/**
* Search for config file.
*
* @return the relative path to config file
*/
static const char* find_conf_file(void)
{
# define CONF_FILE_NAME "rhashrc"
struct rsh_stat_struct st;
char *dir1, *path;
#ifndef _WIN32 /* Linux/Unix part */
/* first check for $HOME/.rhashrc file */
if( (dir1 = getenv("HOME")) ) {
path = make_path(dir1, ".rhashrc");
if(rsh_stat(path, &st) >= 0) {
rsh_vector_add_ptr(opt.mem, path);
return (conf_opt.config_file = path);
}
free(path);
}
/* then check for global config */
if(rsh_stat( (path = "/etc/" CONF_FILE_NAME), &st) >= 0) {
return (conf_opt.config_file = path);
}
#else /* _WIN32 */
/* first check for the %APPDATA%\RHash\rhashrc config */
if( (dir1 = getenv("APPDATA")) ) {
dir1 = make_path(dir1, "RHash");
rsh_vector_add_ptr(opt.mem, path = make_path(dir1, CONF_FILE_NAME));
free(dir1);
if(rsh_stat(path, &st) >= 0) {
return (conf_opt.config_file = path);
}
}
/* then check for %HOMEDRIVE%%HOMEPATH%\rhashrc */
/* note that %USERPROFILE% is generally not a user home dir */
if( (dir1 = getenv("HOMEDRIVE")) && (path = getenv("HOMEPATH"))) {
dir1 = make_path(dir1, path);
rsh_vector_add_ptr(opt.mem, path = make_path(dir1, CONF_FILE_NAME));
free(dir1);
if(rsh_stat(path, &st) >= 0) {
return (conf_opt.config_file = path);
}
}
#endif /* _WIN32 */
return (conf_opt.config_file = NULL); /* config file not found */
}
/**
* Expand wildcards in the given filepath and store results into vector.
* If no wildcards are found then just the filepath is stored.
* Note: only wildcards in the last filename of the path are expanded.
*
* @param vect the vector to receive wide-strings with file paths
* @param filepath the filepath to process
*/
void expand_wildcards(vector_t* vect, wchar_t* filepath)
{
int added = 0;
size_t len = wcslen(filepath);
size_t index = wcscspn(filepath, L"*?");
/* if a wildcard has been found without a directory separator after it */
if(index < len && wcscspn(filepath + index, L"/\\") >= (len - index))
{
wchar_t* parent;
WIN32_FIND_DATAW d;
HANDLE h;
/* find directory separator */
for(; index > 0 && !IS_PATH_SEPARATOR(filepath[index]); index--);
parent = (IS_PATH_SEPARATOR(filepath[index]) ? filepath : 0);
h = FindFirstFileW(filepath, &d);
if(INVALID_HANDLE_VALUE != h) {
do {
wchar_t* wpath;
char* cstr;
int failed;
if((0 == wcscmp(d.cFileName, L".")) || (0 == wcscmp(d.cFileName, L".."))) continue;
if(NULL == (wpath = make_pathw(parent, index + 1, d.cFileName))) continue;
cstr = wchar_to_cstr(wpath, WIN_DEFAULT_ENCODING, &failed);
/* note: just quietly skip unconvertible file names */
if(!cstr || failed) {
free(cstr);
free(wpath);
continue;
}
rsh_vector_add_ptr(vect, cstr);
added++;
} while(FindNextFileW(h, &d));
FindClose(h);
}
}
if(added == 0) {
wchar_t* wpath = make_pathw(0, 0, filepath);
char* cstr = w2c(wpath);
if(cstr) rsh_vector_add_ptr(vect, cstr);
}
}
/**
* Find long option info, by it's name and retrieve its parameter if required.
* Error is reported for unknown options.
