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| Commit | Line | Data |
|---|---|---|
| 8bb980a3 C |
1 | GETNETENT(3) BSD Programmer's Manual GETNETENT(3) |
| 2 | ||
| 3 | N\bNA\bAM\bME\bE | |
| 4 | g\bge\bet\btn\bne\bet\bte\ben\bnt\bt, g\bge\bet\btn\bne\bet\btb\bby\bya\bad\bdd\bdr\br, g\bge\bet\btn\bne\bet\btb\bby\byn\bna\bam\bme\be, s\bse\bet\btn\bne\bet\bte\ben\bnt\bt, e\ben\bnd\bdn\bne\bet\bte\ben\bnt\bt - get network | |
| 5 | 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 _\bn_\be_\bt_\be_\bn_\bt _\b* | |
| 11 | g\bge\bet\btn\bne\bet\bte\ben\bnt\bt(); | |
| 12 | ||
| 13 | _\bs_\bt_\br_\bu_\bc_\bt _\bn_\be_\bt_\be_\bn_\bt _\b* | |
| 14 | g\bge\bet\btn\bne\bet\btb\bby\byn\bna\bam\bme\be(_\bc_\bh_\ba_\br _\b*_\bn_\ba_\bm_\be); | |
| 15 | ||
| 16 | _\bs_\bt_\br_\bu_\bc_\bt _\bn_\be_\bt_\be_\bn_\bt _\b* | |
| 17 | g\bge\bet\btn\bne\bet\btb\bby\bya\bad\bdd\bdr\br(_\bl_\bo_\bn_\bg _\bn_\be_\bt, _\bi_\bn_\bt _\bt_\by_\bp_\be); | |
| 18 | ||
| 19 | s\bse\bet\btn\bne\bet\bte\ben\bnt\bt(_\bi_\bn_\bt _\bs_\bt_\ba_\by_\bo_\bp_\be_\bn); | |
| 20 | ||
| 21 | e\ben\bnd\bdn\bne\bet\bte\ben\bnt\bt(); | |
| 22 | ||
| 23 | D\bDE\bES\bSC\bCR\bRI\bIP\bPT\bTI\bIO\bON\bN | |
| 24 | The g\bge\bet\btn\bne\bet\bte\ben\bnt\bt(), g\bge\bet\btn\bne\bet\btb\bby\byn\bna\bam\bme\be(), and g\bge\bet\btn\bne\bet\btb\bby\bya\bad\bdd\bdr\br() functions each return | |
| 25 | a pointer to an object with the following structure containing the bro- | |
| 26 | ken-out fields of a line in the network data base, _\b/_\be_\bt_\bc_\b/_\bn_\be_\bt_\bw_\bo_\br_\bk_\bs. | |
| 27 | ||
| 28 | struct netent { | |
| 29 | char *n_name; /* official name of net */ | |
| 30 | char **n_aliases; /* alias list */ | |
| 31 | int n_addrtype; /* net number type */ | |
| 32 | unsigned long n_net; /* net number */ | |
| 33 | }; | |
| 34 | ||
| 35 | The members of this structure are: | |
| 36 | ||
| 37 | _\bn_\b__\bn_\ba_\bm_\be The official name of the network. | |
| 38 | ||
| 39 | _\bn_\b__\ba_\bl_\bi_\ba_\bs_\be_\bs A zero terminated list of alternate names for the network. | |
| 40 | ||
| 41 | _\bn_\b__\ba_\bd_\bd_\br_\bt_\by_\bp_\be The type of the network number returned; currently only | |
| 42 | AF_INET. | |
| 43 | ||
| 44 | _\bn_\b__\bn_\be_\bt The network number. Network numbers are returned in machine | |
| 45 | byte order. | |
| 46 | ||
| 47 | The g\bge\bet\btn\bne\bet\bte\ben\bnt\bt() function reads the next line of the file, opening the | |
| 48 | file if necessary. | |
| 49 | ||
| 50 | The s\bse\bet\btn\bne\bet\bte\ben\bnt\bt() function opens and rewinds the file. If the _\bs_\bt_\ba_\by_\bo_\bp_\be_\bn | |
| 51 | flag is non-zero, the net data base will not be closed after each call to | |
| 52 | g\bge\bet\btn\bne\bet\btb\bby\byn\bna\bam\bme\be() or g\bge\bet\btn\bne\bet\btb\bby\bya\bad\bdd\bdr\br(). | |
| 53 | ||
| 54 | The e\ben\bnd\bdn\bne\bet\bte\ben\bnt\bt() function closes the file. | |
| 55 | ||
| 56 | The g\bge\bet\btn\bne\bet\btb\bby\byn\bna\bam\bme\be() function and g\bge\bet\btn\bne\bet\btb\bby\bya\bad\bdd\bdr\br() sequentially search from | |
| 57 | the beginning of the file until a matching net name or net address and | |
| 58 | type is found, or until EOF is encountered. Network numbers are supplied | |
| 59 | in host order. | |
| 60 | ||
| 61 | F\bFI\bIL\bLE\bES\bS | |
| 62 | /etc/networks | |
| 63 | ||
| 64 | D\bDI\bIA\bAG\bGN\bNO\bOS\bST\bTI\bIC\bCS\bS | |
| 65 | Null pointer (0) returned on EOF or error. | |
| 66 | ||
| 67 | S\bSE\bEE\bE A\bAL\bLS\bSO\bO | |
| 68 | networks(5) | |
| 69 | ||
| 70 | H\bHI\bIS\bST\bTO\bOR\bRY\bY | |
| 71 | The g\bge\bet\btn\bne\bet\bte\ben\bnt\bt(), g\bge\bet\btn\bne\bet\btb\bby\bya\bad\bdd\bdr\br(), g\bge\bet\btn\bne\bet\btb\bby\byn\bna\bam\bme\be(), s\bse\bet\btn\bne\bet\bte\ben\bnt\bt(), and | |
| 72 | e\ben\bnd\bdn\bne\bet\bte\ben\bnt\bt() functions appeared in 4.2BSD. | |
| 73 | ||
| 74 | B\bBU\bUG\bGS\bS | |
| 75 | The data space used by these functions is static; if future use requires | |
| 76 | the data, it should be copied before any subsequent calls to these func- | |
| 77 | tions overwrite it. Only Internet network numbers are currently under- | |
| 78 | stood. Expecting network numbers to fit in no more than 32 bits is prob- | |
| 79 | ably naive. | |
| 80 | ||
| 81 | 4.2 Berkeley Distribution June 4, 1993 2 |