Erik suggests that this makes it easier to grep for options, and with --help we're anyway printing usage information as expected, not as part of an error report. Reported-by: Erik Sjölund <erik.sjolund(a)gmail.com> Link: https://bugs.passt.top/show_bug.cgi?id=52 Signed-off-by: Stefano Brivio <sbrivio(a)redhat.com> --- conf.c | 4 +++- log.c | 8 +++++--- log.h | 1 + 3 files changed, 9 insertions(+), 4 deletions(-) diff --git a/conf.c b/conf.c index ffff235..9eb6992 100644 --- a/conf.c +++ b/conf.c @@ -1630,8 +1630,10 @@ void conf(struct ctx *c, int argc, char **argv) case 'U': /* Handle these later, once addresses are configured */ break; - case '?': case 'h': + log_to_stdout = 1; + /* Falls through */ + case '?': default: usage(argv[0]); break; diff --git a/log.c b/log.c index 3a3d101..63d7801 100644 --- a/log.c +++ b/log.c @@ -43,17 +43,19 @@ static char log_header[BUFSIZ]; /* File header, written back on cuts */ static time_t log_start; /* Start timestamp */ int log_trace; /* --trace mode enabled */ +int log_to_stdout; /* Print to stdout instead of stderr */ #define BEFORE_DAEMON (setlogmask(0) == LOG_MASK(LOG_EMERG)) #define logfn(name, level) \ void name(const char *format, ...) { \ + FILE *out = log_to_stdout ? stdout : stderr; \ struct timespec tp; \ va_list args; \ \ if (setlogmask(0) & LOG_MASK(LOG_DEBUG) && log_file == -1) { \ clock_gettime(CLOCK_REALTIME, &tp); \ - fprintf(stderr, "%lli.%04lli: ", \ + fprintf(out, "%lli.%04lli: ", \ (long long int)tp.tv_sec - log_start, \ (long long int)tp.tv_nsec / (100L * 1000)); \ } \ @@ -70,10 +72,10 @@ void name(const char *format, ...) { \ if ((setlogmask(0) & LOG_MASK(LOG_DEBUG) && log_file == -1) || \ (BEFORE_DAEMON && !(log_opt & LOG_PERROR))) { \ va_start(args, format); \ - (void)vfprintf(stderr, format, args); \ + (void)vfprintf(out, format, args); \ va_end(args); \ if (format[strlen(format)] != '\n') \ - fprintf(stderr, "\n"); \ + fprintf(out, "\n"); \ } \ } diff --git a/log.h b/log.h index 3aab29d..a17171a 100644 --- a/log.h +++ b/log.h @@ -22,6 +22,7 @@ void debug(const char *format, ...); } while (0) extern int log_trace; +extern int log_to_stdout; void trace_init(int enable); #define trace(...) \ do { \ -- 2.39.2