(unexpand): Save errno after input error, to report proper errno value.

diff --git a/src/unexpand.c b/src/unexpand.c
index 8ba563a..ab0b8fb 100644 (file)
--- a/src/unexpand.c
+++ b/src/unexpand.c
@@ -235,6 +235,7 @@ unexpand (void)
   int next_tab_column;         /* Column the next tab stop is on. */
   int convert = 1;             /* If nonzero, perform translations. */
   unsigned int pending = 0;    /* Pending columns of blanks. */
+  int saved_errno;
 
   fp = next_file ((FILE *) NULL);
   if (fp == NULL)
@@ -246,6 +247,7 @@ unexpand (void)
   for (;;)
     {
       c = getc (fp);
+      saved_errno = errno;
 
       if (c == ' ' && convert && column < TAB_STOP_SENTINEL)
        {
@@ -325,6 +327,7 @@ unexpand (void)
 
          if (c == EOF)
            {
+             errno = saved_errno;
              fp = next_file (fp);
              if (fp == NULL)
                break;          /* No more files. */