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([10.237.223.87]) by orsmga008.jf.intel.com with ESMTP; 20 May 2022 08:12:52 -0700 From: Bruce Richardson To: dev@dpdk.org Cc: stable@dpdk.org, weiyuanx.li@intel.com, Bruce Richardson , Olivier Matz , Ray Kinsella Subject: [PATCH v2 1/2] cmdline: add function to verify valid commands Date: Fri, 20 May 2022 16:12:39 +0100 Message-Id: <20220520151240.139566-2-bruce.richardson@intel.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20220520151240.139566-1-bruce.richardson@intel.com> References: <20220520145631.137962-1-bruce.richardson@intel.com> <20220520151240.139566-1-bruce.richardson@intel.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org The cmdline library cmdline_parse() function parses a command and executes the action automatically too. The cmdline_valid_buffer function also uses this function to validate commands, meaning that there is no function to validate a command as ok without executing it. To fix this omission, we extract the body of cmdline_parse into a new static inline function with an extra parameter to indicate whether the action should be performed or not. Then we create two wrappers around that - a replacement for the existing cmdline_parse function where the extra parameter is "true" to execute the command, and a new function "cmdline_parse_check" which passes the parameter as "false" to perform cmdline validation only. Signed-off-by: Bruce Richardson --- lib/cmdline/cmdline_parse.c | 20 +++++++++++++++++--- lib/cmdline/cmdline_parse.h | 17 +++++++++++++++-- lib/cmdline/version.map | 3 +++ 3 files changed, 35 insertions(+), 5 deletions(-) diff --git a/lib/cmdline/cmdline_parse.c b/lib/cmdline/cmdline_parse.c index 349ec87bd7..b7fdc67ae5 100644 --- a/lib/cmdline/cmdline_parse.c +++ b/lib/cmdline/cmdline_parse.c @@ -7,6 +7,7 @@ #include #include #include +#include #include @@ -182,8 +183,8 @@ match_inst(cmdline_parse_inst_t *inst, const char *buf, } -int -cmdline_parse(struct cmdline *cl, const char * buf) +static inline int +__cmdline_parse(struct cmdline *cl, const char *buf, bool call_fn) { unsigned int inst_num=0; cmdline_parse_inst_t *inst; @@ -284,7 +285,8 @@ cmdline_parse(struct cmdline *cl, const char * buf) /* call func */ if (f) { - f(result.buf, cl, data); + if (call_fn) + f(result.buf, cl, data); } /* no match */ @@ -296,6 +298,18 @@ cmdline_parse(struct cmdline *cl, const char * buf) return linelen; } +int +cmdline_parse(struct cmdline *cl, const char *buf) +{ + return __cmdline_parse(cl, buf, true); +} + +int +cmdline_parse_check(struct cmdline *cl, const char *buf) +{ + return __cmdline_parse(cl, buf, false); +} + int cmdline_complete(struct cmdline *cl, const char *buf, int *state, char *dst, unsigned int size) diff --git a/lib/cmdline/cmdline_parse.h b/lib/cmdline/cmdline_parse.h index e4d802fff7..6dd210d843 100644 --- a/lib/cmdline/cmdline_parse.h +++ b/lib/cmdline/cmdline_parse.h @@ -7,6 +7,8 @@ #ifndef _CMDLINE_PARSE_H_ #define _CMDLINE_PARSE_H_ +#include + #ifdef __cplusplus extern "C" { #endif @@ -149,11 +151,22 @@ typedef cmdline_parse_inst_t *cmdline_parse_ctx_t; * argument buf must ends with "\n\0". The function returns * CMDLINE_PARSE_AMBIGUOUS, CMDLINE_PARSE_NOMATCH or * CMDLINE_PARSE_BAD_ARGS on error. Else it calls the associated - * function (defined in the context) and returns 0 - * (CMDLINE_PARSE_SUCCESS). + * function (defined in the context) and returns the parsed line length (>= 0) */ int cmdline_parse(struct cmdline *cl, const char *buf); +/** + * Try to parse a buffer according to the specified context, but do not + * perform any function calls if parse is successful. + * + * The argument buf must ends with "\n\0". + * The function returns CMDLINE_PARSE_AMBIGUOUS, CMDLINE_PARSE_NOMATCH or + * CMDLINE_PARSE_BAD_ARGS on error and returns the parsed line length (>=0). + * on successful parse + */ +__rte_experimental +int cmdline_parse_check(struct cmdline *cl, const char *buf); + /** * complete() must be called with *state==0 (try to complete) or * with *state==-1 (just display choices), then called without diff --git a/lib/cmdline/version.map b/lib/cmdline/version.map index b9bbb87510..fc7fdd6ea4 100644 --- a/lib/cmdline/version.map +++ b/lib/cmdline/version.map @@ -81,5 +81,8 @@ EXPERIMENTAL { rdline_get_history_buffer_size; rdline_get_opaque; + # added in 22.07 + cmdline_parse_check; + local: *; }; -- 2.34.1