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📄 Make.tags.inc(2.13 KB)
📄 Makefile(302 B)
📄 bus_if.m(26.31 KB)
📄 capabilities.conf(13.67 KB)
📄 clock_if.m(1.7 KB)
📄 cpufreq_if.m(2.27 KB)
📄 device_if.m(10.41 KB)
📄 firmw.S(2.15 KB)
📄 genassym.sh(1.11 KB)
📄 genoffset.c(1.68 KB)
📄 genoffset.sh(3.58 KB)
📄 imgact_aout.c(9.45 KB)
📄 imgact_binmisc.c(18.64 KB)
📄 imgact_elf.c(76.32 KB)
📄 imgact_elf32.c(1.47 KB)
📄 imgact_elf64.c(1.47 KB)
📄 imgact_shell.c(8.41 KB)
📄 init_main.c(24.31 KB)
📄 init_sysent.c(95.3 KB)
📄 kern_acct.c(19.03 KB)
📄 kern_alq.c(24.97 KB)
📄 kern_clock.c(21.12 KB)
📄 kern_clocksource.c(23.34 KB)
📄 kern_condvar.c(11.28 KB)
📄 kern_conf.c(36.14 KB)
📄 kern_cons.c(15.75 KB)
📄 kern_context.c(3.59 KB)
📄 kern_cpu.c(30.77 KB)
📄 kern_cpuset.c(59.78 KB)
📄 kern_ctf.c(8.73 KB)
📄 kern_descrip.c(112.87 KB)
📄 kern_dtrace.c(2.94 KB)
📄 kern_dump.c(8.51 KB)
📄 kern_environment.c(22.75 KB)
📄 kern_et.c(7.1 KB)
📄 kern_event.c(62.49 KB)
📄 kern_exec.c(46.67 KB)
📄 kern_exit.c(34.61 KB)
📄 kern_fail.c(29.32 KB)
📄 kern_ffclock.c(12.66 KB)
📄 kern_fork.c(28.29 KB)
📄 kern_hhook.c(13.58 KB)
📄 kern_idle.c(2.74 KB)
📄 kern_intr.c(40.44 KB)
📄 kern_jail.c(112.67 KB)
📄 kern_kcov.c(15.32 KB)
📄 kern_khelp.c(9.45 KB)
📄 kern_kthread.c(11.8 KB)
📄 kern_ktr.c(11.93 KB)
📄 kern_ktrace.c(31.41 KB)
📄 kern_linker.c(54.3 KB)
📄 kern_lock.c(46.99 KB)
📄 kern_lockf.c(64.46 KB)
📄 kern_lockstat.c(3.8 KB)
📄 kern_loginclass.c(6.69 KB)
📄 kern_malloc.c(37.09 KB)
📄 kern_mbuf.c(43.16 KB)
📄 kern_mib.c(24.26 KB)
📄 kern_module.c(11.05 KB)
📄 kern_mtxpool.c(5.82 KB)
📄 kern_mutex.c(33.62 KB)
📄 kern_ntptime.c(32.49 KB)
📄 kern_osd.c(12.37 KB)
📄 kern_physio.c(5.74 KB)
📄 kern_pmc.c(8.89 KB)
📄 kern_poll.c(15.86 KB)
📄 kern_priv.c(9.14 KB)
📄 kern_proc.c(80.01 KB)
📄 kern_procctl.c(19.48 KB)
📄 kern_prot.c(57.94 KB)
📄 kern_racct.c(34.01 KB)
📄 kern_rangelock.c(8.67 KB)
📄 kern_rctl.c(53.87 KB)
📄 kern_resource.c(36.66 KB)
📄 kern_rmlock.c(28.27 KB)
📄 kern_rwlock.c(40.72 KB)
