FreeCalypso > hg > freecalypso-tools
view target-utils/libtiffs/init.c @ 921:74d284add54d
fc-fsio: guard against bogus readdir results from the target
If the FFS being operated on contains SE K2x0 extended filenames,
readdir will return strings that are bad for printing. We need to
guard against this possibility, and also against possible other
bogosity that could be sent by other alien firmwares.
author | Mychaela Falconia <falcon@freecalypso.org> |
---|---|
date | Sat, 31 Dec 2022 22:55:23 +0000 |
parents | c10a65f7563e |
children |
line wrap: on
line source
#include "types.h" #include "struct.h" #include "globals.h" #include "macros.h" static const u8 ffs_sector_signature[6] = {'F', 'f', 's', '#', 0x10, 0x02}; static find_indexblk() { u32 sector_addr; u8 *sector_ptr; int i; printf("Looking for TIFFS active index block\n"); sector_addr = tiffs_base_addr; for (i = 0; i < tiffs_nsectors; i++) { sector_ptr = (u8 *) sector_addr; if (!bcmp(sector_ptr, ffs_sector_signature, 6) && sector_ptr[8] == 0xAB) { printf("Found at %08X\n", sector_addr); tiffs_active_index = (struct inode *) sector_ptr; return(0); } sector_addr += tiffs_sector_size; } printf("Error: Not found in any of the %d candidate sectors\n", tiffs_nsectors); return(-1); } static find_rootino() { int ino; struct inode *irec; printf("Looking for the root inode\n"); for (ino = 1; ; ino++) { if (ino >= tiffs_sector_size >> 4) { printf("Error: Hit end of sector, no root inode found\n"); return(-1); } irec = tiffs_active_index + ino; if (irec->type == OBJTYPE_DIR && *inode_to_dataptr(irec) == '/') break; } printf("Found at inode #%x\n", ino); tiffs_root_ino = ino; return(0); } tiffs_init() { int stat; if (tiffs_init_done) return(0); stat = find_indexblk(); if (stat < 0) return(stat); stat = find_rootino(); if (stat < 0) return(stat); tiffs_init_done = 1; return(0); }