41 lines
652 B
C
41 lines
652 B
C
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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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#include<stdlib.h>
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#define szbuf 256
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int main(int argc, char const *argv[])
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{
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char buf[szbuf];
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int f1,f2,n,m;
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if(argc<3)
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{
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fprintf(stderr, "Usage : %s <SRC.FILE><TRUC.FILE>",argv[1]);
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exit(1);
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}
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f1 = open(argv[1],O_RDONLY);
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if(f1 == -1)
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{
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perror("Opening source file fails");
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exit(2);
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}
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f2 = open(argv[2],O_WRONLY|O_TRUNC|O_CREAT,0600);
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if(f2 == -1)
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{
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perror("Opening destination file fails");
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exit(3);
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}
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while(n = read(f1,buf,szbuf))
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{
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m = write(f2,buf,n);
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if(m == -1)
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{
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perror("Writing in file fails");
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exit(4);
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}
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}
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close(f1);
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close(f2);
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exit(0);
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}
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