📄 kern_sdt.c(2.05 KB)
📄 kern_sema.c(4.85 KB)
📄 kern_sendfile.c(33.97 KB)
📄 kern_sharedpage.c(10.37 KB)
📄 kern_shutdown.c(43.34 KB)
📄 kern_sig.c(101.89 KB)
📄 kern_switch.c(13.85 KB)
📄 kern_sx.c(40.27 KB)
📄 kern_synch.c(18.17 KB)
📄 kern_syscalls.c(6.74 KB)
📄 kern_sysctl.c(67.24 KB)
📄 kern_tc.c(55.73 KB)
📄 kern_thr.c(14.14 KB)
📄 kern_thread.c(41.75 KB)
📄 kern_time.c(40.89 KB)
📄 kern_timeout.c(43.08 KB)
📄 kern_tslog.c(3.44 KB)
📄 kern_ubsan.c(50.74 KB)
📄 kern_umtx.c(107.14 KB)
📄 kern_uuid.c(11.68 KB)
📄 kern_xxx.c(10.44 KB)
📄 ksched.c(6.56 KB)
📄 link_elf.c(47.99 KB)
📄 link_elf_obj.c(44.41 KB)
📄 linker_if.m(3.96 KB)
📄 makesyscalls.sh(23.57 KB)
📄 md4c.c(7.89 KB)
📄 md5c.c(9.56 KB)
📄 msi_if.m(2.48 KB)
📄 p1003_1b.c(8.84 KB)
📄 pic_if.m(3.9 KB)
📄 posix4_mib.c(5.59 KB)
📄 sched_4bsd.c(45.03 KB)
📄 sched_ule.c(82.65 KB)
📄 serdev_if.m(3.49 KB)
📄 stack_protector.c(613 B)
📄 subr_acl_nfs4.c(37.42 KB)
📄 subr_acl_posix1e.c(17.71 KB)
📄 subr_atomic64.c(3.97 KB)
📄 subr_autoconf.c(7.7 KB)
📄 subr_blist.c(31.88 KB)
📄 subr_boot.c(5.8 KB)
📄 subr_bufring.c(2.21 KB)
📄 subr_bus.c(145.4 KB)
📄 subr_bus_dma.c(19.67 KB)
📄 subr_busdma_bufalloc.c(5.24 KB)
📄 subr_capability.c(11.93 KB)
📄 subr_clock.c(10.61 KB)
📄 subr_compressor.c(13.11 KB)
📄 subr_counter.c(4.44 KB)
📄 subr_coverage.c(6.17 KB)
📄 subr_csan.c(25.39 KB)
📄 subr_devmap.c(9.8 KB)
📄 subr_devstat.c(16.21 KB)
📄 subr_disk.c(8.54 KB)
📄 subr_dummy_vdso_tc.c(1.7 KB)
📄 subr_early.c(2.26 KB)
📄 subr_epoch.c(25.02 KB)
📄 subr_eventhandler.c(9.17 KB)
📄 subr_fattime.c(9.98 KB)
📄 subr_filter.c(12.2 KB)
📄 subr_firmware.c(13.88 KB)
📄 subr_gtaskqueue.c(20.19 KB)
📄 subr_hash.c(4.8 KB)
📄 subr_hints.c(12.87 KB)
📄 subr_intr.c(40.61 KB)
📄 subr_kdb.c(16.13 KB)
📄 subr_kobj.c(7.1 KB)
📄 subr_lock.c(18.81 KB)
📄 subr_log.c(7.64 KB)
📄 subr_mchain.c(11.06 KB)
📄 subr_module.c(12.98 KB)
📄 subr_msgbuf.c(10.6 KB)
📄 subr_param.c(10.93 KB)
📄 subr_pcpu.c(10.18 KB)
📄 subr_pctrie.c(20.99 KB)
📄 subr_physmem.c(11.52 KB)
📄 subr_pidctrl.c(5.43 KB)
