bob/libscio
1
0
Fork 0
Code Issues 2 Pull Requests Actions Packages Projects Releases Wiki Activity

enhanced read to restart when interrupted, and to read until really done

Browse Source
This commit is contained in:
Bob Polis 2020-04-28 16:27:31 +02:00
parent f2cf32410e
commit 484494b915
1 changed files with 18 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

19
fdiobuf.cpp
View File

@ -24,7 +24,24 @@ std::streambuf::int_type sc::io::fdiobuf::underflow() {
}
std::streamsize sc::io::fdiobuf::xsgetn(char* s, std::streamsize n) {
return ::read(_fd, s, n);
std::streamsize tot_read = 0;
std::streamsize next_amount = n;
while (next_amount) {
ssize_t num_read = ::read(_fd, s, next_amount);
if (num_read == -1) {
if (errno == EINTR) { // interrupted => restart
continue;
} else {
return -1; // real error
}
} else if (num_read == 0) { // EOF
break;
} else {
tot_read += num_read;
next_amount -= num_read;
}
}
return tot_read;
}
std::streambuf::int_type sc::io::fdiobuf::overflow(std::streambuf::int_type c) {