39 lines
637 B
C
39 lines
637 B
C
#include <u.h>
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#include <lib9.h>
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// Change-Id: I1cfd642d29a3955499b3507f56f0449d1710700e
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// sys/src/nxm/port/devcons.c:
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// make reads on #c/sysstat return only as many bytes as
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// requested
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void
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main(void)
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{
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int ret; // 0 = pass, 1 = fail
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int fd, n;
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char buf[1];
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fd = open("/dev/sysstat", OREAD);
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if(fd < 0){
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print("FAIL: couldn't open /dev/sysstat: %r\n");
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exits("FAIL");
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}
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ret = 0;
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for(;;){
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n = read(fd, buf, sizeof(buf));
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if(n <= 0)
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break;
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if(n > sizeof(buf))
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ret = 1;
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}
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close(fd);
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if(ret){
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print("FAIL: %d bytes read from /dev/sysstat\n", n);
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exits("FAIL");
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}
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print("PASS\n");
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exits("PASS");
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}
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