mirror of
https://github.com/fluencelabs/musl
synced 2025-05-21 19:51:31 +00:00
60158bff74
this condition could only happen due to malloc failure. the fdopen operation is also moved to take place after the unlink to minimize the window during which a link to the file exists in the directory table.
33 lines
538 B
C
33 lines
538 B
C
#include <stdio.h>
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#include <fcntl.h>
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#include "stdio_impl.h"
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#define MAXTRIES 100
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char *__randname(char *);
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FILE *tmpfile(void)
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{
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char s[] = "/tmp/tmpfile_XXXXXX";
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int fd;
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FILE *f;
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int try;
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for (try=0; try<MAXTRIES; try++) {
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__randname(s+13);
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fd = sys_open(s, O_RDWR|O_CREAT|O_EXCL, 0600);
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if (fd >= 0) {
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#ifdef SYS_unlink
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__syscall(SYS_unlink, s);
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#else
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__syscall(SYS_unlinkat, AT_FDCWD, s, 0);
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#endif
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f = __fdopen(fd, "w+");
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if (!f) __syscall(SYS_close, fd);
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return f;
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}
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}
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return 0;
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}
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LFS64(tmpfile);
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