Moved back to 02_exercise

12 files changed, 0 insertions, 443 deletions

diff --git a/shell/beispiele/dup/Makefile b/shell/beispiele/dup/Makefile
deleted file mode 100644
index 0f73ac4..0000000
--- a/shell/beispiele/dup/Makefile
+++ /dev/null
@@ -1,18 +0,0 @@
-#!/usr/bin/make
-.SUFFIXES:
-
-CFLAGS = -c -Os -Wall -Werror
-
-%.o: %.c
-	$(CC) $(CFLAGS) $^ -o $@
-
-%: %.o
-	$(CC) -o $@ $^
-
-all: dup
-
-run: all
-	./dup
-
-clean:
-	$(RM) $(RMFILES) dup
diff --git a/shell/beispiele/dup/dup.c b/shell/beispiele/dup/dup.c
deleted file mode 100644
index ea3c5a6..0000000
--- a/shell/beispiele/dup/dup.c
+++ /dev/null
@@ -1,51 +0,0 @@
-#include <stdio.h>
-#include <stdlib.h>
-#include <unistd.h>
-
-/* https://www.youtube.com/watch?v=gaXigSu72A4 */
-static inline void die(const char* msg) {
-	perror(msg);
-	exit(EXIT_FAILURE);
-}
-
-int main(int argc, char **argv) {
-	int pdes[2];
-	pid_t child;
- 	
-	if (pipe(pdes) < 0)
-		die("pipe()");
- 	
-	if ((child = fork()) < 0)
-		die("fork()");
- 	
-	if (child == 0) {
-		/* child process */
-      	close(pdes[0]);
-		close(1);       /* close stdout */
-		
-		if (dup(pdes[1]) < 0)
-			die("dup()");
-		
-		/* now stdout and pdes[1] are equivalent (dup returns lowest free descriptor) */
-		if (execlp("cat", "cat", "/etc/passwd", NULL) < 0)
-			die("execlp()");
-		
-		exit(EXIT_SUCCESS);
-	}
-	else {
-		/* parent process */
-		close(0);       /* close stdin */
-		close(pdes[1]);
-		
-		if (dup(pdes[0]) < 0)
-			die("dup()");
-		
-		/* now stdin and pdes[0] are equivalent (dup returns lowest free descriptor) */
-		if (execlp("wc", "wc", "-l", NULL) < 0)
-			die("execlp()");
-		
-		exit(EXIT_SUCCESS);
-	}
-	
-	return 0;
-}
diff --git a/shell/beispiele/fork_example/Makefile b/shell/beispiele/fork_example/Makefile
deleted file mode 100644
index 8f69ed9..0000000
--- a/shell/beispiele/fork_example/Makefile
+++ /dev/null
@@ -1,18 +0,0 @@
-#!/usr/bin/make
-.SUFFIXES:
-
-CFLAGS = -c -Os -Wall -Werror
-
-%.o: %.c
-	$(CC) $(CFLAGS) $^ -o $@
-
-%: %.o
-	$(CC) -o $@ $^
-
-all: fork
-
-run: all
-	./fork
-
-clean:
-	$(RM) $(RMFILES) fork
diff --git a/shell/beispiele/fork_example/fork.c b/shell/beispiele/fork_example/fork.c
deleted file mode 100644
index 7377b0f..0000000
--- a/shell/beispiele/fork_example/fork.c
+++ /dev/null
@@ -1,36 +0,0 @@
-#include <stdio.h>
-#include <stdlib.h>
-#include <unistd.h>
-#include <sys/wait.h>
-
-int main(void) {
-	pid_t proc_id;
-	int status = 0;
-	
-	proc_id = fork();
-	
-	if (proc_id < 0) {
-		fprintf(stderr, "fork error\n");
-		fflush(stderr);
-		return EXIT_FAILURE;
-	}
-	
-	if (proc_id == 0) {
-		/* child process */
-		printf("[child]  process id: %d\n", (int) getpid());
-		
-		char* args[] = {"sleep", "1", NULL};
-		execvp(args[0], args);
-		exit(-1);
-	}
-	else {
-		/* parent */
-		printf("[parent] process id: %d\n", (int) getpid());
-		pid_t child_id = wait(&status);
-		
-		printf("[parent] child %d returned: %d\n",
-		        child_id, WEXITSTATUS(status));
-	}
-	
-	return EXIT_SUCCESS;
-}
diff --git a/shell/beispiele/fork_signal/Makefile b/shell/beispiele/fork_signal/Makefile
deleted file mode 100644
index 499b8cb..0000000
--- a/shell/beispiele/fork_signal/Makefile
+++ /dev/null
@@ -1,19 +0,0 @@
-#!/usr/bin/make
-.SUFFIXES:
-
-CFLAGS = -c -O0
-
-%.o: %.c
-	$(CC) $(CFLAGS) $^ -o $@
-
-%: %.o
-	$(CC) -o $@ $^
-
-all: fork signal
-
-run: all
-	./fork 10
-	./signal
-
-clean:
-	$(RM) $(RMFILES) fork signal
diff --git a/shell/beispiele/fork_signal/fork.c b/shell/beispiele/fork_signal/fork.c
deleted file mode 100644
index b144577..0000000
--- a/shell/beispiele/fork_signal/fork.c
