1 #include <stdio.h> 2 #include <stdlib.h> 3 #include <string.h> 4 #include <unistd.h> 5 #include <errno.h> 6 7 #include <cutils/iosched_policy.h> 8 9 static char *classes[] = {"none", "rt", "be", "idle", NULL}; 10 11 int ionice_main(int argc, char *argv[]) 12 { 13 IoSchedClass clazz = IoSchedClass_NONE; 14 int ioprio = 0; 15 int pid; 16 17 if(argc != 2 && argc != 4) { 18 fprintf(stderr, "usage: ionice <pid> [none|rt|be|idle] [prio]\n"); 19 return 1; 20 } 21 22 if (!(pid = atoi(argv[1]))) { 23 fprintf(stderr, "Invalid pid specified\n"); 24 return 1; 25 } 26 27 if (argc == 2) { 28 if (android_get_ioprio(pid, &clazz, &ioprio)) { 29 fprintf(stderr, "Failed to read priority (%s)\n", strerror(errno)); 30 return 1; 31 } 32 fprintf(stdout, "Pid %d, class %s (%d), prio %d\n", pid, classes[clazz], clazz, ioprio); 33 return 0; 34 } 35 36 if (!strcmp(argv[2], "none")) { 37 clazz = IoSchedClass_NONE; 38 } else if (!strcmp(argv[2], "rt")) { 39 clazz = IoSchedClass_RT; 40 } else if (!strcmp(argv[2], "be")) { 41 clazz = IoSchedClass_BE; 42 } else if (!strcmp(argv[2], "idle")) { 43 clazz = IoSchedClass_IDLE; 44 } else { 45 fprintf(stderr, "Unsupported class '%s'\n", argv[2]); 46 return 1; 47 } 48 49 ioprio = atoi(argv[3]); 50 51 printf("Setting pid %d i/o class to %d, prio %d\n", pid, clazz, ioprio); 52 if (android_set_ioprio(pid, clazz, ioprio)) { 53 fprintf(stderr, "Failed to set priority (%s)\n", strerror(errno)); 54 return 1; 55 } 56 57 return 0; 58 } 59
