Add fstab(3).
This commit is contained in:
parent
360eaaf527
commit
63d42cd686
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@ -352,6 +352,12 @@ fcntl/openat.o \
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fcntl/open.o \
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fcntl/open.o \
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fsmarshall/fsm_fsbind.o \
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fsmarshall/fsm_fsbind.o \
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fsmarshall/fsm_mountat.o \
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fsmarshall/fsm_mountat.o \
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fstab/endfsent.o \
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fstab/getfsent.o \
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fstab/getfsfile.o \
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fstab/getfsspec.o \
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fstab/scanfsent.o \
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fstab/setfsent.o \
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getopt/getopt_long.o \
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getopt/getopt_long.o \
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getopt/getopt.o \
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getopt/getopt.o \
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grp/endgrent.o \
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grp/endgrent.o \
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@ -0,0 +1,34 @@
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/*******************************************************************************
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Copyright(C) Jonas 'Sortie' Termansen 2015.
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This file is part of the Sortix C Library.
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The Sortix C Library is free software: you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation, either version 3 of the License, or (at your
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option) any later version.
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The Sortix C Library is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
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License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with the Sortix C Library. If not, see <http://www.gnu.org/licenses/>.
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fstab/endfsent.cpp
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Closes the filesystem table.
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*******************************************************************************/
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#include <fstab.h>
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#include <stdio.h>
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extern "C" void endfsent(void)
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{
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if ( !__fstab_file )
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return;
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fclose(__fstab_file);
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__fstab_file = NULL;
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}
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@ -0,0 +1,48 @@
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/*******************************************************************************
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Copyright(C) Jonas 'Sortie' Termansen 2015.
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This file is part of the Sortix C Library.
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The Sortix C Library is free software: you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation, either version 3 of the License, or (at your
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option) any later version.
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The Sortix C Library is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
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License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with the Sortix C Library. If not, see <http://www.gnu.org/licenses/>.
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fstab/getfsent.cpp
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Read filesystem table entry.
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*******************************************************************************/
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#include <fstab.h>
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#include <stdio.h>
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#include <stdlib.h>
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extern "C" struct fstab* getfsent(void)
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{
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if ( !__fstab_file && !setfsent() )
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return NULL;
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static struct fstab fs;
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static char* line = NULL;
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static size_t line_size = 0;
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ssize_t line_length;
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while ( 0 <= (line_length = getline(&line, &line_size, __fstab_file)) )
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{
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if ( line_length && line[line_length - 1] == '\n' )
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line[--line_length] = '\0';
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if ( scanfsent(line, &fs) )
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return &fs;
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}
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free(line);
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line = NULL;
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line_size = 0;
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return NULL;
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}
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@ -0,0 +1,37 @@
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/*******************************************************************************
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Copyright(C) Jonas 'Sortie' Termansen 2015.
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This file is part of the Sortix C Library.
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The Sortix C Library is free software: you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation, either version 3 of the License, or (at your
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option) any later version.
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The Sortix C Library is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
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License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with the Sortix C Library. If not, see <http://www.gnu.org/licenses/>.
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fstab/getfsfile.cpp
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Lookup filesystem table by mount point.
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*******************************************************************************/
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#include <fstab.h>
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#include <string.h>
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extern "C" struct fstab* getfsfile(const char* mount_point)
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{
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if ( !setfsent() )
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return NULL;
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struct fstab* fs;
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while ( (fs = getfsent()) )
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if ( !strcmp(fs->fs_file, mount_point) )
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return fs;
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return NULL;
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}
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@ -0,0 +1,37 @@
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/*******************************************************************************
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Copyright(C) Jonas 'Sortie' Termansen 2015.
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This file is part of the Sortix C Library.
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The Sortix C Library is free software: you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation, either version 3 of the License, or (at your
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option) any later version.
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The Sortix C Library is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
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License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with the Sortix C Library. If not, see <http://www.gnu.org/licenses/>.
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fstab/getfsspec.cpp
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Lookup filesystem table by special file.
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*******************************************************************************/
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#include <fstab.h>
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#include <string.h>
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extern "C" struct fstab* getfsspec(const char* special_file)
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{
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if ( !setfsent() )
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return NULL;
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struct fstab* fs;
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while ( (fs = getfsent()) )
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if ( !strcmp(fs->fs_spec, special_file) )
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return fs;
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return NULL;
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}
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@ -0,0 +1,101 @@
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/*******************************************************************************
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Copyright(C) Jonas 'Sortie' Termansen 2015.
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This file is part of the Sortix C Library.
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The Sortix C Library is free software: you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation, either version 3 of the License, or (at your
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option) any later version.
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The Sortix C Library is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
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License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with the Sortix C Library. If not, see <http://www.gnu.org/licenses/>.
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fstab/scanfsent.cpp
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Parse filesystem table entry.
