diff options
Diffstat (limited to 'man3/getservent_r.3')
| -rw-r--r-- | man3/getservent_r.3 | 41 |
1 files changed, 20 insertions, 21 deletions
diff --git a/man3/getservent_r.3 b/man3/getservent_r.3 index d46d3d8c1..04397ee83 100644 --- a/man3/getservent_r.3 +++ b/man3/getservent_r.3 @@ -4,7 +4,7 @@ .\" .\" SPDX-License-Identifier: Linux-man-pages-copyleft .\" -.TH getservent_r 3 2023-02-05 "Linux man-pages 6.03" +.TH getservent_r 3 2023-07-20 "Linux man-pages 6.05.01" .SH NAME getservent_r, getservbyname_r, getservbyport_r \- get service entry (reentrant) @@ -118,26 +118,25 @@ Try again with a larger buffer .SH ATTRIBUTES For an explanation of the terms used in this section, see .BR attributes (7). -.ad l -.nh .TS allbox; lbx lb lb l l l. Interface Attribute Value T{ +.na +.nh .BR getservent_r (), .BR getservbyname_r (), .BR getservbyport_r () T} Thread safety MT-Safe locale .TE -.hy -.ad .sp 1 -.SH STANDARDS -These functions are GNU extensions. +.SH VERSIONS Functions with similar names exist on some other systems, though typically with different calling signatures. +.SH STANDARDS +GNU. .SH EXAMPLES The program below uses .BR getservbyport_r () @@ -175,9 +174,9 @@ Call failed/record not found #include <stdio.h> #include <stdlib.h> #include <string.h> - +\& #define MAX_BUF 10000 - +\& int main(int argc, char *argv[]) { @@ -186,25 +185,25 @@ main(int argc, char *argv[]) struct servent *result; char buf[MAX_BUF]; char *protop; - +\& if (argc < 3) { printf("Usage: %s port\-num proto\-name [buflen]\en", argv[0]); exit(EXIT_FAILURE); } - +\& port = htons(atoi(argv[1])); protop = (strcmp(argv[2], "null") == 0 || strcmp(argv[2], "NULL") == 0) ? NULL : argv[2]; - +\& buflen = 1024; if (argc > 3) buflen = atoi(argv[3]); - +\& if (buflen > MAX_BUF) { printf("Exceeded buffer limit (%d)\en", MAX_BUF); exit(EXIT_FAILURE); } - +\& erange_cnt = 0; do { s = getservbyport_r(port, protop, &result_buf, @@ -213,35 +212,35 @@ main(int argc, char *argv[]) if (erange_cnt == 0) printf("ERANGE! Retrying with larger buffer\en"); erange_cnt++; - +\& /* Increment a byte at a time so we can see exactly what size buffer was required. */ - +\& buflen++; - +\& if (buflen > MAX_BUF) { printf("Exceeded buffer limit (%d)\en", MAX_BUF); exit(EXIT_FAILURE); } } } while (s == ERANGE); - +\& printf("getservbyport_r() returned: %s (buflen=%d)\en", (s == 0) ? "0 (success)" : (s == ENOENT) ? "ENOENT" : strerror(s), buflen); - +\& if (s != 0 || result == NULL) { printf("Call failed/record not found\en"); exit(EXIT_FAILURE); } - +\& printf("s_name=%s; s_proto=%s; s_port=%d; aliases=", result_buf.s_name, result_buf.s_proto, ntohs(result_buf.s_port)); for (char **p = result_buf.s_aliases; *p != NULL; p++) printf("%s ", *p); printf("\en"); - +\& exit(EXIT_SUCCESS); } .EE |