diff options
| -rw-r--r-- | tools/perf/builtin-config.c | 45 |
1 files changed, 41 insertions, 4 deletions
diff --git a/tools/perf/builtin-config.c b/tools/perf/builtin-config.c index df3fa1c18e55..88a43fe4963c 100644 --- a/tools/perf/builtin-config.c +++ b/tools/perf/builtin-config.c @@ -82,6 +82,27 @@ static int show_config(struct perf_config_set *set) return 0; } +static int parse_config_arg(char *arg, char **var) +{ + const char *last_dot = strchr(arg, '.'); + + /* + * Since "var" actually contains the section name and the real + * config variable name separated by a dot, we have to know where the dot is. + */ + if (last_dot == NULL || last_dot == arg) { + pr_err("The config variable does not contain a section name: %s\n", arg); + return -1; + } + if (!last_dot[1]) { + pr_err("The config variable does not contain a variable name: %s\n", arg); + return -1; + } + + *var = arg; + return 0; +} + int cmd_config(int argc, const char **argv, const char *prefix __maybe_unused) { int i, ret = 0; @@ -130,10 +151,26 @@ int cmd_config(int argc, const char **argv, const char *prefix __maybe_unused) } break; default: - if (argc) - for (i = 0; argv[i]; i++) - ret = show_spec_config(set, argv[i]); - else + if (argc) { + for (i = 0; argv[i]; i++) { + char *var, *arg = strdup(argv[i]); + + if (!arg) { + pr_err("%s: strdup failed\n", __func__); + ret = -1; + break; + } + + if (parse_config_arg(arg, &var) < 0) { + free(arg); + ret = -1; + break; + } + + ret = show_spec_config(set, var); + free(arg); + } + } else usage_with_options(config_usage, config_options); } |