Ivan Baravy
be21f83af2
Fix most compilation issues of umka_shell on Windows(R)(TM), not all of them.
84 lines
2.4 KiB
C
84 lines
2.4 KiB
C
/*
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SPDX-License-Identifier: GPL-2.0-or-later
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UMKa - User-Mode KolibriOS developer tools
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vdisk - virtual disk, raw format
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Copyright (C) 2023 Ivan Baravy <dunkaist@gmail.com>
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*/
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#include <errno.h>
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#include <fcntl.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include "../trace.h"
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#include "umkaio.h"
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#include "raw.h"
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struct vdisk_raw {
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struct vdisk vdisk;
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int fd;
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};
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STDCALL void
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vdisk_raw_close(void *userdata) {
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COVERAGE_OFF();
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struct vdisk_raw *disk = userdata;
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close(disk->fd);
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free(disk);
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COVERAGE_ON();
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}
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STDCALL int
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vdisk_raw_read(void *userdata, void *buffer, off_t startsector,
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size_t *numsectors) {
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COVERAGE_OFF();
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struct vdisk_raw *disk = userdata;
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lseek(disk->fd, startsector * disk->vdisk.sect_size, SEEK_SET);
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io_read(disk->fd, buffer, *numsectors * disk->vdisk.sect_size,
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disk->vdisk.io);
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COVERAGE_ON();
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return KOS_ERROR_SUCCESS;
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}
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STDCALL int
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vdisk_raw_write(void *userdata, void *buffer, off_t startsector,
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size_t *numsectors) {
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COVERAGE_OFF();
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struct vdisk_raw *disk = userdata;
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lseek(disk->fd, startsector * disk->vdisk.sect_size, SEEK_SET);
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io_write(disk->fd, buffer, *numsectors * disk->vdisk.sect_size,
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disk->vdisk.io);
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COVERAGE_ON();
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return KOS_ERROR_SUCCESS;
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}
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struct vdisk*
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vdisk_init_raw(const char *fname, struct umka_io *io) {
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int fd = open(fname, O_RDONLY);
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if (!fd) {
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printf("[vdisk.raw]: can't open file '%s': %s\n", fname, strerror(errno));
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return NULL;
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}
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off_t fsize = lseek(fd, 0, SEEK_END);
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lseek(fd, 0, SEEK_SET);
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size_t sect_size = 512;
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if (strstr(fname, "s4096") != NULL || strstr(fname, "s4k") != NULL) {
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sect_size = 4096;
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}
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struct vdisk_raw *disk = (struct vdisk_raw*)malloc(sizeof(struct vdisk_raw));
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*disk = (struct vdisk_raw){
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.vdisk = {.diskfunc = {.strucsize = sizeof(diskfunc_t),
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.close = vdisk_raw_close,
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.read = vdisk_raw_read,
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.write = vdisk_raw_write,
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},
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.sect_size = sect_size,
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.sect_cnt = (uint64_t)fsize / sect_size,
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.io = io,
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},
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.fd = fd,
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};
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return (struct vdisk*)disk;
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}
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