10Sstevel@tonic-gate /* 20Sstevel@tonic-gate * CDDL HEADER START 30Sstevel@tonic-gate * 40Sstevel@tonic-gate * The contents of this file are subject to the terms of the 50Sstevel@tonic-gate * Common Development and Distribution License, Version 1.0 only 60Sstevel@tonic-gate * (the "License"). You may not use this file except in compliance 70Sstevel@tonic-gate * with the License. 80Sstevel@tonic-gate * 90Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 100Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing. 110Sstevel@tonic-gate * See the License for the specific language governing permissions 120Sstevel@tonic-gate * and limitations under the License. 130Sstevel@tonic-gate * 140Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each 150Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 160Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the 170Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying 180Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner] 190Sstevel@tonic-gate * 200Sstevel@tonic-gate * CDDL HEADER END 210Sstevel@tonic-gate */ 22*1219Sraf 230Sstevel@tonic-gate /* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */ 240Sstevel@tonic-gate /* All Rights Reserved */ 250Sstevel@tonic-gate 260Sstevel@tonic-gate /* 27*1219Sraf * Copyright 2006 Sun Microsystems, Inc. All rights reserved. 280Sstevel@tonic-gate * Use is subject to license terms. 290Sstevel@tonic-gate */ 300Sstevel@tonic-gate 310Sstevel@tonic-gate #pragma ident "%Z%%M% %I% %E% SMI" 320Sstevel@tonic-gate /*LINTLIBRARY*/ 330Sstevel@tonic-gate 340Sstevel@tonic-gate /* 350Sstevel@tonic-gate * These routines are based on the standard UNIX stdio popen/pclose 360Sstevel@tonic-gate * routines. This version takes an argv[][] argument instead of a string 370Sstevel@tonic-gate * to be passed to the shell. The routine execvp() is used to call the 380Sstevel@tonic-gate * program, hence the name popenvp() and the argument types. 390Sstevel@tonic-gate * 400Sstevel@tonic-gate * This routine avoids an extra shell completely, along with not having 410Sstevel@tonic-gate * to worry about quoting conventions in strings that have spaces, 420Sstevel@tonic-gate * quotes, etc. 430Sstevel@tonic-gate */ 440Sstevel@tonic-gate 45*1219Sraf #include "c_synonyms.h" 460Sstevel@tonic-gate #include <sys/types.h> 470Sstevel@tonic-gate #include <assert.h> 480Sstevel@tonic-gate #include <string.h> 490Sstevel@tonic-gate #include "libmail.h" 500Sstevel@tonic-gate #include <sys/wait.h> 510Sstevel@tonic-gate #include <stdio.h> 520Sstevel@tonic-gate #include <fcntl.h> 530Sstevel@tonic-gate #include <signal.h> 540Sstevel@tonic-gate #include <errno.h> 550Sstevel@tonic-gate 560Sstevel@tonic-gate #define tst(a, b) (*mode == 'r'? (b) : (a)) 570Sstevel@tonic-gate #define RDR 0 580Sstevel@tonic-gate #define WTR 1 590Sstevel@tonic-gate 600Sstevel@tonic-gate #include <unistd.h> 610Sstevel@tonic-gate static pid_t popen_pid[20]; 620Sstevel@tonic-gate 630Sstevel@tonic-gate /* Functions calling popenvp() should ensure 'file' is non-NULL */ 640Sstevel@tonic-gate 650Sstevel@tonic-gate FILE * 660Sstevel@tonic-gate popenvp(char *file, char **argv, char *mode, int resetid) 670Sstevel@tonic-gate { 680Sstevel@tonic-gate int p[2]; 690Sstevel@tonic-gate int myside, yourside; 700Sstevel@tonic-gate pid_t pid; 710Sstevel@tonic-gate 720Sstevel@tonic-gate assert(file != NULL); 730Sstevel@tonic-gate if (pipe(p) < 0) 740Sstevel@tonic-gate return (NULL); 750Sstevel@tonic-gate myside = tst(p[WTR], p[RDR]); 760Sstevel@tonic-gate yourside = tst(p[RDR], p[WTR]); 770Sstevel@tonic-gate if ((pid = fork()) == 0) { 780Sstevel@tonic-gate /* myside and yourside reverse roles in child */ 790Sstevel@tonic-gate int stdio; 800Sstevel@tonic-gate 810Sstevel@tonic-gate if (resetid) { 820Sstevel@tonic-gate (void) setgid(getgid()); 830Sstevel@tonic-gate (void) setuid(getuid()); 840Sstevel@tonic-gate } 850Sstevel@tonic-gate stdio = tst(0, 1); 860Sstevel@tonic-gate (void) close(myside); 870Sstevel@tonic-gate (void) close(stdio); 880Sstevel@tonic-gate (void) fcntl(yourside, F_DUPFD, stdio); 890Sstevel@tonic-gate (void) close(yourside); 900Sstevel@tonic-gate (void) execvp(file, argv); 910Sstevel@tonic-gate (void) fprintf(stderr, "exec of \"%s\" failed: %s\n", 920Sstevel@tonic-gate file, strerror(errno)); 930Sstevel@tonic-gate (void) fflush(stderr); 940Sstevel@tonic-gate _exit(1); 950Sstevel@tonic-gate } 960Sstevel@tonic-gate if (pid == (pid_t)-1) 970Sstevel@tonic-gate return (NULL); 980Sstevel@tonic-gate popen_pid[myside] = pid; 990Sstevel@tonic-gate (void) close(yourside); 1000Sstevel@tonic-gate return (fdopen(myside, mode)); 1010Sstevel@tonic-gate } 1020Sstevel@tonic-gate 1030Sstevel@tonic-gate int 1040Sstevel@tonic-gate pclosevp(FILE *ptr) 1050Sstevel@tonic-gate { 1060Sstevel@tonic-gate int f; 1070Sstevel@tonic-gate pid_t r; 1080Sstevel@tonic-gate int status; 1090Sstevel@tonic-gate void (*hstat)(int), (*istat)(int), (*qstat)(int); 1100Sstevel@tonic-gate 1110Sstevel@tonic-gate f = fileno(ptr); 1120Sstevel@tonic-gate (void) fclose(ptr); 1130Sstevel@tonic-gate istat = signal(SIGINT, SIG_IGN); 1140Sstevel@tonic-gate qstat = signal(SIGQUIT, SIG_IGN); 1150Sstevel@tonic-gate hstat = signal(SIGHUP, SIG_IGN); 1160Sstevel@tonic-gate do 1170Sstevel@tonic-gate r = wait(&status); 1180Sstevel@tonic-gate while (r != popen_pid[f] && r != (pid_t)-1); 1190Sstevel@tonic-gate 1200Sstevel@tonic-gate if (r == (pid_t)-1) 1210Sstevel@tonic-gate status = -1; 1220Sstevel@tonic-gate (void) signal(SIGINT, istat); 1230Sstevel@tonic-gate (void) signal(SIGQUIT, qstat); 1240Sstevel@tonic-gate (void) signal(SIGHUP, hstat); 1250Sstevel@tonic-gate return (status); 1260Sstevel@tonic-gate } 127