File Manager

003 File Manager

Current Path: /usr/src/usr.sbin/ppp

📁 ..
📄 Makefile(1.66 KB)
📄 Makefile.depend(435 B)
📄 README.changes(7.26 KB)
📄 README.nat(14.85 KB)
📄 acf.c(3.51 KB)
📄 acf.h(1.5 KB)
📄 arp.c(8.24 KB)
📄 arp.h(1.76 KB)
📄 async.c(5.39 KB)
📄 async.h(1.9 KB)
📄 auth.c(12.02 KB)
📄 auth.h(2.69 KB)
📄 bundle.c(56.37 KB)
📄 bundle.h(7.7 KB)
📄 cbcp.c(22.53 KB)
📄 cbcp.h(2.51 KB)
📄 ccp.c(23.33 KB)
📄 ccp.h(5.53 KB)
📄 chap.c(27 KB)
📄 chap.h(2.69 KB)
📄 chap_ms.c(12.22 KB)
📄 chap_ms.h(2.48 KB)
📄 chat.c(20.41 KB)
📄 chat.h(2.92 KB)
📄 command.c(101.76 KB)
📄 command.h(3.02 KB)
📄 datalink.c(42.89 KB)
📄 datalink.h(6.11 KB)
📄 deflate.c(15.89 KB)
📄 deflate.h(1.52 KB)
📄 defs.c(8.61 KB)
📄 defs.h(5.41 KB)
📄 descriptor.h(2.24 KB)
📄 ether.c(20.81 KB)
📄 ether.h(1.73 KB)
📄 exec.c(11.47 KB)
📄 exec.h(1.67 KB)
📄 filter.c(15.76 KB)
📄 filter.h(3.8 KB)
📄 fsm.c(31.01 KB)
📄 fsm.h(7.02 KB)
📄 hdlc.c(15.17 KB)
📄 hdlc.h(3.9 KB)
📄 i4b.h(1.73 KB)
📄 id.c(6.05 KB)
📄 id.h(3.01 KB)
📄 iface.c(22.41 KB)
📄 iface.h(2.97 KB)
📄 ip.c(30.21 KB)
📄 ip.h(2.09 KB)
📄 ipcp.c(42.99 KB)
📄 ipcp.h(5.14 KB)
📄 iplist.c(5.54 KB)
📄 iplist.h(1.99 KB)
📄 ipv6cp.c(21.9 KB)
📄 ipv6cp.h(3.26 KB)
📄 layer.h(1.97 KB)
📄 lcp.c(39.22 KB)
📄 lcp.h(6.3 KB)
📄 link.c(10.36 KB)
📄 link.h(3.42 KB)
📄 log.c(11.33 KB)
📄 log.h(4.14 KB)
📄 lqr.c(17.5 KB)
📄 lqr.h(3.31 KB)
📄 main.c(17.93 KB)
📄 main.h(1.6 KB)
📄 mbuf.c(10.02 KB)
📄 mbuf.h(4 KB)
📄 mp.c(33.66 KB)
📄 mp.h(4.87 KB)
📄 mppe.c(20.27 KB)
📄 mppe.h(1.57 KB)
📄 nat_cmd.c(15.37 KB)
📄 nat_cmd.h(1.88 KB)
📄 ncp.c(13.17 KB)
📄 ncp.h(4.36 KB)
📄 ncpaddr.c(23.06 KB)
📄 ncpaddr.h(4.63 KB)
📄 netgraph.c(20.65 KB)
📄 netgraph.h(1.72 KB)
📄 pap.c(8.83 KB)
📄 pap.h(1.78 KB)
📄 physical.c(29.01 KB)
📄 physical.h(6.5 KB)
📄 ppp.8(149.48 KB)
📄 ppp.conf(1.23 KB)
📄 pred.c(8.83 KB)
📄 pred.h(1.59 KB)
📄 probe.c(2.29 KB)
📄 probe.h(1.57 KB)
📄 prompt.c(12.92 KB)
📄 prompt.h(3.87 KB)
📄 proto.c(3.22 KB)
📄 proto.h(2.4 KB)
📄 radius.c(39.38 KB)
📄 radius.h(4.6 KB)
📄 route.c(25.91 KB)
📄 route.h(3.3 KB)
📄 server.c(10.9 KB)
📄 server.h(2.26 KB)
📄 sig.c(3.45 KB)
📄 sig.h(1.6 KB)
📄 slcompress.c(17.2 KB)
📄 slcompress.h(6.48 KB)
📄 sync.c(2.7 KB)
📄 sync.h(1.44 KB)
📄 systems.c(11.45 KB)
📄 systems.h(2.02 KB)
📄 tcp.c(5.63 KB)
📄 tcp.h(1.66 KB)
📄 tcpmss.c(5.06 KB)
📄 tcpmss.h(1.44 KB)
📄 throughput.c(8.84 KB)
📄 throughput.h(2.91 KB)
📄 timer.c(8.14 KB)
📄 timer.h(2.31 KB)
📄 tty.c(20.63 KB)
📄 tty.h(1.73 KB)
📄 tun.c(3.27 KB)
📄 tun.h(1.58 KB)
📄 ua.h(2.98 KB)
📄 udp.c(8.7 KB)
📄 udp.h(1.67 KB)
📄 vjcomp.c(5.68 KB)
📄 vjcomp.h(1.53 KB)

