30 lines
521 B
C
30 lines
521 B
C
#include<stdio.h>
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#include<stdlib.h>
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#include<fcntl.h>
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#define BUFSIZE 256
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int main(int argc, char * argv[]){
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int r,x,f,y,n;
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char buf[BUFSIZE];
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if(argc<2){
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fprintf(stdin,"Usage: %s <file>\n",argv[0]);
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exit(1);
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}
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f=open(argv[1],O_WRONLY|O_CREAT|O_TRUNC,0600);
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if(f==-1){
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perror("Opening file failed !");
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exit(2);
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}
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write(1,"Numb --> ",9);
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while((n=read(0,buf,BUFSIZE))!=0){
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r=write(f,buf,n);
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if(r==-1){
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perror("writing failed");
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exit(3);
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}
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write(1,"Numb --> ",9);
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}
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close(f);
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exit(0);
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}
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