hash - #endif #define HASHP 104729 int main(int argc, char...

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/* * hash: Takes a file and computes a "hash" value by adding together all * the values in the file mod some largish prime. * * Once the basic system calls are complete, this should work on any * file the system supports. However, it's probably of most use for * testing your file system code. * * This should really be replaced with a real hash, like MD5 or SHA-1. */ #include <stdio.h> #include <unistd.h> #include <fcntl.h> #include <err.h> #ifdef HOST #include "hostcompat.h"
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Unformatted text preview: #endif #define HASHP 104729 int main(int argc, char *argv) { int fd; char readbuf[1]; int j = 0; #ifdef HOST hostcompat_init(argc, argv); #endif if (argc != 2) { errx(1, "Usage: hash filename"); } fd = open(argv[1], O_RDONLY, 0664); if (fd<0) { err(1, "%s", argv[1]); } for (;;) { if (read(fd, readbuf, 1) <= 0) break; j = ((j*8) + (int) readbuf[0]) % HASHP; } close(fd); printf("Hash : %d\n", j); return 0; }...
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This note was uploaded on 11/10/2009 for the course CS 536 taught by Professor Lums during the Spring '09 term at Indiana.

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