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45 lines
1.3 KiB
45 lines
1.3 KiB
/* |
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* Copyright © 2018 Alexey Dobriyan <[email protected]> |
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* |
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* Permission to use, copy, modify, and distribute this software for any |
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* purpose with or without fee is hereby granted, provided that the above |
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* copyright notice and this permission notice appear in all copies. |
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* |
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES |
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF |
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR |
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES |
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN |
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF |
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
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*/ |
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// Test that values in /proc/uptime increment monotonically. |
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#undef NDEBUG |
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#include <assert.h> |
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#include <stdint.h> |
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#include <sys/types.h> |
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#include <sys/stat.h> |
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#include <fcntl.h> |
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#include "proc-uptime.h" |
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int main(void) |
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{ |
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uint64_t start, u0, u1, i0, i1; |
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int fd; |
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fd = open("/proc/uptime", O_RDONLY); |
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assert(fd >= 0); |
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proc_uptime(fd, &u0, &i0); |
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start = u0; |
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do { |
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proc_uptime(fd, &u1, &i1); |
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assert(u1 >= u0); |
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assert(i1 >= i0); |
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u0 = u1; |
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i0 = i1; |
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} while (u1 - start < 100); |
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return 0; |
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}
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