1ea022d16SRodney W. Grimes /* 2ea022d16SRodney W. Grimes * Copyright (c) 1988, 1993, 1994 3ea022d16SRodney W. Grimes * The Regents of the University of California. All rights reserved. 4ea022d16SRodney W. Grimes * 5ea022d16SRodney W. Grimes * This code is derived from software written by Ken Arnold and 6ea022d16SRodney W. Grimes * published in UNIX Review, Vol. 6, No. 8. 7ea022d16SRodney W. Grimes * 8ea022d16SRodney W. Grimes * Redistribution and use in source and binary forms, with or without 9ea022d16SRodney W. Grimes * modification, are permitted provided that the following conditions 10ea022d16SRodney W. Grimes * are met: 11ea022d16SRodney W. Grimes * 1. Redistributions of source code must retain the above copyright 12ea022d16SRodney W. Grimes * notice, this list of conditions and the following disclaimer. 13ea022d16SRodney W. Grimes * 2. Redistributions in binary form must reproduce the above copyright 14ea022d16SRodney W. Grimes * notice, this list of conditions and the following disclaimer in the 15ea022d16SRodney W. Grimes * documentation and/or other materials provided with the distribution. 16ea022d16SRodney W. Grimes * 3. All advertising materials mentioning features or use of this software 17ea022d16SRodney W. Grimes * must display the following acknowledgement: 18ea022d16SRodney W. Grimes * This product includes software developed by the University of 19ea022d16SRodney W. Grimes * California, Berkeley and its contributors. 20ea022d16SRodney W. Grimes * 4. Neither the name of the University nor the names of its contributors 21ea022d16SRodney W. Grimes * may be used to endorse or promote products derived from this software 22ea022d16SRodney W. Grimes * without specific prior written permission. 23ea022d16SRodney W. Grimes * 24ea022d16SRodney W. Grimes * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25ea022d16SRodney W. Grimes * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26ea022d16SRodney W. Grimes * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27ea022d16SRodney W. Grimes * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28ea022d16SRodney W. Grimes * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29ea022d16SRodney W. Grimes * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30ea022d16SRodney W. Grimes * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31ea022d16SRodney W. Grimes * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32ea022d16SRodney W. Grimes * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33ea022d16SRodney W. Grimes * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34ea022d16SRodney W. Grimes * SUCH DAMAGE. 35ea022d16SRodney W. Grimes * 36148531efSWolfram Schneider * $Id$ 37ea022d16SRodney W. Grimes */ 38148531efSWolfram Schneider 399aca17cbSMark Murray #if 0 40ea022d16SRodney W. Grimes #ifndef lint 41ea022d16SRodney W. Grimes static char sccsid[] = "@(#)popen.c 8.3 (Berkeley) 4/6/94"; 42ea022d16SRodney W. Grimes #endif /* not lint */ 439aca17cbSMark Murray #endif 44ea022d16SRodney W. Grimes 45ea022d16SRodney W. Grimes #include <sys/types.h> 46ea022d16SRodney W. Grimes #include <sys/wait.h> 