The old wait4() syscall used by waitpid() before is not available everywhere. Switch to the waitid() syscall which is the new replacement.
Signed-off-by: Thomas Weißschuh thomas.weissschuh@linutronix.de --- tools/include/nolibc/sys.h | 68 ++++++++++++++++++++++++++++++++++++++-------- 1 file changed, 56 insertions(+), 12 deletions(-)
diff --git a/tools/include/nolibc/sys.h b/tools/include/nolibc/sys.h index 43b1bfa7a582ea926a062ff17fcf3e1b79be187d..8c929ddb62eae81d4e0d36dec72bc1718d9a1082 100644 --- a/tools/include/nolibc/sys.h +++ b/tools/include/nolibc/sys.h @@ -1249,6 +1249,7 @@ int unlink(const char *path) * pid_t wait(int *status); * pid_t wait4(pid_t pid, int *status, int options, struct rusage *rusage); * pid_t waitpid(pid_t pid, int *status, int options); + * int waitid(idtype_t idtype, id_t id, siginfo_t *infop, int options); */
static __attribute__((unused)) @@ -1273,18 +1274,6 @@ pid_t wait4(pid_t pid, int *status, int options, struct rusage *rusage) return __sysret(sys_wait4(pid, status, options, rusage)); }
- -static __attribute__((unused)) -pid_t waitpid(pid_t pid, int *status, int options) -{ - return __sysret(sys_wait4(pid, status, options, NULL)); -} - - -/* - * int waitid(idtype_t idtype, id_t id, siginfo_t *infop, int options); - */ - static __attribute__((unused)) int sys_waitid(int which, pid_t pid, siginfo_t *infop, int options, struct rusage *rusage) { @@ -1298,6 +1287,61 @@ int waitid(int which, pid_t pid, siginfo_t *infop, int options) }
+static __attribute__((unused)) +pid_t waitpid(pid_t pid, int *status, int options) +{ + int idtype, ret; + siginfo_t info; + pid_t id; + + if (pid < -1) { + idtype = P_PGID; + id = -pid; + } else if (pid == -1) { + idtype = P_ALL; + id = 0; + } else if (pid == 0) { + idtype = P_PGID; + id = 0; + } else { + idtype = P_PID; + id = pid; + } + + options |= WEXITED; + + ret = waitid(idtype, id, &info, options); + if (ret) + return ret; + + switch (info.si_code) { + case 0: + *status = 0; + break; + case CLD_EXITED: + *status = (info.si_status & 0xff) << 8; + break; + case CLD_KILLED: + *status = info.si_status & 0x7f; + break; + case CLD_DUMPED: + *status = (info.si_status & 0x7f) | 0x80; + break; + case CLD_STOPPED: + case CLD_TRAPPED: + *status = (info.si_status << 8) + 0x7f; + break; + case CLD_CONTINUED: + *status = 0xffff; + break; + default: + return -1; + } + + return info.si_pid; +} + + /* * ssize_t write(int fd, const void *buf, size_t count); */