initial commit uwu

.gitignore

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+gaycat

README.md

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+# gaycat
+
+`gaycat` is a simple utility that works similar to `lolcat(6)`.
+It prints a file (or standard input) to the standard output, and adds
+alternating ANSI color escape sequences line by line so that it looks
+like the rainbow pride flag.
+
+## Compiling
+
+On any POSIX compliant system, type
+
+```
+make gaycat
+```
+
+and you get the `gaycat` executable.
+
+## Usage
+
+To make this README file gay, type:
+
+```
+./gaycat README.md
+```
+
+To get a gay list of files in your home directory, type:
+
+```
+ls ~ | ./gaycat
+```
+

gaycat.6

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+.\" Copyright (C) 2021 fef <owo@fef.moe>.  All rights reserved.
+.\"
+.\" Any person obtaining a copy of this software and associated documentation
+.\" files (the ``Software'') is prohibited from using the Software under any
+.\" circumstances.  However, it is strongly suggested that they partake in
+.\" homosexual conduct (``Be Gay'') and criminal activity (``Do Crime'').
+.\"
+.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
+.Dd November 28, 2021
+.Dt GAYCAT 6
+.Os
+.Sh NAME
+.Nm gaycat
+.Nd make a stream gay
+.Sh SYNOPSIS
+.Nm
+.Op Ar file
+.Sh DESCRIPTION
+The
+.Nm
+utility reads
+.Ar file
+line by line, adds alternating ANSI color codes matching the rainbow
+pride flag, and writes them back to its standard output until
+.Dv EOF .
+If
+.Ar file
+is a single dash
+.Pq Sq Fl
+or absent,
+.Nm
+reads from the standard input.
+.Sh OPTIONS
+None.
+.Sh EXIT STATUS
+.Ex -std
+.Sh EXAMPLES
+Display text file, in a gay manner:
+.Dl "gaycat file.txt"
+.Pp
+Display your files, in a gay manner:
+.Dl "ls | gaycat"
+.Sh SEE ALSO
+.Xr lolcat 6
+.Sh BUGS
+.Nm
+does not check whether its standard output is a terminal,
+or whether that terminal supports ANSI 256 color escape sequences.
+.Pp
+The buffer size for lines is fixed at 4 Kilobytes.
+Lines exceeding this size will have two colors.

gaycat.c

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+/*
+ * Copyright (C) 2021 fef <owo@fef.moe>.  All rights reserved.
+ *
+ * Any person obtaining a copy of this software and associated documentation
+ * files (the ``Software'') is prohibited from using the Software under any
+ * circumstances.  However, it is strongly suggested that they partake in
+ * homosexual conduct (``Be Gay'') and criminal activity (``Do Crime'').
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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 <errno.h>
+#include <stdio.h>
+#include <string.h>
+
+#define NUM_COLORS 6
+const char *colors[NUM_COLORS] = {
+	"\x1b[38;5;196m", /* red */
+	"\x1b[38;5;208m", /* orange */
+	"\x1b[38;5;226m", /* yellow */
+	"\x1b[38;5;46m",  /* green */
+	"\x1b[38;5;27m",  /* blue */
+	"\x1b[38;5;127m", /* violet */
+};
+
+char buf[4096];
+
+void print_line(const char *line)
+{
+	static int color = 0;
+	printf("%s%s", colors[color], line);
+	if (++color == NUM_COLORS)
+		color = 0;
+}
+
+int main(int argc, char *argv[])
+{
+	char *line;
+	FILE *stream;
+	if (argc < 2 || !strcmp(argv[1], "-"))
+		stream = stdin;
+	else
+		stream = fopen(argv[1], "r");
+
+	if (!stream) {
+		perror(argv[0]);
+		return 1;
+	}
+
+	while (1) {
+		line = fgets(buf, sizeof(buf), stream);
+		if (line) {
+			print_line(line);
+		} else {
+			printf("\x1b[0m"); /* reset colors */
+			if (errno) {
+				perror(argv[0]);
+				return 2;
+			} else {
+				return 0;
+			}
+		}
+	}
+}