41 lines
1.3 KiB
C
41 lines
1.3 KiB
C
/*
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* Copyright (c) 2013, 2015 Jonas 'Sortie' Termansen.
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*
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* stdio/tmpfile.c
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* Opens an unnamed temporary file.
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*/
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#include <sys/types.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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FILE* tmpfile(void)
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{
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// TODO: There is a short interval during which other processes can access
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// this file. Implement and use O_TMPFILE.
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char path[] = "/tmp/tmp.XXXXXX";
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int fd = mkstemp(path);
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if ( fd < 0 )
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return (FILE*) NULL;
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if ( unlink(path) < 0 )
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return close(fd), (FILE*) NULL;
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FILE* fp = fdopen(fd, "r+");
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if ( !fp )
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return close(fd), (FILE*) NULL;
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return fp;
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}
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