Rev 4921 | Details | Compare with Previous | Last modification | View Log | RSS feed
| Rev | Author | Line No. | Line |
|---|---|---|---|
| 4349 | Serge | 1 | /* |
| 2 | * Copyright (c) 1990 Regents of the University of California. |
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| 3 | * All rights reserved. |
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| 4 | * |
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| 5 | * Redistribution and use in source and binary forms are permitted |
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| 6 | * provided that the above copyright notice and this paragraph are |
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| 7 | * duplicated in all such forms and that any documentation, |
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| 8 | * advertising materials, and other materials related to such |
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| 9 | * distribution and use acknowledge that the software was developed |
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| 10 | * by the University of California, Berkeley. The name of the |
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| 11 | * University may not be used to endorse or promote products derived |
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| 12 | * from this software without specific prior written permission. |
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| 13 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR |
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| 14 | * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED |
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| 15 | * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. |
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| 16 | */ |
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| 17 | /* No user fns here. Pesch 15apr92 */ |
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| 18 | |||
| 19 | #include <_ansi.h> |
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| 20 | #include |
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| 21 | #include |
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| 22 | #include |
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| 23 | #include |
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| 24 | #include |
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| 25 | |||
| 26 | /* |
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| 27 | * Return the (stdio) flags for a given mode. Store the flags |
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| 28 | * to be passed to an open() syscall through *optr. |
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| 29 | * Return 0 on error. |
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| 30 | */ |
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| 31 | |||
| 32 | int |
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| 33 | _DEFUN(__sflags, (ptr, mode, optr), |
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| 34 | struct _reent *ptr _AND |
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| 35 | register char *mode _AND |
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| 36 | int *optr) |
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| 37 | { |
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| 38 | register int ret, m, o; |
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| 39 | |||
| 40 | switch (mode[0]) |
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| 41 | { |
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| 42 | case 'r': /* open for reading */ |
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| 43 | ret = __SRD; |
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| 44 | m = O_RDONLY; |
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| 45 | o = 0; |
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| 46 | break; |
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| 47 | |||
| 48 | case 'w': /* open for writing */ |
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| 49 | ret = __SWR; |
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| 50 | m = O_WRONLY; |
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| 51 | o = O_CREAT | O_TRUNC; |
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| 52 | break; |
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| 53 | |||
| 54 | case 'a': /* open for appending */ |
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| 55 | ret = __SWR | __SAPP; |
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| 56 | m = O_WRONLY; |
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| 57 | o = O_CREAT | O_APPEND; |
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| 58 | break; |
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| 59 | default: /* illegal mode */ |
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| 60 | ptr->_errno = EINVAL; |
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| 61 | return (0); |
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| 62 | } |
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| 4921 | Serge | 63 | while (*++mode) |
| 4349 | Serge | 64 | { |
| 4921 | Serge | 65 | switch (*mode) |
| 66 | { |
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| 67 | case '+': |
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| 6099 | serge | 68 | ret = (ret & ~(__SRD | __SWR)) | __SRW; |
| 4921 | Serge | 69 | m = (m & ~O_ACCMODE) | O_RDWR; |
| 70 | break; |
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| 71 | case 'b': |
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| 4349 | Serge | 72 | #ifdef O_BINARY |
| 6099 | serge | 73 | m |= O_BINARY; |
| 4349 | Serge | 74 | #endif |
| 4921 | Serge | 75 | break; |
| 4349 | Serge | 76 | #ifdef __CYGWIN__ |
| 4921 | Serge | 77 | case 't': |
| 78 | m |= O_TEXT; |
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| 79 | break; |
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| 4349 | Serge | 80 | #endif |
| 4921 | Serge | 81 | #if defined (O_CLOEXEC) && defined (_GLIBC_EXTENSION) |
| 82 | case 'e': |
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| 83 | m |= O_CLOEXEC; |
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| 84 | break; |
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| 85 | #endif |
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| 86 | case 'x': |
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| 87 | m |= O_EXCL; |
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| 88 | break; |
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| 89 | default: |
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| 90 | break; |
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| 91 | } |
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| 92 | } |
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| 93 | #if defined (O_TEXT) && !defined (__CYGWIN__) |
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| 94 | if (!(m | O_BINARY)) |
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| 6099 | serge | 95 | m |= O_TEXT; |
| 4349 | Serge | 96 | #endif |
| 97 | *optr = m | o; |
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| 98 | return ret; |
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| 99 | } |