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| author | Denys Vlasenko <dvlasenk@redhat.com> | 2019-06-21 12:09:36 +0200 |
|---|---|---|
| committer | Waldemar Brodkorb <wbx@openadk.org> | 2019-06-21 12:09:36 +0200 |
| commit | 4f506bb95ad4bc55e6174cef98803802a35b050e (patch) | |
| tree | b6e7adaf2b8c6b2d7cdb3dba03d87062e7e39e27 /libc/unistd/fpathconf.c | |
| parent | f93b43e4d1a02b72e8e7659f6be4cc28a0c6e194 (diff) | |
fix opendir, fpathconf and ttyname_r to use fstat64(), not fstat()
There is no opendir64(), thus even programs built for 64-bit off_t
use opendir(). Before this change, internally opendir() uses fstat(),
with the following breakage if some of struct stat fields are too narrow:
$ strace ls -l
execve("/busybox/ls", ["ls", "-l"], 0x7ffcdc43ede8 /* 16 vars */) = 0
ioctl(0, TCGETS, {B38400 opost isig icanon echo ...}) = 0
ioctl(1, TCGETS, {B38400 opost isig icanon echo ...}) = 0
getuid32() = 0
time([1551486393 /* 2019-03-02T00:26:33+0000 */]) = 1551486393 (2019-03-02T00:26:33+0000)
ioctl(0, TIOCGWINSZ, {ws_row=38, ws_col=120, ws_xpixel=0, ws_ypixel=0}) = 0
ioctl(1, TCGETS, {B38400 opost isig icanon echo ...}) = 0
brk(NULL) = 0x9768000
brk(0x9769000) = 0x9769000
lstat64(".", 0xffa6e374) = 0
open(".", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
fstat(3, 0xffa6e378) = -1 EOVERFLOW (Value too large for defined data type)
See https://bugs.busybox.net/show_bug.cgi?id=11651
Signed-off-by: Denys Vlasenko <dvlasenk@redhat.com>
Diffstat (limited to 'libc/unistd/fpathconf.c')
| -rw-r--r-- | libc/unistd/fpathconf.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/libc/unistd/fpathconf.c b/libc/unistd/fpathconf.c index 556343be2..82c34c4da 100644 --- a/libc/unistd/fpathconf.c +++ b/libc/unistd/fpathconf.c @@ -24,6 +24,8 @@ #include <sys/stat.h> #include <sys/statfs.h> +#define STAT stat64 +#define FSTAT fstat64 #ifndef __USE_FILE_OFFSET64 extern int fstatfs (int __fildes, struct statfs *__buf) @@ -205,9 +207,9 @@ long int fpathconf(int fd, int name) #if defined _POSIX_ASYNC_IO { /* AIO is only allowed on regular files and block devices. */ - struct stat st; + struct STAT st; - if (fstat (fd, &st) < 0 || (! S_ISREG (st.st_mode) && ! S_ISBLK (st.st_mode))) + if (FSTAT (fd, &st) < 0 || (! S_ISREG (st.st_mode) && ! S_ISBLK (st.st_mode))) return -1; else return 1; |