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📁 ..
📄 Makefile.inc(11.75 KB)
📄 Symbol.map(8.61 KB)
📄 __getosreldate.c(2.34 KB)
📄 __pthread_mutex_init_calloc_cb_stub.c(1.78 KB)
📄 __xuname.c(3.54 KB)
📄 _once_stub.c(2.45 KB)
📄 _pthread_stubs.c(13.83 KB)
📄 _rand48.c(1.37 KB)
📄 _spinlock_stub.c(2.33 KB)
📄 _thread_init.c(1.74 KB)
📄 alarm.3(2.8 KB)
📄 alarm.c(2.1 KB)
📄 arc4random-compat.c(2.35 KB)
📄 arc4random.3(4.78 KB)
📄 arc4random.c(5.87 KB)
📄 arc4random.h(4.11 KB)
📄 arc4random_uniform.c(1.77 KB)
📄 assert.c(2.12 KB)
📄 auxv.3(3.28 KB)
📄 auxv.c(8.11 KB)
📄 basename.3(2.22 KB)
📄 basename.c(1.91 KB)
📄 basename_compat.c(2.18 KB)
📄 cap_rights_get.3(3.53 KB)
📄 cap_sandboxed.3(2.45 KB)
📄 cap_sandboxed.c(1.79 KB)
📄 check_utility_compat.3(2.99 KB)
📄 check_utility_compat.c(2.3 KB)
📄 clock.3(2.59 KB)
📄 clock.c(2.16 KB)
📄 clock_getcpuclockid.3(3.31 KB)
📄 clock_getcpuclockid.c(1.67 KB)
📄 closedir.c(2.38 KB)
📄 confstr.3(3.6 KB)
📄 confstr.c(3.78 KB)
📄 crypt.c(3.13 KB)
📄 ctermid.3(3.03 KB)
📄 ctermid.c(2.21 KB)
📄 daemon.3(3.92 KB)
📄 daemon.c(3.09 KB)
📄 devname-compat11.c(1.79 KB)
📄 devname.3(3.25 KB)
📄 devname.c(2.41 KB)
📄 directory.3(8.7 KB)
📄 dirfd.c(1.62 KB)
📄 dirname.3(2.22 KB)
📄 dirname.c(2.29 KB)
📄 dirname_compat.c(2.05 KB)
📄 disklabel.c(4.86 KB)
📄 dl_iterate_phdr.3(3.27 KB)
📄 dladdr.3(3.92 KB)
📄 dlfcn.c(6.44 KB)
📄 dlinfo.3(7.14 KB)
📄 dllockinit.3(3.9 KB)
📄 dlopen.3(11.35 KB)
📄 drand48.c(605 B)
📄 dup3.3(2.74 KB)
📄 dup3.c(1.96 KB)
📄 elf_utils.c(3.67 KB)
📄 erand48.c(691 B)
📄 err.3(5.79 KB)
📄 err.c(4.35 KB)
📄 errlst.c(8.3 KB)
📄 errno.c(1.45 KB)
📄 eventfd.c(1.79 KB)
📄 exec.3(9.24 KB)
📄 exec.c(7 KB)
📄 exect.c(1.61 KB)
📄 fdevname.c(1.83 KB)
📄 feature_present.3(2.48 KB)
📄 feature_present.c(2.26 KB)
📄 fmtcheck.3(3.27 KB)
📄 fmtcheck.c(6.92 KB)
📄 fmtmsg.3(6.45 KB)
📄 fmtmsg.c(5.86 KB)
📄 fnmatch.3(4.11 KB)
📄 fnmatch.c(8.85 KB)
📄 fpclassify.3(3.11 KB)
📄 fpclassify.c(2.67 KB)
📄 frexp.3(2.76 KB)
📄 frexp.c(1.88 KB)
📄 fstab.c(6.85 KB)
📄 ftok.3(2.71 KB)
📄 ftok.c(1.83 KB)
📄 fts-compat.c(32.07 KB)
📄 fts-compat.h(5.28 KB)
📄 fts-compat11.c(31.65 KB)
📄 fts-compat11.h(3.85 KB)
📄 fts.3(19.27 KB)
📄 fts.c(30.66 KB)
📄 ftw-compat11.c(2.59 KB)
📄 ftw.3(5.7 KB)
📄 ftw.c(2.28 KB)
📄 gen-compat.h(2.35 KB)
📄 gen-private.h(2.64 KB)
📄 getbootfile.3(2.57 KB)
📄 getbootfile.c(2.01 KB)
📄 getbsize.3(3.05 KB)
📄 getbsize.c(3 KB)
📄 getcap.3(14.8 KB)
