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Path: utzoo!watmath!clyde!burl!ulysses!allegra!mit-eddie!genrad!panda!talcott!harvard!bbnccv!mirror!rs
From: rs@mirror.UUCP
Newsgroups: net.sources
Subject: doing tildes in filenames
Message-ID: <12100006@mirror.UUCP>
Date: Tue, 27-Aug-85 16:54:00 EDT
Article-I.D.: mirror.12100006
Posted: Tue Aug 27 16:54:00 1985
Date-Received: Sat, 31-Aug-85 03:34:24 EDT
Lines: 82
Nf-ID: #N:mirror:12100006:000:1480
Nf-From: mirror!rs    Aug 27 16:54:00 1985



This short little function has come in handy in a couple of
programs where I wanted to get a filename or directory name
from a luser.  It expands csh/uucp "~"-escapes in place.

Enjoy,
	/r$

#include <pwd.h>

extern char	*getenv();
extern char	*strcpy();
extern char	*strcat();

/*
** Depending on the system, "USER" might be "NAME" or "LOGNAME",
** or the whole thing might just be "/tmp".
*/
#define DEFAULT_HOME	(getpwnam(getenv("USER"))->pw_dir)
#define SIZE	128

char *
nameglob(s)
    register char		*s;
{
    static char			*home;
    register struct passwd	*pwd;
    register int		 c;
    register char		*p;
    char			 buff[SIZE + 1];

    if (*s == '~')
    {
	(void)strcpy(buff, s + 1);
	if (buff[0] == '/' || buff[0] == '\0')
	{
	    if (!home && !(home = getenv("HOME")))
		home = DEFAULT_HOME;
	    (void)strcpy(s, home);
	    (void)strcat(s, buff);
	}
	else
	{
	    for (p = buff; *p && *p != '/'; p++)
		;
	    if (c = *p)
		*p = '\0';
	    if ((pwd = getpwnam(buff)) == NULL)
		return(NULL);
	    (void)strcpy(s, pwd->pw_dir);
	    if (*p = c)
		strcat(s, p);
	}
    }

    return(s);
}


#ifdef	TEST

extern char	*gets();

main()
{
    char	 buff[SIZE];

    while (gets(buff))
	if (nameglob(buff))
	    printf("\t|%s|\t\n", nameglob(buff));
	else
	    printf("No such user: %s\n", buff);

    exit(0);
}
#endif	TEST

--
Rich $alz	{mit-eddie, ihnp4!inmet, wjh12, cca, datacube} !mirror!rs
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