projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| 8bb980a3 C |
1 | GETPROTOENT(3) BSD Programmer's Manual GETPROTOENT(3) |
| 2 | ||
| 3 | N\bNA\bAM\bME\bE | |
| 4 | g\bge\bet\btp\bpr\bro\bot\bto\boe\ben\bnt\bt, g\bge\bet\btp\bpr\bro\bot\bto\bob\bby\byn\bnu\bum\bmb\bbe\ber\br, g\bge\bet\btp\bpr\bro\bot\bto\bob\bby\byn\bna\bam\bme\be, s\bse\bet\btp\bpr\bro\bot\bto\boe\ben\bnt\bt, e\ben\bnd\bdp\bpr\bro\bot\bto\boe\ben\bnt\bt - | |
| 5 | get protocol entry | |
| 6 | ||
| 7 | S\bSY\bYN\bNO\bOP\bPS\bSI\bIS\bS | |
| 8 | #\b#i\bin\bnc\bcl\blu\bud\bde\be <\b<n\bne\bet\btd\bdb\bb.\b.h\bh>\b> | |
| 9 | ||
| 10 | _\bs_\bt_\br_\bu_\bc_\bt _\bp_\br_\bo_\bt_\bo_\be_\bn_\bt _\b* | |
| 11 | g\bge\bet\btp\bpr\bro\bot\bto\boe\ben\bnt\bt(); | |
| 12 | ||
| 13 | _\bs_\bt_\br_\bu_\bc_\bt _\bp_\br_\bo_\bt_\bo_\be_\bn_\bt _\b* | |
| 14 | g\bge\bet\btp\bpr\bro\bot\bto\bob\bby\byn\bna\bam\bme\be(_\bc_\bh_\ba_\br _\b*_\bn_\ba_\bm_\be); | |
| 15 | ||
| 16 | _\bs_\bt_\br_\bu_\bc_\bt _\bp_\br_\bo_\bt_\bo_\be_\bn_\bt _\b* | |
| 17 | g\bge\bet\btp\bpr\bro\bot\bto\bob\bby\byn\bnu\bum\bmb\bbe\ber\br(_\bi_\bn_\bt _\bp_\br_\bo_\bt_\bo); | |
| 18 | ||
| 19 | s\bse\bet\btp\bpr\bro\bot\bto\boe\ben\bnt\bt(_\bi_\bn_\bt _\bs_\bt_\ba_\by_\bo_\bp_\be_\bn); | |
| 20 | ||
| 21 | e\ben\bnd\bdp\bpr\bro\bot\bto\boe\ben\bnt\bt(); | |
| 22 | ||
| 23 | D\bDE\bES\bSC\bCR\bRI\bIP\bPT\bTI\bIO\bON\bN | |
| 24 | The g\bge\bet\btp\bpr\bro\bot\bto\boe\ben\bnt\bt(), g\bge\bet\btp\bpr\bro\bot\bto\bob\bby\byn\bna\bam\bme\be(), and g\bge\bet\btp\bpr\bro\bot\bto\bob\bby\byn\bnu\bum\bmb\bbe\ber\br() functions | |
| 25 | each return a pointer to an object with the following structure contain- | |
| 26 | ing the broken-out fields of a line in the network protocol data base, | |
| 27 | _\b/_\be_\bt_\bc_\b/_\bp_\br_\bo_\bt_\bo_\bc_\bo_\bl_\bs. | |
| 28 | ||
| 29 | ||
| 30 | struct protoent { | |
| 31 | char *p_name; /* official name of protocol */ | |
| 32 | char **p_aliases; /* alias list */ | |
| 33 | int p_proto; /* protocol number */ | |
| 34 | }; | |
| 35 | ||
| 36 | The members of this structure are: | |
| 37 | ||
| 38 | _\bp_\b__\bn_\ba_\bm_\be The official name of the protocol. | |
| 39 | ||
| 40 | _\bp_\b__\ba_\bl_\bi_\ba_\bs_\be_\bs A zero terminated list of alternate names for the protocol. | |
| 41 | ||
| 42 | _\bp_\b__\bp_\br_\bo_\bt_\bo The protocol number. | |
| 43 | ||
| 44 | The g\bge\bet\btp\bpr\bro\bot\bto\boe\ben\bnt\bt() function reads the next line of the file, opening the | |
| 45 | file if necessary. | |
| 46 | ||
| 47 | The s\bse\bet\btp\bpr\bro\bot\bto\boe\ben\bnt\bt() function opens and rewinds the file. If the _\bs_\bt_\ba_\by_\bo_\bp_\be_\bn | |
| 48 | flag is non-zero, the net data base will not be closed after each call to | |
| 49 | g\bge\bet\btp\bpr\bro\bot\bto\bob\bby\byn\bna\bam\bme\be() or g\bge\bet\btp\bpr\bro\bot\bto\bob\bby\byn\bnu\bum\bmb\bbe\ber\br(). | |
| 50 | ||
| 51 | The e\ben\bnd\bdp\bpr\bro\bot\bto\boe\ben\bnt\bt() function closes the file. | |
| 52 | ||
| 53 | The g\bge\bet\btp\bpr\bro\bot\bto\bob\bby\byn\bna\bam\bme\be() function and g\bge\bet\btp\bpr\bro\bot\bto\bob\bby\byn\bnu\bum\bmb\bbe\ber\br() sequentially search | |
| 54 | from the beginning of the file until a matching protocol name or protocol | |
| 55 | number is found, or until EOF is encountered. | |
| 56 | ||
| 57 | R\bRE\bET\bTU\bUR\bRN\bN V\bVA\bAL\bLU\bUE\bES\bS | |
| 58 | Null pointer (0) returned on EOF or error. | |
| 59 | ||
| 60 | F\bFI\bIL\bLE\bES\bS | |
| 61 | /etc/protocols | |
| 62 | ||
| 63 | S\bSE\bEE\bE A\bAL\bLS\bSO\bO | |
| 64 | protocols(5) | |
| 65 | ||
| 66 | H\bHI\bIS\bST\bTO\bOR\bRY\bY | |
| 67 | The g\bge\bet\btp\bpr\bro\bot\bto\boe\ben\bnt\bt(), g\bge\bet\btp\bpr\bro\bot\bto\bob\bby\byn\bnu\bum\bmb\bbe\ber\br(), g\bge\bet\btp\bpr\bro\bot\bto\bob\bby\byn\bna\bam\bme\be(), s\bse\bet\btp\bpr\bro\bot\bto\boe\ben\bnt\bt(), | |
| 68 | and e\ben\bnd\bdp\bpr\bro\bot\bto\boe\ben\bnt\bt() functions appeared in 4.2BSD. | |
| 69 | ||
| 70 | B\bBU\bUG\bGS\bS | |
| 71 | These functions use a static data space; if the data is needed for future | |
| 72 | use, it should be copied before any subsequent calls overwrite it. Only | |
| 73 | the Internet protocols are currently understood. | |
| 74 | ||
| 75 | 4.2 Berkeley Distribution June 4, 1993 2 |