diff options
Diffstat (limited to 'libc/sysdeps/linux/common/wait4.c')
| -rw-r--r-- | libc/sysdeps/linux/common/wait4.c | 54 |
1 files changed, 54 insertions, 0 deletions
diff --git a/libc/sysdeps/linux/common/wait4.c b/libc/sysdeps/linux/common/wait4.c index cd042d5e7..486ffaab8 100644 --- a/libc/sysdeps/linux/common/wait4.c +++ b/libc/sysdeps/linux/common/wait4.c @@ -10,6 +10,7 @@ #include <sys/wait.h> #include <sys/resource.h> +#if defined(__NR_wait4) # define __NR___syscall_wait4 __NR_wait4 static __always_inline _syscall4(int, __syscall_wait4, __kernel_pid_t, pid, int *, status, int, opts, struct rusage *, rusage) @@ -32,6 +33,59 @@ pid_t __wait4_nocancel(pid_t pid, int *status, int opts, struct rusage *rusage) return __syscall_wait4(pid, status, opts, rusage); #endif } + +#else +pid_t __wait4_nocancel(pid_t pid, int *status, int opts, struct rusage *rusage) +{ + idtype_t type; + int __res; + siginfo_t info; + + info.si_pid = 0; + + if (pid < -1) { + type = P_PGID; + pid = -pid; + } else if (pid == -1) { + type = P_ALL; + } else if (pid == 0) { + type = P_PGID; + } else { + type = P_PID; + } + + __res = INLINE_SYSCALL(waitid, 5, type, pid, &info, opts|WEXITED, rusage); + + if ( __res < 0 ) + return __res; + + if (info.si_pid && status) { + int sw = 0; + switch (info.si_code) { + case CLD_CONTINUED: + sw = 0xffff; + break; + case CLD_DUMPED: + sw = (info.si_status & 0x7f) | 0x80; + break; + case CLD_EXITED: + sw = (info.si_status & 0xff) << 8; + break; + case CLD_KILLED: + sw = info.si_status & 0x7f; + break; + case CLD_STOPPED: + case CLD_TRAPPED: + sw = (info.si_status << 8) + 0x7f; + break; + } + *status = sw; + } + + return info.si_pid; +} +#endif + #ifdef __USE_BSD strong_alias(__wait4_nocancel,wait4) #endif |