first pass at implementing *at funcs

Tested basic functionality with coreutils and things seem to work.  At
least gives us a basis to jump from.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>

18 files changed, 370 insertions, 19 deletions

diff --git a/libc/misc/dirent/opendir.c b/libc/misc/dirent/opendir.c
index 50e4082da..fa07d0052 100644
--- a/libc/misc/dirent/opendir.c
+++ b/libc/misc/dirent/opendir.c
@@ -12,14 +12,55 @@
 #include <unistd.h>
 #include <sys/dir.h>
 #include <sys/stat.h>
+#include <dirent.h>
 #include "dirstream.h"
 
-/* libc_hidden_proto(opendir) */
-/* libc_hidden_proto(open) */
-/* libc_hidden_proto(fcntl) */
-/* libc_hidden_proto(close) */
-/* libc_hidden_proto(stat) */
-/* libc_hidden_proto(fstat) */
+static DIR *fd_to_DIR(int fd, __blksize_t size)
+{
+	DIR *ptr;
+
+	ptr = malloc(sizeof(*ptr));
+	if (!ptr)
+		return NULL;
+
+	ptr->dd_fd = fd;
+	ptr->dd_nextloc = ptr->dd_size = ptr->dd_nextoff = 0;
+	ptr->dd_max = size;
+	if (ptr->dd_max < 512)
+		ptr->dd_max = 512;
+
+	ptr->dd_buf = calloc(1, ptr->dd_max);
+	if (!ptr->dd_buf) {
+		free(ptr);
+		return NULL;
+	}
+	__pthread_mutex_init(&ptr->dd_lock, NULL);
+
+	return ptr;
+}
+
+DIR *fdopendir(int fd)
+{
+	int flags;
+	struct stat st;
+
+	if (fstat(fd, &st))
+		return NULL;
+	if (!S_ISDIR(st.st_mode)) {
+		__set_errno(ENOTDIR);
+		return NULL;
+	}
+
+	flags = fcntl(fd, F_GETFL);
+	if (flags == -1)
+		return NULL;
+	if ((flags & O_ACCMODE) == O_WRONLY) {
+		__set_errno(EINVAL);
+		return NULL;
+	}
+
+	return fd_to_DIR(fd, st.st_blksize);
+}
 
 /* opendir just makes an open() call - it return NULL if it fails
  * (open sets errno), otherwise it returns a DIR * pointer.
@@ -61,23 +102,12 @@ close_and_ret:
 		__set_errno(saved_errno);
 		return NULL;
 	}
-	if (!(ptr = malloc(sizeof(*ptr))))
-		goto nomem_close_and_ret;
 
-	ptr->dd_fd = fd;
-	ptr->dd_nextloc = ptr->dd_size = ptr->dd_nextoff = 0;
-	ptr->dd_max = statbuf.st_blksize;
-	if (ptr->dd_max < 512)
-		ptr->dd_max = 512;
-
-	if (!(ptr->dd_buf = calloc(1, ptr->dd_max))) {
-		free(ptr);
-nomem_close_and_ret:
+	ptr = fd_to_DIR(fd, statbuf.st_blksize);
+	if (!ptr) {
 		close(fd);
 		__set_errno(ENOMEM);
-		return NULL;
 	}
-	__pthread_mutex_init(&(ptr->dd_lock), NULL);
 	return ptr;
 }
 libc_hidden_def(opendir)
diff --git a/libc/sysdeps/linux/common/faccessat.c b/libc/sysdeps/linux/common/faccessat.c
new file mode 100644
index 000000000..09ca129a2
--- /dev/null
+++ b/libc/sysdeps/linux/common/faccessat.c
@@ -0,0 +1,16 @@
+/*
+ * faccessat() for uClibc
+ *
+ * Copyright (C) 2009 Analog Devices Inc.
+ *
+ * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
+ */
+
+#include <sys/syscall.h>
+#include <unistd.h>
+
+#ifdef __NR_faccessat
+_syscall4(int, faccessat, int, fd, const char *, file, int, type, int, flag)
+#else
+/* should add emulation with faccess() and /proc/self/fd/ ... */
+#endif
diff --git a/libc/sysdeps/linux/common/fchmodat.c b/libc/sysdeps/linux/common/fchmodat.c
new file mode 100644
index 000000000..7d4dd4e2c
--- /dev/null
+++ b/libc/sysdeps/linux/common/fchmodat.c
@@ -0,0 +1,16 @@
+/*
+ * fchmodat() for uClibc
+ *
+ * Copyright (C) 2009 Analog Devices Inc.
