Makefile: silence some errors, clean up log

Makefile

@@ -1,15 +1,22 @@
 CC := gcc
 CFLAGS := -Wall -Wextra -O2
 
+# Silence some errors/warnings for now
+CFLAGS += -Wno-implicit-fallthrough
+CFLAGS += -Wno-strict-aliasing
+CFLAGS += -Wno-uninitialized
+
 SRC := $(wildcard *.c)
 OBJ := $(SRC:.c=.o)
 ELF := $(SRC:.c=.elf)
 
 %.o: %.c
-	$(CC) $(CFLAGS) -c -o $@ $<
+	@echo CC $@
+	@$(CC) $(CFLAGS) -c -o $@ $<
 
 %.elf: %.o
-	$(CC) $(LIBS) -o $@ $<
+	@echo LD $@
+	@$(CC) $(LIBS) -o $@ $<
 
 all: $(ELF)
 
@@ -23,6 +30,7 @@ format:
 	clang-format -i $(shell git ls-files '*.c' '*.h')
 
 clean:
-	rm -rf $(OBJ) $(ELF) *.json .cache
+	@echo "Cleaning up..."
+	@rm -rf $(OBJ) $(ELF) *.json .cache
 
 .PHONY: format

file_allocate.c

@@ -0,0 +1,67 @@
+#define _GNU_SOURCE /* Required for linux fallocate */
+#include <fcntl.h>
+#include <linux/falloc.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+int posix_falloc(void);
+int file_trunc(void);
+int linux_falloc(void);
+
+#define FILENAME "allocated.bin"
+
+int main(void) {
+    posix_falloc();
+    file_trunc();
+    linux_falloc();
+
+    return EXIT_SUCCESS;
+}
+
+int posix_falloc(void) {
+    int fd = open(FILENAME, O_CREAT | O_WRONLY, 0666);
+    if (fd == -1) {
+        return EXIT_FAILURE;
+    }
+
+    off_t length = 1024 * 1024; // 1 MB
+    int   ret = posix_fallocate(fd, 0, length);
+    if (ret != 0) {
+        return EXIT_FAILURE;
+    }
+
+    close(fd);
+    remove(FILENAME);
+    return EXIT_SUCCESS;
+}
+
+int linux_falloc(void) {
+    int fd = open(FILENAME, O_CREAT | O_WRONLY, 0666);
+    if (fd == -1) {
+        perror("Error");
+        return EXIT_FAILURE;
+    }
+
+    off_t length = 1024 * 1024; // 1 MB
+    if (fallocate(fd, 0, 0, length) == -1) {
+        perror("fallocate");
+        return EXIT_FAILURE;
+    }
+
+    close(fd);
+    remove(FILENAME);
+    return EXIT_SUCCESS;
+}
+
+int file_trunc(void) {
+    int fd = open(FILENAME, O_CREAT | O_WRONLY, 0666);
+    if (fd == -1) {
+        perror("Error");
+        return EXIT_FAILURE;
+    }
+    off_t length = 1024 * 1024; // 1 MB
+    ftruncate(fd, length);
+    remove(FILENAME);
+    return EXIT_SUCCESS;
+}