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1 #pragma ident "@(#)conversions.c 1.1 01/06/26 SMI"
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2
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3 /****************************************************************************
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4
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5 Copyright (c) 1999,2000 WU-FTPD Development Group.
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6 All rights reserved.
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7
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8 Portions Copyright (c) 1980, 1985, 1988, 1989, 1990, 1991, 1993, 1994
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9 The Regents of the University of California.
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10 Portions Copyright (c) 1993, 1994 Washington University in Saint Louis.
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11 Portions Copyright (c) 1996, 1998 Berkeley Software Design, Inc.
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12 Portions Copyright (c) 1989 Massachusetts Institute of Technology.
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13 Portions Copyright (c) 1998 Sendmail, Inc.
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14 Portions Copyright (c) 1983, 1995, 1996, 1997 Eric P. Allman.
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15 Portions Copyright (c) 1997 by Stan Barber.
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16 Portions Copyright (c) 1997 by Kent Landfield.
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17 Portions Copyright (c) 1991, 1992, 1993, 1994, 1995, 1996, 1997
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18 Free Software Foundation, Inc.
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19
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20 Use and distribution of this software and its source code are governed
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21 by the terms and conditions of the WU-FTPD Software License ("LICENSE").
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22
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23 If you did not receive a copy of the license, it may be obtained online
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24 at http://www.wu-ftpd.org/license.html.
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25
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26 $Id: conversions.c,v 1.10 2000/07/01 18:17:38 wuftpd Exp $
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27
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28 ****************************************************************************/
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29 #include "config.h"
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30
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31 #include <stdio.h>
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32 #include <errno.h>
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33 #ifdef HAVE_SYS_SYSLOG_H
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34 #include <sys/syslog.h>
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35 #endif
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36 #if defined(HAVE_SYSLOG_H) || (!defined(AUTOCONF) && !defined(HAVE_SYS_SYSLOG_H))
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37 #include <syslog.h>
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38 #endif
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39
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40 extern char *strsep(char **, const char *);
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41
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42 #include <string.h>
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43 #include <sys/types.h>
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44 #include <sys/stat.h>
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45 #include "conversions.h"
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46 #include "extensions.h"
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47 #include "pathnames.h"
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48 #include "proto.h"
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49
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50 /*************************************************************************/
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51 /* FUNCTION : readconv */
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52 /* PURPOSE : Read the conversions into memory */
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53 /* ARGUMENTS : The pathname of the conversion file */
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54 /* RETURNS : 0 if error, 1 if no error */
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55 /*************************************************************************/
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56
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57 char *convbuf = NULL;
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58 struct convert *cvtptr;
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59
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60 struct str2int {
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61 char *string;
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62 int value;
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63 };
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64
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65 struct str2int c_list[] =
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66 {
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67 {"T_REG", T_REG},
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68 {"T_ASCII", T_ASCII},
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69 {"T_DIR", T_DIR},
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70 {"O_COMPRESS", O_COMPRESS},
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71 {"O_UNCOMPRESS", O_UNCOMPRESS},
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72 {"O_TAR", O_TAR},
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73 {NULL, 0},
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74 };
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75
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76 static int conv(char *str)
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77 {
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78 int rc = 0;
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79 int counter;
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80
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81 /* check for presence of ALL items in string... */
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82
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83 if (str)
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84 for (counter = 0; c_list[counter].string; ++counter)
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85 if (strstr(str, c_list[counter].string))
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86 rc = rc | c_list[counter].value;
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87 return (rc);
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88 }
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89
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90 static int readconv(char *convpath)
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91 {
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92 FILE *convfile;
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93 struct stat finfo;
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94
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95 if ((convfile = fopen(convpath, "r")) == NULL) {
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96 if (errno != ENOENT)
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97 syslog(LOG_ERR, "cannot open conversion file %s: %s",
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98 convpath, strerror(errno));
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99 return (0);
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100 }
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101 if (fstat(fileno(convfile), &finfo) != 0) {
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102 syslog(LOG_ERR, "cannot fstat conversion file %s: %s", convpath,
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103 strerror(errno));
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104 (void) fclose(convfile);
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105 return (0);
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106 }
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107 if (finfo.st_size == 0) {
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108 convbuf = (char *) calloc(1, 1);
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109 }
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110 else {
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111 if (!(convbuf = (char *) malloc((size_t) finfo.st_size + 1))) {
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112 syslog(LOG_ERR, "could not malloc convbuf (%d bytes)", (size_t) finfo.st_size + 1);
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113 (void) fclose(convfile);
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114 return (0);
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115 }
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116 if (!fread(convbuf, (size_t) finfo.st_size, 1, convfile)) {
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117 syslog(LOG_ERR, "error reading conv file %s: %s", convpath,
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118 strerror(errno));
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119 convbuf = NULL;
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120 (void) fclose(convfile);
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121 return (0);
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122 }
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123 *(convbuf + finfo.st_size) = '\0';
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124 }
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125 (void) fclose(convfile);
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126 return (1);
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127 }
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128
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129 static void parseconv(void)
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130 {
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131 char *ptr;
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132 char *convptr = convbuf, *line;
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133 char *argv[8], *p, *val;
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134 struct convert *cptr, *cvttail = (struct convert *) NULL;
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135 int n;
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136
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137 if (!convbuf || !(*convbuf))
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138 return;
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139
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140 /* read through convbuf, stripping comments. */
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141 while (*convptr != '\0') {
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142 line = convptr;
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143 while (*convptr && *convptr != '\n')
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144 convptr++;
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145 *convptr++ = '\0';
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146
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147 /* deal with comments */
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148 if ((ptr = strchr(line, '#')) != NULL)
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149 *ptr = '\0';
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150
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151 if (*line == '\0')
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152 continue;
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153
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154 /* parse the lines... */
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155 for (n = 0, p = line; n < 8 && p != NULL; n++) {
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156 val = (char *) strsep(&p, ":\n");
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157 argv[n] = val;
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158 if ((argv[n][0] == ' ') || (argv[n][0] == '\0'))
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159 argv[n] = NULL;
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160 }
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161 /* check their were 8 fields, if not skip the line... */
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162 if (n != 8 || p != NULL)
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163 continue;
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164
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165 /* make sure the required elements are present */
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166 if ((!argv[0] && !argv[1] && !argv[2] && !argv[3]) || !argv[4] || !argv[7])
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167 continue;
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168
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169 /* add element to end of list */
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170 cptr = (struct convert *) calloc(1, sizeof(struct convert));
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171
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172 if (cptr == NULL) {
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173 syslog(LOG_ERR, "calloc error parsing ftpconversions");
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174 exit(0);
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175 }
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176 if (cvttail)
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177 cvttail->next = cptr;
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178 cvttail = cptr;
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179 if (!cvtptr)
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180 cvtptr = cptr;
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181
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182 cptr->stripprefix = (char *) argv[0];
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183 cptr->stripfix = (char *) argv[1];
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184 cptr->prefix = (char *) argv[2];
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185 cptr->postfix = (char *) argv[3];
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186 cptr->external_cmd = (char *) argv[4];
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187 cptr->types = conv((char *) argv[5]);
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188 cptr->options = conv((char *) argv[6]);
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189 cptr->name = (char *) argv[7];
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190 }
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191 }
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192
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193 void conv_init(void)
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194 {
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195 if ((readconv(_path_cvt)) <= 0)
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196 return;
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197 parseconv();
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198 }
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