159 lines
7.3 KiB
C
159 lines
7.3 KiB
C
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/*
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* Copyright (c) 1991, 1992, 1994 by the University of Southern California
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*
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* For copying and distribution information, please see the file
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* <usc-license.h>.
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*/
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#include <usc-license.h>
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#include <pfs_threads.h>
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/*
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* pcompat.h - Definitions for compatability library
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*
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* This file contains the defintions used by the compatability
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* library. Among the definitions are the possible values for
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* the pfs_enable variable. This file also contains the external
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* declaration of that variable. The module pfs_enable.o is included in
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* libpfs.a because some of the routines in that library set it.
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* It can also be explicitly declared in a program that uses the compatability
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* library, if you wish.
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*
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* The only place it is checked, however, is in pfs_access,
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* found in libpcompat.a
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*/
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#if 0 /* this code is commented out because
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pfs_default is no longer an external
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interface. --swa, April 13, 1994*/
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extern int pfs_default; /* initialized to PMAP_UNINITIALIZED in
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libpcompat. Set to some other value in
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p__get_pfs_default(), which might include
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PMAP_UNSET. Keeping this as a global
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variable isn't really necessary. It does
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let the users know what the starting value
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of PFS_DEFAULT was, but I'm not sure that's
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strictly necessary.
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This variable is currently used entirely
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internally to the PCOMPAT library, and could
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be renamed easily, since no users are using
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it as an interface. */
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#endif
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extern int pfs_enable; /* pfs_enable is declared in the PFS library,
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since routines in that library modify it.
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In that library, it defaults to PMAP_UNSET.
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This can be declared explicitly in a file
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linked with the program using this library
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if the programmer wants to override the
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value. */
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extern int pfs_quiet; /* see lib/pcompat/pfs_quiet.c. This can be
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declared explicitly in a file linked with
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the program using this library if the
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programmer wants to override the
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value. Non-zero value means system calls
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don't print any information. */
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/* Definitions for values of pfs_enable */
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#if 0 /* this will probably never be needed, and can
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be deleted after Beta.5.3 goes out.
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--swa, April 13, 1994*/
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#define PMAP_UNINITIALIZED (-1) /* Used only for pfs_default. Indicates that
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its starting value hasn't been read from the
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environment yet. If the environment has
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already been searched for PFS_DEFAULT, then
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this will be reset to PMAP_UNSET. */
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#endif
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#define PMAP_DISABLE 0 /* always resolve names in UNIX */
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#define PMAP_ENABLE 1 /* always reslve names in VS */
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#define PMAP_COLON 2 /* Resolve names in UNIX by default. Names
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preceded with a colon are resolved in the
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VS. */
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#define PMAP_ATSIGN_NF 3 /* Resolve names in VS by default. Names
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preceded with an @ sign and names not found
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in the VS are resolved in the UNIX
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filesystem. */
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#define PMAP_ATSIGN 4 /* Resolve names in the VS by default. Names
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preceded with an @ sign are resolved in the
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UNIX filesystem. */
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#define PMAP_UNSET 5 /* pfs_enable is initialized to this value by
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the pcompat library, unless the user program
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declares its own version of pfs_enable and
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initializes it to something else. If
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pfs_enable is set to PMAP_UNSET, then
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p__initialize_pfs_enable() will be called by
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the PCOMPAT library routines in order to
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initialize pfs_enable to the current pfs
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default.
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This allows a user program to initialize
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pfs_enable and not have it overridden by
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pfs_default. */
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/* Definitions for PFS_ACCESS */
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#define PFA_MAP 0 /* Map the file name only */
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#define PFA_CREATE 1 /* Create file if not found */
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#define PFA_CRMAP 2 /* Map file name. Map to new name if not found */
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#define PFA_RO 4 /* Access to file is read only */
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#define DISABLE_PFS(stmt) do {int DpfStmp; DpfStmp = pfs_enable;\
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pfs_enable = PMAP_DISABLE; \
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stmt; \
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pfs_enable = DpfStmp;} while (0)
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#define DISABLE_PFS_START() DpfStmp = pfs_enable; pfs_enable = PMAP_DISABLE;
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#define DISABLE_PFS_END() pfs_enable = DpfStmp;
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#if 0 /* This interface is dead as of 4/13/94 --swa
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*/
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void p__get_pfs_default(); /* only used here :) */
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#define check_pfs_default() \
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do { if(pfs_default == -1) p__get_pfs_default(); } while (0)
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#endif
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/* New interface as of 4/13/94 --swa */
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/* This is called by the p__compat_initialize() routine, iff pfs_enable is set
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to PMAP_UNSET. It looks for the PFS_DEFAULT environment variable and
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attempts to set pfs_enable accordingly.
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*/
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void p__set_pfs_enable_from_default(void);
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extern int pfs_access(const char path[], char npath[], int npathlen, int
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flags);
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/* Subfunctions used internally by the PCOMPAT library. */
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extern int p__getvdirentries(int fd, char *buf, int nbytes, int *basep);
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extern int p__readvdirentries(char *dirname);
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extern int p__delvdirentries(int desc);
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extern int p__seekvdir(int desc, int pos);
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extern int p__getvdbsize(int desc, int pos);
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#ifndef DIR
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#include <pmachine.h> /* for USE_SYS_DIR_H test. */
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/* Needed if not already included. */
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#ifdef USE_SYS_DIR_H
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#include <sys/dir.h>
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#else /* USE_SYS_DIR_H */
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#include <dirent.h>
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#endif /* USE_SYS_DIR_H */
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#endif /* DIR */
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/* Called by seekdir(). */
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extern void p__seekdir(register DIR *dirp, long loc);
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/* This is called internally by all pcompat library functions that call
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PFS library functions. It makes sure that the PFS library and any libraries
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that PFS uses are properly initialized before usage. */
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extern void p__compat_initialize(void);
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