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[PseudoTerminal][NFC] Use llvm errno helpers 

Summary:
LLVM provide (str)errno helpers, so convert code to use it.

Also fixes warning:
/home/xbolva00/LLVM/llvm/tools/lldb/source/Host/common/PseudoTerminal.cpp:248:25: warning: ignoring return value of ‘char* strerror_r(int, char*, size_t)’, declared with attribute warn_unused_result [-Wunused-result]
             ::strerror_r(errno, error_str, error_len);

Reviewers: JDevlieghere

Reviewed By: JDevlieghere

Subscribers: abidh, lldb-commits

Differential Revision: https://reviews.llvm.org/D51591

llvm-svn: 341320
This commit is contained in:
David Bolvansky 2018-09-03 14:59:57 +00:00
parent d9fe7538a3
commit 26e97995c4
1 changed files with 20 additions and 11 deletions
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31
lldb/source/Host/common/PseudoTerminal.cpp
View File

@ -10,7 +10,8 @@
#include "lldb/Host/PseudoTerminal.h"
#include "lldb/Host/Config.h"
#include <errno.h>
#include "llvm/Support/Errno.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
@ -26,6 +27,14 @@ int posix_openpt(int flags);
using namespace lldb_private;
//----------------------------------------------------------------------
// Write string describing error number
//----------------------------------------------------------------------
static void ErrnoToStr(char *error_str, size_t error_len) {
std::string strerror = llvm::sys::StrError();
::snprintf(error_str, error_len, "%s", strerror.c_str());
}
//----------------------------------------------------------------------
// PseudoTerminal constructor
//----------------------------------------------------------------------
@ -88,14 +97,14 @@ bool PseudoTerminal::OpenFirstAvailableMaster(int oflag, char *error_str,
m_master_fd = ::posix_openpt(oflag);
if (m_master_fd < 0) {
if (error_str)
::strerror_r(errno, error_str, error_len);
ErrnoToStr(error_str, error_len);
return false;
}
// Grant access to the slave pseudo terminal
if (::grantpt(m_master_fd) < 0) {
if (error_str)
::strerror_r(errno, error_str, error_len);
ErrnoToStr(error_str, error_len);
CloseMasterFileDescriptor();
return false;
}
@ -103,7 +112,7 @@ bool PseudoTerminal::OpenFirstAvailableMaster(int oflag, char *error_str,
// Clear the lock flag on the slave pseudo terminal
if (::unlockpt(m_master_fd) < 0) {
if (error_str)
::strerror_r(errno, error_str, error_len);
ErrnoToStr(error_str, error_len);
CloseMasterFileDescriptor();
return false;
}
@ -143,7 +152,7 @@ bool PseudoTerminal::OpenSlave(int oflag, char *error_str, size_t error_len) {
if (m_slave_fd < 0) {
if (error_str)
::strerror_r(errno, error_str, error_len);
ErrnoToStr(error_str, error_len);
return false;
}
@ -175,7 +184,7 @@ const char *PseudoTerminal::GetSlaveName(char *error_str,
const char *slave_name = ::ptsname(m_master_fd);
if (error_str && slave_name == nullptr)
::strerror_r(errno, error_str, error_len);
ErrnoToStr(error_str, error_len);
return slave_name;
}
@ -213,7 +222,7 @@ lldb::pid_t PseudoTerminal::Fork(char *error_str, size_t error_len) {
if (pid < 0) {
// Fork failed
if (error_str)
::strerror_r(errno, error_str, error_len);
ErrnoToStr(error_str, error_len);
} else if (pid == 0) {
// Child Process
::setsid();
@ -229,23 +238,23 @@ lldb::pid_t PseudoTerminal::Fork(char *error_str, size_t error_len) {
// Acquire the controlling terminal
if (::ioctl(m_slave_fd, TIOCSCTTY, (char *)0) < 0) {
if (error_str)
::strerror_r(errno, error_str, error_len);
ErrnoToStr(error_str, error_len);
}
#endif
// Duplicate all stdio file descriptors to the slave pseudo terminal
if (::dup2(m_slave_fd, STDIN_FILENO) != STDIN_FILENO) {
if (error_str && !error_str[0])
::strerror_r(errno, error_str, error_len);
ErrnoToStr(error_str, error_len);
}
if (::dup2(m_slave_fd, STDOUT_FILENO) != STDOUT_FILENO) {
if (error_str && !error_str[0])
::strerror_r(errno, error_str, error_len);
ErrnoToStr(error_str, error_len);
}
if (::dup2(m_slave_fd, STDERR_FILENO) != STDERR_FILENO) {
if (error_str && !error_str[0])
::strerror_r(errno, error_str, error_len);
ErrnoToStr(error_str, error_len);
}
}
} else {