From 4229c625bfb7751532f5705774c4544276b088a1 Mon Sep 17 00:00:00 2001
From: elvis <elvilio98@gmail.com>
Date: Wed, 20 Apr 2022 18:25:55 +0200
Subject: [PATCH] Fixed bug in serverworker, added -w directory traversal

---
 src/client.c       | 111 ++++++++++++++++++++++++++++++++++++---------
 src/serverWorker.c |   1 -
 2 files changed, 89 insertions(+), 23 deletions(-)

diff --git a/src/client.c b/src/client.c
index 2be4b31..8d0336b 100644
--- a/src/client.c
+++ b/src/client.c
@@ -1,15 +1,17 @@
+#include <ctype.h>
+#include <errno.h>
+#include <fts.h>
 #include <signal.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
-#include <unistd.h>
-#include <errno.h>
-#include <time.h>
-#include <sys/types.h>
 #include <sys/stat.h>
-#include <fts.h>
+#include <sys/types.h>
+#include <time.h>
+#include <unistd.h>
 
 #include <api.h>
+#include <strsep_gnu.h>
 
 #define UNIX_PATH_MAX 256
 #define MAXARGLENGTH 256
@@ -25,14 +27,6 @@ typedef struct cmd_s {
     struct cmd_s *next;  // puntatore al prossimo comando nella lista
 } cmd_t;
 
-// struttura dati per il comando -w
-typedef struct cmdw_s {
-    char *dir;
-    int print;
-    int tot;
-    int curn;
-} cmdw_t;
-
 // -----------------------------------------------------------------------------
 // helper functions
 
@@ -87,6 +81,12 @@ int cmd_u(char *filelist, int print);
 // -c
 int cmd_c(char *filelist, int print);
 
+// compare files
+int compare(const FTSENT ** first, const FTSENT ** second) {
+    return (strcmp((*first)->fts_name, (*second)->fts_name));
+}
+
+
 // -----------------------------------------------------------------------------
 // MAIN
 int main(int argc, char* argv[]) {
@@ -110,8 +110,6 @@ int main(int argc, char* argv[]) {
     // lista dei comandi
     cmd_t *cmds = NULL;
     cmds = calloc(1, sizeof(cmd_t));
-    // struttra per -w
-    cmdw_t *cmdw = NULL;
 
     int opt = 0;
     char args[MAXARGLENGTH];
@@ -146,13 +144,6 @@ int main(int argc, char* argv[]) {
 		fprintf(stderr, "Il comando -w necessita di un argomento.\n");
 		goto _cleanup;
 	    }
-	    if(!cmdw) {
-		cmdw = calloc(1, sizeof(cmdw_t));
-		if(!cmdw) {
-		    perror("calloc");
-		    goto _cleanup;
-		}
-	    }
 	    memset(args, 0, MAXARGLENGTH);
 	    strncpy(args, optarg, strnlen(optarg, MAXARGLENGTH-1)+1);
 	    addCommand(&cmds, opt, args);
@@ -486,10 +477,86 @@ int cmd_w(char *dirname, char *Dir, int print) {
 	errno = EINVAL;
 	return -1;
     }
+    int num;
+
+    // we copy dirname because we are nice
+    char *tofree = malloc(strnlen(dirname, MAXARGLENGTH)+1);
+    if(!tofree) {
+	perror("malloc");
+	return -1;
+    }
+    strncpy(tofree, dirname, strnlen(dirname, MAXARGLENGTH));
+
+    char *firstArg;
+    char *secondArg = tofree;
+    firstArg = strsep_gnu(&secondArg, ","); // secondArg has the number of files
+
+    if (!secondArg) {
+	num = -1;
+    } else if (secondArg[0] == 'n' && secondArg[1] == '=') {
+	char *number = &secondArg[2];
+	for (int i = 0; i < strlen(number); ++i) {
+	    if (!isdigit(number[i])) {
+		free(tofree);
+		errno = EINVAL;
+		return -1;
+	    }
+	}
+	num = (int) strtol(number, NULL, 10);
+	num = (num==0)?-1:num;
+    } else {
+	free(tofree);
+	errno = EINVAL;
+	return -1;
+    }
+
+    if (print) {
+	printf("\nw - Scrivo i seguenti file sul server:");
+	fflush(stdout);
+    }
+
+    // we use fts to traverse all files in the directory recursively
+    FTS *fhandle = NULL;
+    FTSENT *child = NULL;
+    FTSENT *parent = NULL;
+
+    fhandle = fts_open(&firstArg, FTS_COMFOLLOW, &compare);
+
+    if(fhandle != NULL) {
+	// we check for num == 0 so that -1 yields all files in folder
+	while (num!=0 && (parent = fts_read(fhandle)) != NULL) {
+	    child = fts_children(fhandle, 0);
+
+	    while (num!=0 && (child != NULL)) { // for all children in folder
+		if(child->fts_info == FTS_F) { // if child is a file
+		    char *tmp = malloc(child->fts_namelen + child->fts_pathlen + 2);
+		    snprintf(tmp, child->fts_namelen + child->fts_pathlen + 2, "%s/%s", child->fts_path, child->fts_name);
+
+		    if(print) {
+			printf("%s\n", tmp);
+		    }
+
+		    // we send the file with the other function but set print to
+		    // 0 since we do the printing before
+		    cmd_W(tmp, Dir, 0);
+
+		    free(tmp);
+		    --num;
+		}
+		child = child->fts_link;
+	    }
+	}
+	fts_close(fhandle);
+    }
+    free(tofree);
     return 0;
 }
 
 int cmd_W(char *filelist, char *Dir, int print) {
+
+
+
+
     return 0;
 }
 
diff --git a/src/serverWorker.c b/src/serverWorker.c
index b071811..288f965 100644
--- a/src/serverWorker.c
+++ b/src/serverWorker.c
@@ -146,7 +146,6 @@ int parser(int len, char *command, queueT *queue, long fd_c, taglia_t* taglia, p
 	return -1;
     }
     strncpy(string, command, len-1); // strlcpy is only bsd :(
-    string[len-1] = '\0';
 
     char *token = NULL;
     char *token2 = NULL;