Aren/NetBSD
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Check argc, and add a message.

Browse Source
This commit is contained in:
maxv 2017-06-14 17:54:01 +00:00
parent 9d643d5f09
commit fb196e084a
1 changed files with 13 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

17
usr.bin/pmc/pmc.c
View File

@ -1,4 +1,4 @@
/* $NetBSD: pmc.c,v 1.23 2017/03/24 18:30:44 maxv Exp $ */ /* $NetBSD: pmc.c,v 1.24 2017/06/14 17:54:01 maxv Exp $ */
/* /*
* Copyright (c) 2017 The NetBSD Foundation, Inc. * Copyright (c) 2017 The NetBSD Foundation, Inc.
@ -66,7 +66,7 @@
#include <sys/cdefs.h> #include <sys/cdefs.h>
#ifndef lint #ifndef lint
__RCSID("$NetBSD: pmc.c,v 1.23 2017/03/24 18:30:44 maxv Exp $"); __RCSID("$NetBSD: pmc.c,v 1.24 2017/06/14 17:54:01 maxv Exp $");
#endif #endif
#include <inttypes.h> #include <inttypes.h>
@ -585,8 +585,17 @@ main(int argc, char **argv)
setprogname(argv[0]); setprogname(argv[0]);
argv += 1; argv += 1;
if (x86_pmc_info(&pmcinfo) < 0) if (argc < 2)
errx(EXIT_FAILURE, "PMC support not compiled into the kernel"); usage();
if (x86_pmc_info(&pmcinfo) < 0) {
if (errno == EPERM)
errx(EXIT_FAILURE,
"PMC operations require root privileges");
else
errx(EXIT_FAILURE,
"PMC support not compiled into the kernel");
}
if (pmcinfo.vers != 1) if (pmcinfo.vers != 1)
errx(EXIT_FAILURE, "Wrong PMC version"); errx(EXIT_FAILURE, "Wrong PMC version");
pmc_ncounters = pmcinfo.nctrs; pmc_ncounters = pmcinfo.nctrs;