58 lines
1.3 KiB
C
58 lines
1.3 KiB
C
#include <stdio.h>
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int
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main(int argc, char *argv[])
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{
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int new_frequency = 0;
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char *new_governor = NULL;
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char buf[4096];
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FILE *f;
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if (argc != 3)
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{
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fprintf(stderr, "Invalid command. Syntax:\n");
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fprintf(stderr, "\tfreqset <frequency|governor> <freq-level|governor-name>\n");
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return 1;
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}
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if (seteuid(0))
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{
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fprintf(stderr, "Unable to assume root privileges\n");
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}
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if (!strcmp(argv[1], "frequency"))
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{
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new_frequency = atoi(argv[2]);
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f = fopen("/sys/devices/system/cpu/cpu0/cpufreq/scaling_setspeed", "w");
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if (!f)
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{
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fprintf(stderr, "Unable to open frequency interface for writing.\n");
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return 1;
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}
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fprintf(f, "%d\n", new_frequency);
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fclose(f);
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return 0;
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}
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else if (!strcmp(argv[1], "governor"))
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{
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f = fopen("/sys/devices/system/cpu/cpu0/cpufreq/scaling_governor", "w");
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if (!f)
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{
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fprintf(stderr, "Unable to open governor interface for writing.\n");
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return 1;
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}
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fprintf(f, "%s\n", argv[2]);
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fclose(f);
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return 0;
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}
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else
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{
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fprintf(stderr, "Unknown command.\n");
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return 1;
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}
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seteuid(-1);
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}
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