Editing: systems.c

/*-
 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
 *
 * Copyright (c) 1996 - 2001 Brian Somers <brian@Awfulhak.org>
 *          based on work by Toshiharu OHNO <tony-o@iij.ad.jp>
 *                           Internet Initiative Japan, Inc (IIJ)
 * 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.
 *
 * $FreeBSD$
 */

#include <sys/param.h>

#include <ctype.h>
#include <pwd.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <termios.h>

#include "defs.h"
#include "command.h"
#include "log.h"
#include "id.h"
#include "systems.h"

#define issep(ch) ((ch) == ' ' || (ch) == '\t')

FILE *
OpenSecret(const char *file)
{
  FILE *fp;
  char line[100];

snprintf(line, sizeof line, "%s/%s", PPP_CONFDIR, file);
  fp = ID0fopen(line, "r");
  if (fp == NULL)
    log_Printf(LogWARN, "OpenSecret: Can't open %s.\n", line);
  return (fp);
}

void
CloseSecret(FILE *fp)
{
  fclose(fp);
}

/* Move string from ``from'' to ``to'', interpreting ``~'' and $.... */
const char *
InterpretArg(const char *from, char *to)
{
  char *ptr, *startto, *endto;
  struct passwd *pwd;
  int instring;
  size_t len;
  const char *env;

instring = 0;
  startto = to;
  endto = to + LINE_LEN - 1;

while(issep(*from))
    from++;

while (*from != '\0') {
    switch (*from) {
      case '"':
        instring = !instring;
        *to++ = *from++;
        break;
      case '\\':
        switch (*++from) {
          case '$':
          case '~':
            break;		/* Swallow the escapes */

default:
            *to++ = '\\';	/* Pass the escapes on, maybe skipping \# */
            break;
        }
        *to++ = *from++;
        break;
      case '$':
        if (from[1] == '$') {
          *to = '\0';	/* For an empty var name below */
          from += 2;
        } else if (from[1] == '{') {
          ptr = strchr(from+2, '}');
          if (ptr) {
            len = ptr - from - 2;
            if (endto - to < (int)len )
              len = endto - to;
            if (len) {
              strncpy(to, from+2, len);
              to[len] = '\0';
              from = ptr+1;
            } else {
              *to++ = *from++;
              continue;
            }
          } else {
            *to++ = *from++;
            continue;
          }
        } else {
          ptr = to;
          for (from++; (isalnum(*from) || *from == '_') && ptr < endto; from++)
            *ptr++ = *from;
          *ptr = '\0';
        }
        if (*to == '\0')
          *to++ = '$';
        else if ((env = getenv(to)) != NULL) {
          strncpy(to, env, endto - to);
          *endto = '\0';
          to += strlen(to);
        }
        break;

case '~':
        ptr = strchr(++from, '/');
        len = ptr ? (size_t)(ptr - from) : strlen(from);
        if (len == 0)
          pwd = getpwuid(ID0realuid());
        else {
          strncpy(to, from, len);
          to[len] = '\0';
          pwd = getpwnam(to);
        }
        if (pwd == NULL)
          *to++ = '~';
        else {
          strncpy(to, pwd->pw_dir, endto - to);
          *endto = '\0';
          to += strlen(to);
          from += len;
        }
        endpwent();
        break;

