diff options
Diffstat (limited to 'kdm/backend/inifile.c')
| -rw-r--r-- | kdm/backend/inifile.c | 255 |
1 files changed, 255 insertions, 0 deletions
diff --git a/kdm/backend/inifile.c b/kdm/backend/inifile.c new file mode 100644 index 000000000..b5426de75 --- /dev/null +++ b/kdm/backend/inifile.c @@ -0,0 +1,255 @@ +/* + +Copyright 2003 Oswald Buddenhagen <[email protected]> + +Permission to use, copy, modify, distribute, and sell this software and its +documentation for any purpose is hereby granted without fee, provided that +the above copyright notice appear in all copies and that both that +copyright notice and this permission notice appear in supporting +documentation. + +The above copyright notice and this permission notice shall be included +in all copies or substantial portions of the Software. + +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS +OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF +MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. +IN NO EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR +OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, +ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR +OTHER DEALINGS IN THE SOFTWARE. + +Except as contained in this notice, the name of a copyright holder shall +not be used in advertising or otherwise to promote the sale, use or +other dealings in this Software without prior written authorization +from the copyright holder. + +*/ + +/* + * xdm - display manager daemon + * Author: Keith Packard, MIT X Consortium + * + * load, save and manipulate ini-style config files + */ + +#include "dm.h" +#include "dm_error.h" + +#include <sys/types.h> +#include <sys/stat.h> +#include <unistd.h> +#include <stdlib.h> +#include <string.h> +#include <fcntl.h> + +char * +iniLoad( const char *fname ) +{ + char *data; + int fd, len; + struct stat st; + + if ((fd = open( fname, O_RDONLY | O_NONBLOCK )) < 0) { + Debug( "cannot open ini-file %\"s: %m", fname ); + return 0; + } + if (fstat( fd, &st ) || !S_ISREG( st.st_mode )) { + LogWarn( "Ini-file %\"s is no regular file\n", fname ); + close( fd ); + return 0; + } + if (st.st_size >= 0x10000) { + LogWarn( "Ini-file %\"s is too big\n", fname ); + close( fd ); + return 0; + } + len = st.st_size; + if (!(data = Malloc( len + 2 ))) { + close( fd ); + return 0; + } + if (read( fd, data, len ) != len) { + Debug( "cannot read ini-file %\"s: %m", fname ); + free( data ); + close( fd ); + return 0; + } + close( fd ); + if (data[len - 1] != '\n') + data[len++] = '\n'; + data[len] = 0; + return data; +} + +int +iniSave( const char *data, const char *fname ) +{ + int fd, cnt, len; + + if ((fd = open( fname, O_WRONLY | O_CREAT | O_TRUNC | O_NONBLOCK, 0600 )) < 0) { + Debug( "cannot create ini-file %\"s: %m", fname ); + return 0; + } + len = strlen( data ); + if ((cnt = write( fd, data, len )) == len) { + close( fd ); + return 1; + } + if (cnt == -1) + Debug( "cannot write ini-file %\"s: %m", fname ); + else + Debug( "cannot write ini-file %\"s: partial write", fname ); + close( fd ); + return 0; +} + +#define apparr(d,s,n) do { memcpy (d, s, n); d += n; } while(0) +#define appbyte(d,b) *d++ = b + +char * +iniEntry( char *data, const char *section, const char *key, const char *value ) +{ + char *p = data, *secinsert = 0, *pastinsert = 0, *cb, *ce, *ndata; + const char *t; + int insect = 0, ll, sl, kl, vl, len, nlen; + + if (p) { + while (*p) { + for (; *p == ' ' || *p == '\t'; p++); + if (*p == '\n') { + p++; + continue; + } + if (*p == '[') { + for (t = section; *++p == *t; t++); + insect = !*t && *p == ']'; + } else if (insect) { + for (t = key; *p == *t; t++, p++); + for (; *p == ' ' || *p == '\t'; p++); + if (!*t && *p == '=') { + for (p++; *p == ' ' || *p == '\t'; p++); + cb = p; + while (*p++ != '\n'); + ce = p; + if (value) { + ll = sl = kl = 0; + len = (ce - data) + strlen( ce ); + goto insert; + } else { + for (ce--; ce != cb && (*(ce - 1) == ' ' || *(ce - 1) == '\t'); ce--); + if (!StrNDup( &p, cb, ce - cb )) + return 0; + return p; + } + } + } + for (; *p != '\n'; p++); + p++; + if (insect) + secinsert = p; + else + pastinsert = p; + } + } + if (!value) + return 0; + len = p - data; + if (secinsert) { + ce = cb = secinsert; + sl = ll = 0; + } else { + sl = strlen( section ) + 3; + if (pastinsert) { + ce = cb = pastinsert; + ll = 1; + } else { + ce = cb = data; + ll = 0; + } + } + kl = strlen( key ) + 1; + insert: + vl = strlen( value ); + nlen = len - (ce - cb) + ll + sl + kl + vl + 1; + if (!(p = ndata = Malloc( nlen + 1 ))) + return data; + apparr( p, data, cb - data ); + if (kl) { + if (sl) { + if (ll) + appbyte( p, '\n' ); + appbyte( p, '[' ); + apparr( p, section, sl - 3 ); + appbyte( p, ']' ); + appbyte( p, '\n' ); + } + apparr( p, key, kl - 1 ); + appbyte( p, '=' ); + } + apparr( p, value, vl ); + appbyte( p, '\n' ); + if (data) { + apparr( p, ce, len - (ce - data) ); + free( data ); + } + appbyte( p, 0 ); + return ndata; +} + +char * +iniMerge( char *data, const char *newdata ) +{ + const char *p, *cb, *ce; + char *section = 0, *key, *value; + + if (!newdata) + return data; + for (p = newdata;;) { + for (; *p == ' ' || *p == '\t'; p++); + if (!*p) + break; + if (*p == '\n') { + p++; + continue; + } + if (*p == '#') { + for (p++; *p != '\n'; p++) + if (!*p) + goto bail; + p++; + continue; + } + if (*p == '[') { + cb = ++p; + for (; *p != ']'; p++) + if (!*p || *p == '\n') /* missing ] */ + goto bail; + if (!ReStrN( §ion, cb, p - cb )) + break; + p++; + } else { + cb = p; + for (; *p != '='; p++) + if (!*p || *p == '\n') /* missing = */ + goto bail; + for (ce = p; ce != cb && (*(ce - 1) == ' ' || *(ce - 1) == '\t'); ce--); + if (!StrNDup( &key, cb, ce - cb )) + break; + for (p++; *p == ' ' || *p == '\t'; p++); + cb = p; + for (; *p && *p != '\n'; p++); + for (ce = p; ce != cb && (*(ce - 1) == ' ' || *(ce - 1) == '\t'); ce--); + if (!StrNDup( &value, cb, ce - cb )) + break; + if (section) + data = iniEntry( data, section, key, value ); + free( value ); + free( key ); + } + } + bail: + if (section) + free( section ); + return data; +} |