Rev 4872 | Go to most recent revision | Details | Last modification | View Log | RSS feed
| Rev | Author | Line No. | Line |
|---|---|---|---|
| 4349 | Serge | 1 | /* |
| 2 | FUNCTION |
||
| 3 | < |
||
| 4 | |||
| 5 | INDEX |
||
| 6 | tmpfile |
||
| 7 | INDEX |
||
| 8 | _tmpfile_r |
||
| 9 | |||
| 10 | ANSI_SYNOPSIS |
||
| 11 | #include |
||
| 12 | FILE *tmpfile(void); |
||
| 13 | |||
| 14 | FILE *_tmpfile_r(struct _reent *<[reent]>); |
||
| 15 | |||
| 16 | TRAD_SYNOPSIS |
||
| 17 | #include |
||
| 18 | FILE *tmpfile(); |
||
| 19 | |||
| 20 | FILE *_tmpfile_r(<[reent]>) |
||
| 21 | struct _reent *<[reent]>; |
||
| 22 | |||
| 23 | DESCRIPTION |
||
| 24 | Create a temporary file (a file which will be deleted automatically), |
||
| 25 | using a name generated by < |
||
| 26 | the mode <<"wb+">>, permitting you to read and write anywhere in it |
||
| 27 | as a binary file (without any data transformations the host system may |
||
| 28 | perform for text files). |
||
| 29 | |||
| 30 | The alternate function <<_tmpfile_r>> is a reentrant version. The |
||
| 31 | argument <[reent]> is a pointer to a reentrancy structure. |
||
| 32 | |||
| 33 | RETURNS |
||
| 34 | < |
||
| 35 | temporary file could be created, the result is NULL, and < |
||
| 36 | records the reason for failure. |
||
| 37 | |||
| 38 | PORTABILITY |
||
| 39 | Both ANSI C and the System V Interface Definition (Issue 2) require |
||
| 40 | < |
||
| 41 | |||
| 42 | Supporting OS subroutines required: < |
||
| 43 | < |
||
| 44 | |||
| 45 | < |
||
| 46 | */ |
||
| 47 | |||
| 48 | #include <_ansi.h> |
||
| 49 | #include |
||
| 50 | #include |
||
| 51 | #include |
||
| 52 | #include |
||
| 53 | #include |
||
| 54 | |||
| 55 | #ifndef O_BINARY |
||
| 56 | # define O_BINARY 0 |
||
| 57 | #endif |
||
| 58 | |||
| 59 | FILE * |
||
| 60 | _DEFUN(_tmpfile_r, (ptr), |
||
| 61 | struct _reent *ptr) |
||
| 62 | { |
||
| 63 | FILE *fp; |
||
| 64 | int e; |
||
| 65 | char *f; |
||
| 66 | char buf[L_tmpnam]; |
||
| 67 | int fd; |
||
| 68 | |||
| 69 | do |
||
| 70 | { |
||
| 71 | if ((f = _tmpnam_r (ptr, buf)) == NULL) |
||
| 72 | return NULL; |
||
| 73 | fd = _open_r (ptr, f, O_RDWR | O_CREAT | O_EXCL | O_BINARY, |
||
| 74 | S_IRUSR | S_IWUSR); |
||
| 75 | } |
||
| 76 | while (fd < 0 && ptr->_errno == EEXIST); |
||
| 77 | if (fd < 0) |
||
| 78 | return NULL; |
||
| 79 | fp = _fdopen_r (ptr, fd, "wb+"); |
||
| 80 | e = ptr->_errno; |
||
| 81 | if (!fp) |
||
| 82 | _close_r (ptr, fd); |
||
| 83 | _CAST_VOID _remove_r (ptr, f); |
||
| 84 | ptr->_errno = e; |
||
| 85 | return fp; |
||
| 86 | } |
||
| 87 | |||
| 88 | #ifndef _REENT_ONLY |
||
| 89 | |||
| 90 | FILE * |
||
| 91 | _DEFUN_VOID(tmpfile) |
||
| 92 | { |
||
| 93 | return _tmpfile_r (_REENT); |
||
| 94 | } |
||
| 95 | |||
| 96 | #endif |