RepoMirrors
/
musl
mirror of git://git.musl-libc.org/musl
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity
musl/include/sys/wait.h

60 lines
1.3 KiB
C
Raw Normal View History

initial check-in, version 0.5.0
2011-02-12 05:22:29 +00:00
#ifndef _SYS_WAIT_H
#define _SYS_WAIT_H
#ifdef __cplusplus
extern "C" {
#endif
default features: make musl usable without feature test macros the old behavior of exposing nothing except plain ISO C can be obtained by defining __STRICT_ANSI__ or using a compiler option (such as -std=c99) that predefines it. the new default featureset is POSIX with XSI plus _BSD_SOURCE. any explicit feature test macros will inhibit the default. installation docs have also been updated to reflect this change.
2012-09-08 03:13:55 +00:00
#include <features.h>
initial check-in, version 0.5.0
2011-02-12 05:22:29 +00:00
#define __NEED_pid_t
#define __NEED_id_t
#include <bits/alltypes.h>
refactor headers, especially alltypes.h, and improve C++ ABI compat the arch-specific bits/alltypes.h.sh has been replaced with a generic alltypes.h.in and minimal arch-specific bits/alltypes.h.in. this commit is intended to have no functional changes except: - exposing additional symbols that POSIX allows but does not require - changing the C++ name mangling for some types - fixing the signedness of blksize_t on powerpc (POSIX requires signed) - fixing the limit macros for sig_atomic_t on x86_64 - making dev_t an unsigned type (ABI matching goal, and more logical) in addition, some types that were wrongly defined with long on 32-bit archs were changed to int, and vice versa; this change is non-functional except for the possibility of making pointer types mismatch, and only affects programs that were using them incorrectly, and only at build-time, not runtime. the following changes were made in the interest of moving non-arch-specific types out of the alltypes system and into the headers they're associated with, and also will tend to improve application compatibility: - netdb.h now includes netinet/in.h (for socklen_t and uint32_t) - netinet/in.h now includes sys/socket.h and inttypes.h - sys/resource.h now includes sys/time.h (for struct timeval) - sys/wait.h now includes signal.h (for siginfo_t) - langinfo.h now includes nl_types.h (for nl_item) for the types in stdint.h: - types which are of no interest to other headers were moved out of the alltypes system. - fast types for 8- and 64-bit are hard-coded (at least for now); only the 16- and 32-bit ones have reason to vary by arch. and the following types have been changed for C++ ABI purposes; - mbstate_t now has a struct tag, __mbstate_t - FILE's struct tag has been changed to _IO_FILE - DIR's struct tag has been changed to __dirstream - locale_t's struct tag has been changed to __locale_struct - pthread_t is defined as unsigned long in C++ mode only - fpos_t now has a struct tag, _G_fpos64_t - fsid_t's struct tag has been changed to __fsid_t - idtype_t has been made an enum type (also required by POSIX) - nl_catd has been changed from long to void * - siginfo_t's struct tag has been removed - sigset_t's has been given a struct tag, __sigset_t - stack_t has been given a struct tag, sigaltstack - suseconds_t has been changed to long on 32-bit archs - [u]intptr_t have been changed from long to int rank on 32-bit archs - dev_t has been made unsigned summary of tests that have been performed against these changes: - nsz's libc-test (diff -u before and after) - C++ ABI check symbol dump (diff -u before, after, glibc) - grepped for __NEED, made sure types needed are still in alltypes - built gcc 3.4.6
2013-07-22 15:22:36 +00:00
typedef enum {
P_ALL = 0,
P_PID = 1,
P_PGID = 2
} idtype_t;
initial check-in, version 0.5.0
2011-02-12 05:22:29 +00:00
pid_t wait (int *);
pid_t waitpid (pid_t, int *, int );
prototype wait3 and wait4
2011-02-19 07:26:11 +00:00
adjust sys/wait.h not to produde errors in strict ISO C feature profile siginfo_t is not available from signal.h when the strict ISO C feature profile (e.g. passing -std=c99 to gcc without defining any other feature test macros) is used, but the type is needed to declare waitid. using sys/wait.h (or any POSIX headers) in strict ISO C mode is an application bug, but in the interest of compatibility, it's best to avoid producing gratuitous errors. the simplest fix I could find is suppressing the declaration of waitid (and also signal.h inclusion, since it's not needed for anything else) in this case, while still exposing everything else in sys/wait.h
2013-11-09 05:04:02 +00:00
#if defined(_POSIX_SOURCE) || defined(_POSIX_C_SOURCE) \
|| defined(_XOPEN_SOURCE) || defined(_GNU_SOURCE) \
|| defined(_BSD_SOURCE)
#include <signal.h>
int waitid (idtype_t, id_t, siginfo_t *, int);
#endif
support _BSD_SOURCE feature test macro patch by Isaac Dunham. matched closely (maybe not exact) to glibc's idea of what _BSD_SOURCE should make visible.
