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41c632824c
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.
56 lines
1.1 KiB
C
56 lines
1.1 KiB
C
#ifndef _SYS_WAIT_H
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#define _SYS_WAIT_H
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#ifdef __cplusplus
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extern "C" {
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#endif
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#include <features.h>
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#include <signal.h>
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#define __NEED_pid_t
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#define __NEED_id_t
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#include <bits/alltypes.h>
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typedef enum {
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P_ALL = 0,
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P_PID = 1,
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P_PGID = 2
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} idtype_t;
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pid_t wait (int *);
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int waitid (idtype_t, id_t, siginfo_t *, int);
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pid_t waitpid (pid_t, int *, int );
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#if defined(_GNU_SOURCE) || defined(_BSD_SOURCE)
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#include <sys/resource.h>
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pid_t wait3 (int *, int, struct rusage *);
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pid_t wait4 (pid_t, int *, int, struct rusage *);
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#endif
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#define WNOHANG 1
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#define WUNTRACED 2
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#define WSTOPPED 2
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#define WEXITED 4
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#define WCONTINUED 8
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#define WNOWAIT 0x1000000
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#define __WNOTHREAD 0x20000000
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#define __WALL 0x40000000
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#define __WCLONE 0x80000000
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#define WEXITSTATUS(s) (((s) & 0xff00) >> 8)
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#define WTERMSIG(s) ((s) & 0x7f)
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#define WSTOPSIG(s) WEXITSTATUS(s)
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#define WCOREDUMP(s) ((s) & 0x80)
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#define WIFEXITED(s) (!WTERMSIG(s))
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#define WIFSTOPPED(s) ((short)((((s)&0xffff)*0x10001)>>8) > 0x7f00)
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#define WIFSIGNALED(s) (((s)&0xffff)-1 < 0xffu)
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#define WIFCONTINUED(s) ((s) == 0xffff)
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#ifdef __cplusplus
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}
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#endif
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#endif
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