diff options
Diffstat (limited to 'src/stdbuf.c')
| -rw-r--r-- | src/stdbuf.c | 20 |
1 files changed, 14 insertions, 6 deletions
diff --git a/src/stdbuf.c b/src/stdbuf.c index 38e9bee7c..2500c3001 100644 --- a/src/stdbuf.c +++ b/src/stdbuf.c @@ -248,12 +248,14 @@ set_LD_PRELOAD (void) } } -/* Populate environ with _STDBUF_I=$MODE _STDBUF_O=$MODE _STDBUF_E=$MODE */ +/* Populate environ with _STDBUF_I=$MODE _STDBUF_O=$MODE _STDBUF_E=$MODE. + Return TRUE if any environment variables set. */ -static void +static bool set_libstdbuf_options (void) { - unsigned int i; + bool env_set = false; + size_t i; for (i = 0; i < ARRAY_CARDINALITY (stdbuf); i++) { @@ -278,8 +280,12 @@ set_libstdbuf_options (void) _("failed to update the environment with %s"), quote (var)); } + + env_set = true; } } + + return env_set; } int @@ -346,9 +352,11 @@ main (int argc, char **argv) usage (EXIT_CANCELED); } - /* FIXME: Should we mandate at least one option? */ - - set_libstdbuf_options (); + if (! set_libstdbuf_options ()) + { + error (0, 0, _("you must specify a buffering mode option")); + usage (EXIT_CANCELED); + } /* Try to preload libstdbuf first from the same path as stdbuf is running from. */ |