tmpfile(3) - Linux manual page (original) (raw)

tmpfile(3) Library Functions Manual tmpfile(3)

NAME top

   tmpfile - create a temporary file

LIBRARY top

   Standard C library (_libc_, _-lc_)

SYNOPSIS top

   **#include <stdio.h>**

   **FILE *tmpfile(void);**

DESCRIPTION top

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

RETURN VALUE top

   The **tmpfile**() function returns a stream descriptor, or NULL if a
   unique filename cannot be generated or the unique file cannot be
   opened.  In the latter case, _[errno](../man3/errno.3.html)_ is set to indicate the error.

ERRORS top

   **EACCES** Search permission denied for directory in file's path
          prefix.

   **EEXIST** Unable to generate a unique filename.

   **EINTR** The call was interrupted by a signal; see [signal(7)](../man7/signal.7.html).

   **EMFILE** The per-process limit on the number of open file
          descriptors has been reached.

   **ENFILE** The system-wide limit on the total number of open files has
          been reached.

   **ENOSPC** There was no room in the directory to add the new filename.

   **EROFS** Read-only filesystem.

ATTRIBUTES top

   For an explanation of the terms used in this section, see
   [attributes(7)](../man7/attributes.7.html).
   ┌──────────────────────────────────────┬───────────────┬─────────┐
   │ **Interface** │ **Attribute** │ **Value** │
   ├──────────────────────────────────────┼───────────────┼─────────┤
   │ **tmpfile**()                            │ Thread safety │ MT-Safe │
   └──────────────────────────────────────┴───────────────┴─────────┘

VERSIONS top

   The standard does not specify the directory that **tmpfile**() will
   use.  glibc will try the path prefix _Ptmpdir_ defined in
   _<stdio.h>_, and if that fails, then the directory _/tmp_.

STANDARDS top

   C11, POSIX.1-2008.

HISTORY top

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

NOTES top

   POSIX.1-2001 specifies: an error message may be written to _stdout_
   if the stream cannot be opened.

SEE ALSO top

   [exit(3)](../man3/exit.3.html), [mkstemp(3)](../man3/mkstemp.3.html), [mktemp(3)](../man3/mktemp.3.html), [tempnam(3)](../man3/tempnam.3.html), [tmpnam(3)](../man3/tmpnam.3.html)

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Linux man-pages 6.10 2024-07-23 tmpfile(3)

Pages that refer to this page:getpid(2), open(2), exit(3), mkdtemp(3), mkstemp(3), mktemp(3), stdio(3), tempnam(3), tmpnam(3)