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Add a -N option that makes sysctl(8) print out just the variable names.

Browse Source 
Zsh users can add the following to their .zshrc for sysctl completion:

function listsysctls {
    case $1 in
    *.*) set -A reply $(sysctl -AN ${1%.*}) ;;
    *) set -A reply $(sysctl -AN) ;;
    esac
}
compctl -K listsysctls sysctl

While I'm here, brucify the getopt() switch.
This commit is contained in:
Dag-Erling Smørgrav 2001-01-14 16:40:06 +00:00
parent 202b18cdaa
commit ca5fac557f
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=71034
1 changed files with 31 additions and 10 deletions
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41
sbin/sysctl/sysctl.c
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@ -58,7 +58,7 @@ static const char rcsid[] =
#include <string.h>
#include <unistd.h>
static int Aflag, aflag, bflag, nflag, wflag, Xflag;
static int Aflag, aflag, bflag, Nflag, nflag, wflag, Xflag;
static int oidfmt(int *, int, char *, u_int *);
static void parse(char *);
@ -86,21 +86,37 @@ main(int argc, char **argv)
setbuf(stdout,0);
setbuf(stderr,0);
while ((ch = getopt(argc, argv, "AabnwX")) != -1) {
while ((ch = getopt(argc, argv, "AabNnwX")) != -1) {
switch (ch) {
case 'A': Aflag = 1; break;
case 'a': aflag = 1; break;
case 'b': bflag = 1; break;
case 'n': nflag = 1; break;
case 'w': wflag = 1; break;
case 'X': Xflag = Aflag = 1; break;
default: usage();
case 'A':
Aflag = 1;
break;
case 'a':
aflag = 1;
break;
case 'b':
bflag = 1;
break;
case 'N':
Nflag = 1;
break;
case 'n':
nflag = 1;
break;
case 'w':
wflag = 1;
break;
case 'X':
Xflag = Aflag = 1;
break;
default:
usage();
}
}
argc -= optind;
argv += optind;
if (wflag && (Aflag || aflag))
if ((wflag && (Aflag || aflag)) || (Nflag && nflag))
usage();
if (Aflag || aflag)
exit (sysctl_all(0, 0));
@ -361,6 +377,11 @@ show_var(int *oid, int nlen)
if (i || !j)
err(1, "sysctl name %d %d %d", i, j, errno);
if (Nflag) {
printf("%s", name);
return (0);
}
/* find an estimate of how much we need for this var */
j = 0;
i = sysctl(oid, nlen, 0, &j, 0, 0);