initial commit

Makefile

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+j: main.c
+	gcc -pedantic -Wall -Wextra main.c -o j
+install: j j.1
+	cp j $(HOME)/.local/bin/
+	cp j.1 $(HOME)/.local/man/man1

README.md

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+This is a simple program which can join lines from stdin. The program is
+only 27 loc. I won\'t add features like pasting lines inside of a file.
+You can do everything just using stdin/stdout. Another advantage of this
+simple implementation that it does not use heap, only stack. This
+reduces the chance of getting corrupted memory. Althought This program
+provides better defaults (coma is the default separator), we sacrifice
+the speed for input containing many line. For that purpoce: use paste
+-sd,

j.1

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+.Dd 2021-Jul-04 01:22:05 PM CEST
+.Dt j 1
+.Os
+.Sh NAME
+.Nm j
+.Nd A simple joiner program, even more simple than paste
+.Sh SYNOPSIS
+.Nm
+.Op Ar separator
+.Sh DESCRIPTION
+.Nm
+This is a simple program which can join lines from stdin. The program is only 27 loc. I won't add features like pasting lines inside of a file. You can do everything just using stdin/stdout. Another advantage of this simple implementation that it does not use heap, only stack. This reduces the chance of getting corrupted memory. Althought  This program provides better defaults (coma is the default separator), We sacrifice the speed for input containing many line. For that purpoce: use paste -sd,
+
+.Sh AUTHOR
+.An Roland Hollós Aq Mt hollorol@rolandhollos.xyz

main.c

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+#include<stdio.h>
+#include<stdlib.h>
+#include<string.h>
+
+#define MAX_LINE_LENGTH 200
+
+int main(int argc, char** argv){
+    char sep = ',';
+    if(argc > 1){
+        sep = argv[1][0];
+    }
+
+    char line[MAX_LINE_LENGTH];
+    fgets(line,MAX_LINE_LENGTH, stdin);
+    line[strlen(line)-1] = '\0';
+    printf("%s",line);
+
+    while(fgets(line,MAX_LINE_LENGTH, stdin) != NULL){
+        line[strlen(line)-1] = '\0';
+        printf("%c%s",sep,line);
+    }
+
+    printf("\n");
+
+
+    return 0;
+}