27-Aug-85 19:17:33-MDT,1774;000000000001
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From: "Larry J. Barello" <
[email protected]>
Newsgroups: net.sources
Subject: Son of 'which'
Message-ID: <
[email protected]>
Date: 26 Aug 85 14:40:19 GMT
To:
[email protected]
A week or so I posted a quick C version of the UCB shell script
"which". It takes as arguments command names and searches your path
for instances of them. The version I posted had some cute bugs: it
didn't work if you didn't have a path or if there were a null
component in the path (Thanks to Tom Truscott). To the folks with v8
shell: wish I had it, sounds like it make a lot of utilities, like
this one, useless.
Here is a fancified version of the original one.
..!uw-beaver!teltone!larry
-------- cut here (duh) -------
#include <stdio.h>
char *getenv();
char *index();
int
main(ac,av)
char **av;
{
char *origpath, *path, *cp;
char buf[200];
char patbuf[512];
int quit, found;
if (ac < 2) {
fprintf(stderr, "Usage: %s cmd [cmd, ..]\n", *av);
exit(1);
}
if ((origpath = getenv("PATH")) == 0)
origpath = ".";
av[ac] = 0;
for(av++ ; *av; av++) {
strcpy(patbuf, origpath);
cp = path = patbuf;
quit = found = 0;
while(!quit) {
cp = index(path, ':');
if (cp == NULL)
quit++;
else
*cp = '\0';
sprintf(buf, "%s/%s", (*path ? path:"."), *av);
path = ++cp;
if (access(buf, 1) == 0) {
printf("%s\n", buf);
found++;
}
}
if (!found)
printf("No %s in %s\n", *av, origpath);
}
exit(0);
}
------------------
