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/* IBM_PROLOG_BEGIN_TAG */
/* This is an automatically generated prolog. */
/* */
/* $Source: fcp/src/cmd_trunc.c $ */
/* */
/* OpenPOWER FFS Project */
/* */
/* Contributors Listed Below - COPYRIGHT 2014,2015 */
/* [+] International Business Machines Corp. */
/* */
/* */
/* Licensed under the Apache License, Version 2.0 (the "License"); */
/* you may not use this file except in compliance with the License. */
/* You may obtain a copy of the License at */
/* */
/* http://www.apache.org/licenses/LICENSE-2.0 */
/* */
/* Unless required by applicable law or agreed to in writing, software */
/* distributed under the License is distributed on an "AS IS" BASIS, */
/* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or */
/* implied. See the License for the specific language governing */
/* permissions and limitations under the License. */
/* */
/* IBM_PROLOG_END_TAG */
/*
* File: cmd_trunc.c
* Author: Shaun Wetzstein <shaun@us.ibm.com>
* Descr: trunc implementation
* Date: 01/30/2013
*/
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <string.h>
#include <stdint.h>
#include <stdlib.h>
#include <stdio.h>
#include <stdbool.h>
#include <unistd.h>
#include <getopt.h>
#include <errno.h>
#include <ctype.h>
#include <regex.h>
#include <clib/attribute.h>
#include <clib/assert.h>
#include <clib/list.h>
#include <clib/list_iter.h>
#include <clib/misc.h>
#include <clib/min.h>
#include <clib/err.h>
#include <clib/raii.h>
#include "misc.h"
#include "main.h"
static int __trunc(args_t * args, off_t offset)
{
assert(args != NULL);
char * type = args->dst_type;
char * target = args->dst_target;
char * name = args->dst_name;
RAII(FILE*, file, __fopen(type, target, "r+", debug), fclose);
if (file == NULL)
return -1;
if (check_file(target, file, offset) < 0)
return -1;
RAII(ffs_t*, ffs, __ffs_fopen(file, offset), __ffs_fclose);
if (ffs == NULL)
return -1;
if (ffs->count <= 0)
return 0;
uint32_t block_size;
if (__ffs_info(ffs, FFS_INFO_BLOCK_SIZE, &block_size) < 0)
return -1;
if (args->buffer != NULL) {
uint32_t buffer;
if (parse_size(args->buffer, &buffer) < 0)
return -1;
if (__ffs_buffer(ffs, buffer) < 0)
return -1;
}
ffs_entry_t entry;
if (__ffs_entry_find(ffs, name, &entry) == false) {
UNEXPECTED("partition entry '%s' not found\n", name);
return -1;
}
char full_name[page_size];
if (__ffs_entry_name(ffs, &entry, full_name,
sizeof full_name) < 0)
return -1;
if (entry.type == FFS_TYPE_LOGICAL) {
if (args->verbose == f_VERBOSE)
fprintf(stderr, "%8llx: %s: logical (skip)\n",
(long long)offset, full_name);
return 0;
}
if (args->protected != f_PROTECTED &&
entry.flags && FFS_FLAGS_PROTECTED) {
if (args->verbose == f_VERBOSE)
fprintf(stderr, "%8llx: %s: protected (skip)\n",
(long long)offset, full_name);
return 0;
}
uint32_t size = 0;
if (args->opt_nr == 1) {
size = entry.size * block_size;
} else if (args->opt_nr == 2) {
if (parse_number(args->opt[1], &size) < 0)
return -1;
}
if (__ffs_entry_truncate(ffs, full_name, size) < 0) {
ERRNO(errno);
return -1;
}
if (args->verbose == f_VERBOSE)
fprintf(stderr, "%8llx: %s: truncate '%x' (done)\n",
(long long)offset, full_name, size);
return 0;
}
int command_trunc(args_t * args)
{
assert(args != NULL);
int rc = 0;
char * end = (char *)args->offset;
while (rc == 0 && end != NULL && *end != '\0') {
errno = 0;
off_t offset = strtoull(end, &end, 0);
if (end == NULL || errno != 0) {
UNEXPECTED("invalid --offset specified '%s'",
args->offset);
return -1;
}
if (*end != ',' && *end != ':' && *end != '\0') {
UNEXPECTED("invalid --offset separator "
"character '%c'", *end);
return -1;
}
rc = __trunc(args, offset);
if (rc < 0)
break;
if (*end == '\0')
break;
end++;
}
return rc;
}
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