333 lines
10 KiB
C
Executable File
333 lines
10 KiB
C
Executable File
/* By YZBruh */
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/**
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* Copyright 2024 Partition Manager
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#if defined(__cplusplus)
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extern "C" {
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#endif
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#include <stdio.h>
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#include <unistd.h>
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#include <stdlib.h>
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#include <sys/stat.h>
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#include <sys/statvfs.h>
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#include <string.h>
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#include <stdbool.h>
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#include <stddef.h>
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#include <errno.h>
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#include <err.h>
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#include <sysexits.h>
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#include <fcntl.h>
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#include <pmt.h>
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#define BFSIZE 1024
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extern char* out;
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extern char* format_fs;
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extern char* cust_cxt;
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extern char* target_partition;
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extern char* target_flash_file;
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extern char* partition_type;
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extern bool pmt_use_logical;
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extern bool pmt_use_cust_cxt;
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extern bool pmt_logical;
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extern bool pmt_flash;
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extern bool pmt_backup;
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extern bool pmt_silent;
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extern bool pmt_force_mode;
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/**
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* if progress_code is a
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* 1 = backup mode
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*
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* 2 = flash mode
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*
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* 3 = format mode
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*/
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/**
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* it is meant to calculate the size of the quickly given file.
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* its purpose is for rapid processing
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*/
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static double
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calc_flsz(const char* _Nonnull filepath)
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{
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static int calc_flsz_file;
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calc_flsz_file = open(filepath, O_RDONLY);
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if (calc_flsz_file == -1) return calc_flsz_file;
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static off_t flsz;
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flsz = lseek(calc_flsz_file, 0, SEEK_END);
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close(calc_flsz_file);
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if (flsz == (off_t)-1) return -1;
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return (double)flsz / (1024 * 1024);
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}
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/**
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* error that the partition is not found.
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* It's for quick action.
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*/
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static int
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partition_not_found(void)
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{
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if (!pmt_silent) errx(EX_OSFILE, "partition not found!");
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else return EX_OSFILE;
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}
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/**
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* unknown partition type error.
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* It's for quick action.
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*/
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static int
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invalid_partition_type(void)
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{
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if (!pmt_silent) errx(EX_USAGE, "invalid partition type!");
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else exit(EX_USAGE);
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return 0;
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}
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/* to stop use of function type */
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#define partition_not_found partition_not_found()
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#define invalid_partition_type invalid_partition_type()
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/**
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* The target file is controlled by the stat function.
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* Files, directories, links and blocks (disks) are for.
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* If it is never found, it returns 1 value.
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* If he finds 0 value is returned.
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* If the desired type is not in -1 value is returned.
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*/
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static int
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search_stat(const char* _Nonnull filepath, const char* _Nonnull stype)
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{
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struct stat search_stat;
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if (stat(filepath, &search_stat) != 0) return 1;
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if (strcmp(stype, "dir") == 0)
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{
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if (S_ISDIR(search_stat.st_mode)) return 0;
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else return -1;
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}
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else if (strcmp(stype, "file") == 0)
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{
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if (S_ISREG(search_stat.st_mode)) return 0;
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else return -1;
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}
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else if (strcmp(stype, "blk") == 0)
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{
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if (S_ISBLK(search_stat.st_mode)) return 0;
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else return -1;
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}
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else if (strcmp(stype, "link") == 0)
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{
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if (S_ISLNK(search_stat.st_mode)) return 0;
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else return -1;
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}
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return 2;
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}
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/* the partitions are meant to quickly find. */
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static void
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search_partition(const char* _Nonnull partition)
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{
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static int partition_results = 0;
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partition_results = search_stat(partition, "blk");
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if (partition_results == 1) partition_not_found;
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else if (partition_results == -1 && !pmt_silent) errx(EX_OSFILE, "the specified partition is not the block. I mean, it's not actually an episode (disc). I'm sure it needs to applaud those mistakes.");
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else exit(EX_OSFILE);
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}
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int pmt(unsigned short progress_code)
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{
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/* required variables */
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static int srcf, targetf;
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static char backupper_path[512];
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static char ppath[100];
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static char formatter_cmd[200];
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static char outf[512];
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static char flasher_path[512];
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static char buffer[BFSIZE];
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static ssize_t readed_data;
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static unsigned long long copied_data = 0;
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static unsigned long long count = 1024 * 1024 * 1024;
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if (progress_code == 1)
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{
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if (!pmt_use_logical)
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{
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if (pmt_use_cust_cxt) sprintf(backupper_path, "%s/%s", cust_cxt, target_partition);
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else sprintf(backupper_path, "/dev/block/by-name/%s", target_partition);
