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198 lines
3.6 KiB
C
198 lines
3.6 KiB
C
/*-
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* See the file LICENSE for redistribution information.
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*
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* Copyright (c) 1997-2005
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* Sleepycat Software. All rights reserved.
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*
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* $Id: os_oflags.c,v 12.2 2005/06/16 20:23:26 bostic Exp $
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*/
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#include "db_config.h"
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#ifndef NO_SYSTEM_INCLUDES
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#include <sys/types.h>
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#include <sys/stat.h>
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#ifdef HAVE_SHMGET
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#include <sys/ipc.h>
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#include <sys/shm.h>
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#endif
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#include <fcntl.h>
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#endif
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#include "db_int.h"
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/*
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* __db_oflags --
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* Convert open(2) flags to DB flags.
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*
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* PUBLIC: u_int32_t __db_oflags __P((int));
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*/
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u_int32_t
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__db_oflags(oflags)
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int oflags;
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{
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u_int32_t dbflags;
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dbflags = 0;
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if (oflags & O_CREAT)
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dbflags |= DB_CREATE;
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if (oflags & O_TRUNC)
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dbflags |= DB_TRUNCATE;
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/*
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* !!!
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* Convert POSIX 1003.1 open(2) mode flags to DB flags. This isn't
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* an exact science as few POSIX implementations have a flag value
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* for O_RDONLY, it's simply the lack of a write flag.
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*/
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#ifndef O_ACCMODE
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#define O_ACCMODE (O_RDONLY | O_RDWR | O_WRONLY)
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#endif
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switch (oflags & O_ACCMODE) {
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case O_RDWR:
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case O_WRONLY:
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break;
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default:
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dbflags |= DB_RDONLY;
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break;
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}
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return (dbflags);
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}
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#ifdef DB_WIN32
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#ifndef S_IRUSR
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#define S_IRUSR S_IREAD /* R for owner */
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#endif
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#ifndef S_IWUSR
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#define S_IWUSR S_IWRITE /* W for owner */
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#endif
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#ifndef S_IXUSR
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#define S_IXUSR 0 /* X for owner */
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#endif
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#ifndef S_IRGRP
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#define S_IRGRP 0 /* R for group */
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#endif
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#ifndef S_IWGRP
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#define S_IWGRP 0 /* W for group */
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#endif
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#ifndef S_IXGRP
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#define S_IXGRP 0 /* X for group */
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#endif
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#ifndef S_IROTH
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#define S_IROTH 0 /* R for other */
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#endif
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#ifndef S_IWOTH
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#define S_IWOTH 0 /* W for other */
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#endif
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#ifndef S_IXOTH
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#define S_IXOTH 0 /* X for other */
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#endif
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#else
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#ifndef S_IRUSR
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#define S_IRUSR 0000400 /* R for owner */
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#endif
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#ifndef S_IWUSR
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#define S_IWUSR 0000200 /* W for owner */
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#endif
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#ifndef S_IXUSR
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#define S_IXUSR 0000100 /* X for owner */
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#endif
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#ifndef S_IRGRP
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#define S_IRGRP 0000040 /* R for group */
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#endif
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#ifndef S_IWGRP
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#define S_IWGRP 0000020 /* W for group */
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#endif
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#ifndef S_IXGRP
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#define S_IXGRP 0000010 /* X for group */
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#endif
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#ifndef S_IROTH
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#define S_IROTH 0000004 /* R for other */
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#endif
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#ifndef S_IWOTH
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#define S_IWOTH 0000002 /* W for other */
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#endif
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#ifndef S_IXOTH
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#define S_IXOTH 0000001 /* X for other */
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#endif
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#endif /* DB_WIN32 */
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/*
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* __db_omode --
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* Convert a permission string to the correct open(2) flags.
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*
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* PUBLIC: int __db_omode __P((const char *));
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*/
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int
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__db_omode(perm)
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const char *perm;
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{
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int mode;
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mode = 0;
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if (perm[0] == 'r')
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mode |= S_IRUSR;
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if (perm[1] == 'w')
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mode |= S_IWUSR;
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if (perm[2] == 'x')
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mode |= S_IXUSR;
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if (perm[3] == 'r')
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mode |= S_IRGRP;
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if (perm[4] == 'w')
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mode |= S_IWGRP;
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if (perm[5] == 'x')
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mode |= S_IXGRP;
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if (perm[6] == 'r')
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mode |= S_IROTH;
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if (perm[7] == 'w')
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mode |= S_IWOTH;
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if (perm[8] == 'x')
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mode |= S_IXOTH;
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return (mode);
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}
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#ifdef HAVE_SHMGET
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#ifndef SHM_R
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#define SHM_R 0400
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#endif
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#ifndef SHM_W
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#define SHM_W 0200
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#endif
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/*
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* __db_shm_mode --
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* Map the DbEnv::open method file mode permissions to shmget call
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* permissions.
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*
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* PUBLIC: int __db_shm_mode __P((DB_ENV *));
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*/
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int
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__db_shm_mode(dbenv)
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DB_ENV *dbenv;
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{
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int mode;
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/* Default to r/w owner, r/w group. */
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if (dbenv->db_mode == 0)
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return (SHM_R | SHM_W | SHM_R >> 3 | SHM_W >> 3);
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mode = 0;
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if (dbenv->db_mode & S_IRUSR)
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mode |= SHM_R;
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if (dbenv->db_mode & S_IWUSR)
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mode |= SHM_W;
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if (dbenv->db_mode & S_IRGRP)
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mode |= SHM_R >> 3;
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if (dbenv->db_mode & S_IWGRP)
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mode |= SHM_W >> 3;
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if (dbenv->db_mode & S_IROTH)
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mode |= SHM_R >> 6;
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if (dbenv->db_mode & S_IWOTH)
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mode |= SHM_W >> 6;
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return (mode);
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}
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#endif
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