1*0Sstevel@tonic-gate /* 2*0Sstevel@tonic-gate * CDDL HEADER START 3*0Sstevel@tonic-gate * 4*0Sstevel@tonic-gate * The contents of this file are subject to the terms of the 5*0Sstevel@tonic-gate * Common Development and Distribution License, Version 1.0 only 6*0Sstevel@tonic-gate * (the "License"). You may not use this file except in compliance 7*0Sstevel@tonic-gate * with the License. 8*0Sstevel@tonic-gate * 9*0Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10*0Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing. 11*0Sstevel@tonic-gate * See the License for the specific language governing permissions 12*0Sstevel@tonic-gate * and limitations under the License. 13*0Sstevel@tonic-gate * 14*0Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each 15*0Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16*0Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the 17*0Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying 18*0Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner] 19*0Sstevel@tonic-gate * 20*0Sstevel@tonic-gate * CDDL HEADER END 21*0Sstevel@tonic-gate */ 22*0Sstevel@tonic-gate /* 23*0Sstevel@tonic-gate * Copyright 2000-2002 Sun Microsystems, Inc. All rights reserved. 24*0Sstevel@tonic-gate * Use is subject to license terms. 25*0Sstevel@tonic-gate */ 26*0Sstevel@tonic-gate 27*0Sstevel@tonic-gate #pragma ident "%Z%%M% %I% %E% SMI" 28*0Sstevel@tonic-gate 29*0Sstevel@tonic-gate /* 30*0Sstevel@tonic-gate * efdaemon - Emebbed Fcode Interpreter daemon. 31*0Sstevel@tonic-gate * 32*0Sstevel@tonic-gate * Opens /dev/fcode, detaches from tty and reads a request. Upon successful 33*0Sstevel@tonic-gate * return, invokes the Fcode interpreter via the shell script: 34*0Sstevel@tonic-gate * /usr/lib/efcode/efcode.sh Waits for completion of the interpreter. 35*0Sstevel@tonic-gate */ 36*0Sstevel@tonic-gate 37*0Sstevel@tonic-gate #include <stdio.h> 38*0Sstevel@tonic-gate #include <fcntl.h> 39*0Sstevel@tonic-gate #include <unistd.h> 40*0Sstevel@tonic-gate #include <stdlib.h> 41*0Sstevel@tonic-gate #include <strings.h> 42*0Sstevel@tonic-gate #include <syslog.h> 43*0Sstevel@tonic-gate #include <errno.h> 44*0Sstevel@tonic-gate #include <sys/wait.h> 45*0Sstevel@tonic-gate 46*0Sstevel@tonic-gate char efcode_sh_file[] = "/usr/lib/efcode/efcode.sh"; 47*0Sstevel@tonic-gate char dev_fcode_file[] = "/dev/fcode"; 48*0Sstevel@tonic-gate 49*0Sstevel@tonic-gate int debug = 0; 50*0Sstevel@tonic-gate 51*0Sstevel@tonic-gate int 52*0Sstevel@tonic-gate main(int argc, char **argv) 53*0Sstevel@tonic-gate { 54*0Sstevel@tonic-gate extern char *optarg; 55*0Sstevel@tonic-gate extern int optind, opterr, optopt; 56*0Sstevel@tonic-gate int c, fd, nbytes, status; 57*0Sstevel@tonic-gate