tools lib subcmd: Add OPT_STRING_OPTARG_SET option

To allow string options with a default argument and variable set when
the option is used.

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Tested-by: Wang Nan <wangnan0@huawei.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1483431600-19887-2-git-send-email-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

2 files changed, 8 insertions, 0 deletions

diff --git a/tools/lib/subcmd/parse-options.c b/tools/lib/subcmd/parse-options.c
index 3284bb14ae78..8aad81151d50 100644
--- a/tools/lib/subcmd/parse-options.c
+++ b/tools/lib/subcmd/parse-options.c
@@ -213,6 +213,9 @@ static int get_value(struct parse_opt_ctx_t *p,
                 else
                         err = get_arg(p, opt, flags, (const char **)opt->value);
 
+                if (opt->set)
+                        *(bool *)opt->set = true;
+
                 /* PARSE_OPT_NOEMPTY: Allow NULL but disallow empty string. */
                 if (opt->flags & PARSE_OPT_NOEMPTY) {
                         const char *val = *(const char **)opt->value;
diff --git a/tools/lib/subcmd/parse-options.h b/tools/lib/subcmd/parse-options.h
index 8866ac438b34..11c3be3bcce7 100644
--- a/tools/lib/subcmd/parse-options.h
+++ b/tools/lib/subcmd/parse-options.h
@@ -137,6 +137,11 @@ struct option {
         { .type = OPTION_STRING,  .short_name = (s), .long_name = (l), \
           .value = check_vtype(v, const char **), (a), .help = (h), \
           .flags = PARSE_OPT_OPTARG, .defval = (intptr_t)(d) }
+#define OPT_STRING_OPTARG_SET(s, l, v, os, a, h, d) \
+        { .type = OPTION_STRING, .short_name = (s), .long_name = (l), \
+          .value = check_vtype(v, const char **), (a), .help = (h), \
+          .flags = PARSE_OPT_OPTARG, .defval = (intptr_t)(d), \
+          .set = check_vtype(os, bool *)}
 #define OPT_STRING_NOEMPTY(s, l, v, a, h)   { .type = OPTION_STRING,  .short_name = (s), .long_name = (l), .value = check_vtype(v, const char **), (a), .help = (h), .flags = PARSE_OPT_NOEMPTY}
 #define OPT_DATE(s, l, v, h) \
         { .type = OPTION_CALLBACK, .short_name = (s), .long_name = (l), .value = (v), .argh = "time", .help = (h), .callback = parse_opt_approxidate_cb }