1tmpfile(3)                 Library Functions Manual                 tmpfile(3)
2
3
4

NAME

6       tmpfile - create a temporary file
7

LIBRARY

9       Standard C library (libc, -lc)
10

SYNOPSIS

12       #include <stdio.h>
13
14       FILE *tmpfile(void);
15

DESCRIPTION

17       The  tmpfile()  function  opens  a  unique  temporary  file  in  binary
18       read/write (w+b) mode.  The file will be automatically deleted when  it
19       is closed or the program terminates.
20

RETURN VALUE

22       The tmpfile() function returns a stream descriptor, or NULL if a unique
23       filename cannot be generated or the unique file cannot be  opened.   In
24       the latter case, errno is set to indicate the error.
25

ERRORS

27       EACCES Search permission denied for directory in file's path prefix.
28
29       EEXIST Unable to generate a unique filename.
30
31       EINTR  The call was interrupted by a signal; see signal(7).
32
33       EMFILE The per-process limit on the number of open file descriptors has
34              been reached.
35
36       ENFILE The system-wide limit on the total number of open files has been
37              reached.
38
39       ENOSPC There was no room in the directory to add the new filename.
40
41       EROFS  Read-only filesystem.
42

ATTRIBUTES

44       For  an  explanation  of  the  terms  used  in  this  section,  see at‐
45       tributes(7).
46
47       ┌────────────────────────────────────────────┬───────────────┬─────────┐
48Interface                                   Attribute     Value   
49       ├────────────────────────────────────────────┼───────────────┼─────────┤
50tmpfile()                                   │ Thread safety │ MT-Safe │
51       └────────────────────────────────────────────┴───────────────┴─────────┘
52

VERSIONS

54       The standard does not specify the directory that  tmpfile()  will  use.
55       glibc  will  try  the path prefix P_tmpdir defined in <stdio.h>, and if
56       that fails, then the directory /tmp.
57

STANDARDS

59       C11, POSIX.1-2008.
60

HISTORY

62       POSIX.1-2001, C89, SVr4, 4.3BSD, SUSv2.
63

NOTES

65       POSIX.1-2001 specifies: an error message may be written  to  stdout  if
66       the stream cannot be opened.
67

SEE ALSO

69       exit(3), mkstemp(3), mktemp(3), tempnam(3), tmpnam(3)
70
71
72
73Linux man-pages 6.05              2023-07-20                        tmpfile(3)
Impressum