ssize_t ffs_entry_truncate_no_pad(ffs_t * self, const char *path, off_t offset) { ssize_t rc = __ffs_entry_truncate(self, path, offset); if (rc < 0) { err_t *err = err_get(); assert(err != NULL); __error.errnum = err_code(err); snprintf(__error.errstr, sizeof __error.errstr, "%s: %s : %s(%d) : (code=%d) %.*s\n", program_invocation_short_name, err_type_name(err), err_file(err), err_line(err), err_code(err), err_size(err), (char *)err_data(err)); rc = -1; } return rc; }
int command_trunc(args_t * args) { assert(args != NULL); char name[strlen(args->name) + 2]; strcpy(name, args->name); if (strrchr(name, '$') == NULL) strcat(name, "$"); off_t __poffset; ffs_t * __ffs; char full_name[page_size]; regex_t rx; /* ========================= */ int trunc_entry(ffs_entry_t * entry) { if (__ffs_entry_name(__ffs, entry, full_name, sizeof full_name) < 0) return -1; if (regexec(&rx, full_name, 0, NULL, 0) == REG_NOMATCH) return 0; if (entry->flags & FFS_FLAGS_PROTECTED && args->force != f_FORCE) { printf("%llx: %s: protected, skipping truncate\n", (long long)__poffset, full_name); return 0; } uint32_t size = entry->size * __ffs->hdr->block_size; if (args->size != NULL) if (parse_size(args->size, &size) < 0) return -1; if (__ffs_entry_truncate(__ffs, full_name, size) < 0) return -1; if (args->verbose == f_VERBOSE) printf("%llx: %s: truncate size '%x'\n", (long long)__poffset, full_name, size); return 0; } int trunc(args_t * args, off_t poffset) { __poffset = poffset; const char * target = args->target; int debug = args->debug; RAII(FILE*, file, fopen_generic(target, "r+", debug), fclose); if (file == NULL) return -1; RAII(ffs_t*, ffs, __ffs_fopen(file, poffset), __ffs_fclose); if (ffs == NULL) return -1; __ffs = ffs; int rc = __ffs_iterate_entries(ffs, trunc_entry); if (rc == 1) return -1; return rc; }