char tc; 58*0Sstevel@tonic-gate pid_t pid, tpid; 59*0Sstevel@tonic-gate long nerr = 0; 60*0Sstevel@tonic-gate 61*0Sstevel@tonic-gate openlog("efdaemon", LOG_PID|LOG_CONS, LOG_DAEMON); 62*0Sstevel@tonic-gate 63*0Sstevel@tonic-gate while ((c = getopt(argc, argv, "d")) != EOF) { 64*0Sstevel@tonic-gate switch (c) { 65*0Sstevel@tonic-gate 66*0Sstevel@tonic-gate case 'd': 67*0Sstevel@tonic-gate debug++; 68*0Sstevel@tonic-gate break; 69*0Sstevel@tonic-gate 70*0Sstevel@tonic-gate case '?': 71*0Sstevel@tonic-gate syslog(LOG_ERR, "Usage: efdaemon [ -d ]\n"); 72*0Sstevel@tonic-gate exit(1); 73*0Sstevel@tonic-gate } 74*0Sstevel@tonic-gate } 75*0Sstevel@tonic-gate 76*0Sstevel@tonic-gate /* 77*0Sstevel@tonic-gate * Ensure we can open /dev/fcode 78*0Sstevel@tonic-gate */ 79*0Sstevel@tonic-gate if ((fd = open(dev_fcode_file, O_RDONLY)) < 0) { 80*0Sstevel@tonic-gate /* 81*0Sstevel@tonic-gate * Only output message if debug is on. On most systems, 82*0Sstevel@tonic-gate * /dev/fcode will not exist, so this message would pollute the 83*0Sstevel@tonic-gate * console. 84*0Sstevel@tonic-gate */ 85*0Sstevel@tonic-gate if (debug) 86*0Sstevel@tonic-gate syslog(LOG_ERR, "Can't open %s: %s\n", dev_fcode_file, 87*0Sstevel@tonic-gate strerror(errno)); 88*0Sstevel@tonic-gate exit(1); 89*0Sstevel@tonic-gate } 90*0Sstevel@tonic-gate close(fd); 91*0Sstevel@tonic-gate 92*0Sstevel@tonic-gate /* 93*0Sstevel@tonic-gate * Ensure that /usr/lib/efcode/efcode.sh exists and is executable. 94*0Sstevel@tonic-gate */ 95*0Sstevel@tonic-gate if (access(efcode_sh_file, X_OK | R_OK)) { 96*0Sstevel@tonic-gate syslog(LOG_ERR, "%s: %s\n", efcode_sh_file, strerror(errno)); 97*0Sstevel@tonic-gate exit(1); 98*0Sstevel@tonic-gate } 99*0Sstevel@tonic-gate 100*0Sstevel@tonic-gate /* 101*0Sstevel@tonic-gate * Fork a child then parent exits so we're a child of initd. 102*0Sstevel@tonic-gate */ 103*0Sstevel@tonic-gate if ((pid = fork()) < 0) { 104*0Sstevel@tonic-gate syslog(LOG_ERR, "Fork failed: %s\n", strerror(errno)); 105*0Sstevel@tonic-gate exit(1); 106*0Sstevel@tonic-gate } 107*0Sstevel@tonic-gate if (pid) 108*0Sstevel@tonic-gate exit(0); 109*0Sstevel@tonic-gate 110*0Sstevel@tonic-gate 111*0Sstevel@tonic-gate /* 112*0Sstevel@tonic-gate * detach from tty here. 113*0Sstevel@tonic-gate */ 114*0Sstevel@tonic-gate setpgrp(); 115*0Sstevel@tonic-gate close(0); 116*0Sstevel@tonic-gate close(1); 117*0Sstevel@tonic-gate close(2); 118*0Sstevel@tonic-gate (void) open("/dev/null", O_RDWR); 119*0Sstevel@tonic-gate (void) dup(0); 120*0Sstevel@tonic-gate (void) dup(0); 121*0Sstevel@tonic-gate 122*0Sstevel@tonic-gate for (;;) { 123*0Sstevel@tonic-gate while ((fd = open(dev_fcode_file, O_RDONLY)) < 0) { 124*0Sstevel@tonic-gate