226 lines
5.9 KiB
C
226 lines
5.9 KiB
C
/*
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* UAE - The Un*x Amiga Emulator
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*
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* Library of functions to make emulated filesystem as independent as
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* possible of the host filesystem's capabilities.
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* This is the Win32 version.
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*
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* Copyright 1997 Mathias Ortmann
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* Copyright 1999 Bernd Schmidt
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*/
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#ifdef FILESYS
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#include "sysconfig.h"
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#include "sysdeps.h"
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#include "fsdb.h"
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#include <fat.h>
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#define TRACING_ENABLED 0
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#if TRACING_ENABLED
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#define TRACE(x) do { write_log x; } while(0)
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#else
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#define TRACE(x)
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#endif
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/* these are deadly (but I think allowed on the Amiga): */
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#define NUM_EVILCHARS 7
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static const char evilchars[NUM_EVILCHARS] = { '\\', '*', '?', '\"', '<', '>', '|' };
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/* Return nonzero for any name we can't create on the native filesystem. */
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int fsdb_name_invalid (const char *n)
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{
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int i;
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char a = n[0];
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char b = (a == '\0' ? a : n[1]);
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char c = (b == '\0' ? b : n[2]);
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char d = (c == '\0' ? c : n[3]);
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int l = strlen (n), ll;
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if (a >= 'a' && a <= 'z')
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a -= 32;
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if (b >= 'a' && b <= 'z')
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b -= 32;
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if (c >= 'a' && c <= 'z')
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c -= 32;
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/* reserved dos devices */
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ll = 0;
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if (a == 'A' && b == 'U' && c == 'X') ll = 3; /* AUX */
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if (a == 'C' && b == 'O' && c == 'N') ll = 3; /* CON */
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if (a == 'P' && b == 'R' && c == 'N') ll = 3; /* PRN */
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if (a == 'N' && b == 'U' && c == 'L') ll = 3; /* NUL */
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if (a == 'L' && b == 'P' && c == 'T' && (d >= '0' && d <= '9')) ll = 4; /* LPT# */
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if (a == 'C' && b == 'O' && c == 'M' && (d >= '0' && d <= '9')) ll = 4; /* COM# */
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/* AUX.anything, CON.anything etc.. are also illegal names */
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if (ll && (l == ll || (l > ll && n[ll] == '.')))
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return 1;
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/* spaces and periods at the end are a no-no */
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i = l - 1;
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if (n[i] == '.' || n[i] == ' ')
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return 1;
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/* these characters are *never* allowed */
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for (i = 0; i < NUM_EVILCHARS; i++) {
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if (strchr (n, evilchars[i]) != 0)
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return 1;
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}
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/* the reserved fsdb filename */
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if (strcmp (n, FSDB_FILE) == 0)
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return 1;
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return 0; /* the filename passed all checks, now it should be ok */
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}
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static uae_u32 filesys_parse_mask (uae_u32 mask)
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{
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return mask ^ 0xf;
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}
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int fsdb_exists (char *nname)
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{
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struct stat statbuf;
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return (stat (nname, &statbuf) != -1);
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}
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/* For an a_inode we have newly created based on a filename we found on the
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* native fs, fill in information about this file/directory. */
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int fsdb_fill_file_attrs (a_inode *base, a_inode *aino)
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{
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int mode;
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if ((mode = FAT_getAttr (aino->nname)) <0) {
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write_log ("FAT_getAttr('%s') failed! error=%d, aino=%p dir=%d\n", aino->nname,errno,aino,aino->dir);
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return 0;
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}
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aino->dir = (mode & ATTR_DIRECTORY) ? 1 : 0;
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aino->amigaos_mode = A_FIBF_EXECUTE | A_FIBF_READ;
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if (ATTR_ARCHIVE & mode)
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aino->amigaos_mode |= A_FIBF_ARCHIVE;
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if (! (ATTR_READONLY & mode))
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aino->amigaos_mode |= A_FIBF_WRITE | A_FIBF_DELETE;
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aino->amigaos_mode = filesys_parse_mask (aino->amigaos_mode);
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return 1;
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}
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int fsdb_set_file_attrs (a_inode *aino)
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{
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struct stat statbuf;