📄 subr_power.c(3.13 KB)
📄 subr_prf.c(27.42 KB)
📄 subr_prng.c(3.36 KB)
📄 subr_prof.c(15.43 KB)
📄 subr_rangeset.c(8.5 KB)
📄 subr_rman.c(27.61 KB)
📄 subr_rtc.c(11.42 KB)
📄 subr_sbuf.c(20.53 KB)
📄 subr_scanf.c(15.59 KB)
📄 subr_sfbuf.c(6.17 KB)
📄 subr_sglist.c(22.83 KB)
📄 subr_sleepqueue.c(39.43 KB)
📄 subr_smp.c(31.62 KB)
📄 subr_smr.c(20.17 KB)
📄 subr_stack.c(6.47 KB)
📄 subr_stats.c(103.01 KB)
📄 subr_syscall.c(7.98 KB)
📄 subr_taskqueue.c(21.1 KB)
📄 subr_terminal.c(15.52 KB)
📄 subr_trap.c(10.87 KB)
📄 subr_turnstile.c(35.58 KB)
📄 subr_uio.c(11.38 KB)
📄 subr_unit.c(22.97 KB)
📄 subr_vmem.c(43.25 KB)
📄 subr_witness.c(84.59 KB)
📄 sys_capability.c(15.06 KB)
📄 sys_eventfd.c(8.42 KB)
📄 sys_generic.c(44.22 KB)
📄 sys_getrandom.c(4.21 KB)
📄 sys_pipe.c(45.14 KB)
📄 sys_procdesc.c(14.57 KB)
📄 sys_process.c(30.73 KB)
📄 sys_socket.c(20.11 KB)
📄 syscalls.c(22.73 KB)
📄 syscalls.master(60.26 KB)
📄 systrace_args.c(178.49 KB)
📄 sysv_ipc.c(6.53 KB)
📄 sysv_msg.c(48.65 KB)
📄 sysv_sem.c(49.85 KB)
📄 sysv_shm.c(43.93 KB)
📄 tty.c(55.14 KB)
📄 tty_compat.c(11.46 KB)
📄 tty_info.c(9.93 KB)
📄 tty_inq.c(12.22 KB)
📄 tty_outq.c(8.74 KB)
📄 tty_pts.c(19.74 KB)
📄 tty_tty.c(2.83 KB)
📄 tty_ttydisc.c(28.6 KB)
📄 uipc_accf.c(8.07 KB)
📄 uipc_debug.c(12.42 KB)
📄 uipc_domain.c(13.13 KB)
📄 uipc_ktls.c(55.7 KB)
📄 uipc_mbuf.c(52.45 KB)
📄 uipc_mbuf2.c(12.64 KB)
📄 uipc_mbufhash.c(4.9 KB)
📄 uipc_mqueue.c(64.64 KB)
📄 uipc_sem.c(25.18 KB)
📄 uipc_shm.c(50.47 KB)
📄 uipc_sockbuf.c(42.9 KB)
📄 uipc_socket.c(110.61 KB)
📄 uipc_syscalls.c(35.94 KB)
📄 uipc_usrreq.c(75.11 KB)
📄 vfs_acl.c(14.5 KB)
📄 vfs_aio.c(76.32 KB)
📄 vfs_bio.c(145.39 KB)
📄 vfs_cache.c(143.09 KB)
📄 vfs_cluster.c(28.36 KB)
📄 vfs_default.c(33.16 KB)
📄 vfs_export.c(14.55 KB)
📄 vfs_extattr.c(17.91 KB)
📄 vfs_hash.c(6 KB)
📄 vfs_init.c(15.86 KB)
📄 vfs_lookup.c(45.48 KB)
📄 vfs_mount.c(62.58 KB)
📄 vfs_mountroot.c(26.23 KB)
📄 vfs_subr.c(167.52 KB)
📄 vfs_syscalls.c(106.86 KB)
📄 vfs_vnops.c(86.28 KB)
📄 vnode_if.src(13.66 KB)

