From 0940e27cb8dc9829130e141c599efee780cc4d67 Mon Sep 17 00:00:00 2001
From: Niklas Halle <niklas@niklashalle.net>
Date: Mon, 8 Jun 2020 10:52:06 +0200
Subject: stuff works, i think

---
 03_exercise/srv/shell.c | 79 ++++++++++++++++++++++++++++++++++++++++++++-----
 1 file changed, 71 insertions(+), 8 deletions(-)

(limited to '03_exercise/srv')

diff --git a/03_exercise/srv/shell.c b/03_exercise/srv/shell.c
index 5d7d33d..7a90945 100644
--- a/03_exercise/srv/shell.c
+++ b/03_exercise/srv/shell.c
@@ -18,13 +18,13 @@ char *get_current_dir_name(void);
 
 process *processes;
 
-int write_all(int sock, char *buffer, int size) {
+int write_all(int target_sock, char *buffer, size_t size) {
     int nwrite, sent = 0;
 
     while (sent < size) {
-        if ((nwrite = write(sock, buffer + sent, size - sent)) < 0) {
+        if ((nwrite = write(target_sock, buffer + sent, size - sent)) < 0) {
             perror("Write");
-            exit(1);
+            return -1;
         }
 
         sent += nwrite;
@@ -54,11 +54,60 @@ void receive_file(int sock, char *path, int size) {
     }
 
     if (write_all(file_fd, buffer, strlen(buffer) + 1) == strlen(buffer) + 1) {
-        printf("successfully wrote to remote file \"%s/%s\"\n", get_current_dir_name(), path);
+        printf("successfully wrote to remote file \"%s/%s\"", get_current_dir_name(), path);
+        printf("\n");
+    } else {
+        printf("error writing remote file \"%s/%s\"", get_current_dir_name(), path);
+        printf("\n");
     }
+
     close(file_fd);
 }
 
+void send_file(int client_fd, char *path) {
+    printf("Trying to get \"%s\" from remote...\n", path);
+    char buffer[BUF_SIZE];
+    memset(buffer, 0, BUF_SIZE);
+    int tmp_fd, file_fd;
+
+    if ((tmp_fd = open(path, O_RDONLY)) == -1) {
+        perror("Open");
+        return;
+    }
+    FILE *file = fdopen(tmp_fd, "r");
+    fseek(file, 0L, SEEK_END);
+    long int sz = ftell(file);
+    fseek(file, 0L, SEEK_SET);
+    fclose(file);
+    close(tmp_fd);
+    if ((file_fd = open(path, O_RDONLY)) == -1) {
+        perror("Open");
+        return;
+    }
+
+    int  length = snprintf(NULL, 0, "%ld", sz);
+    sprintf(buffer, "<<!%ld!", sz);
+    sprintf(&(buffer[3 + length + 1]), "%s\n", path);
+
+    write(client_fd, buffer, strlen(buffer));
+
+    usleep(150);
+
+    memset(buffer, 0, BUF_SIZE);
+
+    errno = 0;
+    while (read(file_fd, buffer, sizeof(buffer)) > 0) {
+        /*printf("Sent %i bytes\n", */write_all(client_fd, buffer, strlen(buffer) + 1)/*)*/;
+    }
+
+    if (errno)
+        perror("wad");
+
+    close(file_fd);
+
+    //printf("done.\n");
+}
+
 void signal_handler(int signal) {
     if (signal == SIGINT) {
         for (size_t i = 0; i < arrayLen(processes); ++i) {
@@ -121,8 +170,9 @@ int shell(int in_fd) {
            "fg: `fg pid` - pulls a process from the background back in the foreground\n"
            "\n"
            "You can put processes in the background using `&`\n"
-           "And with `|` you can pipe the output from one process to the input of another\n"
+           "And with `|` you can pipe the output from one process to the input of another"
     );
+    printf("\n$> ");
 
     char const *const original_wd = get_current_dir_name();
     //char const *prompt = relative_path(original_wd, original_wd);
@@ -158,6 +208,7 @@ int shell(int in_fd) {
         if (strcmp(processes[0].argv[0], "cd") == 0) {
             if (arrayLen(processes) != 1) {
                 perror("Can't chain cd with other processes");
+                printf("\n");
             }
             int ret;
             switch (arrayLen(processes[0].argv)) {
@@ -168,18 +219,28 @@ int shell(int in_fd) {
                     ret = chdir(original_wd);
                     break;
                 default:
-                    fprintf(stderr, "usage: cd <path>\n");
+                    fprintf(stderr, "usage: cd <path>");
+                    fprintf(stderr, "\n");
                     fflush(stderr);
                     ret = -1;
             }
 
             if (ret)
                 printf("[%i] ", ret);
-            else
-                printf("%s\n", get_current_dir_name());
+            else {
+                printf("%s", get_current_dir_name());
+                printf("\n");
+            }
 
         } else if (strcmp(processes[0].argv[0], "exit") == 0) {
             done = true;
+        } else if (strcmp(processes[0].argv[0], "get") == 0) {
+            if (arrayLen(processes[0].argv) != 3) {
+                printf("please provide a file name to get!");
+                printf("\n");
+            } else {
+                send_file(in_fd, processes[0].argv[1]);
+            }
         } else if (strcmp(processes[0].argv[0], "wait") == 0) {
             builtin_wait(processes[0], false);
         } else if (strcmp(processes[0].argv[0], "fg") == 0) {
@@ -194,12 +255,14 @@ int shell(int in_fd) {
                 /*if (ret)
                     printf("[%i] ", ret);*/
             }
+            printf("\n");
         }
 
         free_processes(&processes);
     }
 
     printf("Disconnecting...");
+    printf("\n");
 
     free((void *) original_wd);
 
-- 
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