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-rw-r--r--tdm/backend/inifile.c255
1 files changed, 255 insertions, 0 deletions
diff --git a/tdm/backend/inifile.c b/tdm/backend/inifile.c
new file mode 100644
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+++ b/tdm/backend/inifile.c
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+/*
+
+Copyright 2003 Oswald Buddenhagen <ossi@kde.org>
+
+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( &section, 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;
+}