Editing: imgact_shell.c

/*-
 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
 *
 * Copyright (c) 1993, David Greenman
 * All rights reserved.
 *
 * 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.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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>
__FBSDID("$FreeBSD$");

#include <sys/param.h>
#include <sys/vnode.h>
#include <sys/proc.h>
#include <sys/sbuf.h>
#include <sys/systm.h>
#include <sys/sysproto.h>
#include <sys/exec.h>
#include <sys/imgact.h>
#include <sys/kernel.h>

#if BYTE_ORDER == LITTLE_ENDIAN
#define SHELLMAGIC	0x2123 /* #! */
#else
#define SHELLMAGIC	0x2321
#endif

/*
 * At the time of this writing, MAXSHELLCMDLEN == PAGE_SIZE.  This is
 * significant because the caller has only mapped in one page of the
 * file we're reading.
 */
#if MAXSHELLCMDLEN > PAGE_SIZE
#error "MAXSHELLCMDLEN is larger than a single page!"
#endif

/*
 * MAXSHELLCMDLEN must be at least MAXINTERP plus the size of the `#!'
 * prefix and terminating newline.
 */
CTASSERT(MAXSHELLCMDLEN >= MAXINTERP + 3);

/**
 * Shell interpreter image activator. An interpreter name beginning at
 * imgp->args->begin_argv is the minimal successful exit requirement.
 *
 * If the given file is a shell-script, then the first line will start
 * with the two characters `#!' (aka SHELLMAGIC), followed by the name
 * of the shell-interpreter to run, followed by zero or more tokens.
 *
 * The interpreter is then started up such that it will see:
 *    arg[0] -> The name of interpreter as specified after `#!' in the
 *		first line of the script.  The interpreter name must
 *		not be longer than MAXSHELLCMDLEN bytes.
 *    arg[1] -> *If* there are any additional tokens on the first line,
 *		then we add a new arg[1], which is a copy of the rest of
 *		that line.  The copy starts at the first token after the
 *		interpreter name.  We leave it to the interpreter to
 *		parse the tokens in that value.
 *    arg[x] -> the full pathname of the script.  This will either be
 *		arg[2] or arg[1], depending on whether or not tokens
 *		were found after the interpreter name.
 *  arg[x+1] -> all the arguments that were specified on the original
 *		command line.
 *
 * This processing is described in the execve(2) man page.
 */

/*
 * HISTORICAL NOTE: From 1993 to mid-2005, FreeBSD parsed out the tokens as
 * found on the first line of the script, and setup each token as a separate
 * value in arg[].  This extra processing did not match the behavior of other
 * OS's, and caused a few subtle problems.  For one, it meant the kernel was
 * deciding how those values should be parsed (wrt characters for quoting or
 * comments, etc), while the interpreter might have other rules for parsing.
 * It also meant the interpreter had no way of knowing which arguments came
 * from the first line of the shell script, and which arguments were specified
 * by the user on the command line.  That extra processing was dropped in the
 * 6.x branch on May 28, 2005 (matching __FreeBSD_version 600029).
 */
int
exec_shell_imgact(struct image_params *imgp)
{
	const char *image_header = imgp->image_header;
	const char *ihp, *interpb, *interpe, *maxp, *optb, *opte, *fname;
	int error, offset;
	size_t length;
	struct vattr vattr;
	struct sbuf *sname;

/* a shell script? */
	if (((const short *)image_header)[0] != SHELLMAGIC)
		return (-1);

/*
	 * Don't allow a shell script to be the shell for a shell
	 *	script. :-)
	 */
	if (imgp->interpreted & IMGACT_SHELL)
		return (ENOEXEC);

imgp->interpreted |= IMGACT_SHELL;

/*
	 * At this point we have the first page of the file mapped.
	 * However, we don't know how far into the page the contents are
	 * valid -- the actual file might be much shorter than the page.
	 * So find out the file size.
	 */
	error = VOP_GETATTR(imgp->vp, &vattr, imgp->proc->p_ucred);
	if (error)
		return (error);

/*
	 * Copy shell name and arguments from image_header into a string
	 * buffer.
	 */
	maxp = &image_header[MIN(vattr.va_size, MAXSHELLCMDLEN)];
	ihp = &image_header[2];

