/* $OpenBSD: timedc.c,v 1.12 2003/10/12 23:44:13 deraadt Exp $ */ /*- * Copyright (c) 1985, 1993 The 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. 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) 1985, 1993 The Regents of the University of California.\n\ All rights reserved.\n"; #endif /* not lint */ #ifndef lint static char sccsid[] = "@(#)timedc.c 5.1 (Berkeley) 5/11/93"; #endif /* not lint */ #include "timedc.h" #include #include #include #include #include #include int trace = 0; FILE *fd = NULL; int margc; int fromatty; #define MAX_MARGV 20 char *margv[MAX_MARGV]; char cmdline[200]; static struct cmd *getcmd(char *); volatile sig_atomic_t gotintr; int main(int argc, char *argv[]) { extern int sock_raw, sock; struct sockaddr_in sin; struct cmd *c; sock_raw = socket(AF_INET, SOCK_RAW, IPPROTO_ICMP); if (sock_raw < 0) { perror("opening raw socket"); exit(1); } (void) seteuid(getuid()); (void) setuid(getuid()); openlog("timedc", LOG_ODELAY, LOG_AUTH); sock = socket(AF_INET, SOCK_DGRAM, 0); if (sock < 0) { perror("opening socket"); (void)close(sock_raw); return (-1); } memset(&sin, 0, sizeof sin); sin.sin_family = AF_INET; sin.sin_addr.s_addr = INADDR_ANY; if (bind(sock, (struct sockaddr *)&sin, sizeof(sin)) < 0) { fprintf(stderr, "all reserved ports in use\n"); (void)close(sock_raw); exit(1); } 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)); (void) signal(SIGINT, sigintr); for (;;) { if (gotintr) { putchar('\n'); gotintr = 0; } if (fromatty) { printf("timedc> "); (void) fflush(stdout); } siginterrupt(SIGINT, 1); if (fgets(cmdline, sizeof(cmdline), stdin) == NULL) { if (errno == EINTR && gotintr) { siginterrupt(SIGINT, 0); continue; } quit(0, NULL); } siginterrupt(SIGINT, 0); if (cmdline[0] == 0) break; if (makeargv()) { printf("?Too many arguments\n"); continue; } if (margv[0] == 0) continue; 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); } return 0; } void sigintr(int signo) { if (!fromatty) _exit(0); gotintr = 1; } static struct cmd * getcmd(char *name) { char *p, *q; struct cmd *c, *found; 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. */ int makeargv(void) { char **argp = margv; char *cp; margc = 0; for (cp = cmdline; margc < MAX_MARGV - 1 && *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'; } if (margc == MAX_MARGV - 1) return 1; *argp++ = 0; return 0; } #define HELPINDENT (sizeof ("directory")) /* * Help command. */ void help(int argc, char *argv[]) { extern struct cmd cmdtab[]; struct cmd *c; if (argc == 1) { int columns, width = 0, lines; extern int NCMDS; int i, j, w; 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) { 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", (int)HELPINDENT, c->c_name, c->c_help); } }