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}
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else if (pmt_use_logical) sprintf(backupper_path, "/dev/block/mapper/%s", target_partition);
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else return invalid_partition_type;
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search_partition(backupper_path);
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if (calc_flsz(backupper_path) != -1 && !pmt_silent) printf("Disk size of the partition to be backed up: %.2f\n", calc_flsz(backupper_path));
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else warnx(ANSI_YELLOW "failed to get target partition disk size" ANSI_RESET);
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srcf = open(backupper_path, O_RDONLY);
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if (srcf == -1)
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{
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if (!pmt_silent) errx(EX_OSFILE, "couldn't read: %s: %s", backupper_path, strerror(errno));
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else return EX_IOERR;
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}
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/* determine output */
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if (strcmp(out, target_partition) == 0)
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{
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sprintf(outf, "%s.img", target_partition);
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if (!pmt_silent) warnx(ANSI_YELLOW "warning: The output file name was not specified. The output file name will be: %s" ANSI_RESET, outf);
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}
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else sprintf(outf, "%s", target_partition);
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targetf = open(outf, O_WRONLY | O_CREAT | O_TRUNC, 0666);
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if (targetf == -1)
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{
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if (!pmt_silent) errx(EX_CANTCREAT, "couldn't generate: %s: %s", outf, strerror(errno));
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else return EX_CANTCREAT;
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}
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/* start writing */
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while ((readed_data = read(srcf, buffer, BFSIZE)) > 0 && copied_data < count)
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{
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ssize_t writed_data = write(targetf, buffer, readed_data);
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if (writed_data != readed_data)
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{
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if (!pmt_silent) warnx("couldn't write: %s: %s", backupper_path, strerror(errno));
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close(srcf);
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close(targetf);
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if (search_stat(outf, "file") == 0) remove(outf);
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return EX_IOERR;
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}
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copied_data += writed_data;
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}
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/* close files */
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close(srcf);
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close(targetf);
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if (!pmt_silent) printf("%sSuccess. Output: %s%s\n", ANSI_GREEN, outf, ANSI_RESET);
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}
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else if (progress_code == 2)
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{
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/* determine device block */
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/* for classic */
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if (!pmt_use_logical)
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{
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if (pmt_use_cust_cxt) sprintf(flasher_path, "%s/%s", cust_cxt, target_partition);
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else sprintf(flasher_path, "/dev/block/by-name/%s", target_partition);
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/* for logical */
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}
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else if (pmt_use_logical) sprintf(flasher_path, "/dev/block/mapper/%s", target_partition);
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else return invalid_partition_type;
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/* check partition */
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search_partition(flasher_path);
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if (calc_flsz(target_flash_file) != -1 && !pmt_force_mode) printf("Size of flash file: %.2f\n", calc_flsz(target_flash_file));
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else warnx(ANSI_YELLOW "failed to get flash file size" ANSI_RESET);
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if (calc_flsz(target_partition) != -1 && !pmt_force_mode) printf("Disk size of the target partition: %.2f\n", calc_flsz(target_partition));
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else warnx(ANSI_YELLOW "failed to get target partition disk size" ANSI_RESET);
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if (calc_flsz(target_flash_file) > calc_flsz(target_partition) && !pmt_silent) errx(EX__BASE, "size of the file to flash more than the partition size.");
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else return EX__BASE;
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srcf = open(target_flash_file, O_RDONLY);
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if (srcf == -1)
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{
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if (!pmt_force_mode) errx(EX_NOINPUT, "couldn't read: %s: %s", target_flash_file, strerror(errno));
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else return EX_IOERR;
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}
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targetf = open(target_partition, O_WRONLY | O_CREAT | O_TRUNC, 0666);
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if (targetf == -1)
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{
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if (!pmt_force_mode) errx(EX_OSFILE, "couldn't read: %s: %s", target_partition, strerror(errno));
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else return EX_IOERR;
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}
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/* start writing */
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while ((readed_data = read(srcf, buffer, BFSIZE)) > 0 && copied_data < count)
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{
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ssize_t writed_data = write(targetf, buffer, readed_data);
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if (writed_data != readed_data)
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{
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warnx("couldn't write: %s: %s", backupper_path, strerror(errno));
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close(srcf);
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close(targetf);
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return EX_IOERR;
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}
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copied_data += writed_data;
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}
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close(srcf);
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close(targetf);
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if (!pmt_force_mode) printf("%sSuccess.%s\n", ANSI_GREEN, ANSI_RESET);
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}
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else if (progress_code == 3)
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{
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/* generate partition extn */
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if (!pmt_use_logical)
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{
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if (pmt_use_cust_cxt) sprintf(ppath, "%s/%s", cust_cxt, target_partition);
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else sprintf(ppath, "/dev/block/by-name/%s", target_partition);
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/* for logical */
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}
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else if (pmt_use_logical) sprintf(ppath, "/dev/block/mapper/%s", target_partition);
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else return invalid_partition_type;
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/* check partition */
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search_partition(ppath);
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/* get target partition block size */
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struct statvfs file_sys_inf;
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if (statvfs(ppath, &file_sys_inf) != 0)
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{
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if (!pmt_force_mode) errx(EX_TEMPFAIL, "the partition block size could not be obtained!");
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else return EX_TEMPFAIL;
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}
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/* generate mke2fs command */
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sprintf(formatter_cmd, "mke2fs -Fq -t %s -b %lu %s", format_fs, file_sys_inf.f_bsize, ppath);
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/* run command */
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if (system(formatter_cmd) != 0)
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{
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if (!pmt_force_mode) errx(EX_TEMPFAIL, "formatting failed! There may be a chance that something has been damaged!");
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else return EX_TEMPFAIL;
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}
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}
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return 0;
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}
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#if defined(__cplusplus)
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}
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#endif /* __cplusplus */
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/* end of code */
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