File Manager

003 File Manager

Current Path: /usr/src/stand/libsa

📁 ..
📄 Makefile(5.67 KB)
📄 Makefile.depend(176 B)
📄 __main.c(1.82 KB)
📄 abort.c(1.42 KB)
📁 amd64
📄 arp.c(7.51 KB)
📄 assert.c(1.71 KB)
📄 bcd.c(1.48 KB)
📄 bootp.c(19.71 KB)
📄 bootp.h(4.58 KB)
📄 bootparam.c(9.78 KB)
📄 bootparam.h(180 B)
📄 bzipfs.c(9.92 KB)
📄 cd9660.c(15.37 KB)
📄 cd9660read.c(9.08 KB)
📄 close.c(3.37 KB)
📄 closeall.c(3 KB)
📄 crc32_libkern.c(58 B)
📄 dev.c(1.92 KB)
📄 dosfs.c(22.02 KB)
📄 dosfs.h(4.68 KB)
📄 environment.c(5.3 KB)
📄 ether.c(4.02 KB)
📄 ext2fs.c(23.7 KB)
📄 fstat.c(2.07 KB)
📁 geli
📄 getopt.c(3.46 KB)
📄 gets.c(2.88 KB)
📄 globals.c(1.11 KB)
📄 gpt.c(10.85 KB)
📄 gpt.h(1.62 KB)
📄 gzipfs.c(8.95 KB)
📄 hexdump.c(2.36 KB)
📁 i386
📄 in_cksum.c(2.94 KB)
📄 inet_ntoa.c(2.35 KB)
📄 ioctl.c(3.19 KB)
📄 iodesc.h(2.26 KB)
📄 ip.c(10.5 KB)
📄 libsa.3(14.32 KB)
📄 lseek.c(4.58 KB)
📁 mips
📄 net.c(6.84 KB)
📄 net.h(4.23 KB)
📄 netif.c(7.26 KB)
📄 netif.h(1.49 KB)
📄 nfs.c(18.2 KB)
📄 nfsv2.h(3.67 KB)
📄 nullfs.c(3.44 KB)
📄 open.c(4.43 KB)
📄 pager.c(3.61 KB)
📄 panic.c(2.26 KB)
📄 pkgfs.c(17.54 KB)
📁 powerpc
📄 printf.c(11.96 KB)
📄 random.c(2.3 KB)
📄 rarp.c(5.42 KB)
📄 read.c(4.45 KB)
📄 readdir.c(1.8 KB)
📄 rpc.c(10.08 KB)
📄 rpc.h(2.61 KB)
📄 rpcv2.h(2.86 KB)
📄 saioctl.h(2.59 KB)
📄 sbrk.c(2.06 KB)
📄 smbios.c(13.81 KB)
📄 smbios.h(1.48 KB)
📄 splitfs.c(7.59 KB)
📄 stand.h(15.61 KB)
📄 stat.c(1.89 KB)
📄 strcasecmp.c(2.36 KB)
📄 strdup.c(2.02 KB)
📄 strerror.c(3.04 KB)
📄 tftp.c(17.16 KB)
📄 tftp.h(1.76 KB)
📄 time.c(1.49 KB)
📄 twiddle.c(2.4 KB)
📄 udp.c(4.62 KB)
📄 ufs.c(19.98 KB)
📄 ufsread.c(8.73 KB)
📄 uuid_from_string.c(3.88 KB)
📄 uuid_to_string.c(3.25 KB)
📄 write.c(3.44 KB)
📁 x86
📄 xlocale_private.h(1.52 KB)
📄 zalloc.c(9.15 KB)
📄 zalloc_defs.h(2.57 KB)
📄 zalloc_malloc.c(5.3 KB)
📄 zalloc_mem.h(1.84 KB)
📄 zalloc_protos.h(1.79 KB)
📁 zfs

Editing: environment.c

/* 
 * Copyright (c) 1998 Michael Smith.
 * 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("$FreeBSD$");

/*
 * Manage an environment-like space in which string variables may be stored.
 * Provide support for some method-like operations for setting/retrieving
 * variables in order to allow some type strength.
 */

#include "stand.h"

#include <string.h>

struct env_var	*environ = NULL;

/*
 * Look up (name) and return it's env_var structure.
 */
struct env_var	*
env_getenv(const char *name)
{
	struct env_var	*ev;
    
	for (ev = environ; ev != NULL; ev = ev->ev_next)
		if (!strcmp(ev->ev_name, name))
			break;
	return (ev);
}