+++ /dev/null
@@ -1,39 +0,0 @@
-#include <stdio.h>
-#include <stdlib.h>
-#include <unistd.h>
-#include <sys/types.h>
-#include <sys/wait.h>
-
-int main(int argc, const char* argv[]) {
-	pid_t pid;
-	int h;
-	int count;
-	
-	if (argc < 2) {
-		printf("Usage: ./fork process#\n");
-		return 0;
-	}
-	
-	count = atoi(argv[1]) - 1;
-	printf("Process#: %d\n", count + 1);
-	printf("Parent started\n");
-	
-	pid = 1;
-	for (h = 0; h < count; ++h) {
-		if ((pid = fork()) < 0)
-			printf("fork error\n");
-		else if (pid == 0) {
-			printf("Child %d started\n", h);
-			sleep(1);
-			printf("Child %d finished\n", h);
-			exit(0);
-		}
-	}
-	
-	printf("Parent waiting\n");
-	for (h = 0; h < count; ++h) {
-		wait(NULL);
-	}
-	printf("Parent finished\n");
-	return EXIT_SUCCESS;
-}
diff --git a/shell/beispiele/fork_signal/signal.c b/shell/beispiele/fork_signal/signal.c
deleted file mode 100644
index 500d2e1..0000000
--- a/shell/beispiele/fork_signal/signal.c
+++ /dev/null
@@ -1,21 +0,0 @@
-#include <unistd.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <signal.h>
-
-void sig_handler(int signo) {
-	const char msg[] = "Speicherzugriffsfehler!\n";
-	write(2, msg, sizeof(msg) - 1);
-	exit(-1);
-}
-
-int main(void) {
-	if (signal(SIGSEGV, sig_handler) == SIG_ERR) {
-		perror("signal");
-		exit(-1);
-	}
-	
-	int array[1] = {0};
-	array[1000000] = 3;
-	return 0;
-}
diff --git a/shell/beispiele/pipe_bidirect/Makefile b/shell/beispiele/pipe_bidirect/Makefile
deleted file mode 100644
index 361ac97..0000000
--- a/shell/beispiele/pipe_bidirect/Makefile
+++ /dev/null
@@ -1,19 +0,0 @@
-#!/usr/bin/make
-.SUFFIXES:
-
-CFLAGS = -c -Os -Wall -Werror
-
-%.o: %.c
-	$(CC) $(CFLAGS) $^ -o $@
-
-%: %.o
-	$(CC) -o $@ $^
-
-all: pingpong
-
-run: all
-	@echo "writing into log.txt; stop execution with CTRL+C"
-	./pingpong
-
-clean:
-	$(RM) $(RMFILES) pingpong
diff --git a/shell/beispiele/pipe_bidirect/log.txt b/shell/beispiele/pipe_bidirect/log.txt
deleted file mode 100644
index c59b0bb..0000000
--- a/shell/beispiele/pipe_bidirect/log.txt
+++ /dev/null
@@ -1,19 +0,0 @@
-[3225581]: ping
-[3225580]: pong
-[3225581]: ping
-[3225580]: pong
-[3225581]: ping
-[3225580]: pong
-[3225581]: ping
-[3225580]: pong
-[3225581]: ping
-[3225580]: pong
-[3225581]: ping
-[3225580]: pong
-[3225581]: ping
-[3225580]: pong
-[3225581]: ping
-[3225580]: pong
-[3225581]: ping
-[3225580]: pong
-Programmabbruch durch Nutzer
diff --git a/shell/beispiele/pipe_bidirect/pingpong.c b/shell/beispiele/pipe_bidirect/pingpong.c
deleted file mode 100644
index f38394f..0000000
--- a/shell/beispiele/pipe_bidirect/pingpong.c
+++ /dev/null
@@ -1,125 +0,0 @@
-#include <fcntl.h>
-#include <signal.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <unistd.h>
-
-static int split(int fd[2]);
-static int redir(int fd, const char *file);
-static void sig_handler(int sig);
-
-static int parent;
-
-int main(void) {
-    ssize_t bytes;
-    char buf[256];
-    int fd[2];
-
-    // disable buffering for stdout
-    setvbuf(stdout, NULL, _IONBF, 0);
-
-    // redirect stdout to write into a file
-    if (redir(1, "log.txt") < 0) {
-        perror("redir()");
-        exit(-1);
-    }
-
-    // install the signal handler for Ctrl+C
-    if (signal(SIGINT, sig_handler) == SIG_ERR) {
-        perror("signal()");
-        exit(-1);
-    }
-
-    // split processes and assign file descriptors for communication
-    switch (split(fd)) {
-    case -1: // error
-        exit(-1);
-
-    case 0: // child
-        while ((bytes = read(fd[0], buf, sizeof(buf))) > 0) {
-            printf("[%u]: %s\n", getpid(), buf);
-            sleep(1);
