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  1.  
  2. #include <stdio.h>
  3. #include <unistd.h>
  4. #include <fcntl.h>
  5. #include <sys/types.h>
  6. #include <inttypes.h>
  7.  
  8.  
  9. int main(int argc, char **argv) {
  10.         int fd1 = open("/etc/passwd", O_RDONLY);
  11.         int fd2 = dup(fd1);
  12.         char buf[19];
  13.  
  14.         printf("fd#%d read: %d\n", read(fd1, buf, sizeof(buf)));
  15.         printf("fd#%d: pos: %"PRIdPTR"\n", fd1, lseek(fd1, 0, SEEK_CUR));
  16.         printf("fd#%d: pos: %"PRIdPTR"\n", fd2, lseek(fd2, 0, SEEK_CUR));
  17.         return 0;
  18. }
  19.  
Success #stdin #stdout 0s 2160KB
comments (?)
stdin
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Standard input is empty
stdout
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fd#19 read: 19
fd#3: pos: 19
fd#4: pos: 19
https://ideone.com/l34Bwu
language:
C (gcc 8.3)
created:
8 years ago
visibility:
public

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