*
* @param option structure to receive the parsed option info
* @param parg pointer to a command line argument
*/
static void parse_long_option(parsed_option_t* option, rsh_tchar ***parg)
{
size_t length;
rsh_tchar* eq_sign;
cmdline_opt_t *t;
char* name;
#ifdef _WIN32
rsh_tchar* wname = **parg; /* "--<option name>" */
int fail = 0;
assert((**parg)[0] == L'-' && (**parg)[1] == L'-');
/* search for the '=' sign */
length = ((eq_sign = wcschr(wname, L'=')) ? (size_t)(eq_sign - wname) : wcslen(wname));
option->name = name = (char*)rsh_malloc(length + 1);
rsh_vector_add_ptr(opt.mem, name);
if(length < 30) {
size_t i = 0;
for(; i < length; i++) {
if(((unsigned)wname[i]) <= 128) name[i] = (char)wname[i];
else {
fail = 1;
break;
}
}
name[i] = '\0';
name += 2; /* skip "--" */
length -= 2;
} else fail = 1;
if(fail) fail_on_unknow_option(w2c(**parg));
#else
option->name = **parg;
name = **parg + 2; /* skip "--" */
length = ((eq_sign = strchr(name, '=')) ? (size_t)(eq_sign - name) : strlen(name));
name[length] = '\0';
#endif
/* search for the option by its name */
for(t = cmdline_opt; t->type && (strncmp(name, t->long_name, length) != 0 ||
strlen(t->long_name) != length); t++) {
}
if(!t->type) {
fail_on_unknow_option(option->name); /* report error and exit */
}
option->o = t; /* store the option found */
if(is_param_required(t->type)) {
/* store parameter without a code page conversion */
option->parameter = (eq_sign ? eq_sign + 1 : *(++(*parg)));
}
}
/**
* Process given command line option
*
* @param opts the structure to store results of option processing
* @param option option to process
*/
static void apply_option(options_t *opts, parsed_option_t* option)
{
cmdline_opt_t* o = option->o;
unsigned short option_type = o->type;
char* value = NULL;
/* check if option requires a parameter */
if(is_param_required(option_type)) {
if(!option->parameter) {
log_error(_("argument is required for option %s\n"), option->name);
rsh_exit(2);
}
#ifdef _WIN32
/* convert from UTF-16 if not a filepath */
if(option_type != F_OPTH) {
value = w2c((wchar_t*)option->parameter);
rsh_vector_add_ptr(opt.mem, value);
} else
#endif
{
value = (char*)option->parameter;
}
}
/* process option, choosing the method by type */
switch(option_type) {
case F_UFLG:
case F_UENC:
*(unsigned*)((char*)opts + ((char*)o->ptr - (char*)&opt)) |= o->param;
break;
case F_CSTR:
case F_OPTH:
/* save the option parameter */
*(char**)((char*)opts + ((char*)o->ptr - (char*)&opt)) = value;
break;
case F_PFNC:
/* call option parameter handler */
( ( void(*)(options_t *, char*, unsigned) )o->ptr )(opts, value, o->param);
break;
case F_VFNC:
( ( void(*)(options_t *) )o->ptr )(opts); /* call option handler */
break;
case F_PRNT:
log_msg("%s", (char*)o->ptr);
rsh_exit(0);
break;
default:
assert(0); /* impossible option type */
}
}
/**
* Convert the given string to lower-case then put it into
* the specified array of 'file masks'.
*
* @param arr array of file masks
* @param mask a string to add
*/
static void file_mask_add(file_mask_array* vect, const char* mask)
{
rsh_vector_add_ptr(vect, str_tolower(mask));
}
/**
* Parse command line options.
