Add proper error reports in write_random_seed, via the new 'nonfatal'

[sgt/putty] / unix / uxstore.c

diff --git a/unix/uxstore.c b/unix/uxstore.c
index e7b9c15..785e1e3 100644 (file)
--- a/unix/uxstore.c
+++ b/unix/uxstore.c
@@ -299,8 +299,10 @@ void *open_settings_r(const char *sessionname)
         char *value = strchr(line, '=');
         struct skeyval *kv;
 
-        if (!value)
+        if (!value) {
+            sfree(line);
             continue;
+        }
         *value++ = '\0';
         value[strcspn(value, "\r\n")] = '\0';   /* trim trailing NL */
 
@@ -317,7 +319,7 @@ void *open_settings_r(const char *sessionname)
     return ret;
 }
 
-char *read_setting_s(void *handle, const char *key, char *buffer, int buflen)
+char *read_setting_s(void *handle, const char *key)
 {
     tree234 *tree = (tree234 *)handle;
     const char *val;
@@ -333,11 +335,8 @@ char *read_setting_s(void *handle, const char *key, char *buffer, int buflen)
 
     if (!val)
        return NULL;
-    else {
-       strncpy(buffer, val, buflen);
-       buffer[buflen-1] = '\0';
-       return buffer;
-    }
+    else
+       return dupstr(val);
 }
 
 int read_setting_i(void *handle, const char *key, int defvalue)
@@ -360,7 +359,7 @@ int read_setting_i(void *handle, const char *key, int defvalue)
        return atoi(val);
 }
 
-int read_setting_fontspec(void *handle, const char *name, FontSpec *result)
+FontSpec *read_setting_fontspec(void *handle, const char *name)
 {
     /*
      * In GTK1-only PuTTY, we used to store font names simply as a
@@ -375,29 +374,41 @@ int read_setting_fontspec(void *handle, const char *name, FontSpec *result)
      * ("FontName").
      */
     char *suffname = dupcat(name, "Name", NULL);
-    if (read_setting_s(handle, suffname, result->name, sizeof(result->name))) {
+    char *tmp;
+
+    if ((tmp = read_setting_s(handle, suffname)) != NULL) {
+        FontSpec *fs = fontspec_new(tmp);
        sfree(suffname);
-       return TRUE;                   /* got new-style name */
+       sfree(tmp);
+       return fs;                     /* got new-style name */
     }
     sfree(suffname);
 
     /* Fall back to old-style name. */
-    memcpy(result->name, "server:", 7);
-    if (!read_setting_s(handle, name,
-                       result->name + 7, sizeof(result->name) - 7) ||
-       !result->name[7]) {
-       result->name[0] = '\0';
-       return FALSE;
+    tmp = read_setting_s(handle, name);
+    if (tmp && *tmp) {
+        char *tmp2 = dupcat("server:", tmp, NULL);
+        FontSpec *fs = fontspec_new(tmp2);
+       sfree(tmp2);
+       sfree(tmp);
+       return fs;
     } else {
-       return TRUE;
+       sfree(tmp);
+       return NULL;
     }
 }
-int read_setting_filename(void *handle, const char *name, Filename *result)
+Filename *read_setting_filename(void *handle, const char *name)
 {
-    return !!read_setting_s(handle, name, result->path, sizeof(result->path));
+    char *tmp = read_setting_s(handle, name);
+    if (tmp) {
+        Filename *ret = filename_from_str(tmp);
+       sfree(tmp);
+       return ret;
+    } else
+       return NULL;
 }
 
-void write_setting_fontspec(void *handle, const char *name, FontSpec result)
+void write_setting_fontspec(void *handle, const char *name, FontSpec *fs)
 {
     /*
      * read_setting_fontspec had to handle two cases, but when
@@ -405,12 +416,12 @@ void write_setting_fontspec(void *handle, const char *name, FontSpec result)
      * new-style name.
      */
     char *suffname = dupcat(name, "Name", NULL);
-    write_setting_s(handle, suffname, result.name);
+    write_setting_s(handle, suffname, fs->name);
     sfree(suffname);
 }
-void write_setting_filename(void *handle, const char *name, Filename result)
+void write_setting_filename(void *handle, const char *name, Filename *result)
 {
-    write_setting_s(handle, name, result.path);
+    write_setting_s(handle, name, result->path);
 }
 
 void close_settings_r(void *handle)
@@ -580,9 +591,6 @@ void store_host_key(const char *hostname, int port,
     int headerlen;
     char *filename, *tmpfilename;
 
-    newtext = dupprintf("%s@%d:%s %s\n", keytype, port, hostname, key);
-    headerlen = 1 + strcspn(newtext, " ");   /* count the space too */
-
     /*
      * Open both the old file and a new file.
      */
@@ -604,6 +612,9 @@ void store_host_key(const char *hostname, int port,
     filename = make_filename(INDEX_HOSTKEYS, NULL);
     rfp = fopen(filename, "r");
 
+    newtext = dupprintf("%s@%d:%s %s\n", keytype, port, hostname, key);
+    headerlen = 1 + strcspn(newtext, " ");   /* count the space too */
+
     /*
      * Copy all lines from the old file to the new one that _don't_
      * involve the same host key identifier as the one we're adding.
@@ -612,6 +623,7 @@ void store_host_key(const char *hostname, int port,
         while ( (line = fgetline(rfp)) ) {
             if (strncmp(line, newtext, headerlen))
                 fputs(line, wfp);
+            sfree(line);
         }
         fclose(rfp);
     }
@@ -660,18 +672,45 @@ void write_random_seed(void *data, int len)
      */
     fd = open(fname, O_CREAT | O_WRONLY, 0600);
     if (fd < 0) {
+        if (errno != ENOENT) {
+            char *msg = dupprintf("Unable to write random seed: open(\"%s\") "
+                                  "returned '%s'", fname, strerror(errno));
+            nonfatal(msg);
+            sfree(msg);
+            return;
+        }
        char *dir;
 
        dir = make_filename(INDEX_DIR, NULL);
-       mkdir(dir, 0700);
+       if (mkdir(dir, 0700) < 0) {
+            char *msg = dupprintf("Unable to write random seed: mkdir(\"%s\") "
+                                  "returned '%s'", dir, strerror(errno));
+            nonfatal(msg);
+            sfree(msg);
+            sfree(dir);
+            return;
+        }
        sfree(dir);
 
        fd = open(fname, O_CREAT | O_WRONLY, 0600);
+        if (errno != ENOENT) {
+            char *msg = dupprintf("Unable to write random seed: open(\"%s\") "
+                                  "returned '%s'", fname, strerror(errno));
+            nonfatal(msg);
+            sfree(msg);
+            return;
+        }
     }
 
     while (len > 0) {
        int ret = write(fd, data, len);
-       if (ret <= 0) break;
+       if (ret < 0) {
+            char *msg = dupprintf("Unable to write random seed: write "
+                                  "returned '%s'", strerror(errno));
+            nonfatal(msg);
+            sfree(msg);
+            break;
+        }
        len -= ret;
        data = (char *)data + len;
     }