📄 getcap.c(22.93 KB)
📄 getcontext.3(4.92 KB)
📄 getcwd.3(4.08 KB)
📄 getcwd.c(5.61 KB)
📄 getdiskbyname.3(2.23 KB)
📄 getdomainname.3(2.94 KB)
📄 getdomainname.c(1.98 KB)
📄 getentropy.3(2.05 KB)
📄 getentropy.c(4.09 KB)
📄 getfsent.3(4.54 KB)
📄 getgrent.3(6.7 KB)
📄 getgrent.c(34.33 KB)
📄 getgrouplist.3(2.81 KB)
📄 getgrouplist.c(2.03 KB)
📄 gethostname.3(3.58 KB)
📄 gethostname.c(2.02 KB)
📄 getloadavg.3(2.44 KB)
📄 getloadavg.c(2.39 KB)
📄 getlogin.c(2.65 KB)
📄 getmntinfo-compat11.c(2.61 KB)
📄 getmntinfo.3(3.1 KB)
📄 getmntinfo.c(2.57 KB)
📄 getnetgrent.3(4.02 KB)
📄 getnetgrent.c(24.86 KB)
📄 getosreldate.3(2.48 KB)
📄 getosreldate.c(2.09 KB)
📄 getpagesize.3(2.17 KB)
📄 getpagesize.c(2.46 KB)
📄 getpagesizes.3(2.94 KB)
📄 getpagesizes.c(2.99 KB)
📄 getpass.3(3 KB)
📄 getpeereid.3(3.36 KB)
📄 getpeereid.c(1.95 KB)
📄 getprogname.3(3.1 KB)
📄 getprogname.c(249 B)
📄 getpwent.3(7.67 KB)
📄 getpwent.c(44.7 KB)
📄 getttyent.3(5.75 KB)
📄 getttyent.c(6.7 KB)
📄 getusershell.3(2.86 KB)
📄 getusershell.c(5.74 KB)
📄 getutxent.3(11.32 KB)
📄 getutxent.c(4.89 KB)
📄 getvfsbyname.3(3.44 KB)
📄 getvfsbyname.c(3.1 KB)
📄 glob-compat11.c(25.67 KB)
📄 glob-compat11.h(2.8 KB)
📄 glob.3(10.79 KB)
📄 glob.c(26.49 KB)
📄 initgroups.3(2.62 KB)
📄 initgroups.c(2.33 KB)
📄 isatty.c(1.84 KB)
📄 isgreater.3(2.86 KB)
📄 isinf.c(2.14 KB)
📄 isnan.c(2.36 KB)
📄 jrand48.c(662 B)
📄 lcong48.c(832 B)
📄 ldexp.3(2.47 KB)
📄 ldexp.c(2.89 KB)
📄 libc_dlopen.c(1.88 KB)
📄 lockf.3(7.27 KB)
📄 lockf.c(2.55 KB)
📄 lrand48.c(670 B)
📄 makecontext.3(4.25 KB)
📄 memalign.c(1.63 KB)
📄 modf.3(2.63 KB)
📄 modf.c(2.95 KB)
📄 mrand48.c(709 B)
📄 nftw-compat11.c(2.91 KB)
📄 nftw.c(2.71 KB)
📄 nice.3(2.92 KB)
📄 nice.c(2.14 KB)
📄 nlist.3(2.55 KB)
📄 nlist.c(7.54 KB)
📄 nrand48.c(628 B)
📄 opendir.c(8.52 KB)
📄 pause.3(2.36 KB)
📄 pause.c(2.01 KB)
📄 pmadvise.c(425 B)
📄 popen.3(4.86 KB)
📄 popen.c(6 KB)
📄 posix_spawn.3(14.35 KB)
📄 posix_spawn.c(14.04 KB)
📄 posix_spawn_file_actions_addopen.3(6.28 KB)
📄 posix_spawn_file_actions_init.3(3.78 KB)
📄 posix_spawnattr_getflags.3(3.81 KB)
📄 posix_spawnattr_getpgroup.3(3.45 KB)
📄 posix_spawnattr_getschedparam.3(3.69 KB)
📄 posix_spawnattr_getschedpolicy.3(3.63 KB)
📄 posix_spawnattr_getsigdefault.3(3.65 KB)
📄 posix_spawnattr_getsigmask.3(3.56 KB)
📄 posix_spawnattr_init.3(4.09 KB)
📄 psignal.3(3.18 KB)
📄 psignal.c(2.22 KB)
📄 pututxline.c(7.34 KB)
📄 pw_scan.c(6.3 KB)
📄 pw_scan.h(1.8 KB)
