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annotate bootmatch/comp_readbin.c @ 25:afd760eb1f8d

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doc/C1xx-updates: new article
author Mychaela Falconia <falcon@freecalypso.org>
date Sun, 11 Jun 2023 20:57:23 +0000
parents bfcc8180cf3c
children
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9
bfcc8180cf3c bootmatch compiler written
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1 /*
bfcc8180cf3c bootmatch compiler written
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2 * Bootmatch compiler: here we read the binary file.
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3 */
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4
bfcc8180cf3c bootmatch compiler written
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5 #include <sys/types.h>
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6 #include <sys/file.h>
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7 #include <sys/stat.h>
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8 #include <stdio.h>
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9 #include <stdlib.h>
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10 #include <unistd.h>
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11 #include "comp_defs.h"
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12
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13 extern u_char boot_image[BOOT_BLOCK_SIZE];
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14
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15 void
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16 read_bin_file(filename)
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17 char *filename;
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18 {
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19 int fd;
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20 struct stat st;
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21
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22 fd = open(filename, O_RDONLY);
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23 if (fd < 0) {
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24 perror(filename);
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25 exit(1);
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26 }
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27 fstat(fd, &st);
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28 if (!S_ISREG(st.st_mode)) {
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29 fprintf(stderr, "error: %s is not a regular file\n", filename);
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30 exit(1);
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31 }
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32 if (st.st_size != BOOT_BLOCK_SIZE) {
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33 fprintf(stderr, "error: %s has wrong length\n", filename);
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34 exit(1);
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35 }
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36 read(fd, boot_image, BOOT_BLOCK_SIZE);
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37 close(fd);
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38 }