Fix C headers for all platforms.

See docs/CHANGES.TXT for a detailed list of changes. These are mainly cosmetic
and to reflect new declarations for android-8.

Change-Id: I152dcee6ae6b1fd9368fe5d468443dd9fee459db

2 files changed, 211 insertions, 0 deletions

diff --git a/docs/CHANGES.TXT b/docs/CHANGES.TXT
index 84e1d3473..dc46b6ca0 100644
--- a/docs/CHANGES.TXT
+++ b/docs/CHANGES.TXT
@@ -119,6 +119,43 @@ OTHER FIXES & CHANGES:
 - removed the annoying 'the mangling of 'va_list' has changed in GCC 4.4'
   warning when building with GCC 4.4.0 for ARM.
 
+- C Library header fixes:
+
+    For all platforms:
+
+        - <arpa/inet.h>: no longer includes <netinet/in6.h>.
+        - <ctype.h>: better inlining with -ansi option.
+        - <mntent.h>: add missing include for <stdio.h>.
+        - <netinet/in.h>: include <netinet/in6.h> and define in6addr_any +
+          in6addr_loopback.
+        - <netinet/in6.h>: add IPV6_JOIN_GROUP, IPV6_LEAVE_GROUP,
+          IN6ADDR_ANY_INIT, ipv6mr_interface.
+        - <sys/epoll.h>: add missing C++ inclusion guards.
+        - <sys/resource.h>: add missing rlim_t declaration.
+        - <sys/system_properties.h>: add missing C++ inclusion guards.
+        - <time64.h>: add missing C++ inclusion guards.
+        - <netdb.h>: move h_errno declaration inside C++ inclusion guards.
+
+- C Library changes:
+
+    For android-8 (a.k.a. Android 2.2):
+
+        - <dlfcn.h>: add DL_info and dladdr().
+        - <err.h>: add err(), warn() and other variants.
+        - <regex.h>, <fts.h>, <sys/queue.h>: added
+        - <pthread.h>: add pthread_condattr_t
+        - <sched.h>: added proper clone() declaration (and implementation).
+        - <signal.h>: added killpg().
+        - <stdio.h>: add fdprintf() and vfdprintf().
+        - <stdlib.h>: fix ptsname_r() signature in declaration. previous
+          implementation was broken anyway.
+        - <unistd.h>: add getusershell(), setusershell(), endusershell(),
+          ttyname(), ttyname_r(), TEMP_FAILURE_RETRY. Fix usleep() signature
+          (now returns int).
+        - <wchar.h>: add fake mbstowcs() and wcstombs().
+
+  More details available under docs/system/libc/CHANGES.TXT
+
 -------------------------------------------------------------------------------
 android-ndk-r3
 
