s3:lib/events: s/EVENT_FD/TEVENT_FD
[Samba/gebeck_regimport.git] / lib / tevent / tevent_util.c
blob16af8f3b908d8c0502a18403ac70a0b476df1419
1 /*
2 Unix SMB/CIFS implementation.
4 Copyright (C) Andrew Tridgell 2005
5 Copyright (C) Jelmer Vernooij 2005
7 ** NOTE! The following LGPL license applies to the tevent
8 ** library. This does NOT imply that all of Samba is released
9 ** under the LGPL
11 This library is free software; you can redistribute it and/or
12 modify it under the terms of the GNU Lesser General Public
13 License as published by the Free Software Foundation; either
14 version 3 of the License, or (at your option) any later version.
16 This library is distributed in the hope that it will be useful,
17 but WITHOUT ANY WARRANTY; without even the implied warranty of
18 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
19 Lesser General Public License for more details.
21 You should have received a copy of the GNU Lesser General Public
22 License along with this library; if not, see <http://www.gnu.org/licenses/>.
25 #include "replace.h"
26 #include "talloc.h"
27 #include "tevent.h"
28 #include "tevent_internal.h"
29 #include "tevent_util.h"
30 #include <fcntl.h>
32 /**
33 return the number of elements in a string list
35 size_t ev_str_list_length(const char **list)
37 size_t ret;
38 for (ret=0;list && list[ret];ret++) /* noop */ ;
39 return ret;
42 /**
43 add an entry to a string list
45 const char **ev_str_list_add(const char **list, const char *s)
47 size_t len = ev_str_list_length(list);
48 const char **ret;
50 ret = talloc_realloc(NULL, list, const char *, len+2);
51 if (ret == NULL) return NULL;
53 ret[len] = talloc_strdup(ret, s);
54 if (ret[len] == NULL) return NULL;
56 ret[len+1] = NULL;
58 return ret;
62 /**
63 Set a fd into blocking/nonblocking mode. Uses POSIX O_NONBLOCK if available,
64 else
65 if SYSV use O_NDELAY
66 if BSD use FNDELAY
67 **/
69 int ev_set_blocking(int fd, bool set)
71 int val;
72 #ifdef O_NONBLOCK
73 #define FLAG_TO_SET O_NONBLOCK
74 #else
75 #ifdef SYSV
76 #define FLAG_TO_SET O_NDELAY
77 #else /* BSD */
78 #define FLAG_TO_SET FNDELAY
79 #endif
80 #endif
82 if((val = fcntl(fd, F_GETFL, 0)) == -1)
83 return -1;
84 if(set) /* Turn blocking on - ie. clear nonblock flag */
85 val &= ~FLAG_TO_SET;
86 else
87 val |= FLAG_TO_SET;
88 return fcntl( fd, F_SETFL, val);
89 #undef FLAG_TO_SET
92 bool ev_set_close_on_exec(int fd)
94 #ifdef FD_CLOEXEC
95 int val;
97 val = fcntl(fd, F_GETFD, 0);
98 if (val >= 0) {
99 val |= FD_CLOEXEC;
100 val = fcntl(fd, F_SETFD, val);
101 if (val != -1) {
102 return true;
105 #endif
106 return false;