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 * Copyright 1985 Sun Microsystems, Inc. All rights reserved. 23*0Sstevel@tonic-gate * Use is subject to license terms. 24*0Sstevel@tonic-gate */ 25*0Sstevel@tonic-gate 26*0Sstevel@tonic-gate #pragma ident "%Z%%M% %I% %E% SMI" 27*0Sstevel@tonic-gate 28*0Sstevel@tonic-gate 29*0Sstevel@tonic-gate /* 30*0Sstevel@tonic-gate * under.c - program to execute a command under a given directory 31*0Sstevel@tonic-gate * 32*0Sstevel@tonic-gate */ 33*0Sstevel@tonic-gate 34*0Sstevel@tonic-gate #include <errno.h> 35*0Sstevel@tonic-gate #include <signal.h> 36*0Sstevel@tonic-gate #include <stdio.h> 37*0Sstevel@tonic-gate #include <stdlib.h> 38*0Sstevel@tonic-gate #include <string.h> 39*0Sstevel@tonic-gate 40*0Sstevel@tonic-gate #include <rpc/rpc.h> 41*0Sstevel@tonic-gate #include <nfs/nfs.h> 42*0Sstevel@tonic-gate #include <rpcsvc/mount.h> 43*0Sstevel@tonic-gate #include <sys/time.h> 44*0Sstevel@tonic-gate 45*0Sstevel@tonic-gate static char **Argv; /* saved argument vector (for ps) */ 46*0Sstevel@tonic-gate static char *LastArgv; /* saved end-of-argument vector */ 47*0Sstevel@tonic-gate 48*0Sstevel@tonic-gate int Debug = 0; 49*0Sstevel@tonic-gate 50*0Sstevel@tonic-gate int child = 0; /* pid of the executed process */ 51*0Sstevel@tonic-gate int ChildDied = 0; /* true when above is valid */ 52*0Sstevel@tonic-gate int HasHelper = 0; /* must kill helpers (interactive mode) */ 53*0Sstevel@tonic-gate time_t time_now; 54*0Sstevel@tonic-gate /* 55*0Sstevel@tonic-gate * SETPROCTITLE -- set the title of this process for "ps" 56*0Sstevel@tonic-gate * 57*0Sstevel@tonic-gate * Does nothing if there were not enough arguments on the command 58*0Sstevel@tonic-gate * line for the information. 59*0Sstevel@tonic-gate * 60*0Sstevel@tonic-gate * Side Effects: 61*0Sstevel@tonic-gate * Clobbers argv[] of our main procedure. 62*0Sstevel@tonic-gate */ 63*0Sstevel@tonic-gate void 64*0Sstevel@tonic-gate setproctitle(user, host) 65*0Sstevel@tonic-gate char *user, *host; 66*0Sstevel@tonic-gate { 67*0Sstevel@tonic-gate register char *tohere; 68*0Sstevel@tonic-gate 69*0Sstevel@tonic-gate tohere = Argv[0]; 70*0Sstevel@tonic-gate if ((int)(LastArgv == (char *)NULL) || 71*0Sstevel@tonic-gate (int)(strlen(user)+strlen(host)+3) > (int)(LastArgv - tohere)) 72*0Sstevel@tonic-gate return; 73*0Sstevel@tonic-gate *tohere++ = '-'; /* So ps prints (rpc.rexd) */ 74*0Sstevel@tonic-gate sprintf(tohere, "%s@%s", user, host); 75*0Sstevel@tonic-gate while (*tohere++) /* Skip to end of printf output */ 76*0Sstevel@tonic-gate ; 77*0Sstevel@tonic-gate while (tohere < LastArgv) /* Avoid confusing ps */ 78*0Sstevel@tonic-gate *tohere++ = ' '; 79*0Sstevel@tonic-gate } 80*0Sstevel@tonic-gate 81*0Sstevel@tonic-gate 82*0Sstevel@tonic-gate void 83*0Sstevel@tonic-gate main(argc, argv) 84*0Sstevel@tonic-gate int argc; 85*0Sstevel@tonic-gate char **argv; 86*0Sstevel@tonic-gate { 87*0Sstevel@tonic-gate static char usage[] = "Usage: under [-d] dir command...