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https://github.com/EnderIce2/Fennix.git
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EnderIce2
557c7e6235
This is the fourth time re-writing the VFS, hope this will be the last. Tried to make it as modular as possible so this won't be necessary in the future. 🙏
This change required the entire kernel code to be modified.
110 lines
2.5 KiB
C++
110 lines
2.5 KiB
C++
/*
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This file is part of Fennix Kernel.
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Fennix Kernel is free software: you can redistribute it and/or
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modify it under the terms of the GNU General Public License as
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published by the Free Software Foundation, either version 3 of
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the License, or (at your option) any later version.
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Fennix Kernel is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with Fennix Kernel. If not, see <https://www.gnu.org/licenses/>.
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*/
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#include "../cmds.hpp"
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#include <fs/vfs.hpp>
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#include <acpi.hpp>
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#include "../../kernel.h"
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using namespace vfs;
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void cmd_dump(const char *args)
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{
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if (args[0] == '\0')
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return;
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// args == "0xdeadbeef 512" aka "address size"
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char *strAddr = (char *)args;
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char *strLen = (char *)args;
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while (*strLen != ' ')
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strLen++;
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*strLen = '\0';
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strLen++;
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void *Address;
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unsigned long Length = strtoul(strLen, nullptr, 10);
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Node root = fs->GetRoot(0);
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Node fileNode = fs->Lookup(root, strAddr);
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if (fileNode && !fileNode->IsDirectory() && !fileNode->IsFIFO() && !fileNode->IsSocket())
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{
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kstat stat;
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int status = fs->Stat(fileNode, &stat);
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if (status != 0)
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{
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printf("cannot get stat: %s\n", strerror(status));
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return;
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}
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size_t size = stat.Size > (off_t)Length ? Length : stat.Size;
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Address = new char[size]; /* FIXME: memory leak */
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size_t read = fs->Read(fileNode, Address, size, 0);
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if (read < Length)
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{
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debug("clamp %lu to %lu", Length, read);
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Length = read;
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}
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}
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else
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{
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if (fileNode)
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{
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printf("file %s cannot be dumped\n", strAddr);
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return;
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}
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Address = (void *)strtoul(strAddr, nullptr, 16);
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debug("address %s", strAddr);
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}
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{
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unsigned char *AddressChar = (unsigned char *)Address;
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unsigned char Buffer[17];
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uint32_t Iterate;
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printf("Dumping %lu bytes from %#lx\n", Length, (uintptr_t)AddressChar);
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for (Iterate = 0; Iterate < (uint32_t)Length; Iterate++)
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{
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if ((Iterate % 16) == 0)
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{
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if (Iterate != 0)
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printf(" %s\n", Buffer);
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printf(" %04x ", Iterate);
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}
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printf(" %02x", AddressChar[Iterate]);
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if ((AddressChar[Iterate] < 0x20) || (AddressChar[Iterate] > 0x7E))
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Buffer[Iterate % 16] = '.';
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else
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Buffer[Iterate % 16] = AddressChar[Iterate];
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Buffer[(Iterate % 16) + 1] = '\0';
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}
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while ((Iterate % 16) != 0)
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{
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printf(" ");
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Iterate++;
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}
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putchar('\n');
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}
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}
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