2825f10b7f
Support O_PATH file descriptors when handling fgetxattr and fsetxattr.
This avoids requiring file read access to pull extended attributes.
This is needed to support O_PATH file descriptors when calling
SELinux's fgetfilecon() call. In particular, this allows the querying
and setting of SELinux file context by using something like the following
code:
int dirfd = open("/path/to/dir", O_DIRECTORY);
int fd = openat(dirfd, "file", O_PATH | O_NOFOLLOW);
char *context;
fgetfilecon(fd, &context);
This change was motivated by a comment in
https://android-review.googlesource.com/#/c/152680/1/toys/posix/ls.c
Change-Id: Ic0cdf9f9dd0e35a63b44a4c4a08400020041eddf
27 lines
413 B
ArmAsm
27 lines
413 B
ArmAsm
/* Generated by gensyscalls.py. Do not edit. */
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#include <private/bionic_asm.h>
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ENTRY(___fgetxattr)
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.set push
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.set noreorder
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li v0, __NR_fgetxattr
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syscall
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bnez a3, 1f
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move a0, v0
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j ra
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nop
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1:
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move t0, ra
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bal 2f
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nop
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2:
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.cpsetup ra, t1, 2b
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LA t9,__set_errno_internal
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.cpreturn
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j t9
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move ra, t0
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.set pop
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END(___fgetxattr)
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.hidden ___fgetxattr
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