/*
 * Some notes:
 *
 * If the EV_VOLATILE flag is set, a copy of the variable is made.
 * If EV_DYNAMIC is set, the variable has been allocated with
 * malloc and ownership transferred to the environment.
 * If (value) is NULL, the variable is set but has no value.
 */
int
env_setenv(const char *name, int flags, const void *value,
    ev_sethook_t sethook, ev_unsethook_t unsethook)
{
	struct env_var	*ev, *curr, *last;

if ((ev = env_getenv(name)) != NULL) {
		/*
		 * If there's a set hook, let it do the work
		 * (unless we are working for one already).
		 */
		if ((ev->ev_sethook != NULL) && !(flags & EV_NOHOOK))
			return (ev->ev_sethook(ev, flags, value));

/* If there is data in the variable, discard it. */
		if (ev->ev_value != NULL && (ev->ev_flags & EV_DYNAMIC) != 0)
			free(ev->ev_value);
		ev->ev_value = NULL;
		ev->ev_flags &= ~EV_DYNAMIC;

} else {

/*
		 * New variable; create and sort into list
		 */
		ev = malloc(sizeof(struct env_var));
		ev->ev_name = strdup(name);
		ev->ev_value = NULL;
		ev->ev_flags = 0;
		/* hooks can only be set when the variable is instantiated */
		ev->ev_sethook = sethook;
		ev->ev_unsethook = unsethook;

/* Sort into list */
		ev->ev_prev = NULL;
		ev->ev_next = NULL;
		/* Search for the record to insert before */
		for (last = NULL, curr = environ; curr != NULL;
		    last = curr, curr = curr->ev_next) {

if (strcmp(ev->ev_name, curr->ev_name) < 0) {
				if (curr->ev_prev) {
					curr->ev_prev->ev_next = ev;
				} else {
					environ = ev;
				}
				ev->ev_next = curr;
				ev->ev_prev = curr->ev_prev;
				curr->ev_prev = ev;
				break;
			}
		}
		if (curr == NULL) {
			if (last == NULL) {
				environ = ev;
			} else {
				last->ev_next = ev;
				ev->ev_prev = last;
			}
		}
	}

/* If we have a new value, use it */
	if (flags & EV_VOLATILE) {
		ev->ev_value = strdup(value);
		ev->ev_flags |= EV_DYNAMIC;
	} else {
		ev->ev_value = (char *)value;
		ev->ev_flags |= flags & EV_DYNAMIC;
	}

return (0);
}

/* coverity[ -tainted_string_return_content ] */
char *
getenv(const char *name)
{
	struct env_var	*ev;

/* Set but no value gives empty string */
	if ((ev = env_getenv(name)) != NULL) {
		if (ev->ev_value != NULL)
			return (ev->ev_value);
		return ("");
	}
	return (NULL);
}

int
setenv(const char *name, const char *value, int overwrite)
{
	/* No guarantees about state, always assume volatile */
	if (overwrite || (env_getenv(name) == NULL))
		return (env_setenv(name, EV_VOLATILE, value, NULL, NULL));
	return (0);
}

int
putenv(char *string)
{
	char	*value, *copy;
	int	result;

copy = strdup(string);
	if ((value = strchr(copy, '=')) != NULL)
		*(value++) = 0;
	result = setenv(copy, value, 1);
	free(copy);
	return (result);
}

int
unsetenv(const char *name)
{
	struct env_var	*ev;
	int		err;

err = 0;
	if ((ev = env_getenv(name)) == NULL) {
		err = ENOENT;
	} else {
		if (ev->ev_unsethook != NULL)
			err = ev->ev_unsethook(ev);
		if (err == 0) {
			env_discard(ev);
		}
	}
	return (err);
}

void
env_discard(struct env_var *ev)
{
	if (ev->ev_prev)
		ev->ev_prev->ev_next = ev->ev_next;
	if (ev->ev_next)
		ev->ev_next->ev_prev = ev->ev_prev;
	if (environ == ev)
		environ = ev->ev_next;
	free(ev->ev_name);
	if (ev->ev_value != NULL && (ev->ev_flags & EV_DYNAMIC) != 0)
		free(ev->ev_value);
	free(ev);
}

int
env_noset(struct env_var *ev __unused, int flags __unused,
    const void *value __unused)
{
	return (EPERM);
}

int
env_nounset(struct env_var *ev __unused)
{
	return (EPERM);
}

003 File Manager

Editing: environment.c

Upload File

Create Folder