160     FILE *f;  in read_meminfo()  local
162     f = fopen("/proc/meminfo", "r");  in read_meminfo()
163     if (!f) return errno;  in read_meminfo()
165     while (fgets(line, MAX_LINE, f)) {  in read_meminfo()
172     fclose(f);  in read_meminfo()
178     FILE *f;  in read_stat()  local
180     f = fopen("/proc/stat", "r");  in read_stat()
181     if (!f) return errno;  in read_stat()
183     while (fgets(line, MAX_LINE, f)) {  in read_stat()
195     fclose(f);  in read_stat()
201     FILE *f;  in read_vmstat()  local
203     f = fopen("/proc/vmstat", "r");  in read_vmstat()
204     if (!f) return errno;  in read_vmstat()
206     while (fgets(line, MAX_LINE, f)) {  in read_vmstat()
210     fclose(f);  in read_vmstat()