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From 5d79a5c944d05f71425d3156597a2a61c5f2ab9a Mon Sep 17 00:00:00 2001
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From: Ming-Hung Tsai <mtsai@redhat.com>
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Date: Wed, 2 Jun 2021 13:08:47 +0800
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Subject: [PATCH 08/10] [thin_dump] Fix warnings on potential NULL pointer
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---
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base/application.cc | 8 +++++++-
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base/application.h | 2 +-
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thin-provisioning/thin_dump.cc | 16 ++--------------
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3 files changed, 10 insertions(+), 16 deletions(-)
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diff --git a/base/application.cc b/base/application.cc
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index 61338ff..dbd55a5 100644
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--- a/base/application.cc
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+++ b/base/application.cc
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@@ -25,8 +25,14 @@ command::die(string const &msg)
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}
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::uint64_t
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-command::parse_uint64(string const &str, string const &desc)
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+command::parse_uint64(char const *str, char const *desc)
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{
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+ if (!str) {
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+ ostringstream out;
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+ out << "Couldn't parse " << desc << ": NULL";
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+ die(out.str());
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+ }
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+
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try {
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// FIXME: check trailing garbage is handled
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return lexical_cast<::uint64_t>(str);
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diff --git a/base/application.h b/base/application.h
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index b799eaf..f071533 100644
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--- a/base/application.h
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+++ b/base/application.h
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@@ -19,7 +19,7 @@ namespace base {
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virtual ~command() {}
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void die(std::string const &msg;;
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- uint64_t parse_uint64(std::string const &str, std::string const &desc);
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+ uint64_t parse_uint64(char const *str, char const *desc);
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virtual void usage(std::ostream &out) const = 0;
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diff --git a/thin-provisioning/thin_dump.cc b/thin-provisioning/thin_dump.cc
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index 74cfa91..c0e73e6 100644
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--- a/thin-provisioning/thin_dump.cc
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+++ b/thin-provisioning/thin_dump.cc
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@@ -143,7 +143,6 @@ thin_dump_cmd::run(int argc, char **argv)
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int c;
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char const *output = NULL;
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const char shortopts[] = "hm::o:f:rV";
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- char *end_ptr;
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block_address metadata_snap = 0;
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::uint64_t dev_id;
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struct flags flags;
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@@ -181,13 +180,7 @@ thin_dump_cmd::run(int argc, char **argv)
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flags.use_metadata_snap = true;
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if (optarg) {
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// FIXME: deprecate this option
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- metadata_snap = strtoull(optarg, &end_ptr, 10);
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- if (end_ptr == optarg) {
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- cerr << "couldn't parse <metadata-snap>" << endl;
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- usage(cerr);
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- return 1;
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- }
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-
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+ metadata_snap = parse_uint64(optarg, "metadata-snap");
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flags.snap_location = metadata_snap;
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}
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break;
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@@ -197,12 +190,7 @@ thin_dump_cmd::run(int argc, char **argv)
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break;
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case 1:
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- dev_id = strtoull(optarg, &end_ptr, 10);
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- if (end_ptr == optarg) {
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- cerr << "couldn't parse <dev-id>\n";
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- usage(cerr);
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- return 1;
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- }
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+ dev_id = parse_uint64(optarg, "dev-id");
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flags.opts.select_dev(dev_id);
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break;
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--
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1.8.3.1
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