diff --git a/docs/system/libc/CHANGES.TXT b/docs/system/libc/CHANGES.TXT
new file mode 100644
index 000000000..90806851a
--- /dev/null
+++ b/docs/system/libc/CHANGES.TXT
@@ -0,0 +1,174 @@
+Bionic ChangeLog:
+-----------------
+
+Differences between current and Android 2.1:
+
+- Add support for SH-4 CPU architecture !
+
+- __atomic_swap(): use LDREX/STREX CPU instructions on ARMv6 and higher.
+
+- <arpa/telnet.h>: New header (declarations only, no implementation).
+
+- <err.h>: New header + implementation. GLibc compatibility.
+
+- <warn.h>: New header + implementation. GLibc compatibility.
+
+- <fts.h>: New header + implementation.
+
+- <mntent.h>: Add missing <stdio.h> include.
+
+- <regex.h>: New header + implementation.
+
+- <signal.h>: Added killpg()
+
+- <stdint.h>: Allow 64-bit type declarations on C99 builds.
+
+- <stdio.h>: Add fdprintf() and vfdprintf(). Note that GLibc provides
+  the confusing 'dprintf' and 'vdprintf()' functions instead.
+
+- <stdlib.h>: Fix ptsname_r(): the return type is int instead of char*.
+  The mistake comes from a GLibc man page bug (the man page listed a return
+  type of char*, while the implementation used int. Fixed in late 2009 only).
+  The Bionic implementation was incorrect. Technically, this is an ABI
+  breakage, but code that used this function probably never worked or
+  compiled properly anyway.
+
+- <strings.h>: Add missing <sys/types.h> include.
+
+- <sys/queue.h>: Added new header (no implementation - macro templates).
+
+- <sys/resource.h>: Add rlim_t proper definition.
+
+- <time64.h>: Add missing C++ header inclusion guards.
+
+- <unistd.h>: Add getusershell(), setusershell() and endusershell(), though
+  implementation are bogus. GLibc compatibility.
+
+- <wchar.h>: Add mbstowcs() and wcstombs()
+
+- add clone() implementation for ARM (x86 and SH-4 not working yet).
+
+- <sys/epoll.h>: <sys/system_properties.h>: Add missing C++ inclusion guards
+
+- fix getpwnam() and getpwgrp() to accept "app_0" as a valid user name.
+
+- fix sem_trywait() to return -1 and set errno to EAGAIN, instead of
+  returning EAGAIN directly.
+
+- fix sem_post() to wake up multiple threads when called rapidly in
+  succession.
+
+- DNS: partial implementation of RFC3484 (rule 1, 2, 5, 6, 8, 10 and
+  modified rule 9), for better address selection/sorting.
+  In the process, removed code that was previously used for "sortlist"
+  in /etc/resolv.conf. (resolv.conf is already ignored, so the latter
+  is a no-op for actual functionality.)
+
+- fix pthread_sigmask() to properly return an error code without touching
+  errno. Previous implementation returned -1 on error, setting errno, which
+  is not Posix compliant.
+
+- add sigaltstack() implementation for ARM.
+
+- <time.h>: Properly implement the 'timezone' and 'daylight' global variables
+  (they were not defined previously, though declared in the header).
+
+- <time.h>: Fix timezone management implementation to properly update
+  'tm_gmtoff' field in 'struct tm' structure.
+
+- DNS: get rid of spurious random DNS queries when trying to resolve
+  an unknown domain name. Due to an initialization bug, a random DNS search
+  list was generated for each thread if net.dns.search is not defined.
+
+- <pthread.h>: Add pthread_condattr_init/destroy/setpshared/getpshared functions
+  to enable proper shared conditional variable initialization.
+
+  Modify the pthread_mutex_t and pthread_cond_t implementation to use private
+  futexes for performance reasons. Mutexes and Condvars are no longer shareable
+  between processes by default anymore, unless you use PTHREAD_PROCESS_SHARED
+  with pthread_mutexattr_setpshared() and/or pthread_condattr_setpshared().
+
+-------------------------------------------------------------------------------
+Differences between Android 2.1 and 2.0.1:
+
+- zoneinfo: updated data tables to version 2009s
+
+
+-------------------------------------------------------------------------------
+Differences between Android 2.0.1 and 2.0:
+
+- abort(): ARM-specific hack to preserve the 'lr' register when abort()
+  is called (GCC does not preserve it by default since it thinks that
+  abort() never returns). This improves stack traces considerably.
+
+
+-------------------------------------------------------------------------------
+Differences between Android 2.0 and 1.6:
+
+- memcmp(), memcpy(): ARMv7 optimized versions.
+
+- pthread_mutexattr_setpshared(): implementation will not return ENOTSUP
+  if PTHREAD_PROCESS_SHARED is used, because our Mutex implementation can
+  work across multiple processes.
+
+  *HOWEVER* it does not use "robust futexes" which means that held mutexes
+  *are not* automatically released by the kernel when the owner process
+  crashes or exits. This is only done to simplify communication between
+  two always-live system processes, DO NOT USE THIS IN APPLICATIONS !
+
+- pthread_mutex_lock_timeout_np(): New Android-specific function to
+  perform a timed lock (). In case of timeout, it returns EBUSY.
+
+- pthread_cond_timedwait_monotonic_np(): Same as pthread_cond_timedwait()
+  but uses the monotonic clock(). Android-specific.
+
+- pthread_cond_timedwait_relative_np(): Same as pthread_cond_timedwait()
+  but uses a relative timeout instead. Android-specific.
+
+- <netinet/in.h>: Now includes <netinet/in6.h>.
+
+- <netinet/in6.h>: Added IPV6_JOIN_GROUP, IPV6_LEAVE_GROUP, IN6ADDR_ANY_INIT
+  and ipv6mr_interface definitions.
+
+- <time.h>:
+    * Add missing tzset() declaration.
+    * Add Android-specific strftime_tz().
+
+- getaddrinfo():
+    Only perform IPv6 lookup for AF_UNSPEC if we have IPv6 connectivity.
+    This saves one DNS query per lookup on non-IPv6 systems.
+
+- mktime(): Fix an infinite loop problen that appeared when switching to
+  GCC 4.4.0.
+
+- strftime(): fix incorrect handling of dates > 2038 due to 64-bit issue
+  in original code.
+
+-------------------------------------------------------------------------------
+Differences between Android 1.6 and 1.5:
+
+- C runtime: Fix runtime initialization to be called before any static C++
+  constructors. This allows these to use pthread functions properly.
+
+- __aeabi_atexit(): Fix implementation to properly call C++ static destructors
+  when the program exits (or when a shared library is unloaded).
+
+- <sys/stat.h>: added GLibc compatibility macros definitions:
+
+        #define  st_atimensec  st_atime_nsec
+        #define  st_mtimensec  st_mtime_nsec
+        #define  st_ctimensec  st_ctime_nsec
+
+- getaddrinfo(): implementation will now allow numeric ports if ai_socktype is
+  set to ANY. This is to match the GLibc behaviour.
+
+- getservent(): and getservent_r() incorrectly returned the port in host-endian
+  order in the s_port field. It now returns it in big-endian order.
+
+- DNS: Allow underscore in the middle of DNS labels. While not really
+  standard, this extension is needed for some VPN configurations and is
+  supported by other operating systems.
+
+- DNS: Support for DNS domain search lists through the new net.dns.search
+  system property. The corresponding value must be a space-separated list of
+  domain suffixes.