Make sure that we can't scan past the end of the format string.
[rsync/rsync.git] / log.c
diff --git a/log.c b/log.c
index b45fd8d..87cd1d7 100644 (file)
--- a/log.c
+++ b/log.c
@@ -32,6 +32,7 @@ extern int dry_run;
 extern int am_daemon;
 extern int am_server;
 extern int am_sender;
+extern int local_server;
 extern int quiet;
 extern int module_id;
 extern int msg_fd_out;
@@ -58,6 +59,7 @@ struct {
        { RERR_FILESELECT , "errors selecting input/output files, dirs" },
        { RERR_UNSUPPORTED, "requested action not supported" },
        { RERR_STARTCLIENT, "error starting client-server protocol" },
+       { RERR_LOG_FAILURE, "daemon unable to append to log-file" },
        { RERR_SOCKETIO   , "error in socket IO" },
        { RERR_FILEIO     , "error in file IO" },
        { RERR_STREAMIO   , "error in rsync protocol data stream" },
@@ -71,8 +73,9 @@ struct {
        { RERR_TIMEOUT    , "timeout in data send/receive" },
        { RERR_CMD_FAILED , "remote shell failed" },
        { RERR_CMD_KILLED , "remote shell killed" },
-       { RERR_CMD_RUN,     "remote command could not be run" },
-       { RERR_CMD_NOTFOUND, "remote command not found" },
+       { RERR_CMD_RUN    , "remote command could not be run" },
+       { RERR_CMD_NOTFOUND,"remote command not found" },
+       { RERR_DEL_LIMIT  , "the --max-delete limit stopped deletions" },
        { 0, NULL }
 };
 
@@ -155,7 +158,7 @@ void log_open(void)
                if (!logfile) {
                        am_daemon = 0; /* avoid trying to log again */
                        rsyserr(FERROR, errno, "fopen() of log-file failed");
-                       exit_cleanup(RERR_FILESELECT);
+                       exit_cleanup(RERR_LOG_FAILURE);
                }
        }
 }
@@ -349,44 +352,64 @@ static void log_formatted(enum logcode code, char *format, char *op,
                          struct file_struct *file, struct stats *initial_stats,
                          int iflags, char *hlink)
 {
-       char buf[MAXPATHLEN+1024];
-       char buf2[MAXPATHLEN];
-       char *p, *n;
+       char buf[MAXPATHLEN+1024], buf2[MAXPATHLEN], fmt[32];
+       char *p, *s, *n;
        size_t len, total;
        int64 b;
 
+       *fmt = '%';
+
        /* We expand % codes one by one in place in buf.  We don't
         * copy in the terminating nul of the inserted strings, but
         * rather keep going until we reach the nul of the format. */
        total = strlcpy(buf, format, sizeof buf);
        
        for (p = buf; (p = strchr(p, '%')) != NULL && p[1]; ) {
+               s = p++;
+               n = fmt + 1;
+               if (*p == '-')
+                       *n++ = *p++;
+               while (isdigit(*(uchar*)p) && n - fmt < (int)(sizeof fmt) - 8)
+                       *n++ = *p++;
+               if (!*p)
+                       break;
+               *n = '\0';
                n = NULL;
 
