Fix pcregrep recursive file name issue.

git-svn-id: svn:https://vcs.exim.org/pcre/code/trunk@1712 2f5784b3-3f2a-0410-8824-cb99058d5e15

ChangeLog

@@ -11,6 +11,11 @@ Version 8.42 xx-xxx-2017
 
 2. Fixed outdated real_pcre definitions in pcre.h.in (patch by Evgeny Kotkov).
 
+3. pcregrep was truncating components of file names to 128 characters when
+processing files with the -r option, and also (some very odd code) truncating
+path names to 512 characters. There is now a check on the absolute length of
+full path file names, which may be up to 2047 characters long.
+
 
 Version 8.41 05-July-2017
 -------------------------

pcregrep.c

@@ -2234,7 +2234,7 @@ if (isdirectory(pathname))
 
  if (dee_action == dee_RECURSE)
  {
- char buffer[1024];
+ char buffer[2048];
  char *nextfile;
  directory_type *dir = opendirectory(pathname);
 
@@ -2249,7 +2249,13 @@ if (isdirectory(pathname))
  while ((nextfile = readdirectory(dir)) != NULL)
  {
  int frc;
- sprintf(buffer, "%.512s%c%.128s", pathname, FILESEP, nextfile);
+ int fnlength = strlen(pathname) + strlen(nextfile) + 2;
+ if (fnlength > 2048)
+ {
+ fprintf(stderr, "pcre2grep: recursive filename is too long\n");
+ return 2; 
+ } 
+ sprintf(buffer, "%s%c%s", pathname, FILESEP, nextfile);
  frc = grep_or_recurse(buffer, dir_recurse, FALSE);
  if (frc > 1) rc = frc;
  else if (frc == 0 && rc == 1) rc = 0;