diff options
Diffstat (limited to 'man3/inet_net_pton.3')
| -rw-r--r-- | man3/inet_net_pton.3 | 38 |
1 files changed, 17 insertions, 21 deletions
diff --git a/man3/inet_net_pton.3 b/man3/inet_net_pton.3 index bffa27b71..2a744419b 100644 --- a/man3/inet_net_pton.3 +++ b/man3/inet_net_pton.3 @@ -2,7 +2,7 @@ .\" .\" SPDX-License-Identifier: Linux-man-pages-copyleft .\" -.TH inet_net_pton 3 2023-02-05 "Linux man-pages 6.03" +.TH inet_net_pton 3 2023-05-03 "Linux man-pages 6.05.01" .SH NAME inet_net_pton, inet_net_ntop \- Internet network number conversion .SH LIBRARY @@ -132,11 +132,7 @@ The size of the output buffer was insufficient. .I pres was not in correct presentation format. .SH STANDARDS -The -.BR inet_net_pton () -and -.BR inet_net_ntop () -functions are nonstandard, but widely available. +None. .SH NOTES .SS Input presentation format for inet_net_pton() The network number may be specified either @@ -311,59 +307,59 @@ Raw address: c1a80180 .\" SRC BEGIN (inet_net_pton.c) .EX /* Link with "\-lresolv" */ - +\& #include <arpa/inet.h> #include <stdio.h> #include <stdlib.h> - +\& #define errExit(msg) do { perror(msg); exit(EXIT_FAILURE); \e } while (0) - +\& int main(int argc, char *argv[]) { char buf[100]; struct in_addr addr; int bits; - +\& if (argc < 2) { fprintf(stderr, "Usage: %s presentation\-form [addr\-init\-value]\en", argv[0]); exit(EXIT_FAILURE); } - +\& /* If argv[2] is supplied (a numeric value), use it to initialize the output buffer given to inet_net_pton(), so that we can see that inet_net_pton() initializes only those bytes needed for the network number. If argv[2] is not supplied, then initialize the buffer to zero (as is recommended practice). */ - +\& addr.s_addr = (argc > 2) ? strtod(argv[2], NULL) : 0; - +\& /* Convert presentation network number in argv[1] to binary. */ - +\& bits = inet_net_pton(AF_INET, argv[1], &addr, sizeof(addr)); if (bits == \-1) errExit("inet_net_ntop"); - +\& printf("inet_net_pton() returned: %d\en", bits); - +\& /* Convert binary format back to presentation, using \[aq]bits\[aq] returned by inet_net_pton(). */ - +\& if (inet_net_ntop(AF_INET, &addr, bits, buf, sizeof(buf)) == NULL) errExit("inet_net_ntop"); - +\& printf("inet_net_ntop() yielded: %s\en", buf); - +\& /* Display \[aq]addr\[aq] in raw form (in network byte order), so we can see bytes not displayed by inet_net_ntop(); some of those bytes may not have been touched by inet_net_ntop(), and so will still have any initial value that was specified in argv[2]. */ - +\& printf("Raw address: %x\en", htonl(addr.s_addr)); - +\& exit(EXIT_SUCCESS); } .EE |