Write a simple UNIX cp clone

exercises/coreutils/cp/Makefile

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+CC      := gcc
+CFLAGS  := -Wall -Wextra -pedantic -std=c11 -pthread -g
+TARGET  := cp
+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/cp/main.c

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+#include <stddef.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+#define BUFFER_SIZE 4096
+
+int main(int argc, char *argv[])
+{
+	if (argc < 3) {
+		fprintf(stderr, "Usage: %s SRC DEST", argv[0]);
+		return EXIT_FAILURE;
+	}
+
+	const char *src = argv[1];
+	const char *dest = argv[2];
+
+	FILE *fp1 = fopen(src, "rb");
+	if (fp1 == NULL) {
+		perror("cannot open source file");
+		return EXIT_FAILURE;
+	}
+
+	FILE *fp2 = fopen(dest, "wb");
+	if (fp2 == NULL) {
+		perror("cannot open destination file");
+		fclose(fp1);
+		return EXIT_FAILURE;
+	}
+
+	size_t nread;
+	unsigned char buff[BUFFER_SIZE];
+	while ((nread = fread(buff, 1, sizeof(buff), fp1)) > 0) {
+		if (fwrite(buff, 1, nread, fp2) != nread) {
+			perror("fwrite");
+			fclose(fp1);
+			fclose(fp2);
+			return EXIT_FAILURE;
+		}
+	}
+
+	if (ferror(fp1)) {
+		perror("read error");
+		fclose(fp1);
+		fclose(fp2);
+		return EXIT_FAILURE;
+	}
+
+	if (fclose(fp1) != 0) {
+		perror("cannot close source file");
+		return EXIT_FAILURE;
+	}
+
+	if (fclose(fp2) != 0) {
+		perror("cannot close destination file");
+		return EXIT_FAILURE;
+	}
+
+	return EXIT_SUCCESS;
+}

exercises/coreutils/cp/test.txt

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+This a simple file for testing my clone cp program
+
+This a test
+This a test
+
+This a test
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+This a test
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+