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Diffstat (limited to 'lib/readutmp.h')
| -rw-r--r-- | lib/readutmp.h | 223 |
1 files changed, 223 insertions, 0 deletions
diff --git a/lib/readutmp.h b/lib/readutmp.h new file mode 100644 index 0000000..cb83f8e --- /dev/null +++ b/lib/readutmp.h @@ -0,0 +1,223 @@ +/* Declarations for GNU's read utmp module. + + Copyright (C) 1992-2007, 2009-2022 Free Software Foundation, Inc. + + 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/>. */ + +/* Written by jla; revised by djm */ + +#ifndef __READUTMP_H__ +# define __READUTMP_H__ + +# include <stdlib.h> +# include <sys/types.h> + +/* AIX 4.3.3 has both utmp.h and utmpx.h, but only struct utmp + has the ut_exit member. */ +# if (HAVE_UTMPX_H && HAVE_UTMP_H && HAVE_STRUCT_UTMP_UT_EXIT \ + && ! HAVE_STRUCT_UTMPX_UT_EXIT) +# undef HAVE_UTMPX_H +# endif + +# if HAVE_UTMPX_H +# if HAVE_UTMP_H + /* HPUX 10.20 needs utmp.h, for the definition of e.g., UTMP_FILE. */ +# include <utmp.h> +# endif +# if defined _THREAD_SAFE && defined UTMP_DATA_INIT + /* When including both utmp.h and utmpx.h on AIX 4.3, with _THREAD_SAFE + defined, work around the duplicate struct utmp_data declaration. */ +# define utmp_data gl_aix_4_3_workaround_utmp_data +# endif +# include <utmpx.h> +# define UTMP_STRUCT_NAME utmpx +# define UT_TIME_MEMBER(UT_PTR) ((UT_PTR)->ut_tv.tv_sec) +# define SET_UTMP_ENT setutxent +# define GET_UTMP_ENT getutxent +# define END_UTMP_ENT endutxent +# ifdef HAVE_UTMPXNAME +# define UTMP_NAME_FUNCTION utmpxname +# elif defined UTXDB_ACTIVE +# define UTMP_NAME_FUNCTION(x) setutxdb (UTXDB_ACTIVE, x) +# endif + +# if HAVE_STRUCT_UTMPX_UT_EXIT_E_TERMINATION +# define UT_EXIT_E_TERMINATION(U) ((U)->ut_exit.e_termination) +# else +# if HAVE_STRUCT_UTMPX_UT_EXIT_UT_TERMINATION +# define UT_EXIT_E_TERMINATION(U) ((U)->ut_exit.ut_termination) +# else +# define UT_EXIT_E_TERMINATION(U) 0 +# endif +# endif + +# if HAVE_STRUCT_UTMPX_UT_EXIT_E_EXIT +# define UT_EXIT_E_EXIT(U) ((U)->ut_exit.e_exit) +# else +# if HAVE_STRUCT_UTMPX_UT_EXIT_UT_EXIT +# define UT_EXIT_E_EXIT(U) ((U)->ut_exit.ut_exit) +# else +# define UT_EXIT_E_EXIT(U) 0 +# endif +# endif + +# elif HAVE_UTMP_H + +# include <utmp.h> +# if !HAVE_DECL_GETUTENT + struct utmp *getutent (void); +# endif +# define UTMP_STRUCT_NAME utmp +# define UT_TIME_MEMBER(UT_PTR) ((UT_PTR)->ut_time) +# define SET_UTMP_ENT setutent +# define GET_UTMP_ENT getutent +# define END_UTMP_ENT endutent +# ifdef HAVE_UTMPNAME +# define UTMP_NAME_FUNCTION utmpname +# endif + +# if HAVE_STRUCT_UTMP_UT_EXIT_E_TERMINATION +# define UT_EXIT_E_TERMINATION(U) ((U)->ut_exit.e_termination) +# else +# if HAVE_STRUCT_UTMP_UT_EXIT_UT_TERMINATION +# define UT_EXIT_E_TERMINATION(U) ((U)->ut_exit.ut_termination) +# else +# define UT_EXIT_E_TERMINATION(U) 0 +# endif +# endif + +# if HAVE_STRUCT_UTMP_UT_EXIT_E_EXIT +# define UT_EXIT_E_EXIT(U) ((U)->ut_exit.e_exit) +# else +# if HAVE_STRUCT_UTMP_UT_EXIT_UT_EXIT +# define UT_EXIT_E_EXIT(U) ((U)->ut_exit.ut_exit) +# else +# define UT_EXIT_E_EXIT(U) 0 +# endif +# endif + +# endif + +/* Accessor macro for the member named ut_user or ut_name. */ +# if HAVE_UTMPX_H + +# if HAVE_STRUCT_UTMPX_UT_USER +# define UT_USER(Utmp) ((Utmp)->ut_user) +# endif +# if HAVE_STRUCT_UTMPX_UT_NAME +# undef UT_USER +# define UT_USER(Utmp) ((Utmp)->ut_name) +# endif + +# elif HAVE_UTMP_H + +# if HAVE_STRUCT_UTMP_UT_USER +# define UT_USER(Utmp) ((Utmp)->ut_user) +# endif +# if HAVE_STRUCT_UTMP_UT_NAME +# undef UT_USER +# define UT_USER(Utmp) ((Utmp)->ut_name) +# endif + +# endif + +# define HAVE_STRUCT_XTMP_UT_EXIT \ + (HAVE_STRUCT_UTMP_UT_EXIT \ + || HAVE_STRUCT_UTMPX_UT_EXIT) + +# define HAVE_STRUCT_XTMP_UT_ID \ + (HAVE_STRUCT_UTMP_UT_ID \ + || HAVE_STRUCT_UTMPX_UT_ID) + +# define HAVE_STRUCT_XTMP_UT_PID \ + (HAVE_STRUCT_UTMP_UT_PID \ + || HAVE_STRUCT_UTMPX_UT_PID) + +typedef struct UTMP_STRUCT_NAME STRUCT_UTMP; + +enum { UT_USER_SIZE = sizeof UT_USER ((STRUCT_UTMP *) 0) }; + +# if !defined UTMP_FILE && defined _PATH_UTMP +# define UTMP_FILE _PATH_UTMP +# endif + +# if !defined WTMP_FILE && defined _PATH_WTMP +# define WTMP_FILE _PATH_WTMP +# endif + +# ifdef UTMPX_FILE /* Solaris, SysVr4 */ +# undef UTMP_FILE +# define UTMP_FILE UTMPX_FILE +# endif + +# ifdef WTMPX_FILE /* Solaris, SysVr4 */ +# undef WTMP_FILE +# define WTMP_FILE WTMPX_FILE +# endif + +# ifndef UTMP_FILE +# define UTMP_FILE "/etc/utmp" +# endif + +# ifndef WTMP_FILE +# define WTMP_FILE "/etc/wtmp" +# endif + +# if HAVE_STRUCT_XTMP_UT_PID +# define UT_PID(U) ((U)->ut_pid) +# else +# define UT_PID(U) 0 +# endif + +# if HAVE_STRUCT_UTMP_UT_TYPE || HAVE_STRUCT_UTMPX_UT_TYPE +# define UT_TYPE_EQ(U, V) ((U)->ut_type == (V)) +# define UT_TYPE_NOT_DEFINED 0 +# else +# define UT_TYPE_EQ(U, V) 0 +# define UT_TYPE_NOT_DEFINED 1 +# endif + +# ifdef BOOT_TIME +# define UT_TYPE_BOOT_TIME(U) UT_TYPE_EQ (U, BOOT_TIME) +# else +# define UT_TYPE_BOOT_TIME(U) 0 +# endif + +# ifdef USER_PROCESS +# define UT_TYPE_USER_PROCESS(U) UT_TYPE_EQ (U, USER_PROCESS) +# else +# define UT_TYPE_USER_PROCESS(U) 0 +# endif + +# define IS_USER_PROCESS(U) \ + (UT_USER (U)[0] \ + && (UT_TYPE_USER_PROCESS (U) \ + || (UT_TYPE_NOT_DEFINED && UT_TIME_MEMBER (U) != 0))) + +/* Options for read_utmp. */ +enum + { + READ_UTMP_CHECK_PIDS = 1, + READ_UTMP_USER_PROCESS = 2 + }; + +char *extract_trimmed_name (const STRUCT_UTMP *ut) + _GL_ATTRIBUTE_MALLOC _GL_ATTRIBUTE_DEALLOC_FREE + _GL_ATTRIBUTE_RETURNS_NONNULL; + +/* FIXME: This header should use idx_t, not size_t. */ +int read_utmp (char const *file, size_t *n_entries, STRUCT_UTMP **utmp_buf, + int options); + +#endif /* __READUTMP_H__ */ |