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*******************************************************************************/
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#include <ctype.h>
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#include <fstab.h>
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#include <stdlib.h>
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#include <string.h>
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static char* next_fsent_field(char** str_p)
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{
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char* str = *str_p;
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while ( *str && isspace((unsigned char) *str) )
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str++;
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if ( !*str || *str == '#' )
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return NULL;
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size_t length = 1;
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while ( str[length] &&
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!isspace((unsigned char) str[length]) &&
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str[length] != '#' )
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length++;
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if ( str[length] )
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{
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char c = str[length];
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str[length] = '\0';
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*str_p = str + length + (c != '#' ? 1 : 0);
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}
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else
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*str_p = str + length;
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return str;
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}
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char* find_fstype(char* str)
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{
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const char* types[] =
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{
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FSTAB_RO,
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FSTAB_RQ,
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FSTAB_RW,
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FSTAB_SW,
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FSTAB_XX,
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};
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size_t count = sizeof(types) / sizeof(types[0]);
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while ( *str )
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{
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while ( *str == ',' )
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{
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str++;
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continue;
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}
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size_t length = strcspn(str, ",");
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if ( length == 2 )
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{
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for ( size_t i = 0; i < count; i++ )
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if ( str[0] == types[i][0] && str[1] == types[i][1] )
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return (char*) types[i];
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}
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str += length;
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}
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return NULL;
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}
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extern "C" int scanfsent(char* str, struct fstab* fs)
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{
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char* str_freq;
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char* str_passno;
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if ( !(fs->fs_spec = next_fsent_field(&str)) ||
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!(fs->fs_file = next_fsent_field(&str)) ||
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!(fs->fs_vfstype = next_fsent_field(&str)) ||
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!(fs->fs_mntops = next_fsent_field(&str)) ||
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!(str_freq = next_fsent_field(&str)) ||
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!(str_passno = next_fsent_field(&str)) )
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return 0;
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if ( !(fs->fs_type = find_fstype(fs->fs_mntops)) )
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return 0;
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if ( !strcmp(fs->fs_type, "xx") )
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return 0;
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fs->fs_freq = atoi(str_freq);
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fs->fs_passno = atoi(str_passno);
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return 1;
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}
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@ -0,0 +1,37 @@
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/*******************************************************************************
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Copyright(C) Jonas 'Sortie' Termansen 2015.
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This file is part of the Sortix C Library.
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The Sortix C Library is free software: you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation, either version 3 of the License, or (at your
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option) any later version.
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The Sortix C Library is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
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License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with the Sortix C Library. If not, see <http://www.gnu.org/licenses/>.
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fstab/setfsent.cpp
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Open filesystem table.
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*******************************************************************************/
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#include <fstab.h>
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#include <stdio.h>
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extern "C" { FILE* __fstab_file = NULL; }
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extern "C" int setfsent(void)
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{
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if ( __fstab_file )
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rewind(__fstab_file);
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else if ( !(__fstab_file = fopen("/etc/fstab", "r")) )
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return 0;
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return 1;
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}
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@ -0,0 +1,71 @@
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/*******************************************************************************
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Copyright(C) Jonas 'Sortie' Termansen 2015.
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This file is part of the Sortix C Library.
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The Sortix C Library is free software: you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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||||||
|
the Free Software Foundation, either version 3 of the License, or (at your
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option) any later version.
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The Sortix C Library is distributed in the hope that it will be useful, but
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|
WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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||||||
|
or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
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||||||
|
License for more details.
|
||||||
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|
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|
You should have received a copy of the GNU Lesser General Public License
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|
along with the Sortix C Library. If not, see <http://www.gnu.org/licenses/>.
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fstab.h
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Filesystem table.
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*******************************************************************************/
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#ifndef INCLUDE_FSTAB_H
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#define INCLUDE_FSTAB_H
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#include <sys/cdefs.h>
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#ifndef __FILE_defined
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#define __FILE_defined
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typedef struct __FILE FILE;
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#endif
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struct fstab
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{
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char* fs_spec;
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char* fs_file;
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char* fs_vfstype;
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char* fs_mntops;
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char* fs_type;
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int fs_freq;
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int fs_passno;
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};
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#define FSTAB_RO "ro"
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#define FSTAB_RQ "rq"
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#define FSTAB_RW "rw"
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#define FSTAB_SW "sw"
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#define FSTAB_XX "xx"
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#ifdef __cplusplus
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extern "C" {
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#endif
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#if defined(__is_sortix_libc)
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extern FILE* __fstab_file;
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#endif
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void endfsent(void);
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struct fstab* getfsent(void);
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struct fstab* getfsfile(const char*);
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struct fstab* getfsspec(const char*);
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int scanfsent(char*, struct fstab*);
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int setfsent(void);
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#ifdef __cplusplus
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} /* extern "C" */
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#endif
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#endif
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