47ea022d16SRodney W. Grimes 48ea022d16SRodney W. Grimes #include <errno.h> 49ea022d16SRodney W. Grimes #include <glob.h> 50ea022d16SRodney W. Grimes #include <signal.h> 51ea022d16SRodney W. Grimes #include <stdio.h> 52ea022d16SRodney W. Grimes #include <stdlib.h> 53ea022d16SRodney W. Grimes #include <string.h> 54ea022d16SRodney W. Grimes #include <unistd.h> 55ea022d16SRodney W. Grimes 56ea022d16SRodney W. Grimes #include "extern.h" 57ea022d16SRodney W. Grimes 58ea022d16SRodney W. Grimes /* 59ea022d16SRodney W. Grimes * Special version of popen which avoids call to shell. This ensures noone 60ea022d16SRodney W. Grimes * may create a pipe to a hidden program as a side effect of a list or dir 61ea022d16SRodney W. Grimes * command. 62ea022d16SRodney W. Grimes */ 63ea022d16SRodney W. Grimes static int *pids; 64ea022d16SRodney W. Grimes static int fds; 65ea022d16SRodney W. Grimes 66ea022d16SRodney W. Grimes FILE * 67ea022d16SRodney W. Grimes ftpd_popen(program, type) 68ea022d16SRodney W. Grimes char *program, *type; 69ea022d16SRodney W. Grimes { 70ea022d16SRodney W. Grimes char *cp; 71ea022d16SRodney W. Grimes FILE *iop; 72ea022d16SRodney W. Grimes int argc, gargc, pdes[2], pid; 73ea022d16SRodney W. Grimes char **pop, *argv[100], *gargv[1000]; 74ea022d16SRodney W. Grimes 7539ea627dSPaul Traina if (((*type != 'r') && (*type != 'w')) || type[1]) 76ea022d16SRodney W. Grimes return (NULL); 77ea022d16SRodney W. Grimes 78ea022d16SRodney W. Grimes if (!pids) { 79ea022d16SRodney W. Grimes if ((fds = getdtablesize()) <= 0) 80ea022d16SRodney W. Grimes return (NULL); 81ea022d16SRodney W. Grimes if ((pids = (int *)malloc((u_int)(fds * sizeof(int)))) == NULL) 82ea022d16SRodney W. Grimes return (NULL); 83ea022d16SRodney W. Grimes memset(pids, 0, fds * sizeof(int)); 84ea022d16SRodney W. Grimes } 85ea022d16SRodney W. Grimes if (pipe(pdes) < 0) 86ea022d16SRodney W. Grimes return (NULL); 87ea022d16SRodney W. Grimes 88ea022d16SRodney W. Grimes /* break up string into pieces */ 89ea022d16SRodney W. Grimes for (argc = 0, cp = program;; cp = NULL) 90ea022d16SRodney W. Grimes if (!(argv[argc++] = strtok(cp, " \t\n"))) 91ea022d16SRodney W. Grimes break; 92ea022d16SRodney W. Grimes 93ea022d16SRodney W. Grimes /* glob each piece */ 94ea022d16SRodney W. Grimes gargv[0] = argv[0]; 95ea022d16SRodney W. Grimes for (gargc = argc = 1; argv[argc]; argc++) { 96ea022d16SRodney W. Grimes glob_t gl; 97ea022d16SRodney W. Grimes int flags = GLOB_BRACE|GLOB_NOCHECK|GLOB_QUOTE|GLOB_TILDE; 98ea022d16SRodney W. Grimes 99ea022d16SRodney W. Grimes memset(&gl, 0, sizeof(gl)); 100ea022d16SRodney W. Grimes if (glob(argv[argc], flags, NULL, &gl)) 101ea022d16SRodney W. Grimes gargv[gargc++] = strdup(argv[argc]); 102ea022d16SRodney W. Grimes else 103ea022d16SRodney W. Grimes for (pop = gl.gl_pathv; *pop; pop++) 104ea022d16SRodney W. Grimes gargv[gargc++] = strdup(*pop); 105ea022d16SRodney W. Grimes globfree(&gl); 106ea022d16SRodney W. Grimes } 107ea022d16SRodney W. Grimes gargv[gargc] = NULL; 108ea022d16SRodney W. Grimes 109ea022d16SRodney W. Grimes iop = NULL; 110ea022d16SRodney W. Grimes switch(pid = vfork()) { 111ea022d16SRodney