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 * University Copyright- Copyright (c) 1982, 1986, 1988
28*0Sstevel@tonic-gate * The Regents of the University of California
29*0Sstevel@tonic-gate * All Rights Reserved
30*0Sstevel@tonic-gate *
31*0Sstevel@tonic-gate * University Acknowledgment- Portions of this document are derived from
32*0Sstevel@tonic-gate * software developed by the University of California, Berkeley, and its
33*0Sstevel@tonic-gate * contributors.
34*0Sstevel@tonic-gate */
35*0Sstevel@tonic-gate
36*0Sstevel@tonic-gate #pragma ident "%Z%%M% %I% %E% SMI"
37*0Sstevel@tonic-gate
38*0Sstevel@tonic-gate /*
39*0Sstevel@tonic-gate * mailx -- a modified version of a University of California at Berkeley
40*0Sstevel@tonic-gate * mail program
41*0Sstevel@tonic-gate *
42*0Sstevel@tonic-gate * npopen() and npclose()
43*0Sstevel@tonic-gate *
44*0Sstevel@tonic-gate * stolen from C library, modified to use SHELL variable
45*0Sstevel@tonic-gate */
46*0Sstevel@tonic-gate
47*0Sstevel@tonic-gate
48*0Sstevel@tonic-gate #include <stdio.h>
49*0Sstevel@tonic-gate #include <signal.h>
50*0Sstevel@tonic-gate #include <fcntl.h>
51*0Sstevel@tonic-gate
52*0Sstevel@tonic-gate #define tst(a,b) (*mode == 'r'? (b) : (a))
53*0Sstevel@tonic-gate #define RDR 0
54*0Sstevel@tonic-gate #define WTR 1
55*0Sstevel@tonic-gate
56*0Sstevel@tonic-gate #ifdef VMUNIX
57*0Sstevel@tonic-gate #define sigset signal
58*0Sstevel@tonic-gate #else
59*0Sstevel@tonic-gate extern void (*sigset())();
60*0Sstevel@tonic-gate #endif
61*0Sstevel@tonic-gate #ifdef preSVr4
62*0Sstevel@tonic-gate extern FILE *fdopen();
63*0Sstevel@tonic-gate extern int execlp(), fork(), pipe(), close(), fcntl();
64*0Sstevel@tonic-gate #ifndef sun
65*0Sstevel@tonic-gate typedef int pid_t;
66*0Sstevel@tonic-gate #endif
67*0Sstevel@tonic-gate #else
68*0Sstevel@tonic-gate # include <unistd.h>
69*0Sstevel@tonic-gate # include <wait.h>
70*0Sstevel@tonic-gate #endif
71*0Sstevel@tonic-gate static pid_t popen_pid[20];
72*0Sstevel@tonic-gate
73*0Sstevel@tonic-gate FILE *
npopen(char * cmd,char * mode)74*0Sstevel@tonic-gate npopen(char *cmd, char *mode)
75*0Sstevel@tonic-gate {
76*0Sstevel@tonic-gate int p[2];
77*0Sstevel@tonic-gate register pid_t pid;
78*0Sstevel@tonic-gate register int myside, yourside;
79*0Sstevel@tonic-gate char *Shell, *value(char *);
80*0Sstevel@tonic-gate
81*0Sstevel@tonic-gate if ((Shell = value("SHELL")) == NULL || *Shell=='\0')
82*0Sstevel@tonic-gate #ifdef preSVr4
83*0Sstevel@tonic-gate Shell = "/bin/sh";
84*0Sstevel@tonic-gate #else
85*0Sstevel@tonic-gate Shell = "/usr/bin/sh";
86*0Sstevel@tonic-gate #endif
87*0Sstevel@tonic-gate if(pipe(p) < 0)
88*0Sstevel@tonic-gate return(NULL);
89*0Sstevel@tonic-gate myside = tst(p[WTR], p[RDR]);
90*0Sstevel@tonic-gate yourside = tst(p[RDR], p[WTR]);
91*0Sstevel@tonic-gate if((pid = fork()) == 0) {
92*0Sstevel@tonic-gate /* myside and yourside reverse roles in child */
93*0Sstevel@tonic-gate int stdio;
94*0Sstevel@tonic-gate
95*0Sstevel@tonic-gate stdio = tst(0, 1);
96*0Sstevel@tonic-gate (void) close(myside);
97*0Sstevel@tonic-gate (void) close(stdio);
98*0Sstevel@tonic-gate (void) fcntl(yourside, 0, stdio);
99*0Sstevel@tonic-gate (void) close(yourside);
100*0Sstevel@tonic-gate (void) execlp(Shell, Shell, "-c", cmd, (char *)0);
101*0Sstevel@tonic-gate perror(Shell);
102*0Sstevel@tonic-gate _exit(1);
103*0Sstevel@tonic-gate }
104*0Sstevel@tonic-gate if(pid == (pid_t)-1)
105*0Sstevel@tonic-gate return(NULL);
106*0Sstevel@tonic-gate popen_pid[myside] = pid;
107*0Sstevel@tonic-gate (void) close(yourside);
108*0Sstevel@tonic-gate return(fdopen(myside, mode));
109*0Sstevel@tonic-gate }
110*0Sstevel@tonic-gate
111*0Sstevel@tonic-gate int
npclose(FILE * ptr)112*0Sstevel@tonic-gate npclose(FILE *ptr)
113*0Sstevel@tonic-gate {
114*0Sstevel@tonic-gate register int f;
115*0Sstevel@tonic-gate register pid_t r;
116*0Sstevel@tonic-gate int status;
117*0Sstevel@tonic-gate void (*istat)(int), (*qstat)(int);
118*0Sstevel@tonic-gate
119*0Sstevel@tonic-gate f = fileno(ptr);
120*0Sstevel@tonic-gate (void) fclose(ptr);
121*0Sstevel@tonic-gate istat = sigset(SIGINT, SIG_IGN);
122*0Sstevel@tonic-gate qstat = sigset(SIGQUIT, SIG_IGN);
123*0Sstevel@tonic-gate while((r = wait(&status)) != popen_pid[f] && r != (pid_t)-1)
124*0Sstevel@tonic-gate ;
125*0Sstevel@tonic-gate if(r == (pid_t)-1)
126*0Sstevel@tonic-gate status = -1;
127*0Sstevel@tonic-gate (void) sigset(SIGINT, istat);
128*0Sstevel@tonic-gate (void) sigset(SIGQUIT, qstat);
129*0Sstevel@tonic-gate return(status);
130*0Sstevel@tonic-gate }
131