X-Git-Url: http://nsz.repo.hu/git/?a=blobdiff_plain;f=src%2Fenv%2F__libc_start_main.c;h=10e559096a703202070da2eb95157487f588b937;hb=546f6b322bcafa2452925c19f9607d9689c75f95;hp=539f72e55c2ba52357cf167687b820088978cfdb;hpb=9b52ab1c9a44b62236089ab0272801d049bc5b1e;p=musl

diff --git a/src/env/__libc_start_main.c b/src/env/__libc_start_main.c
index 539f72e5..10e55909 100644
--- a/src/env/__libc_start_main.c
+++ b/src/env/__libc_start_main.c
@@ -1,8 +1,12 @@
 #include <elf.h>
+#include <poll.h>
+#include <fcntl.h>
+#include <signal.h>
+#include "syscall.h"
+#include "atomic.h"
 #include "libc.h"
 
 void __init_tls(size_t *);
-void __init_security(size_t *);
 
 #ifndef SHARED
 static void dummy() {}
@@ -19,6 +23,9 @@ weak_alias(dummy1, __init_ssp);
 extern size_t __hwcap, __sysinfo;
 extern char *__progname, *__progname_full;
 
+#ifndef SHARED
+static
+#endif
 void __init_libc(char **envp, char *pn)
 {
 	size_t i, *auxv, aux[AUX_CNT] = { 0 };
@@ -37,7 +44,20 @@ void __init_libc(char **envp, char *pn)
 
 	__init_tls(aux);
 	__init_ssp((void *)aux[AT_RANDOM]);
-	__init_security(aux);
+
+	if (aux[AT_UID]==aux[AT_EUID] && aux[AT_GID]==aux[AT_EGID]
+		&& !aux[AT_SECURE]) return;
+
+	struct pollfd pfd[3] = { {.fd=0}, {.fd=1}, {.fd=2} };
+#ifdef SYS_poll
+	__syscall(SYS_poll, pfd, 3, 0);
+#else
+	__syscall(SYS_ppoll, pfd, 3, &(struct timespec){0}, 0, _NSIG/8);
+#endif
+	for (i=0; i<3; i++) if (pfd[i].revents&POLLNVAL)
+		if (__sys_open("/dev/null", O_RDWR)<0)
+			a_crash();
+	libc.secure = 1;
 }
 
 int __libc_start_main(int (*main)(int,char **,char **), int argc, char **argv)
@@ -52,7 +72,7 @@ int __libc_start_main(int (*main)(int,char **,char **), int argc, char **argv)
 		(*(void (**)())a)();
 #endif
 
-	/* Pass control to to application */
+	/* Pass control to the application */
 	exit(main(argc, argv, envp));
 	return 0;
 }