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Path: utzoo!utcs!mnetor!seismo!elsie!ado
From: ado@elsie.UUCP
Newsgroups: net.unix-wizards
Subject: Re: so who has mkdir and rmdir for system V
Message-ID: <6179@elsie.UUCP>
Date: Sat, 12-Jul-86 18:37:55 EDT
Article-I.D.: elsie.6179
Posted: Sat Jul 12 18:37:55 1986
Date-Received: Sat, 12-Jul-86 23:12:04 EDT
References: <1885@brl-smoke.ARPA>
Organization: NIH-LEC, Bethesda, MD
Lines: 50
Summary: idiot proofing

In article <1885@brl-smoke.ARPA>, gwyn@BRL.ARPA (VLD/VMB) writes:
> int
> mkdir( dirname )
> 	char	*dirname;
> 	{
> ...
> 	(void) strcat( strcpy( buf, "mkdir 2>/dev/null " ), dirname );
> 	retval = system( buf );	/* assuming your system() works right */
> ...

The above can use a bit of idiot proofing--especially against meta characters
in dirname.  Below is the version of "mkdir" that went out with the time zone
stuff.

	#

	/*LINTLIBRARY*/

	#include "stdio.h"

	#ifdef OJBECTID
	static char	sccsid[] = "@(#)mkdir.c	7.2";
	#endif

	extern FILE *	popen();

	mkdir(name)
	char *	name;
	{
		register FILE *	fp;
		register int	c;
		register int	oops;

		if ((fp = popen("sh", "w")) == NULL)
			return -1;
		(void) fputs("mkdir 2>&- '", fp);
		if (name != NULL)
			while ((c = *name++) != '\0')
				if (c == '\'')
					(void) fputs("'\\''", fp);
				else	(void) fputc(c, fp);
		(void) fputs("'\n", fp);
		oops = ferror(fp);
		return (pclose(fp) == 0 && !oops) ? 0 : -1;
	}
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