diff options
Diffstat (limited to 'src/linux/wait4.c')
| -rw-r--r-- | src/linux/wait4.c | 34 |
1 files changed, 32 insertions, 2 deletions
diff --git a/src/linux/wait4.c b/src/linux/wait4.c index 97f12cc5..83650e34 100644 --- a/src/linux/wait4.c +++ b/src/linux/wait4.c @@ -1,9 +1,39 @@ #define _GNU_SOURCE #include <sys/wait.h> #include <sys/resource.h> +#include <string.h> +#include <errno.h> #include "syscall.h" -pid_t wait4(pid_t pid, int *status, int options, struct rusage *usage) +pid_t wait4(pid_t pid, int *status, int options, struct rusage *ru) { - return syscall(SYS_wait4, pid, status, options, usage); + int r; +#ifdef SYS_wait4_time64 + if (ru) { + long long kru64[18]; + r = __syscall(SYS_wait4_time64, pid, status, options, kru64); + if (!r) { + ru->ru_utime = (struct timeval) + { .tv_sec = kru64[0], .tv_usec = kru64[1] }; + ru->ru_stime = (struct timeval) + { .tv_sec = kru64[2], .tv_usec = kru64[3] }; + char *slots = (char *)&ru->ru_maxrss; + for (int i=0; i<14; i++) + *(long *)(slots + i*sizeof(long)) = kru64[4+i]; + } + if (SYS_wait4_time64 == SYS_wait4 || r != -ENOSYS) + return __syscall_ret(r); + } +#endif + char *dest = ru ? (char *)&ru->ru_maxrss - 4*sizeof(long) : 0; + r = __syscall(SYS_wait4, pid, status, options, dest); + if (r>0 && ru && sizeof(time_t) > sizeof(long)) { + long kru[4]; + memcpy(kru, dest, 4*sizeof(long)); + ru->ru_utime = (struct timeval) + { .tv_sec = kru[0], .tv_usec = kru[1] }; + ru->ru_stime = (struct timeval) + { .tv_sec = kru[2], .tv_usec = kru[3] }; + } + return __syscall_ret(r); } |