blob: 47b4bbee60c7d552786d8c3ad1b6a163c50a30a7 (
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
31
32
33
|
#include "cat.h"
/* Function writes the contents of an opened file descriptor to stdout */
int cfp(FILE *fp, void *buf) {
size_t br;
/* Use the buffer to read the file in blocks, writing each block to stdout
* as we go */
while ((br = fread(buf, 1, BUFLEN, fp)) > 0) {
if (fwrite(buf, 1, br, stdout) == 0) {
perror(__FUNCTION__);
return -1;
}
}
/* If the last return value for br() was -1, there was an error; 0 is what
* we expect */
if (ferror(fp) != 0 || ferror(stdout) != 0) {
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;
}
|