-            write(fd[1], "pong", 5);
-        }
-        break;
-
-    case 1: // parent
-        parent = 1;
-        write(fd[1], "ping", 5);
-        while ((bytes = read(fd[0], buf, sizeof(buf))) > 0) {
-            printf("[%u]: %s\n", getpid(), buf);
-            sleep(1);
-            write(fd[1], "ping", 5);
-        }
-        break;
-    }
-
-    // close the file descriptors
-    close(fd[0]);
-    close(fd[1]);
-
-    return 0;
-}
-
-int split(int fd[2]) {
-    int pfd[2][2];
-
-    if (pipe(pfd[0]) < 0) {
-        perror("pipe()");
-        goto err_pipe1;
-    }
-
-    if (pipe(pfd[1]) < 0) {
-        perror("pipe()");
-        goto err_pipe2;
-    }
-
-    switch (fork()) {
-    case -1:
-        perror("fork()");
-        goto err_fork;
-
-    case 0:                // child process
-        close(pfd[0][1]);  // close write for child
-        close(pfd[1][0]);  // close read for parent
-        fd[0] = pfd[0][0]; // keep read for child
-        fd[1] = pfd[1][1]; // keep write for parent
-        return 0;
-
-    default:               // parent process
-        close(pfd[1][1]);  // close write for parent
-        close(pfd[0][0]);  // close read for child
-        fd[0] = pfd[1][0]; // keep read for parent
-        fd[1] = pfd[0][1]; // keep write for child
-        return 1;
-    }
-
-err_fork:
-    close(pfd[1][0]);
-    close(pfd[1][1]);
-err_pipe2:
-    close(pfd[0][0]);
-    close(pfd[0][1]);
-err_pipe1:
-    return -1;
-}
-
-int redir(int fd, const char *file) {
-    int fd2 = open(file, O_WRONLY | O_CREAT | O_TRUNC, 0644);
-
-    if (fd2 < 0)
-        return -1;
-
-    dup2(fd2, fd);
-    close(fd2);
-
-    return 0;
-}
-
-void sig_handler(int sig) {
-    if (parent) {
-        const char msg[] = "Programmabbruch durch Nutzer\n";
-        write(1, msg, sizeof(msg) - 1);
-    }
-    exit(0);
-}
diff --git a/shell/beispiele/pipe_example/Makefile b/shell/beispiele/pipe_example/Makefile
deleted file mode 100644
index d69473e..0000000
--- a/shell/beispiele/pipe_example/Makefile
+++ /dev/null
@@ -1,18 +0,0 @@
-#!/usr/bin/make
-.SUFFIXES:
-
-CFLAGS = -c -Os -Wall -Werror
-
-%.o: %.c
-	$(CC) $(CFLAGS) $^ -o $@
-
-%: %.o
-	$(CC) -o $@ $^
-
-all: pipe
-
-run: all
-	./pipe
-
-clean:
-	$(RM) $(RMFILES) pipe
diff --git a/shell/beispiele/pipe_example/pipe.c b/shell/beispiele/pipe_example/pipe.c
deleted file mode 100644
index 422e4d5..0000000
--- a/shell/beispiele/pipe_example/pipe.c
+++ /dev/null
@@ -1,60 +0,0 @@
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <unistd.h>
-
-#define BUF_SIZE 32
-
-int pipe_fds[2];
-
-void term(const char *msg) {
-	if (msg) {
-		fprintf(stderr, "Error: %s\n", msg);
-		fflush(stderr);
-	}
-	
-	int close_fail = 0;
-	int ret = close(pipe_fds[0]);
-	
-	if (ret < 0) {
-		fprintf(stderr, "Error: Couldn't close reading end of pipe\n");
-		fflush(stderr);
-		close_fail = 1;
-	}
-	
-	ret = close(pipe_fds[1]);
-	
-	if (ret < 0) {
-		fprintf(stderr, "Error: Couldn't close writing end of pipe\n");
-		fflush(stderr);
-		close_fail = 1;
-	}
-	
-	exit((msg || close_fail) ? EXIT_FAILURE : EXIT_SUCCESS);
-}
-
-int main(void) {
-	int ret = pipe(pipe_fds);
-
-	if (ret < 0)
-		term("Couldn't create pipe");
-
-	char out_buf[] = "hello";
-	ret = write(pipe_fds[1], out_buf, strlen(out_buf) + 1);
-
-	if (ret < 0)
-		term("Couldn't write to pipe");
-
-	printf("send msg: %s\n", out_buf);
-
-	char in_buf[BUF_SIZE];
-	memset(in_buf, 0, BUF_SIZE);
-
-	ret = read(pipe_fds[0], in_buf, BUF_SIZE - 1);
-
-	if (ret < 0)
-		term("Couldn't read from pipe");
-
-	printf("recv msg: %s\n", in_buf);
-	return 0;
-}