void xregcomp(regex_t *preg, char *rexec, int cflags);
char *xtzset(char *new);
void xsignal(int signal, void *handler);
-unsigned xcount_cpus(void);
// lib.c
void verror_msg(char *msg, int err, va_list va);
if (sigaction(signal, sa, 0)) perror_exit("xsignal %d", signal);
}
-
-unsigned xcount_cpus(void)
-{
- int len = 0, i, fd = xopen("/proc/stat", O_RDONLY);
- unsigned cpus = 0;
-
- for (;;) {
- if (1>(i = xread(fd, libbuf, sizeof(libbuf)-len))) break;
- len += i;
- // Each cpu# line has data after it, so last 5 bytes of file can't match
- for (i = 0; i<len-5; i++)
- if (!strncmp(libbuf+i, "\ncpu", 4) && isdigit(libbuf[i+4])) cpus++;
- memmove(libbuf, libbuf+i, 5);
- }
- close(fd);
-
- return cpus;
-}
}
// If getaffinity failed or --all, count cpu entries in proc
- if (!nproc) nproc = xcount_cpus();
+ if (!nproc) nproc = sysconf(_SC_NPROCESSORS_CONF);
xprintf("%u\n", nproc);
}