/* * 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)--; }