1*c9945492SAndroid Build Coastguard Worker #include <unistd.h>
2*c9945492SAndroid Build Coastguard Worker #include <fcntl.h>
3*c9945492SAndroid Build Coastguard Worker #include "syscall.h"
4*c9945492SAndroid Build Coastguard Worker
readlink(const char * restrict path,char * restrict buf,size_t bufsize)5*c9945492SAndroid Build Coastguard Worker ssize_t readlink(const char *restrict path, char *restrict buf, size_t bufsize)
6*c9945492SAndroid Build Coastguard Worker {
7*c9945492SAndroid Build Coastguard Worker char dummy[1];
8*c9945492SAndroid Build Coastguard Worker if (!bufsize) {
9*c9945492SAndroid Build Coastguard Worker buf = dummy;
10*c9945492SAndroid Build Coastguard Worker bufsize = 1;
11*c9945492SAndroid Build Coastguard Worker }
12*c9945492SAndroid Build Coastguard Worker #ifdef SYS_readlink
13*c9945492SAndroid Build Coastguard Worker int r = __syscall(SYS_readlink, path, buf, bufsize);
14*c9945492SAndroid Build Coastguard Worker #else
15*c9945492SAndroid Build Coastguard Worker int r = __syscall(SYS_readlinkat, AT_FDCWD, path, buf, bufsize);
16*c9945492SAndroid Build Coastguard Worker #endif
17*c9945492SAndroid Build Coastguard Worker if (buf == dummy && r > 0) r = 0;
18*c9945492SAndroid Build Coastguard Worker return __syscall_ret(r);
19*c9945492SAndroid Build Coastguard Worker }
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