29 lines
466 B
C
29 lines
466 B
C
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#include <stdio.h>
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#include <stdlib.h>
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int main()
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{
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FILE* fp = fopen("/dev/uptime", "r");
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if (!fp)
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{
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perror("fopen");
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return 1;
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}
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char buf[4096];
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size_t nread = fread(buf, sizeof(buf) - 1, 1, fp);
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if (ferror(fp))
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{
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perror("fread");
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return 1;
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}
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buf[nread] = 0; // null terminate it :)
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long ms_uptime = atol(buf);
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printf("up for %ld seconds\n", ms_uptime / 1000);
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fclose(fp);
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}
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