was in 1993.
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* This code was updated in 05/96.
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* (05/96) openflags2symbols was written.
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*
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* BUGS/LIMITATIONS
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* Currently (05/96) all known symbols are coded into openflags2symbols.
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* If new open flags are added this code will have to updated
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* to know about them or they will not be recognized.
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*
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**************************************************************/
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#include <stdio.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include <sys/param.h>
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#include <string.h> /* strcat */
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#include "open_flags.h"
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#define UNKNOWN_SYMBOL "UNKNOWN"
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static char Open_symbols[512]; /* space for openflags2symbols return value */
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struct open_flag_t {
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char *symbol;
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int flag;
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};
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static struct open_flag_t Open_flags[] = {
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{"O_RDONLY", O_RDONLY},
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{"O_WRONLY", O_WRONLY},
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{"O_RDWR", O_RDWR},
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{"O_SYNC", O_SYNC},
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{"O_CREAT", O_CREAT},
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{"O_TRUNC", O_TRUNC},
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{"O_EXCL", O_EXCL},
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{"O_APPEND", O_APPEND},
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{"O_NONBLOCK", O_NONBLOCK},
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#if O_NOCTTY
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{"O_NOCTTY", O_NOCTTY},
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#endif
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#if O_DSYNC
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{"O_DSYNC", O_DSYNC},
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#endif
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#if O_RSYNC
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{"O_RSYNC", O_RSYNC},
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#endif
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#if O_ASYNC
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{"O_ASYNC", O_ASYNC},
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#endif
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#if O_PTYIGN
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{"O_PTYIGN", O_PTYIGN},
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#endif
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#if O_NDELAY
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{"O_NDELAY", O_NDELAY},
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#endif
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#if O_RAW
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{"O_RAW", O_RAW},
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#endif
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#ifdef O_SSD
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{"O_SSD", O_SSD},
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#endif
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#if O_BIG
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{"O_BIG", O_BIG},
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#endif
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#if O_PLACE
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{"O_PLACE", O_PLACE},
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#endif
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#if O_RESTART
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{"O_RESTART", O_RESTART},
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#endif
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#if O_SFSXOP
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{"O_SFSXOP", O_SFSXOP},
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#endif
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#if O_SFS_DEFER_TM
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{"O_SFS_DEFER_TM", O_SFS_DEFER_TM},
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#endif
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#if O_WELLFORMED
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{"O_WELLFORMED", O_WELLFORMED},
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#endif
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#if O_LDRAW
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{"O_LDRAW", O_LDRAW},
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#endif
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#if O_T3D
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{"O_T3D", O_T3D},
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#endif /* O_T3D */
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#if O_PARALLEL
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{"O_PARALLEL", O_PARALLEL},
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{"O_FSA", O_PARALLEL | O_WELLFORMED | O_RAW}, /* short cut */
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#endif /* O_PARALLEL */
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#ifdef O_LARGEFILE
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{"O_LARGEFILE", O_LARGEFILE},
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#endif
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#ifdef O_DIRECT
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{"O_DIRECT", O_DIRECT},
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#endif
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#ifdef O_PRIV
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{"O_PRIV", O_PRIV},
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#endif
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};
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int parse_open_flags(char *string, char **badname)
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{
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int bits = 0;
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char *name;
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char *cc;
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char savecc;
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int found;
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unsigned int ind;
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name = string;
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cc = name;
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while (1) {
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for (; ((*cc != ',') && (*cc != '\0')); cc++) ;
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savecc = *cc;
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*cc = '\0';
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found = 0;
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for (ind = 0;
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ind < sizeof(Open_flags) / sizeof(struct open_flag_t);
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ind++) {
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if (strcmp(name, Open_flags[ind].symbol) == 0) {
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bits |= Open_flags[ind].flag;
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found = 1;
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break;
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}
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}
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*cc = savecc; /* restore string */
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if (found == 0) { /* invalid name */
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if (badname != NULL)
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*badname = name;
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return -1;
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}
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if (savecc == '\0')
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break;
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name = ++cc;
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} /* end while */
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return bits;
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} /* end of parse_open_flags */
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char *openflags2symbols(int openflags, char *sep, int mode)
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{
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int ind;
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int size;
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int bits = openflags;
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int havesome = 0;
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Open_symbols[0] = '\0';
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size = sizeof(Open_flags) / sizeof(struct open_flag_t);
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/*
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* Deal with special case of O_RDONLY. If O_WRONLY nor O_RDWR
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* bits are not set, assume O_RDONLY.
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*/
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if ((bits & (O_WRONLY | O_RDWR)) == 0) {
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strcat(Open_symbols, "O_RDONLY");
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havesome = 1;
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}
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/*
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* Loop through all but O_RDONLY elments of Open_flags
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*/
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for (ind = 1; ind < size; ind++) {
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if ((bits & Open_flags[ind].flag) == Open_flags[ind].flag) {
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if (havesome)
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strcat(Open_symbols, sep);
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strcat(Open_symbols, Open_flags[ind].symbol);
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havesome++;
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/* remove flag bits from bits */
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bits = bits & (~Open_flags[ind].flag);
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}
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}
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/*
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* If not all bits were identified and mode was equal to 1,
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* added UNKNOWN_SYMBOL to return string
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*/
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if (bits && mode == 1) { /* not all bits were identified */
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if (havesome)
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strcat(Open_symbols, sep);
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strcat(Open_symbols, UNKNOWN_SYMBOL);
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}
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return Open_symbols;
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} /* end of openflags2symbols */
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#ifdef UNIT_TEST
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/*
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* The following code provides a UNIT test main for
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* parse_open_flags and openflags2symbols functions.
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*/
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int main(argc, argv)
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int argc;
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char **argv;
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{
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int bits;
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int ret;
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char *err;
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if (argc == 1) {
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printf("Usage: %s openflagsbits\n\t%s symbols\n", argv[0],
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argv[0]);
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exit(1);
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}
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if (sscanf(argv[1], "%i", &bits) == 1) {
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printf("openflags2symbols(%#o, \",\", 1) returned %s\n",
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bits, openflags2symbols(bits, ",", 1));
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} else {
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ret = parse_open_flags(argv[1], &err);
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if (ret == -1)
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printf
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("parse_open_flags(%s, &err) returned -1, err = %s\n",
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argv[0], err);
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else
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printf("parse_open_flags(%s, &err) returned %#o\n",
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argv[0], ret);
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}
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exit(0);
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}
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#endif /* end of UNIT_TEST */
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