long xchmod(char *p, int wrt, char mod)
{
OFD *fd;
DND *dn; /* M01.01.03 */
const char *s;
long pos;
if ((long)(dn = findit(p,&s,0)) < 0) /* M01.01.1212.01 */
return( (long)dn );
if (!(long)dn) /* M01.01.1214.01 */
return( EPTHNF );
pos = 0;
if( ! scan( dn , s , FA_NORM , &pos ) ) /* M01.01.03 */
return( EFILNF ) ;
pos -= 21; /* point at attribute in file */
fd = dn->d_ofd;
ixlseek(fd,pos);
if (!wrt)
ixread(fd,1L,&mod);
else
{
ixwrite(fd,1L,&mod);
ixclose(fd,CL_DIR); /* for flush */
}
return(mod);
}
/*
** ixdel - internal delete file.
**
** Traverse the list of files open for this directory node.
** If a file is found that has the same position in the directory as the one
** we are to delete, then scan the system file table to see if this process is
** then owner. If so, then close it, otherwise abort.
**
** NOTE: both 'for' loops scan for the entire length of their
** respective data structures, and do not drop out of the loop on
** the first occurrence of a match.
** Used by
** ixcreat()
** xunlink()
** xrmdir()
**
*/
long ixdel(DND *dn, FCB *f, long pos)
{
OFD *fd;
DMD *dm;
int n2;
int n;
char c;
for (fd = dn->d_files; fd; fd = fd->o_link)
if (fd->o_dirbyt == pos)
for (n = 0; n < OPNFILES; n++)
if (sft[n].f_ofd == fd)
{
if (sft[n].f_own == run)
ixclose(fd,0);
else
return EACCDN;
}
/*
* Traverse this file's chain of allocated clusters, freeing them.
*/
dm = dn->d_drv;
n = f->f_clust;
swpw(n);
while (n && !endofchain(n))
{
n2 = getrealcl(n,dm);
clfix(n,FREECLUSTER,dm);
n = n2;
}
/*
* Mark the directory entry as erased.
*/
fd = dn->d_ofd;
ixlseek(fd,pos);
c = (char)ERASE_MARKER;
ixwrite(fd,1L,&c);
ixclose(fd,CL_DIR);
/*
* NOTE that the preceding routines that do physical disk operations
* will 'longjmp' on failure at the BIOS level, thereby allowing us to
* simply return with E_OK.
*/
return E_OK;
}
/* name: path name of file
* attr: atttributes
*/
long ixcreat(char *name, char attr)
{
DND *dn;
OFD *fd;
FCB *f;
const char *s;
char n[2], a[11]; /* M01.01.03 */
int i, f2; /* M01.01.03 */
long pos, rc;
n[0] = (char)ERASE_MARKER; n[1] = 0;
/* first find path */
if ((long)(dn = findit(name,&s,0)) < 0) /* M01.01.1212.01 */
return (long)dn;
if (!dn) /* M01.01.1214.01 */
return EPTHNF;
if (!*s || (*s == '.')) /* no file name || '.' || '..' */
return EPTHNF;
/* M01.01.0721.01 */
if (contains_illegal_characters(s))
return EACCDN;
/*
* if the volume label attribute is set, no others are allowed
*/
if ((attr&FA_VOL) && (attr != FA_VOL))
return EACCDN;
/*
* volume labels may only be created in the root
*/
if ((attr == FA_VOL) && dn->d_parent)
return EACCDN;
if (!(fd = dn->d_ofd))
fd = makofd(dn); /* makofd() also updates dn->d_ofd */
/*
* if a matching file already exists, we delete it first. note
* that the definition of matching, and the action taken, differs
* depending on whether the file is a volume label or not:
* . for a volume label, *any* existing volume label matches
* and will be deleted (reference: Rainbow TOS Release Notes)
* . for other files, the name must match, and the existing
* file will be deleted unless (a) it's read-only or a folder
* or (b) the file being created is a folder.
*/
pos = 0;
if (attr == FA_VOL)
f = scan(dn,"*.*",FA_VOL,&pos);
else f = scan(dn,s,FA_NORM|FA_SUBDIR,&pos);
if (f) /* found matching file / label */
{
if (attr != FA_VOL) /* for normal files, need to check more stuff */
{
/* M01.01.0730.01 */
if ((f->f_attrib & (FA_SUBDIR | FA_RO)) || (attr == FA_SUBDIR))
return EACCDN; /* subdir or read only */
}
pos -= 32;
ixdel(dn,f,pos);
}
else
pos = 0;
/* now scan for empty space */
/* M01.01.SCC.FS.02 */
while( !( f = scan(dn,n,0xff,&pos) ) )
{
/* not in current dir, need to grow */
if (!fd->o_dnode) /* but can't grow root */
return EACCDN;
if ( nextcl(fd,1) )
return EACCDN;
f = dirinit(dn);
pos = 0;
}
builds(s,a);
pos -= 32;
f->f_attrib = attr;
for (i = 0; i < 10; i++)
f->f_fill[i] = 0;
f->f_td.time = current_time;
swpw(f->f_td.time);
f->f_td.date = current_date;
swpw(f->f_td.date);
f->f_clust = 0;
f->f_fileln = 0;
ixlseek(fd,pos);
ixwrite(fd,11L,a); /* write name, set dirty flag */
ixclose(fd,CL_DIR); /* partial close to flush */
ixlseek(fd,pos);
s = (char*) ixread(fd,32L,NULL);
f2 = rc = opnfil((FCB*)s,dn,(f->f_attrib&FA_RO)?RO_MODE:RW_MODE);
if (rc < 0)
return rc;
getofd(f2)->o_flag |= O_DIRTY;
return f2;
