X-Git-Url: https://git.distorted.org.uk/~mdw/sgt/putty/blobdiff_plain/4a693cfc5c3ee0e639bbee0215345e921715ab04..7b56a33fca0f6c9130188db0d2eb475de9380b02:/logging.c

diff --git a/logging.c b/logging.c
index b2401c38..6252364c 100644
--- a/logging.c
+++ b/logging.c
@@ -16,13 +16,13 @@ struct LogContext {
     FILE *lgfp;
     enum { L_CLOSED, L_OPENING, L_OPEN, L_ERROR } state;
     bufchain queue;
-    Filename currlogfilename;
+    Filename *currlogfilename;
     void *frontend;
     Conf *conf;
     int logtype;		       /* cached out of conf */
 };
 
-static void xlatlognam(Filename *d, Filename s, char *hostname, struct tm *tm);
+static Filename *xlatlognam(Filename *s, char *hostname, struct tm *tm);
 
 /*
  * Internal wrapper function which must be called for _all_ output
@@ -116,7 +116,7 @@ static void logfopen_callback(void *handle, int mode)
 		       ctx->logtype == LGTYP_PACKETS ? "SSH packets" :
 		       ctx->logtype == LGTYP_SSHRAW ? "SSH raw data" :
 		       "unknown"),
-		      filename_to_str(&ctx->currlogfilename));
+		      filename_to_str(ctx->currlogfilename));
     logevent(ctx->frontend, event);
     sfree(event);
 
@@ -155,9 +155,11 @@ void logfopen(void *handle)
     tm = ltime();
 
     /* substitute special codes in file name */
-    xlatlognam(&ctx->currlogfilename,
-	       *conf_get_filename(ctx->conf, CONF_logfilename),
-	       conf_get_str(ctx->conf, CONF_host), &tm);
+    if (ctx->currlogfilename)
+        filename_free(ctx->currlogfilename);
+    ctx->currlogfilename = 
+        xlatlognam(conf_get_filename(ctx->conf, CONF_logfilename),
+                   conf_get_str(ctx->conf, CONF_host), &tm);
 
     ctx->lgfp = f_open(ctx->currlogfilename, "r", FALSE);  /* file already present? */
     if (ctx->lgfp) {
@@ -338,6 +340,7 @@ void *log_init(void *frontend, Conf *conf)
     ctx->frontend = frontend;
     ctx->conf = conf_copy(conf);
     ctx->logtype = conf_get_int(ctx->conf, CONF_logtype);
+    ctx->currlogfilename = NULL;
     bufchain_init(&ctx->queue);
     return ctx;
 }
@@ -348,6 +351,8 @@ void log_free(void *handle)
 
     logfclose(ctx);
     bufchain_clear(&ctx->queue);
+    if (ctx->currlogfilename)
+        filename_free(ctx->currlogfilename);
     sfree(ctx);
 }
 
@@ -356,8 +361,8 @@ void log_reconfig(void *handle, Conf *conf)
     struct LogContext *ctx = (struct LogContext *)handle;
     int reset_logging;
 
-    if (!filename_equal(*conf_get_filename(ctx->conf, CONF_logfilename),
-			*conf_get_filename(conf, CONF_logfilename)) ||
+    if (!filename_equal(conf_get_filename(ctx->conf, CONF_logfilename),
+			conf_get_filename(conf, CONF_logfilename)) ||
 	conf_get_int(ctx->conf, CONF_logtype) !=
 	conf_get_int(conf, CONF_logtype))
 	reset_logging = TRUE;
@@ -382,17 +387,19 @@ void log_reconfig(void *handle, Conf *conf)
  *
  * "&Y":YYYY   "&m":MM   "&d":DD   "&T":hhmmss   "&h":<hostname>   "&&":&
  */
-static void xlatlognam(Filename *dest, Filename src,
-		       char *hostname, struct tm *tm) {
+static Filename *xlatlognam(Filename *src, char *hostname, struct tm *tm)
+{
     char buf[10], *bufp;
     int size;
-    char buffer[FILENAME_MAX];
-    int len = sizeof(buffer)-1;
-    char *d;
+    char *buffer;
+    int buflen, bufsize;
     const char *s;
+    Filename *ret;
 
-    d = buffer;
-    s = filename_to_str(&src);
+    bufsize = FILENAME_MAX;
+    buffer = snewn(bufsize, char);
+    buflen = 0;
+    s = filename_to_str(src);
 
     while (*s) {
 	/* Let (bufp, len) be the string to append. */
@@ -428,13 +435,16 @@ static void xlatlognam(Filename *dest, Filename src,
 	    buf[0] = *s++;
 	    size = 1;
 	}
-	if (size > len)
-	    size = len;
-	memcpy(d, bufp, size);
-	d += size;
-	len -= size;
+        if (bufsize <= buflen + size) {
+            bufsize = (buflen + size) * 5 / 4 + 512;
+            buffer = sresize(buffer, bufsize, char);
+        }
+	memcpy(buffer + buflen, bufp, size);
+	buflen += size;
     }
-    *d = '\0';
+    buffer[buflen] = '\0';
 
-    *dest = filename_from_str(buffer);
+    ret = filename_from_str(buffer);
+    sfree(buffer);
+    return ret;
 }