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https://github.com/ada-dmitry/TMP_C712.git
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24 lines
721 B
C
24 lines
721 B
C
#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <sys/mman.h>
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#include <unistd.h>
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#include <fcntl.h>
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int main(int argc, char *argv[]){
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int fd_src, fd_dst;
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caddr_t addr_src, addr_dst;
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struct stat filestat;
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fd_src = open(argv[1], O_RDONLY);
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fd_dst = open(argv[2], O_RDWR | O_CREAT);
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fstat(fd_src, &filestat);
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lseek(fd_dst, filestat.st_size - 1, SEEK_SET);
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write(fd_dst, "", 1);
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addr_src = mmap((caddr_t)0, filestat.st_size, PROT_READ, MAP_SHARED, fd_src, 0);
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addr_dst = mmap((caddr_t)0, filestat.st_size, PROT_READ | PROT_WRITE, MAP_SHARED, fd_dst, 0);
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memcpy(addr_dst, addr_src, filestat.st_size);
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exit(0);
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} |