georg@SunLab13.essex.ac.uk (Georgatos G) (12/01/89)
Does anybody know how to call an executable file from a C-program ?
I am using the Unix CC compiler.
Hgg89.jik@athena.mit.edu (Jonathan I. Kamens) (12/03/89)
In article <2614@servax0.essex.ac.uk> georg@essex.ac.uk writes: > Does anybody know how to call an executable file from a C-program ? > I am using the Unix CC compiler. Try looking at the man pages for execve(2), execl(3) and system(3). This is the kind of question that almost undoubtedly belongs in the comp.unix.questions newsgroup, not comp.unix.wizards, because it is a simple question that is answered directly by an available man page. Questions should be asked in Comp.unix.wizards only if you are really sure they are "wizard-level" questions, or if you have asked in comp.unix.questions, waited a few days, and still not received any answers (although that probably won't happen). Furthermore, as the monthly posting to comp.unix.questions points out, there is almost undoubtedly someone at your site who could have answered this question. You should try to avoid posting questions to the entire net that could be answered easily by someone at your site. Jonathan Kamens USnail: MIT Project Athena 11 Ashford Terrace jik@Athena.MIT.EDU Allston, MA 02134 Office: 617-253-8495 Home: 617-782-0710
woody@rpp386.cactus.org (Woodrow Baker) (12/04/89)
In article <2614@servax0.essex.ac.uk>, georg@SunLab13.essex.ac.uk (Georgatos G) writes: > > > Does anybody know how to call an executable file from a C-program ? > I am using the Unix CC compiler. > > > Hgg89. Seems that there is a function in most c compilers called execl or execle or execlp or execv etc that does this nicely. Fork seems to it do it also.
woody@rpp386.cactus.org (Woodrow Baker) (12/05/89)
In article <17401@rpp386.cactus.org>, woody@rpp386.cactus.org (Woodrow Baker) writes: > In article <2614@servax0.essex.ac.uk>, georg@SunLab13.essex.ac.uk (Georgatos G) writes: > > > > > > Does anybody know how to call an executable file from a C-program ? > > I am using the Unix CC compiler. > > > > > > Hgg89. > > Seems that there is a function in most c compilers called execl or execle > or execlp or execv etc that does this nicely. Fork seems to it do it also. > I heard from a lot of people on this one. I think a question deserves an answer regardless of the level of the questioner. Just because this is unix.wizards, is no justification for the tone of some messages that I got and that I have seen posted. I peruse this discussion, because I work in an MS-DOS world, and have a need to learn some about unix. I have a XENIX system at home...on a hard disk...setting on my bookshelf...problably where it will stay for a while, as I can't find tools that even begin to approach what I have in the MS-DOS world, I know, go flame somewhere else.... It turns out that the compiler that I use has a function called fork that DOES NOT make a copy of the calling program. It DOES pass a command line to an external program and invoke it. (either a .com or .exe (ms-dos)) file, and returns control back to the calling program. The compiler is a rather old 'C' compiler, and is apparently not unix compliant. I use the fork function of my compiler in all the versions of the RLL compiler that I maintain and work.
chrisc@astroatc.UUCP (Chris Czerwinski) (12/09/89)
In article <2614@servax0.essex.ac.uk> georg@essex.ac.uk writes: > > > Does anybody know how to call an executable file from a C-program ? > I am using the Unix CC compiler. > > > Hgg89. As they say in news.announce.newusers (something you obviousely haven't looked at)....RTFM! This question can easily be answered in the man pages or your sys admin... For those who don't know RTFM, Read The F***ing Manual. Astronautics Corporation of America __ __ / ' / * / ' * / * / /_ __ , _ / __ _ __ , , __, __ _ /_/ , (____/ /_/ (_/_/_)_ (_____/_(<_/ (_/_/_/ /_/ /_/_)_/ \_/__ Chris Czerwinski /| Quality Assurance <chrisc@astroatc> |/ ACA - Corporate Headquarters