-               switch (p[1]) {
+               switch (*p++) {
                case 'h': if (am_daemon) n = client_name(0); break;
                case 'a': if (am_daemon) n = client_addr(0); break;
                case 'l':
-                       snprintf(buf2, sizeof buf2, "%.0f",
+                       strlcat(fmt, ".0f", sizeof fmt);
+                       snprintf(buf2, sizeof buf2, fmt,
                                 (double)file->length);
                        n = buf2;
                        break;
                case 'p':
-                       snprintf(buf2, sizeof buf2, "%d",
+                       strlcat(fmt, "d", sizeof fmt);
+                       snprintf(buf2, sizeof buf2, fmt,
                                 (int)getpid());
                        n = buf2;
                        break;
                case 'o': n = op; break;
                case 'f':
-                       pathjoin(buf2, sizeof buf2,
-                           am_sender && file->dir.root ? file->dir.root : "",
-                           safe_fname(f_name(file)));
-                       clean_fname(buf2, 0);
-                       n = buf2;
-                       if (*n == '/') n++;
+                       n = safe_fname(f_name(file));
+                       if (am_sender && file->dir.root) {
+                               pathjoin(buf2, sizeof buf2,
+                                        file->dir.root, n);
+                               /* The buffer from safe_fname() has more
+                                * room than MAXPATHLEN, so this is safe. */
+                               if (fmt[1])
+                                       strcpy(n, buf2);
+                               else
+                                       n = buf2;
+                       }
+                       clean_fname(n, 0);
+                       if (*n == '/')
+                               n++;
                        break;
                case 'n':
-                       n = (char*)safe_fname(f_name(file));
+                       n = safe_fname(f_name(file));
                        if (S_ISDIR(file->mode)) {
                                /* The buffer from safe_fname() has more
                                 * room than MAXPATHLEN, so this is safe. */
@@ -410,6 +433,7 @@ static void log_formatted(enum logcode code, char *format, char *op,
                case 'P': n = lp_path(module_id); break;
                case 'u': n = auth_user; break;
                case 'b':
+                       strlcat(fmt, ".0f", sizeof fmt);
                        if (am_sender) {
                                b = stats.total_written -
                                        initial_stats->total_written;
@@ -417,10 +441,11 @@ static void log_formatted(enum logcode code, char *format, char *op,
                                b = stats.total_read -
                                        initial_stats->total_read;
                        }
-                       snprintf(buf2, sizeof buf2, "%.0f", (double)b);
+                       snprintf(buf2, sizeof buf2, fmt, (double)b);
                        n = buf2;
                        break;
                case 'c':
+                       strlcat(fmt, ".0f", sizeof fmt);
                        if (!am_sender) {
                                b = stats.total_written -
                                        initial_stats->total_written;
@@ -428,17 +453,19 @@ static void log_formatted(enum logcode code, char *format, char *op,
                                b = stats.total_read -
                                        initial_stats->total_read;
                        }
-                       snprintf(buf2, sizeof buf2, "%.0f", (double)b);
+                       snprintf(buf2, sizeof buf2, fmt, (double)b);
                        n = buf2;
                        break;
                case 'i':
                        if (iflags & ITEM_DELETED) {
-                               n = "deleting";
+                               n = "*deleting";
                                break;
                        }
-                       n = buf2;
-                       n[0] = !(iflags & ITEM_UPDATING) ? '.'
-                            : *op == 's' ? '>' : '<';
+                       n = buf2 + MAXPATHLEN - 32;
+                       n[0] = iflags & ITEM_LOCAL_CHANGE
+                             ? iflags & ITEM_XNAME_FOLLOWS ? 'h' : 'c'
+                            : !(iflags & ITEM_TRANSFER) ? '.'
+                            : !local_server && *op == 's' ? '<' : '>';
                        n[1] = S_ISDIR(file->mode) ? 'd'
                             : IS_DEVICE(file->mode) ? 'D'
                             : S_ISLNK(file->mode) ? 'L' : 'f';
@@ -450,7 +477,7 @@ static void log_formatted(enum logcode code, char *format, char *op,
                        n[5] = !(iflags & ITEM_REPORT_PERMS) ? '.' : 'p';
                        n[6] = !(iflags & ITEM_REPORT_OWNER) ? '.' : 'o';
                        n[7] = !(iflags & ITEM_REPORT_GROUP) ? '.' : 'g';
-                       n[8] = '.';
+                       n[8] = !(iflags & ITEM_REPORT_XATTRS) ? '.' : 'a';
                        n[9] = '\0';
 