*
* @param argv program arguments
*/
void read_options(int argc, char *argv[])
{
struct parsed_cmd_line_t cmd_line;
#ifdef _WIN32
int i;
vector_t *expanded_cnames;
#endif
memset(&opt, 0, sizeof(opt));
opt.mem = rsh_vector_new_simple();
opt.find_max_depth = -1;
/* initialize cmd_line */
memset(&cmd_line, 0, sizeof(cmd_line));
rsh_blocks_vector_init(&cmd_line.options);
cmd_line.argv = argv;
cmd_line.argc = argc;
/* parse command line and apply encoding options */
parse_cmdline_options(&cmd_line);
read_config();
#ifdef _WIN32
/* set default encoding if no encoding options were specified, */
/* this should be done here, even if config file was not found. */
if( (opt.flags & OPT_ENCODING) == 0 ) opt.flags |= OPT_UTF8;
#endif
/* note: encoding and -o/-l options are already applied */
IF_WINDOWS(setup_console());
setup_output(); /* setup program output */
apply_cmdline_options(&cmd_line); /* process the rest of command options */
/* options were processed, so we don't need them anymore */
rsh_blocks_vector_destroy(&cmd_line.options);
#ifdef _WIN32
expanded_cnames = rsh_vector_new_simple();
/* convert paths to internal encoding and expand wildcards. */
for(i = 0; i < cmd_line.n_files; i++) {
wchar_t* path = cmd_line.files[i];
wchar_t* p = wcschr(path, L'\0') - 1;
/* strip trailing '\','/' symbols (if not preceded by ':') */
for(; p > path && IS_PATH_SEPARATOR_W(*p) && p[-1] != L':'; p--) *p = 0;
expand_wildcards(expanded_cnames, path);
}
opt.cmd_vec = expanded_cnames;
opt.files = (char**)expanded_cnames->array;
opt.n_files = (int)expanded_cnames->size;
free(cmd_line.files);
LocalFree(cmd_line.warg);
#else
opt.files = cmd_line.files;
opt.n_files = cmd_line.n_files;
rsh_vector_add_ptr(opt.mem, opt.files);
#endif
make_final_options_checks();
set_default_sums_flags(argv[0]); /* detect default hashes from program name */
}
/**
* Parse config file of the program.
*
* @return 0 on success, -1 on fail
*/
static int read_config(void)
{
#define LINE_BUF_SIZE 2048
char buf[LINE_BUF_SIZE];
FILE* fd;
parsed_option_t option;
int res;
/* initialize conf_opt and opt structures */
memset(&conf_opt, 0, sizeof(opt));
conf_opt.find_max_depth = -1;
if(!find_conf_file()) return 0;
fd = fopen(conf_opt.config_file, "r");
if(!fd) return -1;
while(fgets(buf, LINE_BUF_SIZE, fd)) {
size_t index;
cmdline_opt_t* t;
char* line = str_trim(buf);
char *name, *value;
if(*line == 0 || IS_COMMENT(*line)) continue;
/* search for '=' */
index = strcspn(line, "=");
if(line[index] == 0) {
log_warning(_("%s: can't parse line \"%s\"\n"), conf_opt.config_file, line);
continue;
}
line[index] = 0;
name = str_trim(line);
for(t = cmdline_opt; t->type; t++) {
if(strcmp(name, t->long_name) == 0) {
break;
}
}
if(!t->type) {
log_warning(_("%s: unknown option \"%s\"\n"), conf_opt.config_file, line);
continue;
}
value = str_trim(line + index + 1);
/* process a long option */
if(is_param_required(t->type)) {
rsh_vector_add_ptr(opt.mem, (value = rsh_strdup(value)));;
} else {
/* possible boolean values for a config file variable */
static const char* strings[] = {"1", "on", "yes", 0};
const char** cmp;
for(cmp = strings; *cmp && strcmp(value, *cmp); cmp++);
if(*cmp == 0) continue;
}
option.name = name;
option.parameter = value;
option.o = t;
apply_option(&conf_opt, &option);
}
res = fclose(fd);
#ifdef _WIN32
if( (opt.flags & OPT_ENCODING) == 0 ) opt.flags |= (conf_opt.flags & OPT_ENCODING);
#endif
return (res == 0 ? 0 : -1);
}