Sweden-Number/programs/regedit/regedit.c

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/*
* Windows regedit.exe registry editor implementation.
*
* Copyright 2002 Andriy Palamarchuk
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
*/
#include <ctype.h>
#include <stdio.h>
#include <windows.h>
#include "regproc.h"
static const char *usage =
"Usage:\n"
" regedit filename\n"
" regedit /E filename [regpath]\n"
" regedit /D regpath\n"
"\n"
"filename - registry file name\n"
"regpath - name of the registry key\n"
"\n"
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"When called without any switches, adds the content of the specified\n"
"file to the registry\n"
"\n"
"Switches:\n"
" /E - exports contents of the specified registry key to the specified\n"
" file. Exports the whole registry if no key is specified.\n"
" /D - deletes specified registry key\n"
" /S - silent execution, can be used with any other switch.\n"
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" Default. The only existing mode, exists for compatibility with Windows regedit.\n"
" /V - advanced mode, can be used with any other switch.\n"
" Ignored, exists for compatibility with Windows regedit.\n"
" /L - location of system.dat file. Can be used with any other switch.\n"
" Ignored. Exists for compatibility with Windows regedit.\n"
" /R - location of user.dat file. Can be used with any other switch.\n"
" Ignored. Exists for compatibility with Windows regedit.\n"
" /? - print this help. Any other switches are ignored.\n"
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" /C - create registry from file. Not implemented.\n"
"\n"
"The switches are case-insensitive, can be prefixed either by '-' or '/'.\n"
"This program is command-line compatible with Microsoft Windows\n"
"regedit.\n";
typedef enum {
ACTION_UNDEF, ACTION_ADD, ACTION_EXPORT, ACTION_DELETE
} REGEDIT_ACTION;
const CHAR *getAppName(void)
{
return "regedit";
}
/******************************************************************************
* Copies file name from command line string to the buffer.
* Rewinds the command line string pointer to the next non-space character
* after the file name.
* Buffer contains an empty string if no filename was found;
*
* params:
* command_line - command line current position pointer
* where *s[0] is the first symbol of the file name.
* file_name - buffer to write the file name to.
*/
static void get_file_name(CHAR **command_line, CHAR *file_name)
{
CHAR *s = *command_line;
int pos = 0; /* position of pointer "s" in *command_line */
file_name[0] = 0;
if (!s[0]) {
return;
}
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if (s[0] == '"') {
s++;
(*command_line)++;
while(s[0] != '"') {
if (!s[0]) {
fprintf(stderr,"%s: Unexpected end of file name!\n",
getAppName());
exit(1);
}
s++;
pos++;
}
} else {
while(s[0] && !isspace(s[0])) {
s++;
pos++;
}
}
memcpy(file_name, *command_line, pos * sizeof((*command_line)[0]));
/* remove the last backslash */
if (file_name[pos - 1] == '\\') {
file_name[pos - 1] = '\0';
} else {
file_name[pos] = '\0';
}
if (s[0]) {
s++;
pos++;
}
while(s[0] && isspace(s[0])) {
s++;
pos++;
}
(*command_line) += pos;
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}
static BOOL PerformRegAction(REGEDIT_ACTION action, LPSTR s)
{
switch (action) {
case ACTION_ADD: {
CHAR filename[MAX_PATH];
FILE *reg_file;
get_file_name(&s, filename);
if (!filename[0]) {
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fprintf(stderr,"%s: No file name was specified\n", getAppName());
fprintf(stderr,usage);
exit(1);
}
while(filename[0]) {
char* realname = NULL;
int size;
size=SearchPath(NULL,filename,NULL,0,NULL,NULL);
if (size>0)
{
realname=HeapAlloc(GetProcessHeap(),0,size);
size=SearchPath(NULL,filename,NULL,size,realname,NULL);
}
if (size==0)
{
fprintf(stderr,"%s: File not found \"%s\" (%d)\n",
getAppName(),filename,GetLastError());
exit(1);
}
reg_file = fopen(realname, "r");
if (reg_file==NULL)
{
perror("");
fprintf(stderr,"%s: Can't open file \"%s\"\n", getAppName(), filename);
exit(1);
}
processRegLines(reg_file);
if (realname)
{
HeapFree(GetProcessHeap(),0,realname);
fclose(reg_file);
}
get_file_name(&s, filename);
}
break;
}
case ACTION_DELETE: {
CHAR reg_key_name[KEY_MAX_LEN];
get_file_name(&s, reg_key_name);
if (!reg_key_name[0]) {
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fprintf(stderr,"%s: No registry key was specified for removal\n",
getAppName());
fprintf(stderr,usage);
exit(1);
}
delete_registry_key(reg_key_name);
break;
}
case ACTION_EXPORT: {
CHAR filename[MAX_PATH];
filename[0] = '\0';
get_file_name(&s, filename);
if (!filename[0]) {
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fprintf(stderr,"%s: No file name was specified\n", getAppName());
fprintf(stderr,usage);
exit(1);
}
if (s[0]) {
CHAR reg_key_name[KEY_MAX_LEN];
get_file_name(&s, reg_key_name);
export_registry_key(filename, reg_key_name);
} else {
export_registry_key(filename, NULL);
}
break;
}
default:
fprintf(stderr,"%s: Unhandled action!\n", getAppName());
exit(1);
break;
}
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return TRUE;
}
/**
* Process unknown switch.
*
* Params:
* chu - the switch character in upper-case.
* s - the command line string where s points to the switch character.
*/
static void error_unknown_switch(char chu, char *s)
{
if (isalpha(chu)) {
fprintf(stderr,"%s: Undefined switch /%c!\n", getAppName(), chu);
} else {
fprintf(stderr,"%s: Alphabetic character is expected after '%c' "
"in switch specification\n", getAppName(), *(s - 1));
}
exit(1);
}
BOOL ProcessCmdLine(LPSTR lpCmdLine)
{
REGEDIT_ACTION action = ACTION_UNDEF;
LPSTR s = lpCmdLine; /* command line pointer */
CHAR ch = *s; /* current character */
while (ch && ((ch == '-') || (ch == '/'))) {
char chu;
char ch2;
s++;
ch = *s;
ch2 = *(s+1);
chu = toupper(ch);
if (!ch2 || isspace(ch2)) {
if (chu == 'S' || chu == 'V') {
/* ignore these switches */
} else {
switch (chu) {
case 'D':
action = ACTION_DELETE;
break;
case 'E':
action = ACTION_EXPORT;
break;
case '?':
fprintf(stderr,usage);
exit(0);
break;
default:
error_unknown_switch(chu, s);
break;
}
}
s++;
} else {
if (ch2 == ':') {
switch (chu) {
case 'L':
/* fall through */
case 'R':
s += 2;
while (*s && !isspace(*s)) {
s++;
}
break;
default:
error_unknown_switch(chu, s);
break;
}
} else {
/* this is a file name, starting from '/' */
s--;
break;
}
}
/* skip spaces to the next parameter */
ch = *s;
while (ch && isspace(ch)) {
s++;
ch = *s;
}
}
if (*s && action == ACTION_UNDEF)
action = ACTION_ADD;
if (action == ACTION_UNDEF)
return FALSE;
return PerformRegAction(action, s);
}