diff options
| author | Markos Chandras <markos.chandras@imgtec.com> | 2012-10-10 15:50:28 +0100 |
|---|---|---|
| committer | Bernhard Reutner-Fischer <rep.dot.nop@gmail.com> | 2013-02-20 13:45:11 +0100 |
| commit | e07db64b78c3905baf3aaeb582899f78ab306781 (patch) | |
| tree | d423ebcc160ca702aa83feeeacdf5cee556a7502 | |
| parent | 3a5be53a84ac68255fbcecb73b8fe58a35550c26 (diff) | |
readlink: Use readlinkat if arch does not have the readlink syscall
Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>
| -rw-r--r-- | include/unistd.h | 1 | ||||
| -rw-r--r-- | libc/sysdeps/linux/common/readlink.c | 8 | ||||
| -rw-r--r-- | libc/sysdeps/linux/common/readlinkat.c | 1 |
3 files changed, 10 insertions, 0 deletions
diff --git a/include/unistd.h b/include/unistd.h index dbf1a9bd7..175a5826e 100644 --- a/include/unistd.h +++ b/include/unistd.h @@ -914,6 +914,7 @@ extern int symlinkat (const char *__from, int __tofd, extern ssize_t readlinkat (int __fd, const char *__restrict __path, char *__restrict __buf, size_t __len) __THROW __nonnull ((2, 3)) __wur; +libc_hidden_proto(readlinkat) #endif /* Remove the link NAME. */ diff --git a/libc/sysdeps/linux/common/readlink.c b/libc/sysdeps/linux/common/readlink.c index ef9e83539..f64aeb947 100644 --- a/libc/sysdeps/linux/common/readlink.c +++ b/libc/sysdeps/linux/common/readlink.c @@ -10,5 +10,13 @@ #include <sys/syscall.h> #include <unistd.h> +#if defined(__NR_readlinkat) && !defined(__NR_readlink) +# include <fcntl.h> +ssize_t readlink (const char *path, char *buf, size_t len) +{ + return readlinkat(AT_FDCWD, path, buf, len); +} +#else _syscall3(ssize_t, readlink, const char *, path, char *, buf, size_t, bufsiz) +#endif libc_hidden_def(readlink) diff --git a/libc/sysdeps/linux/common/readlinkat.c b/libc/sysdeps/linux/common/readlinkat.c index d0a98e115..995b9e2c1 100644 --- a/libc/sysdeps/linux/common/readlinkat.c +++ b/libc/sysdeps/linux/common/readlinkat.c @@ -11,6 +11,7 @@ #ifdef __NR_readlinkat _syscall4(ssize_t, readlinkat, int, fd, const char *, path, char *, buf, size_t, len) +libc_hidden_def(readlinkat) #else /* should add emulation with readlink() and /proc/self/fd/ ... */ #endif |