+ *
+ * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
+ */
+
+#include <sys/syscall.h>
+#include <sys/stat.h>
+
+#ifdef __NR_fchmodat
+_syscall4(int, fchmodat, int, fd, const char *, file, mode_t, mode, int, flag)
+#else
+/* should add emulation with fchmod() and /proc/self/fd/ ... */
+#endif
diff --git a/libc/sysdeps/linux/common/fchownat.c b/libc/sysdeps/linux/common/fchownat.c
new file mode 100644
index 000000000..707164d1f
--- /dev/null
+++ b/libc/sysdeps/linux/common/fchownat.c
@@ -0,0 +1,16 @@
+/*
+ * fchownat() for uClibc
+ *
+ * Copyright (C) 2009 Analog Devices Inc.
+ *
+ * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
+ */
+
+#include <sys/syscall.h>
+#include <unistd.h>
+
+#ifdef __NR_fchownat
+_syscall5(int, fchownat, int, fd, const char *, file, uid_t, owner, gid_t, group, int, flag)
+#else
+/* should add emulation with fchown() and /proc/self/fd/ ... */
+#endif
diff --git a/libc/sysdeps/linux/common/fstatat.c b/libc/sysdeps/linux/common/fstatat.c
new file mode 100644
index 000000000..149c1890d
--- /dev/null
+++ b/libc/sysdeps/linux/common/fstatat.c
@@ -0,0 +1,27 @@
+/*
+ * fstatat() for uClibc
+ *
+ * Copyright (C) 2009 Analog Devices Inc.
+ *
+ * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
+ */
+
+#include <sys/syscall.h>
+#include <sys/stat.h>
+#include "xstatconv.h"
+
+#ifdef __NR_fstatat64
+int fstatat(int fd, const char *file, struct stat *buf, int flag)
+{
+	int ret;
+	struct kernel_stat kbuf;
+
+	ret = INLINE_SYSCALL(fstatat64, 4, fd, file, &kbuf, flag);
+	if (ret == 0)
+		__xstat_conv(&kbuf, buf);
+
+	return ret;
+}
+#else
+/* should add emulation with fstat() and /proc/self/fd/ ... */
+#endif
diff --git a/libc/sysdeps/linux/common/fstatat64.c b/libc/sysdeps/linux/common/fstatat64.c
new file mode 100644
index 000000000..5ae1fadba
--- /dev/null
+++ b/libc/sysdeps/linux/common/fstatat64.c
@@ -0,0 +1,31 @@
+/*
+ * fstatat64() for uClibc
+ *
+ * Copyright (C) 2009 Analog Devices Inc.
+ *
+ * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
+ */
+
+#include <sys/syscall.h>
+#include <sys/stat.h>
+#include "xstatconv.h"
+
+#ifdef __UCLIBC_HAS_LFS__
+
+#ifdef __NR_fstatat64
+int fstatat64(int fd, const char *file, struct stat64 *buf, int flag)
+{
+	int ret;
+	struct kernel_stat64 kbuf;
+
+	ret = INLINE_SYSCALL(fstatat64, 4, fd, file, &kbuf, flag);
+	if (ret == 0)
+		__xstat64_conv(&kbuf, buf);
+
+	return ret;
+}
+#else
+/* should add emulation with fstat64() and /proc/self/fd/ ... */
+#endif
+
+#endif
diff --git a/libc/sysdeps/linux/common/futimesat.c b/libc/sysdeps/linux/common/futimesat.c
new file mode 100644
index 000000000..bd73eae7e
--- /dev/null
+++ b/libc/sysdeps/linux/common/futimesat.c
@@ -0,0 +1,16 @@
+/*
+ * futimesat() for uClibc
+ *
+ * Copyright (C) 2009 Analog Devices Inc.
+ *
+ * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
+ */
+
+#include <sys/syscall.h>
+#include <sys/time.h>
+
+#ifdef __NR_futimesat
+_syscall3(int, futimesat, int, fd, const char *, file, const struct timeval *, tvp)
+#else
+/* should add emulation with futimes() and /proc/self/fd/ ... */
+#endif
diff --git a/libc/sysdeps/linux/common/linkat.c b/libc/sysdeps/linux/common/linkat.c
new file mode 100644
index 000000000..9abe9ec71
--- /dev/null
+++ b/libc/sysdeps/linux/common/linkat.c
@@ -0,0 +1,16 @@
+/*
+ * linkat() for uClibc
+ *
+ * Copyright (C) 2009 Analog Devices Inc.
