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#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <errno.h>
#include <cutils/iosched_policy.h>
static char *classes[] = {"none", "rt", "be", "idle", NULL};
int ionice_main(int argc, char *argv[])
{
IoSchedClass clazz = IoSchedClass_NONE;
int ioprio = 0;
int pid;
if(argc != 2 && argc != 4) {
fprintf(stderr, "usage: ionice <pid> [none|rt|be|idle] [prio]\n");
return 1;
}
if (!(pid = atoi(argv[1]))) {
fprintf(stderr, "Invalid pid specified\n");
return 1;
}
if (argc == 2) {
if (android_get_ioprio(pid, &clazz, &ioprio)) {
fprintf(stderr, "Failed to read priority (%s)\n", strerror(errno));
return 1;
}
fprintf(stdout, "Pid %d, class %s (%d), prio %d\n", pid, classes[clazz], clazz, ioprio);
return 0;
}
if (!strcmp(argv[2], "none")) {
clazz = IoSchedClass_NONE;
} else if (!strcmp(argv[2], "rt")) {
clazz = IoSchedClass_RT;
} else if (!strcmp(argv[2], "be")) {
clazz = IoSchedClass_BE;
} else if (!strcmp(argv[2], "idle")) {
clazz = IoSchedClass_IDLE;
} else {
fprintf(stderr, "Unsupported class '%s'\n", argv[2]);
return 1;
}
ioprio = atoi(argv[3]);
printf("Setting pid %d i/o class to %d, prio %d\n", pid, clazz, ioprio);
if (android_set_ioprio(pid, clazz, ioprio)) {
fprintf(stderr, "Failed to set priority (%s)\n", strerror(errno));
return 1;
}
return 0;
}
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