111 lines
3.0 KiB
C
111 lines
3.0 KiB
C
/*
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* Copyright (c) 1989, 1990, 1991 by the University of Washington
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* Copyright (c) 1992 by the University of Southern California
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*
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* For copying and distribution information, please see the files
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* <uw-copyright.h> and <usc-copyr.h>.
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*/
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#include <uw-copyright.h>
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#include <stdio.h>
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#include <string.h>
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#include <sys/types.h>
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#include <sys/file.h>
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#include <sys/param.h>
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#include <errno.h>
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#include <pfs.h>
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#include <psite.h>
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#include <pcompat.h>
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#include <pmachine.h>
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#include <perrno.h>
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/*
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* see pcompat.h for the meanings of the flage
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*/
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int
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pfs_access(const char *path, char *npath, int npathlen, int flags)
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{
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char cpath[MAXPATHLEN];
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char *prefix;
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char *suffix;
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VLINK vl;
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int tmp;
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suffix = "";
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check_pfs_default();
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errno = 0;
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/* If disabled, do no mapping */
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if(pfs_enable == PMAP_DISABLE) {
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strcpy(npath,path);
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return(PSUCCESS);
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}
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if(pfs_enable == PMAP_COLON) {
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if(*path == ':') path++;
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else if(index(path,':'));
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else {strcpy(npath,path); return(PSUCCESS);}
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}
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if((pfs_enable == PMAP_ATSIGN_NF) || (pfs_enable == PMAP_ATSIGN)) {
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if(*path == '@') {
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path++;
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strcpy(npath,path);
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return(PSUCCESS);
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}
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}
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p__compat_initialize();
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/* I should probably choose better values for errno */
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vl = rd_vlink(path);
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if((perrno || !vl) && ((flags == PFA_CRMAP)||(flags == PFA_CREATE))) {
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strcpy(cpath,path);
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prefix = cpath;
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suffix = strrchr(cpath,'/');
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if(suffix) {
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if(suffix == prefix) prefix = "/";
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*(suffix++) = '\0';
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vl = rd_vlink(prefix);
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if(vl) {
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sprintf(cpath,"%s/%s",vl->hsoname,suffix);
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vl->hsoname = stcopyr(cpath,vl->hsoname);
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}
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}
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}
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/* If not found, but PMAP_ATSIGN_NF, then check if a real file */
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if(((perrno == PFS_DIR_NOT_FOUND) || (perrno == RVD_DIR_NOT_THERE) ||
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(!perrno && !vl)) &&
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(pfs_enable == PMAP_ATSIGN_NF) &&
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(*path == '/') && ((strncmp(path,"/tmp",4) == 0) ||
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((flags != PFA_CRMAP) && (flags != PFA_CREATE)))) {
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strcpy(npath,path);
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return(PSUCCESS);
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}
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if(perrno) {errno = ENOENT;return(perrno);}
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if(!vl) {errno = ENOENT;return(PFS_FILE_NOT_FOUND);}
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#ifdef PCOMPAT_SUPPORT_FTP
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/* P_AM_FTP requires prompting for a password, which is not something
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transparent to the user. That's why without the special
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PCOMPAT_SUPPORT_FTP definition, mapname isn't called with the
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MAP_PROMPT_OK option. */
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tmp = mapname(vl,npath, npathlen,
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MAP_PROMPT_OK | ((flags & PFA_RO) ?
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MAP_READONLY : MAP_READWRITE));
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#else
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tmp = mapname(vl,npath, npathlen, ((flags & PFA_RO) ?
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MAP_READONLY : MAP_READWRITE));
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#endif
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vllfree(vl);
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if(tmp && (tmp != PMC_DELETE_ON_CLOSE)) errno = ENOENT;
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return(tmp);
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}
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