📄 raise.3(2.31 KB)
📄 raise.c(1.96 KB)
📄 rand48.3(4.56 KB)
📄 rand48.h(811 B)
📄 readdir-compat11.c(3.63 KB)
📄 readdir.c(3.91 KB)
📄 readpassphrase.3(4.77 KB)
📄 readpassphrase.c(5.65 KB)
📄 recvmmsg.c(2.83 KB)
📄 rewinddir.c(2.29 KB)
📄 rfork_thread.3(2.7 KB)
📄 scandir-compat11.c(4.89 KB)
📄 scandir.3(3.86 KB)
📄 scandir.c(4.8 KB)
📄 scandir_b.c(1.38 KB)
📄 seed48.c(1 KB)
📄 seekdir.c(2.17 KB)
📄 sem.c(11.4 KB)
📄 sem_destroy.3(2.51 KB)
📄 sem_getvalue.3(2.56 KB)
📄 sem_init.3(2.81 KB)
📄 sem_new.c(9.95 KB)
📄 sem_open.3(5.37 KB)
📄 sem_post.3(2.45 KB)
📄 sem_timedwait.3(5 KB)
📄 sem_wait.3(2.73 KB)
📄 semctl.c(2.67 KB)
📄 sendmmsg.c(2.1 KB)
📄 setdomainname.c(1.97 KB)
📄 sethostname.c(1.96 KB)
📄 setjmp.3(4.48 KB)
📄 setjmperr.c(2.11 KB)
📄 setmode.3(3.56 KB)
📄 setmode.c(11.38 KB)
📄 setproctitle.3(3.54 KB)
📄 setproctitle.c(4.87 KB)
📄 setprogname.c(273 B)
📄 siginterrupt.3(3.74 KB)
📄 siginterrupt.c(2.29 KB)
📄 siglist.c(3.49 KB)
📄 signal.3(9.11 KB)
📄 signal.c(2.17 KB)
📄 sigsetops.3(4.15 KB)
📄 sigsetops.c(3.04 KB)
📄 sleep.3(2.88 KB)
📄 sleep.c(2.61 KB)
📄 srand48.c(859 B)
📄 statvfs.3(4.96 KB)
📄 statvfs.c(3.82 KB)
📄 stringlist.3(3.14 KB)
📄 stringlist.c(2.74 KB)
📄 strtofflags.3(2.96 KB)
📄 strtofflags.c(4.78 KB)
📄 sysconf.3(8.75 KB)
📄 sysconf.c(15.62 KB)
📄 sysctl.3(28.37 KB)
📄 sysctl.c(5.35 KB)
📄 sysctlbyname.c(1.81 KB)
📄 sysctlnametomib.c(2.14 KB)
📄 syslog.3(7.35 KB)
📄 syslog.c(12.21 KB)
📄 tcgetpgrp.3(2.6 KB)
📄 tcgetsid.3(2.24 KB)
📄 tcgetwinsize.3(4.62 KB)
📄 tcsendbreak.3(4.75 KB)
📄 tcsetattr.3(8.86 KB)
📄 tcsetpgrp.3(3.09 KB)
📄 tcsetsid.3(2.83 KB)
📄 telldir.c(5.62 KB)
📄 telldir.h(3.84 KB)
📄 termios.c(5.63 KB)
📄 time.3(2.94 KB)
📄 time.c(1.93 KB)
📄 times.3(3.62 KB)
📄 times.c(2.49 KB)
📄 timespec_get.3(2.52 KB)
📄 timespec_get.c(1.92 KB)
📄 timezone.3(2.29 KB)
📄 timezone.c(3.94 KB)
📄 tls.c(12.39 KB)
📄 trivial-getcontextx.c(1.97 KB)
📄 ttyname.3(3.39 KB)
📄 ttyname.c(3.24 KB)
📄 ttyslot.c(1.8 KB)
📄 tzset.3(7.41 KB)
📄 ualarm.3(2.88 KB)
📄 ualarm.c(2.33 KB)
📄 ucontext.3(3.57 KB)
📄 ulimit.3(2.8 KB)
📄 ulimit.c(2.25 KB)
📄 uname.3(3.14 KB)
📄 uname.c(1.91 KB)
📄 unvis-compat.c(1.89 KB)
📄 usleep.3(2.75 KB)
📄 usleep.c(2.2 KB)
📄 utime.3(2.74 KB)
📄 utime.c(2 KB)
📄 utxdb.c(4.56 KB)
📄 utxdb.h(2.2 KB)
📄 valloc.3(2.37 KB)
📄 valloc.c(1.85 KB)
📄 wait.c(2.1 KB)
📄 wait3.c(2.13 KB)
📄 waitid.c(2.49 KB)
📄 waitpid.c(2.15 KB)
📄 wordexp.3(5.04 KB)
📄 wordexp.c(10.48 KB)