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int mode=0, tmpmask;
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tmpmask = filesys_parse_mask (aino->amigaos_mode);
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if (stat (aino->nname, &statbuf) == -1)
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return ERROR_OBJECT_NOT_AROUND;
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/* Unix dirs behave differently than AmigaOS ones. */
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/* windows dirs go where no dir has gone before... */
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if (! aino->dir) {
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if ((tmpmask & (A_FIBF_WRITE | A_FIBF_DELETE)) == 0)
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mode |= ATTR_READONLY;
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if (tmpmask & A_FIBF_ARCHIVE)
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mode |= ATTR_ARCHIVE;
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//else
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//mode &= ~ATTR_ARCHIVE;
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FAT_setAttr(aino->nname, mode);
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}
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aino->dirty = 1;
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return 0;
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}
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/* Return nonzero if we can represent the amigaos_mode of AINO within the
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* native FS. Return zero if that is not possible. */
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int fsdb_mode_representable_p (const a_inode *aino)
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{
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int mask = aino->amigaos_mode;
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int m1;
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if (aino->dir)
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return aino->amigaos_mode == 0;
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/* P or S set, or E or R clear, means we can't handle it. */
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if (mask & (A_FIBF_SCRIPT | A_FIBF_PURE | A_FIBF_EXECUTE | A_FIBF_READ))
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return 0;
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m1 = A_FIBF_DELETE | A_FIBF_WRITE;
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/* If it's rwed, we are OK... */
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if ((mask & m1) == 0) //Both delete and write protected
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return 1;
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/* We can also represent r-e-, by setting the host's readonly flag. */
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if ((mask & m1) == m1) //Neither delete nor write protected
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return 1;
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return 0;
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}
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char *fsdb_create_unique_nname (a_inode *base, const char *suggestion)
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{
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char *c;
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char tmp[256] = "__uae___";
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int i;
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strncat (tmp, suggestion, 240);
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/* replace the evil ones... */
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for (i=0; i < NUM_EVILCHARS; i++)
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while ((c = strchr (tmp, evilchars[i])) != 0)
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*c = '_';
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while ((c = strchr (tmp, '.')) != 0)
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*c = '_';
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while ((c = strchr (tmp, ' ')) != 0)
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*c = '_';
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for (;;) {
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char *p = build_nname (base->nname, tmp);
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struct stat st;
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if (stat(p, &st) < 0) {
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write_log ("unique name: %s\n", p);
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return p;
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}
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free (p);
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/* tmpnam isn't reentrant and I don't really want to hack configure
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* right now to see whether tmpnam_r is available... */
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for (i = 0; i < 8; i++) {
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tmp[i+8] = "_abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789"[rand () % 63];
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}
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}
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}
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int dos_errno (void)
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{
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int e = errno;
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switch (e) {
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case ENOMEM: return ERROR_NO_FREE_STORE;
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case EEXIST: return ERROR_OBJECT_EXISTS;
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case EACCES: return ERROR_WRITE_PROTECTED;
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case ENOENT: return ERROR_OBJECT_NOT_AROUND;
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case ENOTDIR: return ERROR_OBJECT_WRONG_TYPE;
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case ENOSPC: return ERROR_DISK_IS_FULL;
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case EBUSY: return ERROR_OBJECT_IN_USE;
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case EISDIR: return ERROR_OBJECT_WRONG_TYPE;
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#if defined(ETXTBSY)
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case ETXTBSY: return ERROR_OBJECT_IN_USE;
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#endif
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#if defined(EROFS)
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case EROFS: return ERROR_DISK_WRITE_PROTECTED;
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#endif
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#if defined(ENOTEMPTY)
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#if ENOTEMPTY != EEXIST
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case ENOTEMPTY: return ERROR_DIRECTORY_NOT_EMPTY;
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#endif
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#endif
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default:
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TRACE (("FSDB: Unimplemented error: %s\n", strerror (e)));
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return ERROR_NOT_IMPLEMENTED;
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}
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}
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#endif
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