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annotate tests/read_file.c @ 0:6ce4443e7545

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Add the draft of an API to collect statistics on LXC
author Louis Opter <kalessin@kalessin.fr>
date Wed, 29 Dec 2010 23:28:14 +0100
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6ce4443e7545 Add the draft of an API to collect statistics on LXC
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1 #include <sys/types.h>
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2
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3 #include <err.h>
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4 #include <fcntl.h>
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5 #include <stdlib.h>
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6 #include <string.h>
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7 #include <unistd.h>
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8
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9 #include "lxcstats.h"
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10 #include "_lxcstats.h"
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11
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12 int
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13 main(void)
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14 {
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15 char reference[1024];
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16 int rdsize;
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17 char *trial;
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18 size_t size;
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19 int fd;
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20
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21 fd = open("/etc/hostname", O_RDONLY);
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22 if (fd == -1)
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23 err(EXIT_FAILURE, "can't open /etc/hostname");
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24
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25 size = _lxcst_read_file("/etc/hostname", &trial);
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26 if (!trial)
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27 err(EXIT_FAILURE, "can't read /etc/hostname");
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28
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29 rdsize = read(fd, reference, sizeof(reference));
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30 if (rdsize == -1)
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31 err(EXIT_FAILURE, "can't read /etc/hostname");
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32
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33 if ((size_t)rdsize != size)
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34 errx(EXIT_FAILURE, "sizes are different");
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35
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36 if (memcmp(reference, trial, size))
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37 errx(EXIT_FAILURE, "buffers are different");
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38
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39 free(trial);
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40
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41 return (EXIT_SUCCESS);
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42 }