Initial commit: add cat and yes

README.org

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+#+TITLE: GRU coreutils

src/.gitignore

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+*
+!.gitignore
+!cat.c
+!yes.c
+!Makefile

src/Makefile

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+CC = gcc
+CFLAGS= -Wall -Wextra
+LFLAGS=
+
+all: cat yes
+
+main: $(OBJFILES) 
+	$(CC) cat.c -o cat
+	$(CC) yes.c -o yes
+
+test: main
+	./cat ../tests/test.txt

src/cat.c

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+#include <stdio.h>
+
+int main(int argc, char *argv[]){
+	char ch;
+	for (int i = 1; i < argc; i++) {
+		FILE *file = fopen(argv[i], "r");
+		if (file == NULL ) {
+			printf("Cannot find file: %s\n", argv[1]);
+			return 1;
+		}
+
+		while ((ch = fgetc(file)) != EOF)
+       		{
+			printf("%c", ch);
+	        }
+		fclose(file);
+	}
+}

src/yes.c

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+#include <stdio.h>
+#include <string.h>
+
+int main(int argc, char *argv[]) {
+	char *output = "y";
+	if (argc >= 1) {
+		while (1) {
+			for (int i = 1; i < argc; i++)
+				printf("%s ", argv[i]);
+			printf("\n");
+		}
+	} else {
+		while (1) {
+			printf("%s\n", output);
+		}
+	}
+}

tests/cat-test.txt

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+Test
+Test
+123