Functions pointers and stuff

[Gordon Cross]

In article <1715 at leah.Albany.Edu> rds95 at leah.Albany.Edu (Robert Seals) writes:
}I got a question. Suppose I know the name of a function, like so:
}
}	char *f = "A_Function";
}
}and I got a function of the same name like so:
}
}	void A_Function(void) { /* stuff */ }
}
}Is there some sneaky way to execute the function when all I know is
}the name of it, i.e., a pointer to several letters which spell it's name.

One way is to read the symbol table from the executable file.  This requires
that you can obtain the name of the file in all cases (someone could rename
your program only to discover that doing so breaks it!!).  The /proc file
system (if you have one) provides an ioctl call to get an open file descriptor
for the file.  Even so, the "strip" command would then break your program...

Simply put, there really is no better way (that I know of anyway) than the
name/function-pointer table lookup you are doing now...
-- 

Gordon Cross             UUCP:      uunet!ingr!crossgl     "all opinions are
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