file: Use 'long' to represent the parsed LOCK TIMEOUT value

Convert the StringToInt helper into a StringToLong helper with a 'long'
result type.  This will make the helper more useful to other callers
that want to use strtol.

While at it, also check errno after calling strtol in case the
conversion fails with a range error.

1 files changed, 2 insertions, 2 deletions

diff --git a/Source/cmFileLock.h b/Source/cmFileLock.h
index 4d922a0..dd959a7 100644
--- a/Source/cmFileLock.h
+++ b/Source/cmFileLock.h
@@ -37,7 +37,7 @@ class cmFileLock
     * @brief Lock the file.
     * @param timeoutSec Lock timeout. If -1 try until success or fatal error.
     */
-  cmFileLockResult Lock(const std::string& filename, unsigned timeoutSec);
+  cmFileLockResult Lock(const std::string& filename, unsigned long timeoutSec);
 
   /**
     * @brief Unlock the file.
@@ -57,7 +57,7 @@ class cmFileLock
 
   cmFileLockResult OpenFile();
   cmFileLockResult LockWithoutTimeout();
-  cmFileLockResult LockWithTimeout(unsigned timeoutSec);
+  cmFileLockResult LockWithTimeout(unsigned long timeoutSec);
 
 #if defined(_WIN32)
   typedef HANDLE FileId;