31 lines
637 B
C
31 lines
637 B
C
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <fcntl.h>
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#define SZBUF 256
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int main(int argc, char const *argv[]){
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char buf[SZBUF];
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int fs,fd,n,m;
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if (argc<3){
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fprintf(stderr,"Usage : %s <SRC_FILE><bSR_FILE> \r",argv[0]);
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exit (1);
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} fs=open (argv[1], O_RDONLY);
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if (fs==-1){
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perror("Opening source file fails");
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exit(2);
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} fd=open (argv[2], O_WRONLY|O_TRUNC|O_CREAT,0b00);
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if (fd==-1){
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perror("Opening destination file fails");
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exit(3);
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} while (n=read(fs,buf,SZBUF)){
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m=write(fd,buf,n);
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if (m==-1){
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perror("Writing in file fails");
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exit(4);
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}
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} close(fs);
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close(fd);
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exit(0);
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}
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