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BUG: https://bugzilla.samba.org/show_bug.cgi?id=11616 Signed-off-by: Stefan Metzmacher <metze@samba.org> Reviewed-by: Alexander Bokovoy <ab@samba.org> |
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| .. | ||
| loadparm_server_role.c | ||
| loadparm.c | ||
| loadparm.h | ||
| param_table.c | ||
| param.h | ||
| README | ||
| s3_param.h | ||
| samba-hostconfig.pc.in | ||
| util.c | ||
| wscript_build | ||
libsamba-hostconfig ------------------- This directory contains "libsamba-hostconfig". The libsamba-hostconfig library provides access to all host-wide configuration such as the configured shares, default parameter values and host secret keys. Adding a parameter ------------------ To add or change an smb.conf option, in general you only have to add the documentation to docs-xml/smbdotconf, or change it. In addition to that, if special defaults are needed, the functions loadparm_init() in lib/param/loadparm.c and/or init_globals() in source3/param/loadparm.c need to be adapted accordingly. The rest is generated for you. It is important to get the attributes right in the <samba:parameter ...> tag of the xml files. These determine the details of the generated code. - Supported attributes are name, context, type, constant, function, generated_function, synonym, parm, enumlist, handler, and deprecated. - Supported contexts are 'G' (for global) and 'S' (for share). - Supported types are boolean, boolean-rev, boolean-auto, list, cmdlist, string, ustring, char, integer, bytes, octal, and enum. Using smb.conf parameters in the code ------------------------------------- Call the lpcfg_*() function. To get the lp_ctx, have the caller pass it to you. To get a lp_ctx for the source3/param loadparm system, use: struct loadparm_context *lp_ctx = loadparm_init_s3(tmp_ctx, loadparm_s3_helpers()); Remember to talloc_unlink(tmp_ctx, lp_ctx) the result when you are done! To get a lp_ctx for the lib/param loadparm system, typically the pointer is already set up by popt at startup, and is passed down from cmdline_lp_ctx. In pure source3/ code, you may use lp_*() functions, but are encouraged to use the lpcfg_*() functions so that code can be made common. How does loadparm_init_s3() work? --------------------------------- loadparm_s3_helpers() returns a initialised table of function pointers, pointing at all global lp_*() functions, except for those that return substituted strings (% macros). The lpcfg_*() function then calls this plugged in function, allowing the one function and pattern to use either loadparm system. There is a lot of generated code, here, what generates what? ------------------------------------------------------------ The regular format of the CPP macros in param_functions.c is used to generate up the prototypes (mkproto.pl, mks3param_proto.pl), the service and globals table (mkparamdefs.pl), the glue table (mmks3param.pl) and the initilisation of the glue table (mks3param_ctx_table.pl). I have tried combining some of these, but it just makes the scripts more complex. The CPP macros are defined in and expand in lib/param/loadparm.c and source3/param/loadparm.c to read the values from the generated stuctures. They are CPP #included into these files so that the same macro has two definitions, depending on the system it is loading into. Why was this done, rather than a 'proper' fix, or just using one system or the other? ------------------------------------------------------------------------------------- This was done to allow merging from both ends - merging more parts of the loadparm handling, and merging code that needs to read the smb.conf, without having to do it all at once. Ideally param_functions.c would be generated from param_table.c or (even better) our XML manpage source, and the CPP macros would instead be generated expanded as generated C files, but this is a task nobody has taken on yet.