97 lines
2.4 KiB
C
97 lines
2.4 KiB
C
/*
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* Copyright (c) 2015 Jonas 'Sortie' Termansen.
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*
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* fstab/scanfsent.c
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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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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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