ref: dfb4b522830edab8f3856289d326d6cf5e930644
dir: /sys/src/ape/lib/ap/plan9/times.c/
#include <sys/types.h> #include <sys/stat.h> #include <fcntl.h> #include <sys/times.h> #include <unistd.h> #include <errno.h> #include <string.h> #include <stdlib.h> static char* skip(char *p) { while(*p == ' ') p++; while(*p != ' ' && *p != 0) p++; return p; } clock_t times(struct tms *buf) { char b[200], *p; int f; unsigned long r; memset(b, 0, sizeof(b)); f = open("/dev/cputime", O_RDONLY); if(f >= 0) { lseek(f, SEEK_SET, 0); read(f, b, sizeof(b)); close(f); } p = b; if(buf) buf->tms_utime = atol(p); p = skip(p); if(buf) buf->tms_stime = atol(p); p = skip(p); r = atol(p); if(buf){ p = skip(p); buf->tms_cutime = atol(p); p = skip(p); buf->tms_cstime = atol(p); } return r; }