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 (c) 1984, 1986, 1987, 1988, 1989 AT&T */ 23*0Sstevel@tonic-gate /* All Rights Reserved */ 24*0Sstevel@tonic-gate 25*0Sstevel@tonic-gate 26*0Sstevel@tonic-gate /* 27*0Sstevel@tonic-gate * Copyright 2005 Sun Microsystems, Inc. All rights reserved. 28*0Sstevel@tonic-gate * Use is subject to license terms. 29*0Sstevel@tonic-gate */ 30*0Sstevel@tonic-gate 31*0Sstevel@tonic-gate #pragma ident "%Z%%M% %I% %E% SMI" 32*0Sstevel@tonic-gate /*LINTLIBRARY*/ 33*0Sstevel@tonic-gate 34*0Sstevel@tonic-gate /* 35*0Sstevel@tonic-gate * These routines are based on the standard UNIX stdio popen/pclose 36*0Sstevel@tonic-gate * routines. This version takes an argv[][] argument instead of a string 37*0Sstevel@tonic-gate * to be passed to the shell. The routine execvp() is used to call the 38*0Sstevel@tonic-gate * program, hence the name popenvp() and the argument types. 39*0Sstevel@tonic-gate * 40*0Sstevel@tonic-gate * This routine avoids an extra shell completely, along with not having 41*0Sstevel@tonic-gate * to worry about quoting conventions in strings that have spaces, 42*0Sstevel@tonic-gate * quotes, etc. 43*0Sstevel@tonic-gate */ 44*0Sstevel@tonic-gate 45*0Sstevel@tonic-gate #include "synonyms.h" 46*0Sstevel@tonic-gate #include <sys/types.h> 47*0Sstevel@tonic-gate #include <assert.h> 48*0Sstevel@tonic-gate #include <string.h> 49*0Sstevel@tonic-gate #include "libmail.h" 50*0Sstevel@tonic-gate #include <sys/wait.h> 51*0Sstevel@tonic-gate #include <stdio.h> 52*0Sstevel@tonic-gate #include <fcntl.h> 53*0Sstevel@tonic-gate #include <signal.h> 54*0Sstevel@tonic-gate #include <errno.h> 55*0Sstevel@tonic-gate 56*0Sstevel@tonic-gate #define tst(a, b) (*mode == 'r'? (b) : (a)) 57*0Sstevel@tonic-gate #define RDR 0 58*0Sstevel@tonic-gate #define WTR 1 59*0Sstevel@tonic-gate 60*0Sstevel@tonic-gate #include <unistd.h> 61*0Sstevel@tonic-gate static pid_t popen_pid[20]; 62*0Sstevel@tonic-gate 63*0Sstevel@tonic-gate /* Functions calling popenvp() should ensure 'file' is non-NULL */ 64*0Sstevel@tonic-gate 65*0Sstevel@tonic-gate FILE * 66*0Sstevel@tonic-gate popenvp(char *file, char **argv, char *mode, int resetid) 67*0Sstevel@tonic-gate { 68*0Sstevel@tonic-gate int p[2]; 69*0Sstevel@tonic-gate int myside, yourside; 70*0Sstevel@tonic-gate pid_t pid; 71*0Sstevel@tonic-gate 72*0Sstevel@tonic-gate assert(file != NULL); 73*0Sstevel@tonic-gate if (pipe(p) < 0) 74*0Sstevel@tonic-gate return (NULL); 75*0Sstevel@tonic-gate myside = tst(p[WTR], p[RDR]); 76*0Sstevel@tonic-gate yourside = tst(p[RDR], p[WTR]); 77*0Sstevel@tonic-gate if ((pid = fork()) == 0) { 78*0Sstevel@tonic-gate /* myside and yourside reverse roles in child */ 79*0Sstevel@tonic-gate int stdio; 80*0Sstevel@tonic-gate 81*0Sstevel@tonic-gate if (resetid) { 82*0Sstevel@tonic-gate (void) setgid(getgid()); 83*0Sstevel@tonic-gate (void) setuid(getuid()); 84*0Sstevel@tonic-gate } 85*0Sstevel@tonic-gate stdio = tst(0, 1); 86*0Sstevel@tonic-gate (void) close(myside); 87*0Sstevel@tonic-gate (void) close(stdio); 88*0Sstevel@tonic-gate (void) fcntl(yourside, F_DUPFD, stdio); 89*0Sstevel@tonic-gate (void) close(yourside); 90*0Sstevel@tonic-gate (void) execvp(file, argv); 91*0Sstevel@tonic-gate (void) fprintf(stderr, "exec of \"%s\" failed: %s\n", 92*0Sstevel@tonic-gate file, strerror(errno)); 93*0Sstevel@tonic-gate (void) fflush(stderr); 94*0Sstevel@tonic-gate _exit(1); 95*0Sstevel@tonic-gate } 96*0Sstevel@tonic-gate if (pid == (pid_t)-1) 97*0Sstevel@tonic-gate return (NULL); 98*0Sstevel@tonic-gate popen_pid[myside] = pid; 99*0Sstevel@tonic-gate (void) close(yourside); 100*0Sstevel@tonic-gate return (fdopen(myside, mode)); 101*0Sstevel@tonic-gate } 102*0Sstevel@tonic-gate 103*0Sstevel@tonic-gate int 104*0Sstevel@tonic-gate pclosevp(FILE *ptr) 105*0Sstevel@tonic-gate { 106*0Sstevel@tonic-gate int f; 107*0Sstevel@tonic-gate pid_t r; 108*0Sstevel@tonic-gate int status; 109*0Sstevel@tonic-gate void (*hstat)(int), (*istat)(int), (*qstat)(int); 110*0Sstevel@tonic-gate 111*0Sstevel@tonic-gate f = fileno(ptr); 112*0Sstevel@tonic-gate (void) fclose(ptr); 113*0Sstevel@tonic-gate istat = signal(SIGINT, SIG_IGN); 114*0Sstevel@tonic-gate qstat = signal(SIGQUIT, SIG_IGN); 115*0Sstevel@tonic-gate hstat = signal(SIGHUP, SIG_IGN); 116*0Sstevel@tonic-gate do 117*0Sstevel@tonic-gate r = wait(&status); 118*0Sstevel@tonic-gate while (r != popen_pid[f] && r != (pid_t)-1); 119*0Sstevel@tonic-gate 120*0Sstevel@tonic-gate if (r == (pid_t)-1) 121*0Sstevel@tonic-gate status = -1; 122*0Sstevel@tonic-gate (void) signal(SIGINT, istat); 123*0Sstevel@tonic-gate (void) signal(SIGQUIT, qstat); 124*0Sstevel@tonic-gate (void) signal(SIGHUP, hstat); 125*0Sstevel@tonic-gate return (status); 126*0Sstevel@tonic-gate } 127