[klibc] [PATCH v2 2/4] klibc: Add alphasort() support.

[Mike Waychison]

Add support for alphasort() as defined in POSIX.1-2008.

Signed-off-by: Mike Waychison <mikew at google.com>
---
 usr/include/dirent.h  |    2 ++
 usr/klibc/Kbuild      |    2 +-
 usr/klibc/alphasort.c |   12 ++++++++++++
 3 files changed, 15 insertions(+), 1 deletions(-)
 create mode 100644 usr/klibc/alphasort.c

diff --git a/usr/include/dirent.h b/usr/include/dirent.h
index 0bcf40b..725452e 100644
--- a/usr/include/dirent.h
+++ b/usr/include/dirent.h
@@ -35,4 +35,6 @@ __extern int scandir(const char *, struct dirent ***,
 		     int (*)(const struct dirent **,
 			     const struct dirent **));
 
+__extern int alphasort(const struct dirent **, const struct dirent **);
+
 #endif				/* _DIRENT_H */
diff --git a/usr/klibc/Kbuild b/usr/klibc/Kbuild
index 40e61da..c4f9ae2 100644
--- a/usr/klibc/Kbuild
+++ b/usr/klibc/Kbuild
@@ -42,7 +42,7 @@ klib-y := vsnprintf.o snprintf.o vsprintf.o sprintf.o \
 	  seteuid.o setegid.o \
 	  getenv.o setenv.o putenv.o __put_env.o unsetenv.o \
 	  clearenv.o nullenv.o \
-	  getopt.o getopt_long.o readdir.o scandir.o remove.o \
+	  getopt.o getopt_long.o readdir.o scandir.o alphasort.o remove.o \
 	  syslog.o closelog.o pty.o getpt.o posix_openpt.o isatty.o reboot.o \
 	  time.o utime.o llseek.o nice.o getpriority.o \
 	  qsort.o bsearch.o \
diff --git a/usr/klibc/alphasort.c b/usr/klibc/alphasort.c
new file mode 100644
index 0000000..d420495
--- /dev/null
+++ b/usr/klibc/alphasort.c
@@ -0,0 +1,12 @@
+/*
+ * alphasort.c: alphasort
+ */
+
+#include <string.h>
+
+#include <dirent.h>
+
+int alphasort(const struct dirent **a, const struct dirent **b)
+{
+	return strcmp((*a)->d_name, (*b)->d_name);
+}