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From: jinx@milton.u.washington.edu (Everyone Knows JINX)
Newsgroups: comp.lang.c
Subject: Re: Appending environment variable to system calls...
Message-ID: <1991Apr1.233526.21647@milton.u.washington.edu>
Date: 1 Apr 91 23:35:26 GMT
Article-I.D.: milton.1991Apr1.233526.21647
References: <11697.27f376d8@zeus.unomaha.edu> <22200@yunexus.YorkU.CA>
Organization: University of Washington
Lines: 25

racine@yunexus.yorku.ca (Jeff Racine) writes:

>I wish to be able to set an environment variable (the path to a file)
>and then to execute a program using the system() function in the
>following fashion:

>	char *s;
>	s=getenv("FOO");
>	system("FOO/FUBAR");

>or something like that. I am using Turbo-C running under MS-DOS, and
>the manuals do not seem to help me :-).

>I know this is a simple problem and that I am missing something
>obvious (such as I should not be using the system() function). I would
>really like some help on this approach (or rather the correct
>aproach).

To do this, I always did something like:

s = getenv("FOO");
sprintf (command_line, "%s/FUBAR", s);
system(command_line);

It uses an extra variable, but...