Mercurial > dovecot > core-2.2

annotate src/lib/hostpid.c @ 23007:36e01285b5b8

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lib: buffer - Improve header comment for buffer_insert() and buffer_delete().
author Stephan Bosch <stephan.bosch@dovecot.fi>
date Mon, 18 Mar 2019 00:52:37 +0100
parents cb108f786fb4
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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cb108f786fb4 Updated copyright notices to include the year 2018.
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1 /* Copyright (c) 2002-2018 Dovecot authors, see the included COPYING file */
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3 #include "lib.h"
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4 #include "hostpid.h"
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5
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6 #include <unistd.h>
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7 #include <netdb.h>
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8
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9 #define HOSTNAME_DISALLOWED_CHARS "/\r\n\t"
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10
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11 const char *my_hostname = NULL;
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12 const char *my_pid = NULL;
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13
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14 static char *my_hostname_dup = NULL;
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15 static char *my_domain = NULL;
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16
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17 void hostpid_init(void)
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18 {
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19 static char pid[MAX_INT_STRLEN];
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20 char hostname[256];
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21 const char *value;
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22
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23 /* allow calling hostpid_init() multiple times to reset hostname */
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24 i_free_and_null(my_hostname_dup);
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25 i_free_and_null(my_domain);
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26
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27 value = getenv(MY_HOSTNAME_ENV);
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28 if (value == NULL) {
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29 if (gethostname(hostname, sizeof(hostname)-1) < 0)
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30 i_fatal("gethostname() failed: %m");
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31 hostname[sizeof(hostname)-1] = '\0';
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32 value = hostname;
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33 }
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34
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35 if (value[0] == '\0' ||
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36 strcspn(value, HOSTNAME_DISALLOWED_CHARS) != strlen(value))
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37 i_fatal("Invalid system hostname: '%s'", value);
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38 my_hostname_dup = i_strdup(value);
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39 my_hostname = my_hostname_dup;
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40
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41 i_snprintf(pid, sizeof(pid), "%lld", (long long)getpid());
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42 my_pid = pid;
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43 }
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44
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45 void hostpid_deinit(void)
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46 {
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47 i_free(my_hostname_dup);
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48 i_free(my_domain);
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49 }
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50
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51 const char *my_hostdomain(void)
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52 {
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53 struct hostent *hent;
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54 const char *name;
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55
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56 if (my_domain == NULL) {
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57 name = getenv(MY_HOSTDOMAIN_ENV);
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58 if (name == NULL) {
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59 hent = gethostbyname(my_hostname);
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60 name = hent != NULL ? hent->h_name : NULL;
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61 if (name == NULL) {
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62 /* failed, use just the hostname */
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63 name = my_hostname;
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64 }
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65 }
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66 my_domain = i_strdup(name);
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67 }
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68 return my_domain;
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69 }