Change Struct module pointer - c

Question

Good day all, I'd like some help to change a small section in this C program which I have licensed back in the early 90's. Some of you may be familiar with it, it's called MajorBBS and as you probably have guess it is bbs software.
In the header file majorbbs.h we have
extern
struct module { /* module interface block */
char descrp[MNMSIZ]; /* description for main menu */
int (*lonrou)(); /* user logon supplemental routine */
int (*sttrou)(); /* input routine if selected */
void (*stsrou)(); /* status-input routine if selected */
int (*injrou)(); /* "injoth" routine for this module */
int (*lofrou)(); /* user logoff supplemental routine */
void (*huprou)(); /* hangup (lost carrier) routine */
void (*mcurou)(); /* midnight cleanup routine */
void (*dlarou)(); /* delete-account routine */
void (*finrou)(); /* finish-up (sys shutdown) routine */
} **module;
Also in the majorbbs.h we have some code that defines the menu variables
extern
struct usrmnu { /* user's menuing-specific variables */
char curpag[PNMSIZ]; /* current menu page */
char parpag[PNMSIZ]; /* parent menu page */
char selchrs[MAXSEL]; /* select characters currently available */
char pages[MAXSEL][PNMSIZ]; /* pages or file names for select chars */
char optdsp[MAXSEL]; /* instructions on how to display options */
int keyreq[MAXSEL]; /* key required for each select character */
FILE *fp; /* pointer to file currently being viewed */
char mnuttl[TITLSZ]; /* menu page title */
} *mnuusr;
Then in the majorbbs.c file we have
struct module module00={ /* module interface block */
"Menuing System", /* description for main menu */
NULL, /* user logon supplemental routine */
mainu, /* input routine if selected */
musthn, /* status-input routine if selected */
NULL, /* "injoth" routine for this module */
NULL, /* user logoff supplemental routine */
loscar, /* hangup (lost carrier) routine */
midnit, /* midnight cleanup routine */
NULL, /* delete-account routine */
mjrfin /* finish-up (sys shutdown) routine */
};
What I'd like is to change the value of the descrp here which is defined as "Menuing System" to something more dynamic like the Menu the user is currently on.
From the code here I think it would be mnuusr->curpag which is where the pointer is pointing to I think.
So I'm thinking of a routine. I am by no means a programmer and I've been there many sites to look for examples of how to do such a thing. I've searched here for the last couple days (before posting this). I saw some things
that sparked a "Hey this might work" but I ended up with compiler errors (more on that in a bit)
What I did was make a routine like
char *
mydescrp
{
if (strcmp(module00.descrp,"Menuing System" ) == 0 ) {
mnuusr=mnuoff(usrnum);
return(mnuusr->mnuttl);
}
}
Then if I change the module00 call above to
struct module module00={
mydescrp, /* My change */
NULL,
mainu,
musthn,
NULL,
NULL,
loscar,
midnit,
NULL,
mjrfin
};
When I compile I get some error that says:
Initalization not fully bracketed
the list goes on from there. There are some further initialization later on in majorbbs.c and will gladly supply them if you need. I am sure one would be.
int
register_module( /* register a module for online use */
struct module *mod) /* pointer to a module block */
{
if (strlen(mod->descrp) > MNMSIZ-1) {
catastro("MODULE NAME \"%s\" TOO LONG!",mod->descrp);
}
if (mod->stsrou == NULL) {
mod->stsrou=dfsthn;
}
if (nmods == 0) {
module=(struct module **)alcmem(sizeof(struct module *));
mdstats=(struct mdstats *)alcmem(sizeof(struct mdstats));
}
else {
module=(struct module **)alcrsz(module,sizeof(struct module *)*nmods,
sizeof(struct module *)*(nmods+1));
mdstats=(struct mdstats *)alcrsz(mdstats,sizeof(struct mdstats)*nmods,
sizeof(struct mdstats)*(nmods+1));
}
module[nmods]=mod;
setbtv(mstbb);
if (qeqbtv(mod->descrp,0)) {
gcrbtv(&mdstats[nmods],0);
}
else {
setmem(&mdstats[nmods],sizeof(struct mdstats),0);
strcpy(mdstats[nmods].mdname,mod->descrp);
}
rstbtv();
return(nmods++);
}
From MENUING.C mnuoff routine
struct usrmnu *
mnuoff( /* get pointer to user's menu info */
int unum) /* user number to grab */
{
#ifdef PHARLAP
return((struct usrmnu *)((long)(eclmnubas+(unum<<3))<<16));
#else
#ifdef ECLIPSE
return((struct usrmnu *)((long)(eclmnubas+(unum<<3))<<16));
#else
return((struct usrmnu *)(muusrs+(unum*(long)sizeof(struct usrmnu))));
#endif
#endif
}
Is this the routine to change for some newly code? I am simply at a loss on how to go about this. If you need more code let me know.
I even went as far as asking for help from other majorbbs programmers on usenet but this software is 20 years + old so I don't think anyone uses it anymore let alone modify code anymore. I would think since it's still C someone might have an idea to help me out. I am trying to create a new revive with some small modifications. This being one of two.
Thanks for any help.

Answer 1

It looks like the descrp field in struct module is expecting a char[] (or a string), and you're giving it a char *() (function returning a string) instead.
Perhaps what you want to do is not call the mydescrp function in the declaration of module00, but manually perform the check in register_module:
int register_module(struct module *mod) {
if (strcmp(mod->descrp, "Menuing System") == 0) {
struct usrmnu *menu = mnuoff(usrnum);
// Copy as much of the title to the menu description as possible.
strncpy(mod->descrp, menu->mnuttl, MNMSIZ-1);
// Terminate the string in case the title was too long.
mod->descrp[MNMSIZ-1] = '\0';
}
// Rest of method.
}