feat: finished ex3 serie2

processus/serie2/ex3/.gitignore

+*.o
+mytop

processus/serie2/ex3/Makefile

+CC := clang
+CFLAGS := -g -pedantic -Wall -Wextra -std=c11
+LDFLAGS := -fsanitize=address -fsanitize=leak -fsanitize=undefined -lm -lpthread
+TARGET := mytop
+
+all: $(TARGET)
+
+$(TARGET): mytop.o
+	@printf "=================== Building executable ===================\n"
+	$(CC) $(CFLAGS) $^ -o $@ $(LDFLAGS)
+
+%.o: %.c
+	@printf "=================== Building sources ===================\n"
+	$(CC) $(CFLAGS) -c $<
+
+.PHONY: clean
+
+clean:
+	@printf "=================== Cleaning up... ===================\n"
+	rm -f *.o $(TARGET)
+
+.PHONY: rebuild
+
+rebuild: clean all

processus/serie2/ex3/mytop.c

+#include <libgen.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <sys/types.h>
+#include <sys/wait.h>
+#include <unistd.h>
+
+int main(void) {
+    int status;
+    pid_t pid = -1;
+    char *prog = "top";
+
+    pid = fork();
+    if (pid == 0) {
+        fprintf(stdout, "I'm the child (%d)\n", getpid());
+
+        int exit_code = system(prog);
+
+        if (exit_code == -1) {
+            perror("system");
+        }
+
+        exit(exit_code);
+    } else if (pid > 0) {
+        pid = wait(&status);
+
+        if (pid == -1) {
+            perror("wait");
+        }
+
+        if (WIFEXITED(status)) {
+            fprintf(stdout, "%s completed with exit code %d\n", prog,
+                    WEXITSTATUS(status));
+        }
+    } else {
+        perror("fork");
+    }
+
+    return EXIT_SUCCESS;
+}