Userland: Move command-line utilities to Userland/Utilities/

1 files changed, 75 insertions, 0 deletions

diff --git a/Userland/Utilities/more.cpp b/Userland/Utilities/more.cpp
new file mode 100644
index 0000000000..94b34e44cb
--- /dev/null
+++ b/Userland/Utilities/more.cpp
@@ -0,0 +1,75 @@
+/*
+ * Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice, this
+ *    list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <fcntl.h>
+#include <stdio.h>
+#include <sys/ioctl.h>
+#include <unistd.h>
+
+static int key_fd;
+
+static void wait_for_key()
+{
+    printf("\033[7m--[ more ]--\033[0m");
+    fflush(stdout);
+    char dummy;
+    [[maybe_unused]] auto rc = read(key_fd, &dummy, 1);
+    printf("\n");
+}
+
+int main([[maybe_unused]] int argc, [[maybe_unused]] char** argv)
+{
+    if (pledge("stdio rpath tty", nullptr) < 0) {
+        perror("pledge");
+        return 1;
+    }
+
+    key_fd = STDOUT_FILENO;
+
+    struct winsize ws;
+    ioctl(1, TIOCGWINSZ, &ws);
+
+    if (pledge("stdio", nullptr) < 0) {
+        perror("pledge");
+        return 1;
+    }
+
+    unsigned lines_printed = 0;
+    while (!feof(stdin)) {
+        char buffer[BUFSIZ];
+        auto* str = fgets(buffer, sizeof(buffer), stdin);
+        if (!str)
+            break;
+        printf("%s", str);
+        ++lines_printed;
+        if ((lines_printed % (ws.ws_row - 1)) == 0) {
+            wait_for_key();
+        }
+    }
+
+    close(key_fd);
+    return 0;
+}