default:
        *to++ = *from++;
        break;
    }
  }

while (to > startto) {
    to--;
    if (!issep(*to)) {
      to++;
      break;
    }
  }
  *to = '\0';

return from;
}

#define CTRL_UNKNOWN (0)
#define CTRL_INCLUDE (1)

static int
DecodeCtrlCommand(char *line, char *arg)
{
  const char *end;

if (!strncasecmp(line, "include", 7) && issep(line[7])) {
    end = InterpretArg(line+8, arg);
    if (*end && *end != '#')
      log_Printf(LogWARN, "usage: !include filename\n");
    else
      return CTRL_INCLUDE;
  }
  return CTRL_UNKNOWN;
}

/*
 * Initialised in system_IsValid(), set in ReadSystem(),
 * used by system_IsValid()
 */
static int modeok;
static int userok;
static int modereq;

int
AllowUsers(struct cmdargs const *arg)
{
  /* arg->bundle may be NULL (see system_IsValid()) ! */
  int f;
  struct passwd *pwd;

if (userok == -1)
    userok = 0;

pwd = getpwuid(ID0realuid());
  if (pwd != NULL)
    for (f = arg->argn; f < arg->argc; f++)
      if (!strcmp("*", arg->argv[f]) || !strcmp(pwd->pw_name, arg->argv[f])) {
        userok = 1;
        break;
      }
  endpwent();

return 0;
}

int
AllowModes(struct cmdargs const *arg)
{
  /* arg->bundle may be NULL (see system_IsValid()) ! */
  int f, mode, allowed;

allowed = 0;
  for (f = arg->argn; f < arg->argc; f++) {
    mode = Nam2mode(arg->argv[f]);
    if (mode == PHYS_NONE || mode == PHYS_ALL)
      log_Printf(LogWARN, "allow modes: %s: Invalid mode\n", arg->argv[f]);
    else
      allowed |= mode;
  }

modeok = modereq & allowed ? 1 : 0;
  return 0;
}

static char *
strip(char *line)
{
  int len;

len = strlen(line);
  while (len && (line[len-1] == '\n' || line[len-1] == '\r' ||
                 issep(line[len-1])))
    line[--len] = '\0';

while (issep(*line))
    line++;

if (*line == '#')
    *line = '\0';

return line;
}

static int
xgets(char *buf, int buflen, FILE *fp)
{
  int len, n;

n = 0;
  while (fgets(buf, buflen-1, fp)) {
    n++;
    buf[buflen-1] = '\0';
    len = strlen(buf);
    while (len && (buf[len-1] == '\n' || buf[len-1] == '\r'))
      buf[--len] = '\0';
    if (len && buf[len-1] == '\\') {
      buf += len - 1;
      buflen -= len - 1;
      if (!buflen)        /* No buffer space */
        break;
    } else
      break;
  }
  return n;
}

/* Values for ``how'' in ReadSystem */
#define SYSTEM_EXISTS	1
#define SYSTEM_VALIDATE	2
#define SYSTEM_EXEC	3

static char *
GetLabel(char *line, const char *filename, int linenum)
{
  char *argv[MAXARGS];
  int argc, len;

argc = MakeArgs(line, argv, MAXARGS, PARSE_REDUCE);

if (argc == 2 && !strcmp(argv[1], ":"))
    return argv[0];

if (argc != 1 || (len = strlen(argv[0])) < 2 || argv[0][len-1] != ':') {
      log_Printf(LogWARN, "Bad label in %s (line %d) - missing colon\n",
                 filename, linenum);
      return NULL;
  }
  argv[0][len-1] = '\0';	/* Lose the ':' */

return argv[0];
}

/* Returns -2 for ``file not found'' and -1 for ``label not found'' */

static int
ReadSystem(struct bundle *bundle, const char *name, const char *file,
           struct prompt *prompt, struct datalink *cx, int how)
{
  FILE *fp;
  char *cp;
  int n, len;
  char line[LINE_LEN];
  char filename[PATH_MAX];
  int linenum;
  int argc;
  char *argv[MAXARGS];
  int allowcmd;
  int indent;
  char arg[LINE_LEN];
  struct prompt *op;

