add mk*temp functions from musl

bootfs.manifest

@@ -16,3 +16,4 @@
 /tests/tst-pthread.so: ./tests/tst-pthread.so
 /tests/tst-malloc.so: ../../external/glibc-testsuite/build/debug/malloc/tst-malloc.so
 /tests/tst-getcwd.so: ../../external/glibc-testsuite/build/debug/io/tst-getcwd.so
+/tests/read01.so: ../../external/ltp/build/debug/syscalls/read/read01.so

libc/build.mak

@@ -190,6 +190,10 @@ libc += string/wmemcpy.o
 libc += string/wmemmove.o
 libc += string/wmemset.o
 
+libc += temp/mkdtemp.o
+libc += temp/mkstemp.o
+libc += temp/mktemp.o
+
 libc += time/__asctime.o
 libc += time/__time_to_tm.o
 libc += time/__tm_to_time.o

libc/internal/libc.h

@@ -8,3 +8,9 @@
 /* TODO: add real locking */
 #define LOCK(x) ((void)(x))
 #define UNLOCK(x) ((void)(x))
+
+#undef LFS64_2
+#define LFS64_2(x, y) weak_alias(x, y)
+
+#undef LFS64
+#define LFS64(x) LFS64_2(x, x##64)

libc/temp/mkdtemp.c

+#include <string.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <limits.h>
+#include <errno.h>
+#include <sys/stat.h>
+#include "libc.h"
+
+char *__mktemp(char *);
+
+char *mkdtemp(char *template)
+{
+	int retries = 100, t0 = *template;
+	while (retries--) {
+		if (!*__mktemp(template)) return 0;
+		if (!mkdir(template, 0700)) return template;
+		if (errno != EEXIST) return 0;
+		/* this is safe because mktemp verified
+		 * that we have a valid template string */
+		template[0] = t0;
+		strcpy(template+strlen(template)-6, "XXXXXX");
+	}
+	return 0;
+}

libc/temp/mkstemp.c

+#include <string.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <limits.h>
+#include <errno.h>
+#include "libc.h"
+
+char *__mktemp(char *);
+
+int mkstemp(char *template)
+{
+	int fd, retries = 100, t0 = *template;
+	while (retries--) {
+		if (!*__mktemp(template)) return -1;
+		if ((fd = open(template, O_RDWR | O_CREAT | O_EXCL, 0600))>=0)
+			return fd;
+		if (errno != EEXIST) return -1;
+		/* this is safe because mktemp verified
+		 * that we have a valid template string */
+		template[0] = t0;
+		strcpy(template+strlen(template)-6, "XXXXXX");
+	}
+	return -1;
+}
+
+LFS64(mkstemp);

libc/temp/mktemp.c

+#include <string.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <errno.h>
+#include <time.h>
+#include <stdint.h>
+#include <sys/time.h>
+#include "libc.h"
+
+char *__mktemp(char *template)
+{
+	struct timeval tv;
+	size_t i, l = strlen(template);
+	int retries = 10000;
+	unsigned long r;
+
+	if (l < 6 || strcmp(template+l-6, "XXXXXX")) {
+		errno = EINVAL;
+		*template = 0;
+		return template;
+	}
+	while (retries--) {
+		gettimeofday(&tv, NULL);
+		r = tv.tv_usec + (uintptr_t)&tv / 16 + (uintptr_t)template;
+		for (i=1; i<=6; i++, r>>=4)
+			template[l-i] = 'A'+(r&15);
+		if (access(template, F_OK) < 0) return template;
+	}
+	*template = 0;
+	errno = EEXIST;
+	return template;
+}
+
+weak_alias(__mktemp, mktemp);

loader.cc

@@ -289,8 +289,8 @@ void main_thread(elf::program& prog)
     debug(fmt("clock@t1 %1%") % t1);
     debug(fmt("clock@t2 %1%") % t2);
 
-//    load_tests(prog);
-    start_jvm(prog);
+    load_tests(prog);
+//    start_jvm(prog);
 
     while (true)
 	;