+ *
+ * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
+ */
+
+#include <sys/syscall.h>
+#include <unistd.h>
+
+#ifdef __NR_linkat
+_syscall5(int, linkat, int, fromfd, const char *, from, int, tofd, const char *, to, int, flags)
+#else
+/* should add emulation with link() and /proc/self/fd/ ... */
+#endif
diff --git a/libc/sysdeps/linux/common/mkdirat.c b/libc/sysdeps/linux/common/mkdirat.c
new file mode 100644
index 000000000..4da9468e1
--- /dev/null
+++ b/libc/sysdeps/linux/common/mkdirat.c
@@ -0,0 +1,16 @@
+/*
+ * mkdirat() for uClibc
+ *
+ * Copyright (C) 2009 Analog Devices Inc.
+ *
+ * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
+ */
+
+#include <sys/syscall.h>
+#include <sys/stat.h>
+
+#ifdef __NR_mkdirat
+_syscall3(int, mkdirat, int, fd, const char *, path, mode_t, mode)
+#else
+/* should add emulation with mkdir() and /proc/self/fd/ ... */
+#endif
diff --git a/libc/sysdeps/linux/common/mkfifoat.c b/libc/sysdeps/linux/common/mkfifoat.c
new file mode 100644
index 000000000..e442fe22f
--- /dev/null
+++ b/libc/sysdeps/linux/common/mkfifoat.c
@@ -0,0 +1,19 @@
+/*
+ * mkfifoat() for uClibc
+ *
+ * Copyright (C) 2009 Analog Devices Inc.
+ *
+ * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
+ */
+
+#include <sys/syscall.h>
+#include <sys/stat.h>
+
+#ifdef __NR_mknodat
+int mkfifoat(int fd, const char *path, mode_t mode)
+{
+	return mknodat(fd, path, mode | S_IFIFO, 0);
+}
+#else
+/* should add emulation with mkfifo() and /proc/self/fd/ ... */
+#endif
diff --git a/libc/sysdeps/linux/common/mknodat.c b/libc/sysdeps/linux/common/mknodat.c
new file mode 100644
index 000000000..93b9e6e75
--- /dev/null
+++ b/libc/sysdeps/linux/common/mknodat.c
@@ -0,0 +1,25 @@
+/*
+ * mknodat() for uClibc
+ *
+ * Copyright (C) 2009 Analog Devices Inc.
+ *
+ * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
+ */
+
+#include <sys/syscall.h>
+#include <sys/stat.h>
+
+#ifdef __NR_mknodat
+int mknodat(int fd, const char *path, mode_t mode, dev_t dev)
+{
+	unsigned long long int k_dev;
+
+	/* We must convert the value to dev_t type used by the kernel.  */
+	k_dev = (dev) & ((1ULL << 32) - 1);
+
+	return INLINE_SYSCALL(mknodat, 4, fd, path, mode, (unsigned int)k_dev);
+}
+libc_hidden_def(mknodat)
+#else
+/* should add emulation with mknod() and /proc/self/fd/ ... */
+#endif
diff --git a/libc/sysdeps/linux/common/openat.c b/libc/sysdeps/linux/common/openat.c
new file mode 100644
index 000000000..33bd606a1
--- /dev/null
+++ b/libc/sysdeps/linux/common/openat.c
@@ -0,0 +1,18 @@
+/*
+ * openat() for uClibc
+ *
+ * Copyright (C) 2009 Analog Devices Inc.
+ *
+ * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
+ */
+
+#define openat __xx_openat
+#include <sys/syscall.h>
+#include <fcntl.h>
+#undef openat
+
+#ifdef __NR_openat
+_syscall4(int, openat, int, fd, const char *, file, int, oflag, mode_t, mode)
+#else
+/* should add emulation with open() and /proc/self/fd/ ... */
+#endif
diff --git a/libc/sysdeps/linux/common/openat64.c b/libc/sysdeps/linux/common/openat64.c
new file mode 100644
index 000000000..75711aad6
--- /dev/null
+++ b/libc/sysdeps/linux/common/openat64.c
@@ -0,0 +1,25 @@
+/*
+ * openat() for uClibc
+ *
+ * Copyright (C) 2009 Analog Devices Inc.