                        if (iflags & (ITEM_IS_NEW|ITEM_MISSING_DATA)) {
@@ -458,7 +485,7 @@ static void log_formatted(enum logcode code, char *format, char *op,
                                int i;
                                for (i = 2; n[i]; i++)
                                        n[i] = ch;
-                       } else if (!(iflags & ITEM_UPDATING)) {
+                       } else if (!(iflags & (ITEM_TRANSFER|ITEM_LOCAL_CHANGE))) {
                                int i;
                                for (i = 2; n[i]; i++) {
                                        if (n[i] != '.')
@@ -467,40 +494,42 @@ static void log_formatted(enum logcode code, char *format, char *op,
                                if (!n[i]) {
                                        for (i = 2; n[i]; i++)
                                                n[i] = ' ';
-                                       n[0] = '=';
                                }
                        }
                        break;
                }
 
-               /* n is the string to be inserted in place of this %
-                * code; len is its length not including the trailing
-                * NUL */
-               if (!n) {
-                       p += 2;
+               /* "n" is the string to be inserted in place of this % code. */
+               if (!n)
                        continue;
+               if (n != buf2 && fmt[1]) {
+                       strlcat(fmt, "s", sizeof fmt);
+                       snprintf(buf2, sizeof buf2, fmt, n);
+                       n = buf2;
                }
-
                len = strlen(n);
 
-               if (len + total - 2 >= sizeof buf) {
+               /* Subtract the length of the escape from the string's size. */
+               total -= p - s;
+
+               if (len + total >= sizeof buf) {
                        rprintf(FERROR,
                                "buffer overflow expanding %%%c -- exiting\n",
-                               p[0]);
+                               p[-1]);
                        exit_cleanup(RERR_MESSAGEIO);
                }
 
                /* Shuffle the rest of the string along to make space for n */
-               if (len != 2)
-                       memmove(p + len, p + 2, total - (p + 2 - buf) + 1);
-               total += len - 2;
+               if (len != (size_t)(p - s))
+                       memmove(s + len, p, total - (s - buf) + 1);
+               total += len;
 
-               /* Insert the contents of string "n", but NOT its nul. */
+               /* Insert the contents of string "n", but NOT its null. */
                if (len)
-                       memcpy(p, n, len);
+                       memcpy(s, n, len);
 
                /* Skip over inserted string; continue looking */
-               p += len;
+               p = s + len;
        }
 
        rprintf(code, "%s\n", buf);
@@ -528,8 +557,8 @@ void maybe_log_item(struct file_struct *file, int iflags, int itemizing,
        if (am_server) {
                if (am_daemon && !dry_run && see_item)
                        log_item(file, &stats, iflags, buf);
-       } else if (see_item || iflags & ITEM_UPDATING || *buf
-           || (S_ISDIR(file->mode) && iflags & ITEM_REPORT_TIME))
+       } else if (see_item || iflags & ITEM_LOCAL_CHANGE || *buf
+           || (S_ISDIR(file->mode) && iflags & SIGNIFICANT_ITEM_FLAGS))
                log_item(file, &stats, iflags, buf);
 }
 
@@ -549,7 +578,7 @@ void log_delete(char *fname, int mode)
                        len++; /* directories include trailing null */
                send_msg(MSG_DELETED, fname, len);
        } else {
-               fmt = log_format_has_o_or_i ? log_format : "%i %n";
+               fmt = log_format_has_o_or_i ? log_format : "deleting %n";
                log_formatted(FCLIENT, fmt, "del.", &file, &stats,
                              ITEM_DELETED, NULL);
        }
@@ -557,7 +586,7 @@ void log_delete(char *fname, int mode)
        if (!am_daemon || dry_run || !lp_transfer_logging(module_id))
                return;
 
-       fmt = daemon_log_format_has_o_or_i ? lp_log_format(module_id) : "%i %n";
+       fmt = daemon_log_format_has_o_or_i ? lp_log_format(module_id) : "deleting %n";
        log_formatted(FLOG, fmt, "del.", &file, &stats, ITEM_DELETED, NULL);
 }