1posix_spawn_file_actions_aSdtdacnldoasred(3CC)LibrarpyosFiuxn_cstpiaownns_file_actions_addclose(3C)
2
6 posix_spawn_file_actions_addclose, posix_spawn_file_actions_addopen -
7 add close or open action to spawn file actions object
8
10 #include <spawn.h>
11 int posix_spawn_file_actions_addclose(
13 posix_spawn_file_actions_t *file_actions, int fildes);
14 int posix_spawn_file_actions_addopen(
17 posix_spawn_file_actions_t *restrict file_actions, int fildes,
18 const char *restrict path, int oflag, mode_t mode);
19
22 These functions add or delete a close or open action to a spawn file
23 actions object.
24 A spawn file actions object is of type posix_spawn_file_actions_t
27 (defined in <spawn.h>) and is used to specify a series of actions to be
28 performed by a posix_spawn(3C) or posix_spawn(3C) operation to arrive
29 at the set of open file descriptors for the child process given the set
30 of open file descriptors of the parent.
31 A spawn file actions object, when passed to posix_spawn() or
34 posix_spawnp(), specifies how the set of open file descriptors in the
35 calling process is transformed into a set of potentially open file
36 descriptors for the spawned process. This transformation occurs as
37 though the specified sequence of actions was performed exactly once, in
38 the context of the spawned process (prior to execution of the new
39 process image), in the order in which the actions were added to the
40 object. Additionally, when the new process image is executed, any file
41 descriptor (from this new set) which has its FD_CLOEXEC flag set is
42 closed (see posix_spawn(3C)).
43 The posix_spawn_file_actions_addclose() function adds a close action to
46 the object referenced by file_actions that causes the file descriptor
47 fildes to be closed (as if close(fildes) had been called) when a new
48 process is spawned using this file actions object.
49 The posix_spawn_file_actions_addopen() function adds an open action to
52 the object referenced by file_actions that causes the file named by
53 path to be opened (as if open(path, oflag, mode) had been called, and
54 the returned file descriptor, if not fildes, had been changed to
55 fildes) when a new process is spawned using this file actions object.
56 If fildes was already an open file descriptor, it is closed before the
57 new file is opened.
58 The string described by path is copied by the
61 posix_spawn_file_actions_addopen() function.
62
64 Upon successful completion, these functions return 0. Otherwise, an
65 error number is returned to indicate the error.
66
68 These functions will fail if:
69 EBADF The value specified by fildes is negative or greater than or
71 equal to {OPEN_MAX}.
72 These functions may fail if:
76 EINVAL The value specified by file_actions is invalid.
78 ENOMEM Insufficient memory exists to add to the spawn file actions
81 object.
82 It is not considered an error for the fildes argument passed to these
86 functions to specify a file descriptor for which the specified opera‐
87 tion could not be performed at the time of the call. Any such error
88 will be detected when the associated file actions object is later used
89 during a posix_spawn() or posix_spawnp() operation.
90 If a close(2) operation is specified for a file descriptor that is not
93 open at the time of the call to posix_spawn() or posix_spawnp(), the
94 close operation will not cause the posix_spawn() or posix_spawnp()
95 operation to fail.
96
98 See attributes(5) for descriptions of the following attributes:
99 ┌─────────────────────────────┬─────────────────────────────┐
104 │ ATTRIBUTE TYPE │ ATTRIBUTE VALUE │
105 ├─────────────────────────────┼─────────────────────────────┤
106 │Interface Stability │Committed │
107 ├─────────────────────────────┼─────────────────────────────┤
108 │MT-Level │MT-Safe │
109 ├─────────────────────────────┼─────────────────────────────┤
110 │Standard │See standards(5). │
111 └─────────────────────────────┴─────────────────────────────┘
112
114 close(2), dup(2), open(2), posix_spawn(3C),
115 posix_spawn_file_actions_adddup2(3C),
116 posix_spawn_file_actions_destroy(3C), attributes(5), standards(5)
117SunOS 5.11 20 Feb 2p0o0s9ix_spawn_file_actions_addclose(3C)