diff options
Diffstat (limited to 'libgfortran/io/file_pos.c')
| -rw-r--r-- | libgfortran/io/file_pos.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/libgfortran/io/file_pos.c b/libgfortran/io/file_pos.c index d9ac1e7f7ed..ba8f6317221 100644 --- a/libgfortran/io/file_pos.c +++ b/libgfortran/io/file_pos.c @@ -120,7 +120,9 @@ unformatted_backspace (st_parameter_filepos *fpp, gfc_unit *u) else reverse_memcpy (&m, p, sizeof (gfc_offset)); - new = file_position (u->s) - m - 2*length; + if ((new = file_position (u->s) - m - 2*length) < 0) + new = 0; + if (sseek (u->s, new) == FAILURE) goto io_error; @@ -179,6 +181,7 @@ st_backspace (st_parameter_filepos *fpp) u->endfile = NO_ENDFILE; u->current_record = 0; + u->bytes_left = 0; } done: |