Add libedit command line history capability to lpc(8).
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@ -1,4 +1,4 @@
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# $NetBSD: Makefile,v 1.8 1997/10/10 09:26:38 lukem Exp $
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# $NetBSD: Makefile,v 1.9 2006/01/12 17:53:03 garbled Exp $
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# @(#)Makefile 8.1 (Berkeley) 6/6/93
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PROG= lpc
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@ -7,4 +7,7 @@ SRCS= lpc.c cmds.c cmdtab.c
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BINGRP= daemon
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BINMODE=2555
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LDADD+= -ledit -ltermcap
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DPADD+= ${LIBEDIT} ${LIBTERMCAP}
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.include <bsd.prog.mk>
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@ -1,4 +1,4 @@
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/* $NetBSD: lpc.c,v 1.17 2005/11/28 03:26:06 christos Exp $ */
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/* $NetBSD: lpc.c,v 1.18 2006/01/12 17:53:03 garbled Exp $ */
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/*
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* Copyright (c) 1983, 1993
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@ -37,7 +37,7 @@ __COPYRIGHT("@(#) Copyright (c) 1983, 1993\n\
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#if 0
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static char sccsid[] = "@(#)lpc.c 8.3 (Berkeley) 4/28/95";
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#else
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__RCSID("$NetBSD: lpc.c,v 1.17 2005/11/28 03:26:06 christos Exp $");
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__RCSID("$NetBSD: lpc.c,v 1.18 2006/01/12 17:53:03 garbled Exp $");
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#endif
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#endif /* not lint */
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@ -47,6 +47,7 @@ __RCSID("$NetBSD: lpc.c,v 1.17 2005/11/28 03:26:06 christos Exp $");
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#include <signal.h>
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#include <setjmp.h>
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#include <syslog.h>
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#include <histedit.h>
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#include <unistd.h>
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#include <stdlib.h>
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#include <stdio.h>
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@ -66,11 +67,10 @@ __RCSID("$NetBSD: lpc.c,v 1.17 2005/11/28 03:26:06 christos Exp $");
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* lpc -- line printer control program
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*/
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#define MAX_CMDLINE 200
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#define MAX_MARGV 20
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int fromatty;
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char cmdline[MAX_CMDLINE];
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char *cmdline;
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int margc;
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char *margv[MAX_MARGV];
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int top;
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@ -78,18 +78,22 @@ uid_t uid, euid;
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jmp_buf toplevel;
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History *hist;
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HistEvent he;
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EditLine *elptr;
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static void cmdscanner(int);
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static struct cmd *getcmd(const char *);
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static void intr(int);
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static void makeargv(void);
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static int ingroup(const char *);
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int main(int, char *p[]);
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const char *prompt(void);
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static int parse(char *, char *p[], int);
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int
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main(int argc, char *argv[])
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{
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struct cmd *c;
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euid = geteuid();
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uid = getuid();
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seteuid(uid);
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@ -97,21 +101,8 @@ main(int argc, char *argv[])
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openlog("lpd", 0, LOG_LPR);
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if (--argc > 0) {
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c = getcmd(*++argv);
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if (c == (struct cmd *)-1) {
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printf("?Ambiguous command\n");
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exit(1);
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}
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if (c == 0) {
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printf("?Invalid command\n");
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exit(1);
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}
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if (c->c_priv && getuid() && ingroup(LPR_OPER) == 0) {
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printf("?Privileged command\n");
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exit(1);
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}
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(*c->c_handler)(argc, argv);
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exit(0);
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*argv++;
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exit(!parse(*argv, argv, argc));
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}
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fromatty = isatty(fileno(stdin));
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top = setjmp(toplevel) == 0;
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@ -123,48 +114,87 @@ main(int argc, char *argv[])
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}
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}
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static int
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parse(char *arg, char **pargv, int pargc)
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{
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struct cmd *c;
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c = getcmd(arg);
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if (c == (struct cmd *)-1) {
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printf("?Ambiguous command\n");
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return(0);
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}
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if (c == 0) {
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printf("?Invalid command\n");
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return(0);
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}
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if (c->c_priv && getuid() && ingroup(LPR_OPER) == 0) {
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printf("?Privileged command\n");
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return(0);
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}
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(*c->c_handler)(pargc, pargv);
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return(1);
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}
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static void
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intr(int signo)
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{
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el_end(elptr);
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history_end(hist);
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if (!fromatty)
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exit(0);
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longjmp(toplevel, 1);
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}
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const char *
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prompt(void)
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{
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return ("lpc> ");
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}
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/*
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* Command parser.
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*/
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static void
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cmdscanner(int tp)
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{
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struct cmd *c;
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int scratch;
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const char *elline;
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if (!tp)
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putchar('\n');
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hist = history_init();
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history(hist, &he, H_SETSIZE, 100); /* 100 elt history buffer */
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elptr = el_init(getprogname(), stdin, stdout, stderr);
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el_set(elptr, EL_EDITOR, "emacs");
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el_set(elptr, EL_PROMPT, prompt);
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el_set(elptr, EL_HIST, history, hist);
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el_source(elptr, NULL);
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for (;;) {
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if (fromatty) {
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printf("lpc> ");
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fflush(stdout);
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}
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if (fgets(cmdline, MAX_CMDLINE, stdin) == 0)
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quit(0, NULL);
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cmdline = NULL;
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do {
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if (((elline = el_gets(elptr, &scratch)) != NULL)
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&& (scratch != 0)) {
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history(hist, &he, H_ENTER, elline);
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cmdline = strdup(elline);
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makeargv();
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if (margc == 0)
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} else {
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margc = 0;
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break;
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c = getcmd(margv[0]);
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if (c == (struct cmd *)-1) {
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printf("?Ambiguous command\n");
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}
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} while (margc == 0);
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if (margc == 0)
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quit(0, NULL);
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if (!parse(cmdline, margv, margc)) {
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if (cmdline != NULL)
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free(cmdline);
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continue;
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}
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if (c == 0) {
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printf("?Invalid command\n");
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continue;
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}
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if (c->c_priv && getuid() && ingroup(LPR_OPER) == 0) {
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printf("?Privileged command\n");
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continue;
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}
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(*c->c_handler)(margc, margv);
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fflush(stdout);
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if (cmdline != NULL)
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free(cmdline);
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}
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longjmp(toplevel, 0);
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}
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@ -206,10 +236,11 @@ makeargv(void)
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char *cp;
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char **argp = margv;
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int n = 0;
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size_t s;
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s = sizeof(char) * strlen(cmdline);
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margc = 0;
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for (cp = cmdline; *cp && (cp - cmdline) < sizeof(cmdline) &&
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n < MAX_MARGV; n++) {
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for (cp = cmdline; *cp && (cp - cmdline) < s && n < MAX_MARGV; n++) {
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while (isspace((unsigned char)*cp))
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cp++;
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if (*cp == '\0')
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