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#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;
}
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