145 lines
4.1 KiB
C
145 lines
4.1 KiB
C
/*
|
|
* linux/fs/hpfs/name.c
|
|
*
|
|
* Mikulas Patocka (mikulas@artax.karlin.mff.cuni.cz), 1998-1999
|
|
*
|
|
* operations with filenames
|
|
*/
|
|
|
|
#include "hpfs_fn.h"
|
|
|
|
static char *text_postfix[]={
|
|
".ASM", ".BAS", ".BAT", ".C", ".CC", ".CFG", ".CMD", ".CON", ".CPP", ".DEF",
|
|
".DOC", ".DPR", ".ERX", ".H", ".HPP", ".HTM", ".HTML", ".JAVA", ".LOG", ".PAS",
|
|
".RC", ".TEX", ".TXT", ".Y", ""};
|
|
|
|
static char *text_prefix[]={
|
|
"AUTOEXEC.", "CHANGES", "COPYING", "CONFIG.", "CREDITS", "FAQ", "FILE_ID.DIZ",
|
|
"MAKEFILE", "READ.ME", "README", "TERMCAP", ""};
|
|
|
|
void hpfs_decide_conv(struct inode *inode, unsigned char *name, unsigned len)
|
|
{
|
|
struct hpfs_inode_info *hpfs_inode = hpfs_i(inode);
|
|
int i;
|
|
if (hpfs_inode->i_conv != CONV_AUTO) return;
|
|
for (i = 0; *text_postfix[i]; i++) {
|
|
int l = strlen(text_postfix[i]);
|
|
if (l <= len)
|
|
if (!hpfs_compare_names(inode->i_sb, text_postfix[i], l, name + len - l, l, 0))
|
|
goto text;
|
|
}
|
|
for (i = 0; *text_prefix[i]; i++) {
|
|
int l = strlen(text_prefix[i]);
|
|
if (l <= len)
|
|
if (!hpfs_compare_names(inode->i_sb, text_prefix[i], l, name, l, 0))
|
|
goto text;
|
|
}
|
|
hpfs_inode->i_conv = CONV_BINARY;
|
|
return;
|
|
text:
|
|
hpfs_inode->i_conv = CONV_TEXT;
|
|
return;
|
|
}
|
|
|
|
static inline int not_allowed_char(unsigned char c)
|
|
{
|
|
return c<' ' || c=='"' || c=='*' || c=='/' || c==':' || c=='<' ||
|
|
c=='>' || c=='?' || c=='\\' || c=='|';
|
|
}
|
|
|
|
static inline int no_dos_char(unsigned char c)
|
|
{ /* Characters that are allowed in HPFS but not in DOS */
|
|
return c=='+' || c==',' || c==';' || c=='=' || c=='[' || c==']';
|
|
}
|
|
|
|
static inline unsigned char upcase(unsigned char *dir, unsigned char a)
|
|
{
|
|
if (a<128 || a==255) return a>='a' && a<='z' ? a - 0x20 : a;
|
|
if (!dir) return a;
|
|
return dir[a-128];
|
|
}
|
|
|
|
unsigned char hpfs_upcase(unsigned char *dir, unsigned char a)
|
|
{
|
|
return upcase(dir, a);
|
|
}
|
|
|
|
static inline unsigned char locase(unsigned char *dir, unsigned char a)
|
|
{
|
|
if (a<128 || a==255) return a>='A' && a<='Z' ? a + 0x20 : a;
|
|
if (!dir) return a;
|
|
return dir[a];
|
|
}
|
|
|
|
int hpfs_chk_name(unsigned char *name, unsigned *len)
|
|
{
|
|
int i;
|
|
if (*len > 254) return -ENAMETOOLONG;
|
|
hpfs_adjust_length(name, len);
|
|
if (!*len) return -EINVAL;
|
|
for (i = 0; i < *len; i++) if (not_allowed_char(name[i])) return -EINVAL;
|
|
if (*len == 1) if (name[0] == '.') return -EINVAL;
|
|
if (*len == 2) if (name[0] == '.' && name[1] == '.') return -EINVAL;
|
|
return 0;
|
|
}
|
|
|
|
char *hpfs_translate_name(struct super_block *s, unsigned char *from,
|
|
unsigned len, int lc, int lng)
|
|
{
|
|
char *to;
|
|
int i;
|
|
if (hpfs_sb(s)->sb_chk >= 2) if (hpfs_is_name_long(from, len) != lng) {
|
|
printk("HPFS: Long name flag mismatch - name ");
|
|
for (i=0; i<len; i++) printk("%c", from[i]);
|
|
printk(" misidentified as %s.\n", lng ? "short" : "long");
|
|
printk("HPFS: It's nothing serious. It could happen because of bug in OS/2.\nHPFS: Set checks=normal to disable this message.\n");
|
|
}
|
|
if (!lc) return from;
|
|
if (!(to = kmalloc(len, GFP_KERNEL))) {
|
|
printk("HPFS: can't allocate memory for name conversion buffer\n");
|
|
return from;
|
|
}
|
|
for (i = 0; i < len; i++) to[i] = locase(hpfs_sb(s)->sb_cp_table,from[i]);
|
|
return to;
|
|
}
|
|
|
|
int hpfs_compare_names(struct super_block *s, unsigned char *n1, unsigned l1,
|
|
unsigned char *n2, unsigned l2, int last)
|
|
{
|
|
unsigned l = l1 < l2 ? l1 : l2;
|
|
unsigned i;
|
|
if (last) return -1;
|
|
for (i = 0; i < l; i++) {
|
|
unsigned char c1 = upcase(hpfs_sb(s)->sb_cp_table,n1[i]);
|
|
unsigned char c2 = upcase(hpfs_sb(s)->sb_cp_table,n2[i]);
|
|
if (c1 < c2) return -1;
|
|
if (c1 > c2) return 1;
|
|
}
|
|
if (l1 < l2) return -1;
|
|
if (l1 > l2) return 1;
|
|
return 0;
|
|
}
|
|
|
|
int hpfs_is_name_long(unsigned char *name, unsigned len)
|
|
{
|
|
int i,j;
|
|
for (i = 0; i < len && name[i] != '.'; i++)
|
|
if (no_dos_char(name[i])) return 1;
|
|
if (!i || i > 8) return 1;
|
|
if (i == len) return 0;
|
|
for (j = i + 1; j < len; j++)
|
|
if (name[j] == '.' || no_dos_char(name[i])) return 1;
|
|
return j - i > 4;
|
|
}
|
|
|
|
/* OS/2 clears dots and spaces at the end of file name, so we have to */
|
|
|
|
void hpfs_adjust_length(unsigned char *name, unsigned *len)
|
|
{
|
|
if (!*len) return;
|
|
if (*len == 1 && name[0] == '.') return;
|
|
if (*len == 2 && name[0] == '.' && name[1] == '.') return;
|
|
while (*len && (name[*len - 1] == '.' || name[*len - 1] == ' '))
|
|
(*len)--;
|
|
}
|