Editing: popen.c

/*-
 * SPDX-License-Identifier: BSD-3-Clause
 *
 * Copyright (c) 1988, 1993
 *	The Regents of the University of California.  All rights reserved.
 *
 * This code is derived from software written by Ken Arnold and
 * published in UNIX Review, Vol. 6, No. 8.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#include <sys/cdefs.h>
__SCCSID("@(#)popen.c	8.3 (Berkeley) 5/3/95");
__FBSDID("$FreeBSD$");

#include "namespace.h"
#include <sys/param.h>
#include <sys/queue.h>
#include <sys/wait.h>

#include <signal.h>
#include <errno.h>
#include <fcntl.h>
#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <paths.h>
#include <pthread.h>
#include "un-namespace.h"
#include "libc_private.h"

extern char **environ;

struct pid {
	SLIST_ENTRY(pid) next;
	FILE *fp;
	pid_t pid;
};
static SLIST_HEAD(, pid) pidlist = SLIST_HEAD_INITIALIZER(pidlist);
static pthread_mutex_t pidlist_mutex = PTHREAD_MUTEX_INITIALIZER;

#define	THREAD_LOCK()	if (__isthreaded) _pthread_mutex_lock(&pidlist_mutex)
#define	THREAD_UNLOCK()	if (__isthreaded) _pthread_mutex_unlock(&pidlist_mutex)

FILE *
popen(const char *command, const char *type)
{
	struct pid *cur;
	FILE *iop;
	int pdes[2], pid, twoway, cloexec;
	int pdes_unused_in_parent;
	char *argv[4];
	struct pid *p;

cloexec = strchr(type, 'e') != NULL;
	/*
	 * Lite2 introduced two-way popen() pipes using _socketpair().
	 * FreeBSD's pipe() is bidirectional, so we use that.
	 */
	if (strchr(type, '+')) {
		twoway = 1;
		type = "r+";
	} else  {
		twoway = 0;
		if ((*type != 'r' && *type != 'w') ||
		    (type[1] && (type[1] != 'e' || type[2])))
			return (NULL);
	}
	if (pipe2(pdes, O_CLOEXEC) < 0)
		return (NULL);

