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Diffstat (limited to 'utils/process/status.cpp')
| -rw-r--r-- | utils/process/status.cpp | 200 |
1 files changed, 200 insertions, 0 deletions
diff --git a/utils/process/status.cpp b/utils/process/status.cpp new file mode 100644 index 000000000000..a3cea8e09ebd --- /dev/null +++ b/utils/process/status.cpp @@ -0,0 +1,200 @@ +// Copyright 2010 The Kyua Authors. +// All rights reserved. +// +// Redistribution and use in source and binary forms, with or without +// modification, are permitted provided that the following conditions are +// met: +// +// * Redistributions of source code must retain the above copyright +// notice, this list of conditions and the following disclaimer. +// * Redistributions in binary form must reproduce the above copyright +// notice, this list of conditions and the following disclaimer in the +// documentation and/or other materials provided with the distribution. +// * Neither the name of Google Inc. nor the names of its contributors +// may be used to endorse or promote products derived from this software +// without specific prior written permission. +// +// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR +// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT +// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, +// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT +// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE +// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + +#include "utils/process/status.hpp" + +extern "C" { +#include <sys/wait.h> +} + +#include "utils/format/macros.hpp" +#include "utils/optional.ipp" +#include "utils/sanity.hpp" + +namespace process = utils::process; + +using utils::none; +using utils::optional; + +#if !defined(WCOREDUMP) +# define WCOREDUMP(x) false +#endif + + +/// Constructs a new status object based on the status value of waitpid(2). +/// +/// \param dead_pid_ The PID of the process this status belonged to. +/// \param stat_loc The status value returnd by waitpid(2). +process::status::status(const int dead_pid_, int stat_loc) : + _dead_pid(dead_pid_), + _exited(WIFEXITED(stat_loc) ? + optional< int >(WEXITSTATUS(stat_loc)) : none), + _signaled(WIFSIGNALED(stat_loc) ? + optional< std::pair< int, bool > >( + std::make_pair(WTERMSIG(stat_loc), WCOREDUMP(stat_loc))) : + none) +{ +} + + +/// Constructs a new status object based on fake values. +/// +/// \param exited_ If not none, specifies the exit status of the program. +/// \param signaled_ If not none, specifies the termination signal and whether +/// the process dumped core or not. +process::status::status(const optional< int >& exited_, + const optional< std::pair< int, bool > >& signaled_) : + _dead_pid(-1), + _exited(exited_), + _signaled(signaled_) +{ +} + + +/// Constructs a new status object based on a fake exit status. +/// +/// \param exitstatus_ The exit code of the process. +/// +/// \return A status object with fake data. +process::status +process::status::fake_exited(const int exitstatus_) +{ + return status(utils::make_optional(exitstatus_), none); +} + + +/// Constructs a new status object based on a fake exit status. +/// +/// \param termsig_ The termination signal of the process. +/// \param coredump_ Whether the process dumped core or not. +/// +/// \return A status object with fake data. +process::status +process::status::fake_signaled(const int termsig_, const bool coredump_) +{ + return status(none, utils::make_optional(std::make_pair(termsig_, + coredump_))); +} + + +/// Returns the PID of the process this status was taken from. +/// +/// Please note that the process is already dead and gone from the system. This +/// PID can only be used for informational reasons and not to address the +/// process in any way. +/// +/// \return The PID of the original process. +int +process::status::dead_pid(void) const +{ + return _dead_pid; +} + + +/// Returns whether the process exited cleanly or not. +/// +/// \return True if the process exited cleanly, false otherwise. +bool +process::status::exited(void) const +{ + return _exited; +} + + +/// Returns the exit code of the process. +/// +/// \pre The process must have exited cleanly (i.e. exited() must be true). +/// +/// \return The exit code. +int +process::status::exitstatus(void) const +{ + PRE(exited()); + return _exited.get(); +} + + +/// Returns whether the process terminated due to a signal or not. +/// +/// \return True if the process terminated due to a signal, false otherwise. +bool +process::status::signaled(void) const +{ + return _signaled; +} + + +/// Returns the signal that terminated the process. +/// +/// \pre The process must have terminated by a signal (i.e. signaled() must be +/// true. +/// +/// \return The signal number. +int +process::status::termsig(void) const +{ + PRE(signaled()); + return _signaled.get().first; +} + + +/// Returns whether the process core dumped or not. +/// +/// This functionality may be unsupported in some platforms. In such cases, +/// this method returns false unconditionally. +/// +/// \pre The process must have terminated by a signal (i.e. signaled() must be +/// true. +/// +/// \return True if the process dumped core, false otherwise. +bool +process::status::coredump(void) const +{ + PRE(signaled()); + return _signaled.get().second; +} + + +/// Injects the object into a stream. +/// +/// \param output The stream into which to inject the object. +/// \param status The object to format. +/// +/// \return The output stream. +std::ostream& +process::operator<<(std::ostream& output, const status& status) +{ + if (status.exited()) { + output << F("status{exitstatus=%s}") % status.exitstatus(); + } else { + INV(status.signaled()); + output << F("status{termsig=%s, coredump=%s}") % status.termsig() % + status.coredump(); + } + return output; +} |