/*
	 * Find the beginning and end of the interpreter_name.  If the
	 * line does not include any interpreter, or if the name which
	 * was found is too long, we bail out.
	 */
	while (ihp < maxp && ((*ihp == ' ') || (*ihp == '\t')))
		ihp++;
	interpb = ihp;
	while (ihp < maxp && ((*ihp != ' ') && (*ihp != '\t') && (*ihp != '\n')
	    && (*ihp != '\0')))
		ihp++;
	interpe = ihp;
	if (interpb == interpe)
		return (ENOEXEC);
	if (interpe - interpb >= MAXINTERP)
		return (ENAMETOOLONG);

/*
	 * Find the beginning of the options (if any), and the end-of-line.
	 * Then trim the trailing blanks off the value.  Note that some
	 * other operating systems do *not* trim the trailing whitespace...
	 */
	while (ihp < maxp && ((*ihp == ' ') || (*ihp == '\t')))
		ihp++;
	optb = ihp;
	while (ihp < maxp && ((*ihp != '\n') && (*ihp != '\0')))
		ihp++;
	opte = ihp;
	if (opte == maxp)
		return (ENOEXEC);
	while (--ihp > optb && ((*ihp == ' ') || (*ihp == '\t')))
		opte = ihp;

if (imgp->args->fname != NULL) {
		fname = imgp->args->fname;
		sname = NULL;
	} else {
		sname = sbuf_new_auto();
		sbuf_printf(sname, "/dev/fd/%d", imgp->args->fd);
		sbuf_finish(sname);
		fname = sbuf_data(sname);
	}

/*
	 * We need to "pop" (remove) the present value of arg[0], and "push"
	 * either two or three new values in the arg[] list.  To do this,
	 * we first shift all the other values in the `begin_argv' area to
	 * provide the exact amount of room for the values added.  Set up
	 * `offset' as the number of bytes to be added to the `begin_argv'
	 * area, and 'length' as the number of bytes being removed.
	 */
	offset = interpe - interpb + 1;			/* interpreter */
	if (opte > optb)				/* options (if any) */
		offset += opte - optb + 1;
	offset += strlen(fname) + 1;			/* fname of script */
	length = (imgp->args->argc == 0) ? 0 :
	    strlen(imgp->args->begin_argv) + 1;		/* bytes to delete */

error = exec_args_adjust_args(imgp->args, length, offset);
	if (error != 0) {
		if (sname != NULL)
			sbuf_delete(sname);
		return (error);
	}

/*
	 * If there was no arg[0] when we started, then the interpreter_name
	 * is adding an argument (instead of replacing the arg[0] we started
	 * with).  And we're always adding an argument when we include the
	 * full pathname of the original script.
	 */
	if (imgp->args->argc == 0)
		imgp->args->argc = 1;
	imgp->args->argc++;

/*
	 * The original arg[] list has been shifted appropriately.  Copy in
	 * the interpreter name and options-string.
	 */
	length = interpe - interpb;
	bcopy(interpb, imgp->args->begin_argv, length);
	*(imgp->args->begin_argv + length) = '\0';
	offset = length + 1;
	if (opte > optb) {
		length = opte - optb;
		bcopy(optb, imgp->args->begin_argv + offset, length);
		*(imgp->args->begin_argv + offset + length) = '\0';
		offset += length + 1;
		imgp->args->argc++;
	}

/*
	 * Finally, add the filename onto the end for the interpreter to
	 * use and copy the interpreter's name to imgp->interpreter_name
	 * for exec to use.
	 */
	error = copystr(fname, imgp->args->begin_argv + offset,
	    imgp->args->stringspace, NULL);

if (error == 0)
		imgp->interpreter_name = imgp->args->begin_argv;

if (sname != NULL)
		sbuf_delete(sname);
	return (error);
}

/*
 * Tell kern_execve.c about it, with a little help from the linker.
 */
static struct execsw shell_execsw = {
	.ex_imgact = exec_shell_imgact,
	.ex_name = "#!"
};
EXEC_SET(shell, shell_execsw);

003 File Manager

Editing: imgact_shell.c

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