nerr++; 125*0Sstevel@tonic-gate if (nerr == 1) 126*0Sstevel@tonic-gate syslog(LOG_ERR, "Can't open %s: %s\n", 127*0Sstevel@tonic-gate dev_fcode_file, strerror(errno)); 128*0Sstevel@tonic-gate sleep(1); 129*0Sstevel@tonic-gate } 130*0Sstevel@tonic-gate if (nerr > 1) { 131*0Sstevel@tonic-gate syslog(LOG_ERR, "Open on %s failed %d times\n", 132*0Sstevel@tonic-gate dev_fcode_file, nerr); 133*0Sstevel@tonic-gate } 134*0Sstevel@tonic-gate nerr = 0; 135*0Sstevel@tonic-gate nbytes = read(fd, &tc, sizeof (tc)); 136*0Sstevel@tonic-gate if (nbytes < 0) { 137*0Sstevel@tonic-gate syslog(LOG_ERR, "Read of %s: %s\n", dev_fcode_file, 138*0Sstevel@tonic-gate strerror(errno)); 139*0Sstevel@tonic-gate close(fd); 140*0Sstevel@tonic-gate continue; 141*0Sstevel@tonic-gate } 142*0Sstevel@tonic-gate if (debug) 143*0Sstevel@tonic-gate syslog(LOG_DEBUG, "Got request\n"); 144*0Sstevel@tonic-gate while ((pid = fork()) < 0) { 145*0Sstevel@tonic-gate nerr++; 146*0Sstevel@tonic-gate if (nerr == 1) 147*0Sstevel@tonic-gate syslog(LOG_ERR, "Fork failed: %s\n", 148*0Sstevel@tonic-gate strerror(errno)); 149*0Sstevel@tonic-gate sleep(1); 150*0Sstevel@tonic-gate } 151*0Sstevel@tonic-gate if ((nerr > 1) && pid) { 152*0Sstevel@tonic-gate syslog(LOG_ERR, "Fork failed %d times\n", nerr); 153*0Sstevel@tonic-gate } 154*0Sstevel@tonic-gate nerr = 0; 155*0Sstevel@tonic-gate if (pid) { 156*0Sstevel@tonic-gate tpid = wait(&status); 157*0Sstevel@tonic-gate if (tpid < 0) 158*0Sstevel@tonic-gate syslog(LOG_ERR, "Wait error: %s\n", 159*0Sstevel@tonic-gate strerror(errno)); 160*0Sstevel@tonic-gate else if (pid != tpid) 161*0Sstevel@tonic-gate syslog(LOG_ERR, "Wait error, expect pid: %d" 162*0Sstevel@tonic-gate " got %d, status: %x\n", pid, tpid, status); 163*0Sstevel@tonic-gate else if (status) 164*0Sstevel@tonic-gate syslog(LOG_ERR, "Wait pid: %d status: %x\n", 165*0Sstevel@tonic-gate pid, status); 166*0Sstevel@tonic-gate else if (debug) 167*0Sstevel@tonic-gate syslog(LOG_DEBUG, "Wait: pid: %d\n", pid); 168*0Sstevel@tonic-gate close(fd); 169*0Sstevel@tonic-gate continue; 170*0Sstevel@tonic-gate } 171*0Sstevel@tonic-gate if (debug) 172*0Sstevel@tonic-gate syslog(LOG_DEBUG, "Child: %d processing request\n", 173*0Sstevel@tonic-gate getpid()); 174*0Sstevel@tonic-gate fcntl(fd, F_DUP2FD, 0); 175*0Sstevel@tonic-gate while (execl("/bin/sh", "sh", efcode_sh_file, NULL)) { 176*0Sstevel@tonic-gate nerr++; 177*0Sstevel@tonic-gate if (nerr == 1) 178*0Sstevel@tonic-gate syslog(LOG_ERR, "execl(/bin/sh) failed: %s\n", 179*0Sstevel@tonic-gate strerror(errno)); 180*0Sstevel@tonic-gate sleep(1); 181*0Sstevel@tonic-gate } 182*0Sstevel@tonic-gate } 183*0Sstevel@tonic-gate 184*0Sstevel@tonic-gate return (0); 185*0Sstevel@tonic-gate } 186