if (*file == '/')
    snprintf(filename, sizeof filename, "%s", file);
  else
    snprintf(filename, sizeof filename, "%s/%s", PPP_CONFDIR, file);
  fp = ID0fopen(filename, "r");
  if (fp == NULL) {
    log_Printf(LogDEBUG, "ReadSystem: Can't open %s.\n", filename);
    return -2;
  }
  log_Printf(LogDEBUG, "ReadSystem: Checking %s (%s).\n", name, filename);

linenum = 0;
  while ((n = xgets(line, sizeof line, fp))) {
    linenum += n;
    if (issep(*line))
      continue;

cp = strip(line);

switch (*cp) {
    case '\0':			/* empty/comment */
      break;

case '!':
      switch (DecodeCtrlCommand(cp+1, arg)) {
      case CTRL_INCLUDE:
        log_Printf(LogCOMMAND, "%s: Including \"%s\"\n", filename, arg);
        n = ReadSystem(bundle, name, arg, prompt, cx, how);
        log_Printf(LogCOMMAND, "%s: Done include of \"%s\"\n", filename, arg);
        if (!n) {
          fclose(fp);
          return 0;	/* got it */
        }
        break;
      default:
        log_Printf(LogWARN, "%s: %s: Invalid command\n", filename, cp);
        break;
      }
      break;

default:
      if ((cp = GetLabel(cp, filename, linenum)) == NULL)
        continue;

if (strcmp(cp, name) == 0) {
        /* We're in business */
        if (how == SYSTEM_EXISTS) {
          fclose(fp);
	  return 0;
	}
	while ((n = xgets(line, sizeof line, fp))) {
          linenum += n;
          indent = issep(*line);
          cp = strip(line);

if (*cp == '\0')			/* empty / comment */
            continue;

if (!indent) {			/* start of next section */
            if (*cp != '!' && how == SYSTEM_EXEC)
              cp = GetLabel(cp, filename, linenum);
            break;
          }

len = strlen(cp);
          if ((argc = command_Expand_Interpret(cp, len, argv, cp - line)) < 0)
            log_Printf(LogWARN, "%s: %d: Syntax error\n", filename, linenum);
          else {
            allowcmd = argc > 0 && !strcasecmp(argv[0], "allow");
            if ((how != SYSTEM_EXEC && allowcmd) ||
                (how == SYSTEM_EXEC && !allowcmd)) {
              /*
               * Disable any context so that warnings are given to everyone,
               * including syslog.
               */
              op = log_PromptContext;
              log_PromptContext = NULL;
	      command_Run(bundle, argc, (char const *const *)argv, prompt,
                          name, cx);
              log_PromptContext = op;
            }
          }
        }

fclose(fp);  /* everything read - get out */
	return 0;
      }
      break;
    }
  }
  fclose(fp);
  return -1;
}

const char *
system_IsValid(const char *name, struct prompt *prompt, int mode)
{
  /*
   * Note:  The ReadSystem() calls only result in calls to the Allow*
   * functions.  arg->bundle will be set to NULL for these commands !
   */
  int def, how, rs;
  int defuserok;

def = !strcmp(name, "default");
  how = ID0realuid() == 0 ? SYSTEM_EXISTS : SYSTEM_VALIDATE;
  userok = -1;
  modeok = 1;
  modereq = mode;

rs = ReadSystem(NULL, "default", CONFFILE, prompt, NULL, how);

defuserok = userok;
  userok = -1;

if (!def) {
    if (rs == -1)
      rs = 0;		/* we don't care that ``default'' doesn't exist */

if (rs == 0)
      rs = ReadSystem(NULL, name, CONFFILE, prompt, NULL, how);

if (rs == -1)
      return "Configuration label not found";

if (rs == -2)
      return PPP_CONFDIR "/" CONFFILE " : File not found";
  }

if (userok == -1)
    userok = defuserok;

if (how == SYSTEM_EXISTS)
    userok = modeok = 1;

if (!userok)
    return "User access denied";

if (!modeok)
    return "Mode denied for this label";

return NULL;
}

int
system_Select(struct bundle *bundle, const char *name, const char *file,
             struct prompt *prompt, struct datalink *cx)
{
  userok = modeok = 1;
  modereq = PHYS_ALL;
  return ReadSystem(bundle, name, file, prompt, cx, SYSTEM_EXEC);
}

003 File Manager

Editing: systems.c

Upload File

Create Folder