\n"; 88*0Sstevel@tonic-gate char *dir, *p; 89*0Sstevel@tonic-gate char hostname[255]; 90*0Sstevel@tonic-gate char *tmpdir, *subdir, *parsefs(); 91*0Sstevel@tonic-gate char dirbuf[1024]; 92*0Sstevel@tonic-gate char error[1024]; 93*0Sstevel@tonic-gate int status; 94*0Sstevel@tonic-gate int len; 95*0Sstevel@tonic-gate 96*0Sstevel@tonic-gate if (argc < 3) 97*0Sstevel@tonic-gate { 98*0Sstevel@tonic-gate fprintf(stderr, usage); 99*0Sstevel@tonic-gate exit(1); 100*0Sstevel@tonic-gate } 101*0Sstevel@tonic-gate 102*0Sstevel@tonic-gate /* 103*0Sstevel@tonic-gate * argv start and extent for setproctitle() 104*0Sstevel@tonic-gate */ 105*0Sstevel@tonic-gate Argv = argv; 106*0Sstevel@tonic-gate if (argc > 0) 107*0Sstevel@tonic-gate LastArgv = argv[argc-1] + strlen(argv[argc-1]); 108*0Sstevel@tonic-gate else 109*0Sstevel@tonic-gate LastArgv = NULL; 110*0Sstevel@tonic-gate 111*0Sstevel@tonic-gate gethostname(hostname, 255); 112*0Sstevel@tonic-gate strcat(hostname, ":/"); 113*0Sstevel@tonic-gate len = strlen(hostname); 114*0Sstevel@tonic-gate if ( strcmp( argv[1], "-d" ) == 0 ) 115*0Sstevel@tonic-gate { 116*0Sstevel@tonic-gate Debug = 1; 117*0Sstevel@tonic-gate argv++; 118*0Sstevel@tonic-gate } 119*0Sstevel@tonic-gate dir = argv[1]; 120*0Sstevel@tonic-gate if ( (int)strlen(dir) > len && (int)strncmp(dir, hostname, len) == 0) 121*0Sstevel@tonic-gate dir = strchr(dir, ':') + 1; 122*0Sstevel@tonic-gate else if (p = strchr(dir, ':')) 123*0Sstevel@tonic-gate { 124*0Sstevel@tonic-gate if (p[1] != '/') 125*0Sstevel@tonic-gate { 126*0Sstevel@tonic-gate fprintf(stderr, "under: %s invalid name\n", dir); 127*0Sstevel@tonic-gate exit(1); 128*0Sstevel@tonic-gate } 129*0Sstevel@tonic-gate 130*0Sstevel@tonic-gate tmpdir = mktemp("/tmp/underXXXXXX"); 131*0Sstevel@tonic-gate 132*0Sstevel@tonic-gate if ( Debug && errno ) 133*0Sstevel@tonic-gate { 134*0Sstevel@tonic-gate if ( errno != ENOENT ) 135*0Sstevel@tonic-gate printf("mktemp of %s returned %d %s\n", 136*0Sstevel@tonic-gate tmpdir, errno, strerror(errno)); 137*0Sstevel@tonic-gate } 138*0Sstevel@tonic-gate errno = 0; /* XXX access() call in mktemp sets errno = ENOENT */ 139*0Sstevel@tonic-gate 140*0Sstevel@tonic-gate if (mkdir(tmpdir, 0777)) 141*0Sstevel@tonic-gate { 142*0Sstevel@tonic-gate perror(tmpdir); 143*0Sstevel@tonic-gate exit(1); 144*0Sstevel@tonic-gate } 145*0Sstevel@tonic-gate 146*0Sstevel@tonic-gate if ( Debug && errno ) 147*0Sstevel@tonic-gate printf("mkdir of %s returned %d %s\n", 148*0Sstevel@tonic-gate tmpdir, errno, strerror(errno)); 149*0Sstevel@tonic-gate 150*0Sstevel@tonic-gate subdir = parsefs(dir, error); 151*0Sstevel@tonic-gate if (subdir == NULL) 152*0Sstevel@tonic-gate { 153*0Sstevel@tonic-gate