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QNX: fix QProcess fd inheritance

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Under QNX, QProcess was not inheriting the parent's file descriptors. This
patch fills in the fd_map array, containing the file descriptors to be
inherited, which is passed to spawn(), accordingly.

Change-Id: Ia160abda88c1ffede877301aeae93a97c2b35320
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
Reviewed-by: Sérgio Martins <sergio.martins.qnx@kdab.com>
This commit is contained in:
Rafael Roquetto 2012-11-20 18:30:15 -02:00 committed by The Qt Project
parent 171938ce1a
commit 226f245c71
1 changed files with 18 additions and 3 deletions
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21
src/corelib/io/qprocess_unix.cpp
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@ -107,6 +107,8 @@ QT_END_NAMESPACE
#include <stdlib.h>
#include <string.h>
#ifdef Q_OS_QNX
#include "qvarlengtharray.h"
#include <spawn.h>
#include <sys/neutrino.h>
#endif
@ -779,8 +781,21 @@ static pid_t doSpawn(int fd_count, int fd_map[], char **argv, char **envp,
pid_t QProcessPrivate::spawnChild(const char *workingDir, char **argv, char **envp)
{
const int fd_count = 3;
int fd_map[fd_count];
// we need to manually fill in fd_map
// to inherit the file descriptors from
// the parent
const int fd_count = sysconf(_SC_OPEN_MAX);
QVarLengthArray<int, 1024> fd_map(fd_count);
for (int i = 3; i < fd_count; ++i) {
// here we rely that fcntl returns -1 and
// sets errno to EBADF
const int flags = ::fcntl(i, F_GETFD);
fd_map[i] = ((flags >= 0) && !(flags & FD_CLOEXEC))
? i : SPAWN_FDCLOSED;
}
switch (processChannelMode) {
case QProcess::ForwardedChannels:
fd_map[0] = stdinChannel.pipe[0];
@ -799,7 +814,7 @@ pid_t QProcessPrivate::spawnChild(const char *workingDir, char **argv, char **en
break;
}
pid_t childPid = doSpawn(fd_count, fd_map, argv, envp, workingDir, false);
pid_t childPid = doSpawn(fd_count, fd_map.data(), argv, envp, workingDir, false);
if (childPid == -1) {
QString error = qt_error_string(errno);