W. Grimes case -1: /* error */ 112ea022d16SRodney W. Grimes (void)close(pdes[0]); 113ea022d16SRodney W. Grimes (void)close(pdes[1]); 114ea022d16SRodney W. Grimes goto pfree; 115ea022d16SRodney W. Grimes /* NOTREACHED */ 116ea022d16SRodney W. Grimes case 0: /* child */ 117ea022d16SRodney W. Grimes if (*type == 'r') { 118ea022d16SRodney W. Grimes if (pdes[1] != STDOUT_FILENO) { 119ea022d16SRodney W. Grimes dup2(pdes[1], STDOUT_FILENO); 120ea022d16SRodney W. Grimes (void)close(pdes[1]); 121ea022d16SRodney W. Grimes } 122ea022d16SRodney W. Grimes dup2(STDOUT_FILENO, STDERR_FILENO); /* stderr too! */ 123ea022d16SRodney W. Grimes (void)close(pdes[0]); 124ea022d16SRodney W. Grimes } else { 125ea022d16SRodney W. Grimes if (pdes[0] != STDIN_FILENO) { 126ea022d16SRodney W. Grimes dup2(pdes[0], STDIN_FILENO); 127ea022d16SRodney W. Grimes (void)close(pdes[0]); 128ea022d16SRodney W. Grimes } 129ea022d16SRodney W. Grimes (void)close(pdes[1]); 130ea022d16SRodney W. Grimes } 131ea022d16SRodney W. Grimes execv(gargv[0], gargv); 132ea022d16SRodney W. Grimes _exit(1); 133ea022d16SRodney W. Grimes } 134ea022d16SRodney W. Grimes /* parent; assume fdopen can't fail... */ 135ea022d16SRodney W. Grimes if (*type == 'r') { 136ea022d16SRodney W. Grimes iop = fdopen(pdes[0], type); 137ea022d16SRodney W. Grimes (void)close(pdes[1]); 138ea022d16SRodney W. Grimes } else { 139ea022d16SRodney W. Grimes iop = fdopen(pdes[1], type); 140ea022d16SRodney W. Grimes (void)close(pdes[0]); 141ea022d16SRodney W. Grimes } 142ea022d16SRodney W. Grimes pids[fileno(iop)] = pid; 143ea022d16SRodney W. Grimes 144ea022d16SRodney W. Grimes pfree: for (argc = 1; gargv[argc] != NULL; argc++) 145ea022d16SRodney W. Grimes free(gargv[argc]); 146ea022d16SRodney W. Grimes 147ea022d16SRodney W. Grimes return (iop); 148ea022d16SRodney W. Grimes } 149ea022d16SRodney W. Grimes 150ea022d16SRodney W. Grimes int 151ea022d16SRodney W. Grimes ftpd_pclose(iop) 152ea022d16SRodney W. Grimes FILE *iop; 153ea022d16SRodney W. Grimes { 154ea022d16SRodney W. Grimes int fdes, omask, status; 155ea022d16SRodney W. Grimes pid_t pid; 156ea022d16SRodney W. Grimes 157ea022d16SRodney W. Grimes /* 158ea022d16SRodney W. Grimes * pclose returns -1 if stream is not associated with a 159ea022d16SRodney W. Grimes * `popened' command, or, if already `pclosed'. 160ea022d16SRodney W. Grimes */ 161ea022d16SRodney W. Grimes if (pids == 0 || pids[fdes = fileno(iop)] == 0) 162ea022d16SRodney W. Grimes return (-1); 163ea022d16SRodney W. Grimes (void)fclose(iop); 164ea022d16SRodney W. Grimes omask = sigblock(sigmask(SIGINT)|sigmask(SIGQUIT)|sigmask(SIGHUP)); 165ea022d16SRodney W. Grimes while ((pid = waitpid(pids[fdes], &status, 0)) < 0 && errno == EINTR) 166ea022d16SRodney W. Grimes continue; 167ea022d16SRodney W. Grimes (void)sigsetmask(omask); 168ea022d16SRodney W. Grimes pids[fdes] = 0; 169ea022d16SRodney W. Grimes if (pid < 0) 170ea022d16SRodney W. Grimes return (pid); 171ea022d16SRodney W. Grimes if (WIFEXITED(status)) 172ea022d16SRodney W. Grimes return (WEXITSTATUS(status)); 173ea022d16SRodney W. Grimes return (1); 174ea022d16SRodney W. Grimes } 175