diff options
Diffstat (limited to 'libc-top-half/musl/src/linux/wait4.c')
-rw-r--r-- | libc-top-half/musl/src/linux/wait4.c | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/libc-top-half/musl/src/linux/wait4.c b/libc-top-half/musl/src/linux/wait4.c new file mode 100644 index 0000000..83650e3 --- /dev/null +++ b/libc-top-half/musl/src/linux/wait4.c @@ -0,0 +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 *ru) +{ + 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); +} |