if ((cur = malloc(sizeof(struct pid))) == NULL) {
		(void)_close(pdes[0]);
		(void)_close(pdes[1]);
		return (NULL);
	}

if (*type == 'r') {
		iop = fdopen(pdes[0], type);
		pdes_unused_in_parent = pdes[1];
	} else {
		iop = fdopen(pdes[1], type);
		pdes_unused_in_parent = pdes[0];
	}
	if (iop == NULL) {
		(void)_close(pdes[0]);
		(void)_close(pdes[1]);
		free(cur);
		return (NULL);
	}

argv[0] = "sh";
	argv[1] = "-c";
	argv[2] = (char *)command;
	argv[3] = NULL;

THREAD_LOCK();
	switch (pid = vfork()) {
	case -1:			/* Error. */
		THREAD_UNLOCK();
		/*
		 * The _close() closes the unused end of pdes[], while
		 * the fclose() closes the used end of pdes[], *and* cleans
		 * up iop.
		 */
		(void)_close(pdes_unused_in_parent);
		free(cur);
		(void)fclose(iop);
		return (NULL);
		/* NOTREACHED */
	case 0:				/* Child. */
		if (*type == 'r') {
			/*
			 * The _dup2() to STDIN_FILENO is repeated to avoid
			 * writing to pdes[1], which might corrupt the
			 * parent's copy.  This isn't good enough in
			 * general, since the _exit() is no return, so
			 * the compiler is free to corrupt all the local
			 * variables.
			 */
			if (pdes[1] != STDOUT_FILENO) {
				(void)_dup2(pdes[1], STDOUT_FILENO);
				if (twoway)
					(void)_dup2(STDOUT_FILENO, STDIN_FILENO);
			} else if (twoway && (pdes[1] != STDIN_FILENO)) {
				(void)_dup2(pdes[1], STDIN_FILENO);
				(void)_fcntl(pdes[1], F_SETFD, 0);
			} else
				(void)_fcntl(pdes[1], F_SETFD, 0);
		} else {
			if (pdes[0] != STDIN_FILENO) {
				(void)_dup2(pdes[0], STDIN_FILENO);
			} else
				(void)_fcntl(pdes[0], F_SETFD, 0);
		}
		SLIST_FOREACH(p, &pidlist, next)
			(void)_close(fileno(p->fp));
		_execve(_PATH_BSHELL, argv, environ);
		_exit(127);
		/* NOTREACHED */
	}
	THREAD_UNLOCK();

/* Parent. */
	(void)_close(pdes_unused_in_parent);

/* Link into list of file descriptors. */
	cur->fp = iop;
	cur->pid = pid;
	THREAD_LOCK();
	SLIST_INSERT_HEAD(&pidlist, cur, next);
	THREAD_UNLOCK();

/*
	 * To guard against undesired fd passing with concurrent calls,
	 * only clear the close-on-exec flag after linking the file into
	 * the list which will cause an explicit close.
	 */
	if (!cloexec)
		(void)_fcntl(*type == 'r' ? pdes[0] : pdes[1], F_SETFD, 0);

return (iop);
}

/*
 * pclose --
 *	Pclose returns -1 if stream is not associated with a `popened' command,
 *	if already `pclosed', or waitpid returns an error.
 */
int
pclose(FILE *iop)
{
	struct pid *cur, *last = NULL;
	int pstat;
	pid_t pid;

/*
	 * Find the appropriate file pointer and remove it from the list.
	 */
	THREAD_LOCK();
	SLIST_FOREACH(cur, &pidlist, next) {
		if (cur->fp == iop)
			break;
		last = cur;
	}
	if (cur == NULL) {
		THREAD_UNLOCK();
		return (-1);
	}
	if (last == NULL)
		SLIST_REMOVE_HEAD(&pidlist, next);
	else
		SLIST_REMOVE_AFTER(last, next);
	THREAD_UNLOCK();

(void)fclose(iop);

do {
		pid = _wait4(cur->pid, &pstat, 0, (struct rusage *)0);
	} while (pid == -1 && errno == EINTR);

free(cur);

return (pid == -1 ? -1 : pstat);
}

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Editing: popen.c

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