Write a simple UNIX cat clone

exercises/coreutils/cat/Makefile

@@ -0,0 +1,19 @@
+CC      := gcc
+CFLAGS  := -Wall -Wextra -pedantic -std=c11 -pthread -g
+TARGET  := cat
+SRC     := main.c
+OBJS    := $(SRC:.c=.o)
+
+.PHONY: all clean valgrind
+
+all: $(TARGET)
+
+$(TARGET): $(OBJS)
+	$(CC) $(CFLAGS) -o $@ $^
+
+%.o: %.c
+	$(CC) $(CFLAGS) -c $< -o $@
+
+clean:
+	rm -f $(TARGET) $(OBJS)
+

exercises/coreutils/cat/main.c

@@ -0,0 +1,36 @@
+#include <stddef.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#define BUFFER_SIZE 256
+
+int main(int argc, char *argv[])
+{
+	if (argc < 2) {
+		fprintf(stderr, "Usage: %s FILE...\n", argv[0]);
+		return EXIT_FAILURE;
+	}
+
+	for (int i = 1; i < argc; i++) {
+		FILE *fp = fopen(argv[i], "r");
+		if (fp == NULL) {
+			perror("fopen");
+			return EXIT_FAILURE;
+		}
+
+		// Read file and print on the stdout
+		size_t nread;
+		unsigned char buff[BUFFER_SIZE];
+		while ((nread = fread(buff, 1, sizeof(buff), fp)) > 0) {
+			fwrite(buff, 1, nread, stdout);
+		}
+
+		if (fclose(fp) != 0) {
+			perror("fclose");
+			return EXIT_FAILURE;
+		}
+	}
+
+	return EXIT_SUCCESS;
+}