Brent Cook ddddec106f add issetugid function to check for elevated privilege ... this function provides a way for third-party library code to use the same logic that's used internally in libc for suppressing untrusted input/state (e.g. the environment) when the application is running with privleges elevated by the setuid or setgid bit or some other mechanism. its semantics are intended to match the openbsd function by the same name. there was some question as to whether this function is necessary: getauxval(AT_SECURE) was proposed as an alternative. however, this has several drawbacks. the most obvious is that it asks programmers to be aware of an implementation detail of ELF-based systems (the aux vector) rather than simply the semantic predicate to be checked. and trying to write a safe, reliable version of issetugid in terms of getauxval is difficult. for example, early versions of the glibc getauxval did not report ENOENT, which could lead to false negatives if AT_SECURE was not present in the aux vector (this could probably only happen when running on non-linux kernels under linux emulation, since glibc does not support linux versions old enough to lack AT_SECURE). as for musl, getauxval has always properly reported errors, but prior to commit 7bece9c209, the musl implementation did not emulate AT_SECURE if missing, which would result in a false positive. since musl actually does partially support kernels that lack AT_SECURE, this was problematic. the intent is that library authors will use issetugid if its availability is detected at build time, and only fall back to the unreliable alternatives on systems that lack it. patch by Brent Cook. commit message/rationale by Rich Felker.		2014-07-19 21:39:18 -04:00
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arpa	fix argument types for legacy function inet_makeaddr	2014-01-06 22:17:24 -05:00
net	net/if_arp.h: add missing ARP hardware identifiers from linux uapi headers	2013-09-15 02:42:29 +00:00
netinet	update netinet/in.h to match the current kernel uapi	2014-05-30 13:06:51 -04:00
netpacket
scsi	add legacy scsi/scsi_ioctl.h header	2013-07-03 18:07:50 +02:00
sys	implement sendmmsg and recvmmsg	2014-06-19 23:01:15 -04:00
aio.h
alloca.h
alltypes.h.in	undefine internal-use type macros at the end of alltypes.h	2013-07-22 20:58:04 -04:00
ar.h
assert.h
byteswap.h
complex.h
cpio.h
crypt.h
ctype.h
dirent.h	refactor headers, especially alltypes.h, and improve C++ ABI compat	2013-07-22 11:22:36 -04:00
dlfcn.h	const-qualify the address argument to dladdr	2014-01-06 22:03:38 -05:00
elf.h	add or1k (OpenRISC 1000) architecture port	2014-07-18 14:10:23 -04:00
endian.h
err.h
errno.h
fcntl.h	add flock64 alias for (struct) flock in fcntl.h	2014-02-18 11:04:15 -05:00
features.h
fenv.h
float.h	write floating point limit constants to 21 significant decimal places	2013-11-20 17:40:33 -05:00
fmtmsg.h	implement fmtmsg function	2014-06-21 19:24:15 -04:00
fnmatch.h	remove now-unnecessary features.h inclusion from fnmatch.h	2013-12-02 02:06:52 -05:00
ftw.h
getopt.h
glob.h
grp.h
iconv.h
ifaddrs.h	make ifaddrs.h expose sys/socket.h	2013-04-10 22:38:46 -04:00
inttypes.h	fix inttypes.h PRI and SCN macros for [u]intptr_t types	2013-10-30 14:52:55 -04:00
iso646.h
langinfo.h	fix multiple minor namespace issues in headers	2013-10-20 22:01:51 -04:00
lastlog.h
libgen.h
libintl.h
limits.h	increase TTY_NAME_MAX limit to 32	2013-11-29 12:45:09 -05:00
link.h	add missing c++ extern "C" wrapping to link.h	2013-08-02 16:52:17 -04:00
locale.h	restore type of NULL to void * except when used in C++ programs	2013-11-24 21:42:55 -05:00
malloc.h
math.h	math.h: make __FLOAT_BITS and __DOUBLE_BITS C89	2014-03-09 19:29:41 +01:00
memory.h
mntent.h
monetary.h
mqueue.h
netdb.h	add support for ipv6 scope_id to getaddrinfo and getnameinfo	2014-06-04 02:24:38 -04:00
nl_types.h	refactor headers, especially alltypes.h, and improve C++ ABI compat	2013-07-22 11:22:36 -04:00
paths.h	remove duplicate definition of _PATH_LASTLOG in paths.h	2013-12-03 20:34:36 -05:00
poll.h
pthread.h	add pthread_setaffinity_np and pthread_getaffinity_np functions	2013-08-10 21:41:05 -04:00
pty.h
pwd.h
regex.h	make regoff_t and regex_t match C++ ABI	2013-07-22 14:39:59 -04:00
resolv.h	fix res_mkquery and res_send prototypes in resolv.h	2013-12-04 21:31:39 +00:00
sched.h	add sched_{get,set}attr syscall numbers and SCHED_DEADLINE macro	2014-05-30 13:06:51 -04:00
search.h	implement hcreate_r, hdestroy_r and hsearch_r	2014-04-02 18:37:45 -04:00
semaphore.h
setjmp.h	change jmp_buf to share an underlying type and struct tag with sigjmp_buf	2013-07-24 02:17:02 -04:00
shadow.h
signal.h	overhaul siginfo_t definition in signal.h	2014-05-24 20:39:46 -04:00
spawn.h
stdalign.h
stdarg.h
stdbool.h	stdbool.h should define __bool_true_false_are_defined even for C++	2013-08-28 00:41:00 -04:00
stddef.h	restore type of NULL to void * except when used in C++ programs	2013-11-24 21:42:55 -05:00
stdint.h	change wint_t to unsigned	2013-07-22 13:05:41 -04:00
stdio_ext.h
stdio.h	restore type of NULL to void * except when used in C++ programs	2013-11-24 21:42:55 -05:00
stdlib.h	fix signed and unsigned comparision in macros in public headers	2014-02-11 10:51:16 +01:00
stdnoreturn.h
string.h	restore type of NULL to void * except when used in C++ programs	2013-11-24 21:42:55 -05:00
strings.h
stropts.h
syscall.h
sysexits.h
syslog.h	remove hack in syslog.h that resulted in aliasing violations	2014-06-21 07:44:46 -04:00
tar.h
termios.h
tgmath.h
time.h	fix const-correctness of argument to stime	2014-01-07 03:02:14 -05:00
ucontext.h
ulimit.h
unistd.h	add issetugid function to check for elevated privilege	2014-07-19 21:39:18 -04:00
utime.h
utmp.h	fix namespace violations in utmpx.h	2014-01-08 19:36:29 -05:00
utmpx.h	fix namespace violations in utmpx.h	2014-01-08 19:36:29 -05:00
values.h
wait.h	add workaround header for wait.h remapping to sys/wait.h	2013-09-01 01:01:31 -04:00
wchar.h	restore type of NULL to void * except when used in C++ programs	2013-11-24 21:42:55 -05:00
wctype.h	fix feature test macro logic for _BSD_SOURCE	2013-08-02 18:14:44 -04:00
wordexp.h