[SP/P06] Solved most exercises

4 files changed, 80 insertions, 0 deletions

diff --git a/Year 3/System programming/Practice06/ex1.c b/Year 3/System programming/Practice06/ex1.c
new file mode 100644
index 0000000..bcb22d5
--- /dev/null
+++ b/Year 3/System programming/Practice06/ex1.c
@@ -0,0 +1,14 @@
+#include <unistd.h> // pipe
+#include <stdio.h>
+
+int main(int argc, char* argv[]) {
+	int filedes[2];
+	if (pipe(filedes) < 0) {
+		perror("pipe");
+		return 1;
+	}
+
+	close(filedes[1]);
+	char buf;
+	read(filedes[1], &buf, 1);
+}
diff --git a/Year 3/System programming/Practice06/ex2.c b/Year 3/System programming/Practice06/ex2.c
new file mode 100644
index 0000000..83749e1
--- /dev/null
+++ b/Year 3/System programming/Practice06/ex2.c
@@ -0,0 +1,14 @@
+#include <unistd.h> // pipe
+#include <stdio.h>
+
+int main(int argc, char* argv[]) {
+	int filedes[2];
+	if (pipe(filedes) < 0) {
+		perror("pipe");
+		return 1;
+	}
+
+	close(filedes[0]);
+	char buf = 'a';
+	write(filedes[1], &buf, 1);
+}
diff --git a/Year 3/System programming/Practice06/ex3.c b/Year 3/System programming/Practice06/ex3.c
new file mode 100644
index 0000000..a1ef2e2
--- /dev/null
+++ b/Year 3/System programming/Practice06/ex3.c
@@ -0,0 +1,16 @@
+#include <unistd.h> // pipe
+#include <stdio.h>
+
+int main(int argc, char* argv[]) {
+	int filedes[2];
+	if (pipe(filedes) < 0) {
+		perror("pipe");
+		return 1;
+	}
+
+	char buf = 'a';
+	write(filedes[0], &buf, 1);
+	char bufin;
+	read(filedes[1], &bufin, 1);
+	printf("%c\n", bufin);
+}
diff --git a/Year 3/System programming/Practice06/ex4.c b/Year 3/System programming/Practice06/ex4.c
new file mode 100644
index 0000000..c499cb3
--- /dev/null
+++ b/Year 3/System programming/Practice06/ex4.c
@@ -0,0 +1,36 @@
+#include <unistd.h> // pipe
+#include <stdio.h>
+#include <string.h>
+#include <sys/types.h>
+#include <sys/wait.h>
+
+int main(int argc, char* argv[]) {
+	int filedes[2];
+	if (pipe(filedes) < 0) {
+		perror("pipe");
+		return 1;
+	}
+
+	pid_t fpid = fork();
+	if (fpid == 0) {
+		close(filedes[1]);
+		char buf[1024];
+		int count = 2;
+		while (count < argc) {
+			read(filedes[0], buf, 1024);
+			if (buf[0] != '\0') {
+				printf("%s\n", buf);
+				count++;
+				// TODO: изчистване на buf
+			}
+		}
+	}
+	else {
+		close(filedes[0]);
+		for (int i = 1; i < argc; i++) {
+			write(filedes[1], argv[i], strlen(argv[i]));
+			sleep(1);
+		}
+		wait(NULL);
+	}
+}