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- /*
- * Copyright (c) 1983 Regents of the University of California.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. All advertising materials mentioning features or use of this software
- * must display the following acknowledgement:
- * This product includes software developed by the University of
- * California, Berkeley and its contributors.
- * 4. Neither the name of the University nor the names of its contributors
- * may be used to endorse or promote products derived from this software
- * without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- */
-
- #ifndef lint
- char copyright[] =
- "@(#) Copyright (c) 1983 Regents of the University of California.\n\
- All rights reserved.\n";
- #endif /* not lint */
-
- #ifndef lint
- static char sccsid[] = "@(#)timedc.c 2.10 (Berkeley) 3/5/91";
- #endif /* not lint */
-
- #include "timedc.h"
- #include <signal.h>
- #include <ctype.h>
- #include <setjmp.h>
- #include <syslog.h>
-
- int top;
- int margc;
- int fromatty;
- char *margv[20];
- char cmdline[200];
- jmp_buf toplevel;
- void intr();
- int priv_resources();
- struct cmd *getcmd();
-
-
- main(argc, argv)
- char *argv[];
- {
- register struct cmd *c;
-
- openlog("timedc", LOG_ODELAY, LOG_AUTH);
-
- /*
- * security dictates!
- */
- if (priv_resources() < 0) {
- fprintf(stderr, "Could not get privileged resources\n");
- exit(1);
- }
- (void) setuid(getuid());
-
- if (--argc > 0) {
- c = getcmd(*++argv);
- if (c == (struct cmd *)-1) {
- printf("?Ambiguous command\n");
- exit(1);
- }
- if (c == 0) {
- printf("?Invalid command\n");
- exit(1);
- }
- if (c->c_priv && getuid()) {
- printf("?Privileged command\n");
- exit(1);
- }
- (*c->c_handler)(argc, argv);
- exit(0);
- }
- fromatty = isatty(fileno(stdin));
- top = setjmp(toplevel) == 0;
- if (top)
- (void) signal(SIGINT, intr);
- for (;;) {
- cmdscanner(top);
- top = 1;
- }
- }
-
- void
- intr()
- {
- if (!fromatty)
- exit(0);
- longjmp(toplevel, 1);
- }
-
- /*
- * Command parser.
- */
- cmdscanner(top)
- int top;
- {
- register struct cmd *c;
- extern int help();
-
- if (!top)
- putchar('\n');
- for (;;) {
- if (fromatty) {
- printf("timedc> ");
- (void) fflush(stdout);
- }
- if (fgets(cmdline, sizeof(cmdline), stdin) == 0)
- quit();
- if (cmdline[0] == 0)
- break;
- makeargv();
- c = getcmd(margv[0]);
- if (c == (struct cmd *)-1) {
- printf("?Ambiguous command\n");
- continue;
- }
- if (c == 0) {
- printf("?Invalid command\n");
- continue;
- }
- if (c->c_priv && getuid()) {
- printf("?Privileged command\n");
- continue;
- }
- (*c->c_handler)(margc, margv);
- }
- longjmp(toplevel, 0);
- }
-
- struct cmd *
- getcmd(name)
- register char *name;
- {
- register char *p, *q;
- register struct cmd *c, *found;
- register int nmatches, longest;
- extern struct cmd cmdtab[];
- extern int NCMDS;
-
- longest = 0;
- nmatches = 0;
- found = 0;
- for (c = cmdtab; c < &cmdtab[NCMDS]; c++) {
- p = c->c_name;
- for (q = name; *q == *p++; q++)
- if (*q == 0) /* exact match? */
- return(c);
- if (!*q) { /* the name was a prefix */
- if (q - name > longest) {
- longest = q - name;
- nmatches = 1;
- found = c;
- } else if (q - name == longest)
- nmatches++;
- }
- }
- if (nmatches > 1)
- return((struct cmd *)-1);
- return(found);
- }
-
- /*
- * Slice a string up into argc/argv.
- */
- makeargv()
- {
- register char *cp;
- register char **argp = margv;
-
- margc = 0;
- for (cp = cmdline; *cp;) {
- while (isspace(*cp))
- cp++;
- if (*cp == '\0')
- break;
- *argp++ = cp;
- margc += 1;
- while (*cp != '\0' && !isspace(*cp))
- cp++;
- if (*cp == '\0')
- break;
- *cp++ = '\0';
- }
- *argp++ = 0;
- }
-
- #define HELPINDENT (sizeof ("directory"))
-
- /*
- * Help command.
- */
- help(argc, argv)
- int argc;
- char *argv[];
- {
- register struct cmd *c;
- extern struct cmd cmdtab[];
-
- if (argc == 1) {
- register int i, j, w;
- int columns, width = 0, lines;
- extern int NCMDS;
-
- printf("Commands may be abbreviated. Commands are:\n\n");
- for (c = cmdtab; c < &cmdtab[NCMDS]; c++) {
- int len = strlen(c->c_name);
-
- if (len > width)
- width = len;
- }
- width = (width + 8) &~ 7;
- columns = 80 / width;
- if (columns == 0)
- columns = 1;
- lines = (NCMDS + columns - 1) / columns;
- for (i = 0; i < lines; i++) {
- for (j = 0; j < columns; j++) {
- c = cmdtab + j * lines + i;
- printf("%s", c->c_name);
- if (c + lines >= &cmdtab[NCMDS]) {
- printf("\n");
- break;
- }
- w = strlen(c->c_name);
- while (w < width) {
- w = (w + 8) &~ 7;
- putchar('\t');
- }
- }
- }
- return;
- }
- while (--argc > 0) {
- register char *arg;
- arg = *++argv;
- c = getcmd(arg);
- if (c == (struct cmd *)-1)
- printf("?Ambiguous help command %s\n", arg);
- else if (c == (struct cmd *)0)
- printf("?Invalid help command %s\n", arg);
- else
- printf("%-*s\t%s\n", HELPINDENT,
- c->c_name, c->c_help);
- }
- }
-