From 525e151681ec93657f027645ff0d8e0d487d6abf Mon Sep 17 00:00:00 2001
From: Ulrich Sibiller <uli42@gmx.de>
Date: Wed, 3 Jan 2018 00:06:39 +0100
Subject: Error.c: replace strcpy/strcat by snprintf

---
 nx-X11/programs/Xserver/hw/nxagent/Display.c |  3 +--
 nx-X11/programs/Xserver/hw/nxagent/Error.c   | 31 +++++++++++-----------------
 2 files changed, 13 insertions(+), 21 deletions(-)

(limited to 'nx-X11/programs')

diff --git a/nx-X11/programs/Xserver/hw/nxagent/Display.c b/nx-X11/programs/Xserver/hw/nxagent/Display.c
index b78530e37..31efab8c3 100644
--- a/nx-X11/programs/Xserver/hw/nxagent/Display.c
+++ b/nx-X11/programs/Xserver/hw/nxagent/Display.c
@@ -1873,8 +1873,7 @@ static FILE *nxagentLookForIconFile(char *iconName, const char *permission,
     /* append slash and icon name */
     if (strlen(singlePath) + strlen(iconName) + 1 < sizeof(singlePath))
     {
-      strncat(singlePath, slash, 1);
-      strcat(singlePath, iconName);
+      snprintf(singlePath + strlen(singlePath), sizeof(singlePath), "%s%s", slash, iconName);
 
       if ((fptr = fopen(singlePath, permission)) != NULL)
       {
diff --git a/nx-X11/programs/Xserver/hw/nxagent/Error.c b/nx-X11/programs/Xserver/hw/nxagent/Error.c
index 4a80ec5ad..7420a8b3d 100644
--- a/nx-X11/programs/Xserver/hw/nxagent/Error.c
+++ b/nx-X11/programs/Xserver/hw/nxagent/Error.c
@@ -359,14 +359,14 @@ char *nxagentGetHomePath(void)
       #endif
     }
 
-    strncpy(nxagentHomeDir, homeEnv, DEFAULT_STRING_LENGTH - 1);
+    snprintf(nxagentHomeDir, DEFAULT_STRING_LENGTH, "%s", homeEnv);
 
     #ifdef TEST
     fprintf(stderr, "nxagentGetHomePath: Assuming NX user's home directory '%s'.\n", nxagentHomeDir);
     #endif
   }
 
-  homePath = (char*) malloc(strlen(nxagentHomeDir) + 1);
+  homePath = strdup(nxagentHomeDir);
 
   if (homePath == NULL)
   {
@@ -377,8 +377,6 @@ char *nxagentGetHomePath(void)
     return NULL;
   }
 
-  strcpy(homePath, nxagentHomeDir);
-
   return homePath;
 }
 
@@ -434,8 +432,7 @@ char *nxagentGetRootPath(void)
       fprintf(stderr, "nxagentGetRootPath: Assuming NX root directory in '%s'.\n", homeEnv);
       #endif
 
-      strcpy(nxagentRootDir, homeEnv);
-      strcat(nxagentRootDir, "/.nx");
+      snprintf(nxagentRootDir, DEFAULT_STRING_LENGTH, "%s/.nx", homeEnv);
 
       free(homeEnv);
 
@@ -468,17 +465,17 @@ char *nxagentGetRootPath(void)
         return NULL;
       }
 
-      strcpy(nxagentRootDir, rootEnv);
+      snprintf(nxagentRootDir, DEFAULT_STRING_LENGTH, "%s", rootEnv);
     }
 
     #ifdef TEST
     fprintf(stderr, "nxagentGetRootPath: Assuming NX root directory '%s'.\n",
                 nxagentRootDir);
     #endif
-        
+
   }
 
-  rootPath = malloc(strlen(nxagentRootDir) + 1);
+  rootPath = strdup(nxagentRootDir);
 
   if (rootPath == NULL)
   {
@@ -489,8 +486,6 @@ char *nxagentGetRootPath(void)
     return NULL;
   }
 
-  strcpy(rootPath, nxagentRootDir);
-
   return rootPath;
 }
 
@@ -527,9 +522,7 @@ char *nxagentGetSessionPath(void)
       return NULL;
     }
 
-    strcpy(nxagentSessionDir, rootPath);
-
-    free(rootPath);
+    snprintf(nxagentSessionDir, DEFAULT_STRING_LENGTH, "%s", rootPath);
 
     if (strlen(nxagentSessionDir) + strlen("/C-") + strlen(nxagentSessionId) > DEFAULT_STRING_LENGTH - 1)
     {
@@ -538,12 +531,14 @@ char *nxagentGetSessionPath(void)
                   nxagentSessionDir);
       #endif
 
+      free(rootPath);
+
       return NULL;
     }
 
-    strcat(nxagentSessionDir, "/C-");
+    snprintf(nxagentSessionDir, DEFAULT_STRING_LENGTH, "%s/C-%s", rootPath, nxagentSessionId);
 
-    strcat(nxagentSessionDir, nxagentSessionId);
+    free(rootPath);
 
     if ((stat(nxagentSessionDir, &dirStat) == -1) && (errno == ENOENT))
     {
@@ -605,9 +600,7 @@ void nxagentGetClientsPath()
       return;
     }
 
-    strcpy(nxagentClientsLogName, sessionPath);
-
-    strcat(nxagentClientsLogName, "/clients");
+    snprintf(nxagentClientsLogName, DEFAULT_STRING_LENGTH, "%s/clients", sessionPath);
 
     free(sessionPath);
   }
-- 
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