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git-svn-id: http://svn.code.sf.net/p/netpbm/code/trunk@2756 9d0c8265-081b-0410-96cb-a4ca84ce46f8

1 files changed, 4 insertions, 1 deletions

diff --git a/lib/libsystem.c b/lib/libsystem.c
index 77f874cb..80f51256 100644
--- a/lib/libsystem.c
+++ b/lib/libsystem.c
@@ -456,8 +456,11 @@ pm_system_lp(const char *    const progName,
              void *          const accepterParm,
              ...) {
 /*----------------------------------------------------------------------------
-  same as pm_system_vp() except with arguments as variable arguments
+  Same as pm_system_vp() except with arguments as variable arguments
   instead of an array.
+
+  N.B. the first variable argument is the program's arg 0; the last
+  variable argument must be NULL.
 -----------------------------------------------------------------------------*/
     va_list args;
     bool endOfArgs;