blob: 9e8baa6e7602498bc634f2b316678c2b1890342b (
plain) (
blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
|
#include "cat.h"
/* Function writes the contents of an opened file descriptor to stdout */
int cfd(int fd, void *buf) {
int br;
/* Use the buffer to read the file in blocks, writing each block to stdout
* as we go */
while ((br = read(fd, buf, BUFLEN)) > 0) {
fwrite(buf, 1, br, stdout);
}
/* If the last return value for br() was -1, there was an error; 0 is what
* we expect */
if (br == -1) {
perror(__FUNCTION__);
return -1;
}
/* Force a write of any still-buffered data to stdout */
if (fflush(stdout) != 0) {
perror(__FUNCTION__);
return -1;
}
/* Return success, since apparently nothing went wrong before we got here
* */
return 0;
}
|