2012-05-23 01:52:08 +00:00
#if defined(_GNU_SOURCE) || defined(_BSD_SOURCE)
prototype wait3 and wait4
2011-02-19 07:26:11 +00:00
#include <sys/resource.h>
pid_t wait3 (int *, int, struct rusage *);
pid_t wait4 (pid_t, int *, int, struct rusage *);
#endif
initial check-in, version 0.5.0
2011-02-12 05:22:29 +00:00
move wait.h macros out of bits. they do not vary.
2011-04-21 18:27:28 +00:00
#define WNOHANG 1
#define WUNTRACED 2
#define WSTOPPED 2
#define WEXITED 4
#define WCONTINUED 8
#define WNOWAIT 0x1000000
wait.h: add linux specific, thread-related waitpid() flags these flags are needed in order to be able to handle lwp id's which the kernel returns after clone() calls for new threads via ptrace(PTRACE_GETEVENTMSG). fortunately, they're the same for all archs and in the reserved namespace.
2013-01-01 07:07:26 +00:00
#define __WNOTHREAD 0x20000000
#define __WALL 0x40000000
#define __WCLONE 0x80000000
move wait.h macros out of bits. they do not vary.
2011-04-21 18:27:28 +00:00
#define WEXITSTATUS(s) (((s) & 0xff00) >> 8)
#define WTERMSIG(s) ((s) & 0x7f)
#define WSTOPSIG(s) WEXITSTATUS(s)
#define WCOREDUMP(s) ((s) & 0x80)
#define WIFEXITED(s) (!WTERMSIG(s))
fix definitions of WIFSTOPPED and WIFSIGNALED to support up to signal 127 mips has signal numbers up to 127 (formerly, up to 128, but the last one never worked right and caused kernel panic when used), so 127 in the "signal number" field of the wait status is insufficient for determining that the process was stopped. in addition, a nonzero value in the upper bits must be present, indicating the signal number which caused the process to be stopped. details on this issue can be seen in the email with message id CAAG0J9-d4BfEhbQovFqUAJ3QoOuXScrpsY1y95PrEPxA5DWedQ@mail.gmail.com on the linux-mips mailing list, archived at: http://www.linux-mips.org/archives/linux-mips/2013-06/msg00552.html and in the associated thread about fixing the mips kernel bug. commit 4a96b948687166da26a6c327e6c6733ad2336c5c fixed the corresponding issue in uClibc, but introduced a multiple-evaluation issue for the WIFSTOPPED macro. for the most part, none of these issues affected pure musl systems, since musl has up until now (incorrectly) defined SIGRTMAX as 64 on all archs, even mips. however, interpreting status of non-musl programs on mips may have caused problems. with this change, the full range of signal numbers can be made available on mips.
2013-08-11 03:33:54 +00:00
#define WIFSTOPPED(s) ((short)((((s)&0xffff)*0x10001)>>8) > 0x7f00)
fix signed and unsigned comparision in macros in public headers gcc -Wsign-compare warns about expanded macros that were defined in standard headers (before gcc 4.8) which can make builds fail that use -Werror. changed macros: WIFSIGNALED, __CPU_op_S
2014-02-11 09:51:16 +00:00
#define WIFSIGNALED(s) (((s)&0xffff)-1U < 0xffu)
move wait.h macros out of bits. they do not vary.
2011-04-21 18:27:28 +00:00
#define WIFCONTINUED(s) ((s) == 0xffff)
initial check-in, version 0.5.0
2011-02-12 05:22:29 +00:00
#ifdef __cplusplus
}
#endif
#endif