projects / unix-history / blame
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1 | .\" Copyright (c) 1983 The Regents of the University of California. |
| 2 | .\" All rights reserved. | |
| d148e37f | 3 | .\" |
| 91cff1e1 | 4 | .\" %sccs.include.redist.man% |
| d148e37f | 5 | .\" |
| 91cff1e1 | 6 | .\" @(#)getprotoent.3 6.5 (Berkeley) %G% |
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7 | .\" |
| 8 | .TH GETPROTOENT 3 "" | |
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9 | .UC 5 |
| 10 | .SH NAME | |
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11 | getprotoent, getprotobynumber, getprotobyname, setprotoent, |
| 12 | endprotoent \- get protocol entry | |
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13 | .SH SYNOPSIS |
| 14 | .nf | |
| 15 | .ft B | |
| 16 | .B #include <netdb.h> | |
| 17 | .PP | |
| 18 | .ft B | |
| 19 | struct protoent *getprotoent() | |
| 20 | .PP | |
| 21 | .ft B | |
| 22 | struct protoent *getprotobyname(name) | |
| 23 | char *name; | |
| 24 | .PP | |
| 25 | .ft B | |
| 26 | struct protoent *getprotobynumber(proto) | |
| 27 | int proto; | |
| 28 | .PP | |
| 29 | .ft B | |
| 30 | setprotoent(stayopen) | |
| 31 | int stayopen | |
| 32 | .PP | |
| 33 | .ft B | |
| 34 | endprotoent() | |
| 35 | .fi | |
| 36 | .SH DESCRIPTION | |
| 37 | .IR Getprotoent , | |
| 38 | .IR getprotobyname , | |
| 39 | and | |
| 40 | .I getprotobynumber | |
| 41 | each return a pointer to an object with the | |
| 42 | following structure | |
| 43 | containing the broken-out | |
| 44 | fields of a line in the network protocol data base, | |
| 45 | .IR /etc/protocols . | |
| 46 | .RS | |
| 47 | .PP | |
| 48 | .nf | |
| 49 | struct protoent { | |
| 50 | char *p_name; /* official name of protocol */ | |
| 51 | char **p_aliases; /* alias list */ | |
| 50159ed7 | 52 | int p_proto; /* protocol number */ |
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53 | }; |
| 54 | .ft R | |
| 55 | .ad | |
| 56 | .fi | |
| 57 | .RE | |
| 58 | .PP | |
| 59 | The members of this structure are: | |
| 60 | .TP \w'p_aliases'u+2n | |
| 61 | p_name | |
| 62 | The official name of the protocol. | |
| 63 | .TP \w'p_aliases'u+2n | |
| 64 | p_aliases | |
| 65 | A zero terminated list of alternate names for the protocol. | |
| 66 | .TP \w'p_aliases'u+2n | |
| 67 | p_proto | |
| 68 | The protocol number. | |
| 69 | .PP | |
| 70 | .I Getprotoent | |
| 71 | reads the next line of the file, opening the file if necessary. | |
| 72 | .PP | |
| 73 | .I Setprotoent | |
| 74 | opens and rewinds the file. If the | |
| 75 | .I stayopen | |
| 76 | flag is non-zero, | |
| 77 | the net data base will not be closed after each call to | |
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78 | .I getprotobyname |
| 79 | or | |
| 80 | .IR getprotobynumber . | |
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81 | .PP |
| 82 | .I Endprotoent | |
| 83 | closes the file. | |
| 84 | .PP | |
| 85 | .I Getprotobyname | |
| 86 | and | |
| 87 | .I getprotobynumber | |
| 88 | sequentially search from the beginning | |
| 89 | of the file until a matching | |
| 90 | protocol name or | |
| 91 | protocol number is found, | |
| 92 | or until EOF is encountered. | |
| 93 | .SH FILES | |
| 94 | /etc/protocols | |
| 95 | .SH "SEE ALSO" | |
| 96 | protocols(5) | |
| 97 | .SH DIAGNOSTICS | |
| 98 | Null pointer | |
| 99 | (0) returned on EOF or error. | |
| 100 | .SH BUGS | |
| 101 | All information | |
| 102 | is contained in a static area | |
| 103 | so it must be copied if it is | |
| 104 | to be saved. Only the Internet | |
| 105 | protocols are currently understood. |