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Diffstat (limited to 'src/knot/common/process.h')
-rw-r--r-- | src/knot/common/process.h | 60 |
1 files changed, 60 insertions, 0 deletions
diff --git a/src/knot/common/process.h b/src/knot/common/process.h new file mode 100644 index 0000000..38bf942 --- /dev/null +++ b/src/knot/common/process.h @@ -0,0 +1,60 @@ +/* Copyright (C) 2017 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz> + + This program is free software: you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation, either version 3 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program. If not, see <https://www.gnu.org/licenses/>. + */ + +/*! + * \brief Functions for POSIX process handling. + */ + +#pragma once + +#include <stdbool.h> +#include <unistd.h> + +/*! + * \brief Check if PID file exists and create it if possible. + * + * \retval NULL if failed. + * \retval Created PID file path. + */ +char *pid_check_and_create(void); + +/*! + * \brief Remove PID file. + * + * \warning PID file content won't be checked. + */ +void pid_cleanup(void); + +/*! + * \brief Return true if the PID is running. + * + * \param pid Process ID. + * + * \retval 1 if running. + * \retval 0 if not running (or error). + */ +bool pid_running(pid_t pid); + +/*! + * \brief Update process privileges to new UID/GID. + * + * \param uid New user ID. + * \param gid New group ID. + * + * \retval KNOT_EOK on success. + * \retval KNOT_ERROR if UID or GID change failed. + */ +int proc_update_privileges(int uid, int gid); |