I always wanted to contribute to this project. May I give this a try? Will add more options to syscmds Usage listed in syscmd.c as per manpages.

Sure! feel free to contribute on this! it's a good first issue but this task is about using the r_core_help apis instead of eprintf() for all the eprintf ("Usage") lines.

On manpage-style, i would go for markdown (r2 have a markdown parser already), and it can also read the r2book as a manpage, so better to document such large things in there imho, not inline in the program

@trufae Thank you for the clarification. I will ping again for any queries as I am new to this project. Is there any advice from your side, anything I should know before starting working on this.

@qascade Just want to inform you of the existence of r_core_cmd_help_match() and r_core_cmd_help_match_spec(), as they were both created specifically to assist with this kind of task.

Declarations:

$ git grep -n 'r_core_cmd_help[^ ]*('
libr/core/cmd.c:357:R_API void r_core_cmd_help(const RCore *core, const char *help[]) {
libr/core/cmd.c:362:R_API void r_core_cmd_help_match(const RCore *core, const char *help[], R_BORROW R_NONNULL char *cmd, bool exact) {
libr/core/cmd.c:366:R_API void r_core_cmd_help_match_spec(const RCore *core, const char *help[], R_BORROW R_NONNULL char *cmd, char spec, bool exact) {
libr/core/cmd_print.c:7682:                              r_core_cmd_help(core, help_msg_p6);
libr/include/r_core.h:876:R_API void r_core_cmd_help(const RCore *core, const char *help[]);
libr/include/r_core.h:877:R_API void r_core_cmd_help_json(const RCore *core, const char *help[]);
libr/include/r_core.h:878:R_API void r_core_cmd_help_match(const RCore *core, const char *help[], R_BORROW R_NONNULL char *cmd, bool exact);
libr/include/r_core.h:879:R_API void r_core_cmd_help_match_spec(const RCore *core, const char *help[], R_BORROW R_NONNULL char *cmd, char spec, bool exact);

You can find usage with git grep 'r_core_cmd_help_match '.

Reference commit for anyone who wants to contribute: #21418

$ sys/counters.sh|grep eUsa
eUsage	     177

lets make this number down to zero!

I think @Lazula fixed them all. Except the ones in utils like syscmd stuff. Maybe those helps should be implemented in core. But we are 90% good on this now. Thanks for the amazing contribs!