}
/*
** ixclose -
**
** Error returns EINTRN
**
** Last modified SCC 10 Apr 85
**
** NOTE: I'm not sure that returning immediately upon an error from
** ixlseek() is the right thing to do. Some data structures may
** not be updated correctly. Watch out for this!
** Also, I'm not sure that the EINTRN return is ok.
*/
long ixclose(OFD *fd, int part)
{ /* M01.01.03 */
OFD *p, **q;
int i; /* M01.01.03 */
BCB *b;
/*
* if the file or folder has been modified, we need to make sure
* that the date/time, starting cluster, and file length in the
* directory entry are updated. In addition, for files, we must
* set the archive flag.
*
* The following code avoids multiple ixlseek()/ixlread()/ixlwrite()
* sequences by just getting a pointer to a buffer containing the
* FCB, and updating it directly. We must do an ixwrite() at the
* end so that the buffer is marked as dirty and is subsequently
* written.
*/
if (fd->o_flag & O_DIRTY)
{
FCB *fcb;
UBYTE attr;
ixlseek(fd->o_dirfil,fd->o_dirbyt); /* start of dir entry */
fcb = (FCB *)ixread(fd->o_dirfil,32L,NULL);
attr = fcb->f_attrib; /* get attributes */
memcpy(&fcb->f_td,&fd->o_td,10); /* copy date/time, start, length */
swpw(fcb->f_clust); /* & fixup byte order */
swpl(fcb->f_fileln);
if (part & CL_DIR)
fcb->f_fileln = 0L; /* dir lengths on disk are zero */
else
attr |= FA_ARCHIVE; /* set the archive flag for files */
ixlseek(fd->o_dirfil,fd->o_dirbyt+11); /* seek to attrib byte */
ixwrite(fd->o_dirfil,1,&attr); /* & rewrite it */
}
if ((!part) || (part & CL_FULL))
{
q = &fd->o_dnode->d_files;
for (p = *q; p ; p = *(q = &p->o_link))
if (p == fd)
break;
/* someone else has this file open **** TBA */
if (p)
*q = p->o_link;
else
return EINTRN; /* some kind of internal error */
}
/* only flush to appropriate drive ***** TBA ******/
for (i = 0; i < 2; i++)
for (b = bufl[i]; b; b = b->b_link)
flush(b);
return E_OK;
}
/*ARGSUSED*/
long xrename(int n, char *p1, char *p2)
{
register OFD *fd2;
OFD *f1,*fd;
FCB *f;
DND *dn1,*dn2;
const char *s1,*s2;
char buf[11];
int hnew,att;
long rc, h1;
if (!ixsfirst(p2,0,(DTAINFO *)0L))
return(EACCDN);
if ((long)(dn1 = findit(p1,&s1,0)) < 0) /* M01.01.1212.01 */
return( (long)dn1 );
if (!dn1) /* M01.01.1214.01 */
return( EPTHNF );
if ((long)(dn2 = findit(p2,&s2,0)) < 0) /* M01.01.1212.01 */
return( (long)dn2 );
if (!dn2) /* M01.01.1214.01 */
return( EPTHNF );
if (contains_illegal_characters(s2))
return( EACCDN ) ;
if ((h1 = xopen(p1, 2)) < 0L)
return (h1);
f1 = getofd ((int)h1);
fd = f1->o_dirfil;
buf[0] = 0xe5;
ixlseek(fd,f1->o_dirbyt);
if (dn1 != dn2)
{
/* get old attribute */
f = (FCB *) ixread(fd,32L,NULLPTR);
att = f->f_attrib;
/* erase (0xe5) old file */
ixlseek(fd,f1->o_dirbyt);
ixwrite(fd,1L,buf);
/* copy time/date/clust, etc. */
ixlseek(fd,f1->o_dirbyt + 22);
ixread(fd,10L,buf);
hnew = xcreat(p2,att);
fd2 = getofd(hnew);
ixlseek(fd2->o_dirfil,fd2->o_dirbyt + 22);
ixwrite(fd2->o_dirfil,10L,buf);
fd2->o_flag &= ~O_DIRTY;
xclose(hnew);
ixclose(fd2->o_dirfil,CL_DIR);
}
else
{
builds(s2,buf);
ixwrite(fd,11L,buf);
}
if ((rc = xclose((int)h1)) < 0L)
return(rc);
return(ixclose(fd,CL_DIR));
}
