Thank you all for your wonderful replies! I should have known it was a macro, thank you.
Very informative help from you Oliver. 2010/2/3 Daniel Molina Wegener <d...@coder.cl> > On Wednesday 03 February 2010, > Marc Olzheim <z...@zlo.nu> wrote: > > > On Wed, Feb 03, 2010 at 10:23:50AM -0300, Daniel Molina Wegener wrote: > > > > I'm having trouble looking this function up in the source tree, the > > > > trail seems to end at __sys_read which has a bunch of prototypes but > i > > > > can't find the actual function code. > > > > > > Well, you can try cscope --- IMO the best option to > > > search for symbols in the source tree. Also you have > > > well done front-ends like cbrowser, codelite and emacs > > > plus cscope mode. > > > > Works wonders in vim as well. :-) > > Sure, vim supports cscope since 2000 and possibly before that, > indeed vim was my first programming editor in FreeBSD and Linux. > Then I've learned emcas, and now I use both editors --- the first > available on the machine that I'm working on --- also emacs requires > a lot of configurations, but is my primary editor on my FreeBSD > boxes. > > > > > > > So my question is primarily, does getc use the read system call > > > > eventually? > > > > > > No, certainly not. Take a look on stdio.h and libc > > > implementation on lib/libc/stdio/getc.c. Mainly on the > > > __sgetc(f) macro. > > > > If you follow macros long enough, you'll find that it obviously does use > > the read system call. read, readv, pread, preadv are basicly the system > > calls through which all normal reads take place. > > That's right, but cscope or even etags should help a lot > finding those simbols, most for large source trees like > the FreeBSD base system ;) > > > > > Marc > > > > Best regards, > -- > Daniel Molina Wegener <dmw [at] coder [dot] cl> > Software Architect, System Programmer & Web Developer > Phone: +1 (510) 629-4267 | Blog: http://coder.cl/ > -- Med vänliga hälsningar / With kind regards Stefan Midjich http://swehack.se/cv https://www.swehack.se/cv _______________________________________________ freebsd-hackers@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-hackers To unsubscribe, send any mail to "freebsd-hackers-unsubscr...@freebsd.org"
