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1dfa028808
O_DIRECTORY, O_NOFOLLOW, O_NOATIME, O_CLOEXEC, __O_SYNC, O_PATH and __O_TMPFILE are defined as shifts by 16 to 22 bits. Where int is 16 bits (AVR, for example), these shifts exceed the width of the type: GCC evaluates them to 0, and the -Wshift-count-overflow warning is not shown because include/ is a system include directory. The oflags argument of open() is an int, so it could not carry those bits anyway. As a result, on arch with int equal 16-bit opendir() opens directories without O_DIRECTORY, so opening a mount point such as /proc fails with ENOENT, and O_CLOEXEC and O_NOFOLLOW have no effect. When UINT_MAX is 0xffff, use the unused bits 2 to 4 for O_DIRECTORY, O_CLOEXEC and O_NOFOLLOW, define O_NOATIME and __O_SYNC as 0 (O_SYNC falls back to O_DSYNC), and leave O_PATH and O_TMPFILE undefined, so that code which needs them fails to build instead of silently opening with the wrong flags; nothing in the tree uses them. _O_MAXBIT becomes 15. On bigger systems (32-bit, 64-bit) keep the original bit shift. Signed-off-by: Alan Carvalho de Assis <acassis@gmail.com> Assisted-by: Claude Opus 5.5 (claude-opus-5-5) |
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| android | ||
| arpa | ||
| crypto | ||
| cxx | ||
| net | ||
| netinet | ||
| netpacket | ||
| nuttx | ||
| ssp | ||
| sys | ||
| .gitignore | ||
| aio.h | ||
| alloca.h | ||
| assert.h | ||
| byteswap.h | ||
| ctype.h | ||
| debug.h | ||
| dirent.h | ||
| dlfcn.h | ||
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| elf.h | ||
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| err.h | ||
| errno.h | ||
| execinfo.h | ||
| fcntl.h | ||
| fixedmath.h | ||
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| hex2bin.h | ||
| iconv.h | ||
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| imx_container.h | ||
| inttypes.h | ||
| iso646.h | ||
| langinfo.h | ||
| libgen.h | ||
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| limits.h | ||
| locale.h | ||
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| malloc.h | ||
| mqueue.h | ||
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| nl_types.h | ||
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| obstack.h | ||
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| poll.h | ||
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| shadow.h | ||
| signal.h | ||
| spawn.h | ||
| stdbool.h | ||
| stddef.h | ||
| stdint.h | ||
| stdio.h | ||
| stdlib.h | ||
| stdnoreturn.h | ||
| string.h | ||
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| syscall.h | ||
| syslog.h | ||
| termios.h | ||
| threads.h | ||
| time.h | ||
| ulimit.h | ||
| unistd.h | ||
| utime.h | ||
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