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28
29
30#include <QtCore/QCoreApplication>
31#include <QtCore/QFile>
32
33int main(int argc, char *argv[])
34{
35 if (argc < 2) {
36 printf(format: "usage: stdinprocess_helper <all|line <0|1>>\n");
37 printf(format: "echos all its input to its output.\n");
38 return 1;
39 }
40
41 QFile file;
42
43 if (strcmp(s1: argv[1], s2: "all") == 0) {
44 file.open(stdin, ioFlags: QFile::ReadWrite);
45 printf(format: "%s", file.readAll().constData());
46 } else if (strcmp(s1: argv[1], s2: "line") == 0) {
47 if (strcmp(s1: argv[2], s2: "0") == 0) {
48 file.open(stdin, ioFlags: QFile::ReadWrite);
49 } else {
50 file.open(fd: 0, ioFlags: QFile::ReadWrite);
51 }
52
53 char line[1024];
54 while (file.readLine(data: line, maxlen: sizeof(line)) > 0) {
55 printf(format: "%s", line);
56 fflush(stdout);
57 }
58 }
59 return 0;
60}
61

source code of qtbase/tests/auto/corelib/io/qfile/stdinprocess/main.cpp