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Date: Thu, 2 Jan 2014 16:28:46 +0530
From: Ramkumar Ramachandra <artagnon@...il.com>
To: LKML <linux-kernel@...r.kernel.org>
Cc: David Ahern <dsahern@...il.com>,
Arnaldo Carvalho de Melo <acme@...hat.com>
Subject: [PATCH 1/5] perf kvm: introduce --list-cmds for use by scripts
Introduce
$ perf kvm --list-cmds
to dump a raw list of commands for use by the completion script. While
at it, refactor kvm_usage so that there's only one copy of the command
listing.
Cc: David Ahern <dsahern@...il.com>
Cc: Arnaldo Carvalho de Melo <acme@...hat.com>
Signed-off-by: Ramkumar Ramachandra <artagnon@...il.com>
---
tools/perf/builtin-kvm.c | 39 ++++++++++++++++++++++++++++++++++-----
tools/perf/perf-completion.sh | 2 +-
2 files changed, 35 insertions(+), 6 deletions(-)
diff --git a/tools/perf/builtin-kvm.c b/tools/perf/builtin-kvm.c
index 154b397..313b217 100644
--- a/tools/perf/builtin-kvm.c
+++ b/tools/perf/builtin-kvm.c
@@ -1669,9 +1669,33 @@ __cmd_buildid_list(const char *file_name, int argc, const char **argv)
return cmd_buildid_list(i, rec_argv, NULL);
}
+static void build_usage_string(const char **usage_str, const char *command,
+ const char *const *subcommands)
+{
+ struct strbuf buf = STRBUF_INIT;
+
+ strbuf_addf(&buf, "perf %s [<options>] {", command);
+ for (int i = 0; subcommands[i]; i++) {
+ if (i)
+ strbuf_addstr(&buf, "|");
+ strbuf_addstr(&buf, subcommands[i]);
+ }
+ strbuf_addstr(&buf, "}");
+
+ usage_str[0] = strdup(buf.buf);
+ strbuf_release(&buf);
+}
+
+static void list_cmds_raw(const char *const *subcommands)
+{
+ for (int i = 0; subcommands[i]; i++)
+ printf("%s ", subcommands[i]);
+}
+
int cmd_kvm(int argc, const char **argv, const char *prefix __maybe_unused)
{
const char *file_name = NULL;
+ bool list_cmds = false;
const struct option kvm_options[] = {
OPT_STRING('i', "input", &file_name, "file",
"Input file name"),
@@ -1692,20 +1716,25 @@ int cmd_kvm(int argc, const char **argv, const char *prefix __maybe_unused)
"file", "file saving guest os /proc/modules"),
OPT_INCR('v', "verbose", &verbose,
"be more verbose (show counter open errors, etc)"),
+ OPT_BOOLEAN(0, "list-cmds", &list_cmds,
+ "list commands raw for use by scripts"),
OPT_END()
};
-
- const char * const kvm_usage[] = {
- "perf kvm [<options>] {top|record|report|diff|buildid-list|stat}",
- NULL
- };
+ const char *const subcommands[] = { "top", "record", "report", "diff",
+ "buildid-list", "stat", NULL };
+ const char *kvm_usage[] = { NULL, NULL };
+ build_usage_string(kvm_usage, "kvm", subcommands);
perf_host = 0;
perf_guest = 1;
argc = parse_options(argc, argv, kvm_options, kvm_usage,
PARSE_OPT_STOP_AT_NON_OPTION);
+ if (list_cmds) {
+ list_cmds_raw(subcommands);
+ return 0;
+ }
if (!argc)
usage_with_options(kvm_usage, kvm_options);
diff --git a/tools/perf/perf-completion.sh b/tools/perf/perf-completion.sh
index 496e2ab..d8bfa43 100644
--- a/tools/perf/perf-completion.sh
+++ b/tools/perf/perf-completion.sh
@@ -123,7 +123,7 @@ __perf_main ()
__perfcomp_colon "$evts" "$cur"
# List subcommands for 'perf kvm'
elif [[ $prev == "kvm" ]]; then
- subcmds="top record report diff buildid-list stat"
+ subcmds=$($cmd kvm --list-cmds)
__perfcomp_colon "$subcmds" "$cur"
# List long option names
elif [[ $cur == --* ]]; then
--
1.8.5.2.227.g53f3478
--
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