+ *
+ * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
+ */
+
+#define openat64 __xx_openat
+#include <sys/syscall.h>
+#include <fcntl.h>
+#undef openat64
+
+#ifdef __UCLIBC_HAS_LFS__
+
+#ifdef __NR_openat
+int openat64(int fd, const char *file, int oflag, mode_t mode)
+{
+	return openat(fd, file, oflag | O_LARGEFILE, mode);
+}
+#else
+/* should add emulation with open() and /proc/self/fd/ ... */
+#endif
+
+#endif
diff --git a/libc/sysdeps/linux/common/readlinkat.c b/libc/sysdeps/linux/common/readlinkat.c
new file mode 100644
index 000000000..d0a98e115
--- /dev/null
+++ b/libc/sysdeps/linux/common/readlinkat.c
@@ -0,0 +1,16 @@
+/*
+ * readlinkat() for uClibc
+ *
+ * Copyright (C) 2009 Analog Devices Inc.
+ *
+ * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
+ */
+
+#include <sys/syscall.h>
+#include <unistd.h>
+
+#ifdef __NR_readlinkat
+_syscall4(ssize_t, readlinkat, int, fd, const char *, path, char *, buf, size_t, len)
+#else
+/* should add emulation with readlink() and /proc/self/fd/ ... */
+#endif
diff --git a/libc/sysdeps/linux/common/renameat.c b/libc/sysdeps/linux/common/renameat.c
new file mode 100644
index 000000000..a898f7b86
--- /dev/null
+++ b/libc/sysdeps/linux/common/renameat.c
@@ -0,0 +1,16 @@
+/*
+ * renameat() for uClibc
+ *
+ * Copyright (C) 2009 Analog Devices Inc.
+ *
+ * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
+ */
+
+#include <sys/syscall.h>
+#include <stdio.h>
+
+#ifdef __NR_renameat
+_syscall4(int, renameat, int, oldfd, const char *, old, int, newfd, const char *, new)
+#else
+/* should add emulation with rename() and /proc/self/fd/ ... */
+#endif
diff --git a/libc/sysdeps/linux/common/symlinkat.c b/libc/sysdeps/linux/common/symlinkat.c
new file mode 100644
index 000000000..6381b3319
--- /dev/null
+++ b/libc/sysdeps/linux/common/symlinkat.c
@@ -0,0 +1,16 @@
+/*
+ * symlinkat() for uClibc
+ *
+ * Copyright (C) 2009 Analog Devices Inc.
+ *
+ * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
+ */
+
+#include <sys/syscall.h>
+#include <unistd.h>
+
+#ifdef __NR_symlinkat
+_syscall3(int, symlinkat, const char *, from, int, tofd, const char *, to)
+#else
+/* should add emulation with symlink() and /proc/self/fd/ ... */
+#endif
diff --git a/libc/sysdeps/linux/common/unlinkat.c b/libc/sysdeps/linux/common/unlinkat.c
new file mode 100644
index 000000000..0eaf2b670
--- /dev/null
+++ b/libc/sysdeps/linux/common/unlinkat.c
@@ -0,0 +1,16 @@
+/*
+ * unlinkat() for uClibc
+ *
+ * Copyright (C) 2009 Analog Devices Inc.
+ *
+ * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
+ */
+
+#include <sys/syscall.h>
+#include <unistd.h>
+
+#ifdef __NR_unlinkat
+_syscall3(int, unlinkat, int, fd, const char *, file, int, flag)
+#else
+/* should add emulation with unlink() and /proc/self/fd/ ... */
+#endif
diff --git a/libc/sysdeps/linux/common/utimensat.c b/libc/sysdeps/linux/common/utimensat.c
new file mode 100644
index 000000000..3c5af8586
--- /dev/null
+++ b/libc/sysdeps/linux/common/utimensat.c
@@ -0,0 +1,16 @@
+/*
+ * utimensat() for uClibc
+ *
+ * Copyright (C) 2009 Analog Devices Inc.
+ *
+ * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
+ */
+
+#include <sys/syscall.h>
+#include <sys/stat.h>
+
+#ifdef __NR_utimensat
+_syscall4(int, utimensat, int, fd, const char *, path, const struct timespec *, times, int, flags)
+#else
+/* should add emulation with utimens() and /proc/self/fd/ ... */
+#endif