exit(1); 154*0Sstevel@tonic-gate } 155*0Sstevel@tonic-gate time_now = time((long *) 0); 156*0Sstevel@tonic-gate if (mount_nfs(dir, tmpdir, error)) 157*0Sstevel@tonic-gate { 158*0Sstevel@tonic-gate exit(1); 159*0Sstevel@tonic-gate } 160*0Sstevel@tonic-gate strcpy(dirbuf, tmpdir); 161*0Sstevel@tonic-gate strcat(dirbuf, "/"); 162*0Sstevel@tonic-gate strcat(dirbuf, subdir); 163*0Sstevel@tonic-gate status = runcmd(dirbuf, argv[2], &argv[2]); 164*0Sstevel@tonic-gate if (umount_nfs(dir, tmpdir)) 165*0Sstevel@tonic-gate fprintf(stderr, "under: couldn't umount %s\n", dir); 166*0Sstevel@tonic-gate rmdir(tmpdir); 167*0Sstevel@tonic-gate exit(status); 168*0Sstevel@tonic-gate } 169*0Sstevel@tonic-gate 170*0Sstevel@tonic-gate setgid(getgid()); 171*0Sstevel@tonic-gate setuid(getuid()); 172*0Sstevel@tonic-gate if (chdir(dir)) 173*0Sstevel@tonic-gate { 174*0Sstevel@tonic-gate perror(dir); 175*0Sstevel@tonic-gate exit(1); 176*0Sstevel@tonic-gate } 177*0Sstevel@tonic-gate execvp(argv[2], &argv[2]); 178*0Sstevel@tonic-gate perror(argv[2]); 179*0Sstevel@tonic-gate exit(1); 180*0Sstevel@tonic-gate /* NOTREACHED */ 181*0Sstevel@tonic-gate } 182*0Sstevel@tonic-gate 183*0Sstevel@tonic-gate typedef void (*sig_t)(); 184*0Sstevel@tonic-gate 185*0Sstevel@tonic-gate int 186*0Sstevel@tonic-gate runcmd(dir, cmd, args) 187*0Sstevel@tonic-gate char *dir; 188*0Sstevel@tonic-gate char *cmd; 189*0Sstevel@tonic-gate char **args; 190*0Sstevel@tonic-gate { 191*0Sstevel@tonic-gate int pid, child, status; 192*0Sstevel@tonic-gate sig_t sigint, sigquit; 193*0Sstevel@tonic-gate 194*0Sstevel@tonic-gate sigint = sigset(SIGINT, SIG_IGN); 195*0Sstevel@tonic-gate sigquit = sigset(SIGQUIT, SIG_IGN); 196*0Sstevel@tonic-gate pid = fork(); 197*0Sstevel@tonic-gate if (pid == -1) 198*0Sstevel@tonic-gate return (0177); 199*0Sstevel@tonic-gate if (pid == 0) 200*0Sstevel@tonic-gate { 201*0Sstevel@tonic-gate setgid(getgid()); 202*0Sstevel@tonic-gate setuid(getuid()); 203*0Sstevel@tonic-gate if (chdir(dir)) 204*0Sstevel@tonic-gate { 205*0Sstevel@tonic-gate perror(dir); 206*0Sstevel@tonic-gate exit(1); 207*0Sstevel@tonic-gate } 208*0Sstevel@tonic-gate (void) sigset(SIGINT, sigint); 209*0Sstevel@tonic-gate (void) sigset(SIGQUIT, sigquit); 210*0Sstevel@tonic-gate execvp(cmd, args); 211*0Sstevel@tonic-gate perror(cmd); 212*0Sstevel@tonic-gate exit(1); 213*0Sstevel@tonic-gate } 214*0Sstevel@tonic-gate while ((child = wait(&status)) != pid && child != -1) 215*0Sstevel@tonic-gate ; 216*0Sstevel@tonic-gate (void) sigset(SIGINT, sigint); 217*0Sstevel@tonic-gate (void) sigset(SIGQUIT, sigquit); 218*0Sstevel@tonic-gate if (child == -1) 219*0Sstevel@tonic-gate return (0177); 220*0Sstevel@tonic-gate if (status & 0377) 221*0Sstevel@tonic-gate return (status & 0377); 222*0Sstevel@tonic-gate return ((status >> 8) & 0377); 223*0Sstevel@tonic-gate } 224