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/*
* common - common nodm definitions and utility functions
*
* Copyright 2011 Enrico Zini <enrico@enricozini.org>
*
* 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 2 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, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#ifndef NODM_DEFS_H
#define NODM_DEFS_H
#include <sys/types.h>
// Exit codes used by shadow programs
#define E_SUCCESS 0 ///< success
#define E_NOPERM 1 ///< permission denied
#define E_USAGE 2 ///< invalid command syntax
#define E_BAD_ARG 3 ///< invalid argument to option
#define E_PASSWD_NOTFOUND 14 ///< not found password file
#define E_SHADOW_NOTFOUND 15 ///< not found shadow password file
#define E_GROUP_NOTFOUND 16 ///< not found group file
#define E_GSHADOW_NOTFOUND 17 ///< not found shadow group file
#define E_CMD_NOEXEC 126 ///< can't run command/shell
#define E_CMD_NOTFOUND 127 ///< can't find command/shell to run
// Other nodm-specific exit codes
#define E_PROGRAMMING 200 ///< Programming error
#define E_PAM_ERROR 201 ///< something wrong talking with PAM
#define E_OS_ERROR 202 ///< something wrong talking with the Operating System
#define E_XLIB_ERROR 203 ///< Xlib error
#define E_VT_ALLOC_ERROR 204 ///< VT allocation error
#define E_X_SERVER_DIED 210 ///< Server died
#define E_X_SERVER_TIMEOUT 211 ///< Server not ready before timeout
#define E_X_SERVER_CONNECT 212 ///< Could not connect to X server
#define E_SESSION_DIED 220 ///< X session died
#define E_USER_QUIT 221 ///< Quit requested
/// Return the basename of a path, as a pointer inside \a str
const char* nodm_basename (const char* str);
/**
* Like getenv, but if the variable is not defined it returns \a def
*/
const char* getenv_with_default(const char* envname, const char* def);
/**
* Like strcpy but:
*
* * it works only for sized character arrays (it expects sizeof on them)
* * it always null-terminates the destination string
* * it returns false if the string was truncated, else true
*/
#define bounded_strcpy(dst, src) (snprintf(dst, sizeof(dst), "%s", (src)) < sizeof(dst))
/// Return the string description of an exit code
const char* nodm_strerror(int code);
/**
* Check if a child has died.
*
* @param pid
* process ID to check
* @retval quit
* 0 if it is still running
* 1 if it has just quit and we got its exit status
* 2 if the pid does not exist
* @retval status
* the exit status if it has quit
*/
int child_has_quit(pid_t pid, int* quit, int* status);
/**
* Kill a child process if it still running and wait for it to end
*
* @param pid
* The child pid
* @param procdesc
* Child process description to use in the logs
*/
int child_must_exit(pid_t pid, const char* procdesc);
#endif
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