1 | /* |
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2 | * Copyright (c) 1983, 1993 |
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3 | * The Regents of the University of California. All rights reserved. |
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4 | * |
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5 | * Redistribution and use in source and binary forms, with or without |
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6 | * modification, are permitted provided that the following conditions |
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7 | * are met: |
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8 | * 1. Redistributions of source code must retain the above copyright |
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9 | * notice, this list of conditions and the following disclaimer. |
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10 | * 2. Redistributions in binary form must reproduce the above copyright |
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11 | * notice, this list of conditions and the following disclaimer in the |
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12 | * documentation and/or other materials provided with the distribution. |
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13 | * 3. All advertising materials mentioning features or use of this software |
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14 | * must display the following acknowledgement: |
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15 | * This product includes software developed by the University of |
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16 | * California, Berkeley and its contributors. |
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17 | * 4. Neither the name of the University nor the names of its contributors |
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18 | * may be used to endorse or promote products derived from this software |
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19 | * without specific prior written permission. |
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20 | * |
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21 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
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22 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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23 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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24 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
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25 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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26 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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27 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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28 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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29 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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30 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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31 | * SUCH DAMAGE. |
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32 | */ |
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33 | |
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34 | #if defined(LIBC_SCCS) && !defined(lint) |
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35 | static char sccsid[] = "@(#)getprotoent.c 8.1 (Berkeley) 6/4/93"; |
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36 | #endif /* LIBC_SCCS and not lint */ |
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37 | |
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38 | #include <sys/types.h> |
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39 | #include <sys/socket.h> |
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40 | #include <netdb.h> |
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41 | #include <stdio.h> |
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42 | #include <stdlib.h> |
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43 | #include <string.h> |
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44 | |
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45 | #define MAXALIASES 35 |
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46 | |
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47 | static FILE *protof = NULL; |
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48 | static char line[BUFSIZ+1]; |
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49 | static struct protoent proto; |
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50 | static char *proto_aliases[MAXALIASES]; |
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51 | int _proto_stayopen; |
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52 | |
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53 | void |
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54 | setprotoent(f) |
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55 | int f; |
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56 | { |
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57 | if (protof == NULL) |
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58 | protof = fopen(_PATH_PROTOCOLS, "r" ); |
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59 | else |
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60 | rewind(protof); |
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61 | _proto_stayopen |= f; |
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62 | } |
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63 | |
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64 | void |
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65 | endprotoent() |
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66 | { |
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67 | if (protof) { |
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68 | fclose(protof); |
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69 | protof = NULL; |
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70 | } |
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71 | _proto_stayopen = 0; |
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72 | } |
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73 | |
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74 | struct protoent * |
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75 | getprotoent() |
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76 | { |
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77 | char *p; |
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78 | register char *cp, **q; |
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79 | |
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80 | if (protof == NULL && (protof = fopen(_PATH_PROTOCOLS, "r" )) == NULL) |
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81 | return (NULL); |
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82 | again: |
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83 | if ((p = fgets(line, BUFSIZ, protof)) == NULL) |
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84 | return (NULL); |
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85 | if (*p == '#') |
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86 | goto again; |
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87 | cp = strpbrk(p, "#\n"); |
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88 | if (cp == NULL) |
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89 | goto again; |
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90 | *cp = '\0'; |
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91 | proto.p_name = p; |
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92 | cp = strpbrk(p, " \t"); |
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93 | if (cp == NULL) |
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94 | goto again; |
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95 | *cp++ = '\0'; |
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96 | while (*cp == ' ' || *cp == '\t') |
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97 | cp++; |
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98 | p = strpbrk(cp, " \t"); |
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99 | if (p != NULL) |
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100 | *p++ = '\0'; |
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101 | proto.p_proto = atoi(cp); |
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102 | q = proto.p_aliases = proto_aliases; |
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103 | if (p != NULL) { |
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104 | cp = p; |
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105 | while (cp && *cp) { |
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106 | if (*cp == ' ' || *cp == '\t') { |
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107 | cp++; |
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108 | continue; |
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109 | } |
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110 | if (q < &proto_aliases[MAXALIASES - 1]) |
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111 | *q++ = cp; |
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112 | cp = strpbrk(cp, " \t"); |
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113 | if (cp != NULL) |
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114 | *cp++ = '\0'; |
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115 | } |
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116 | } |
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117 | *q = NULL; |
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118 | return (&proto); |
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119 | } |
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