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9dfcbc58ec
This new version can do three things: * When invoked as `mount`, it will print out a list of mounted filesystem, * When invoked as `mount -a`, it will try to mount filesystems listed in /etc/fstab, * When invoked as `mount device mountpoint -t fstype`, it will mount that device on that mountpoint. If not specified, fstype defaults to ext2.
115 lines
3.5 KiB
C++
115 lines
3.5 KiB
C++
#include <AK/JsonArray.h>
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#include <AK/JsonObject.h>
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#include <AK/JsonValue.h>
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#include <LibCore/CArgsParser.h>
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#include <LibCore/CFile.h>
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#include <stdio.h>
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#include <unistd.h>
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bool mount_all()
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{
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// Mount all filesystems listed in /etc/fstab.
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dbg() << "Mounting all filesystems...";
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CFile fstab { "/etc/fstab" };
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if (!fstab.open(CIODevice::OpenMode::ReadOnly)) {
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fprintf(stderr, "Failed to open /etc/fstab: %s\n", fstab.error_string());
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return false;
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}
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bool all_ok = true;
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while (fstab.can_read_line()) {
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ByteBuffer buffer = fstab.read_line(1024);
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StringView line_view = (const char*)buffer.data();
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// Trim the trailing newline, if any.
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if (line_view.length() > 0 && line_view[line_view.length() - 1] == '\n')
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line_view = line_view.substring_view(0, line_view.length() - 1);
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String line = line_view;
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Vector<String> parts = line.split('\t');
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if (parts.size() < 3) {
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fprintf(stderr, "Invalid fstab entry: %s\n", line.characters());
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all_ok = false;
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continue;
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}
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const char* devname = parts[0].characters();
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const char* mountpoint = parts[1].characters();
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const char* fstype = parts[2].characters();
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if (strcmp(mountpoint, "/") == 0) {
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dbg() << "Skipping mounting root";
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continue;
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}
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dbg() << "Mounting " << devname << "(" << fstype << ")"
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<< " on " << mountpoint;
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int rc = mount(devname, mountpoint, fstype);
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if (rc != 0) {
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fprintf(stderr, "Failed to mount %s (%s) on %s: %s\n", devname, fstype, mountpoint, strerror(errno));
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all_ok = false;
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continue;
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}
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}
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return all_ok;
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}
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bool print_mounts()
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{
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// Output info about currently mounted filesystems.
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CFile df("/proc/df");
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if (!df.open(CIODevice::ReadOnly)) {
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fprintf(stderr, "Failed to open /proc/df: %s\n", df.error_string());
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return false;
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}
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auto content = df.read_all();
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auto json = JsonValue::from_string(content).as_array();
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json.for_each([](auto& value) {
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auto fs_object = value.as_object();
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auto class_name = fs_object.get("class_name").to_string();
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auto mount_point = fs_object.get("mount_point").to_string();
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auto device = fs_object.get("device").as_string_or(class_name);
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printf("%s on %s type %s\n", device.characters(), mount_point.characters(), class_name.characters());
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});
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return true;
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}
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int main(int argc, char** argv)
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{
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CArgsParser args_parser("mount");
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args_parser.add_arg("devname", "device path");
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args_parser.add_arg("mountpoint", "mount point");
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args_parser.add_arg("t", "fstype", "file system type");
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args_parser.add_arg("a", "mount all systems listed in /etc/fstab");
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CArgsParserResult args = args_parser.parse(argc, argv);
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if (args.is_present("a")) {
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return mount_all() ? 0 : 1;
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}
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switch (args.get_single_values().size()) {
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case 0:
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return print_mounts() ? 0 : 1;
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case 2: {
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String devname = args.get_single_values()[0];
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String mountpoint = args.get_single_values()[1];
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String fstype = args.is_present("t") ? args.get("t") : "ext2";
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if (mount(devname.characters(), mountpoint.characters(), fstype.characters()) < 0) {
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perror("mount");
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return 1;
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}
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return 0;
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}
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default:
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args_parser.print_usage();
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return 1;
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}
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}
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