mirror of https://github.com/hsoft/collapseos.git
30 lines
665 B
C
30 lines
665 B
C
#include <stdlib.h>
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#include <stdio.h>
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#include <fcntl.h>
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#include <unistd.h>
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/* Update the "LATEST" offset of target Forth binary according to filesize. */
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#define OFFSET 0x08
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int main(int argc, char **argv)
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{
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if (argc != 2) {
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fprintf(stderr, "Usage: ./slatest fname\n");
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return 1;
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}
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FILE *fp = fopen(argv[1], "r+");
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if (!fp) {
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fprintf(stderr, "Can't open %s.\n", argv[1]);
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return 1;
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}
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fseek(fp, 0, SEEK_END);
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unsigned int bytecount = ftell(fp);
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fseek(fp, OFFSET, SEEK_SET);
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char buf[2];
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buf[0] = bytecount & 0xff;
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buf[1] = bytecount >> 8;
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fwrite(buf, 2, 1, fp);
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fclose(fp);
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}
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