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#include "owl.h"
#include <pwd.h>
#include <sys/stat.h>
#include <stdarg.h>
#include <glib/gstdio.h>
#include <glib-object.h>
const char *skiptokens(const char *buff, int n) {
/* skips n tokens and returns where that would be. */
char quote = 0;
while (*buff && n>0) {
while (*buff == ' ') buff++;
while (*buff && (quote || *buff != ' ')) {
if(quote) {
if(*buff == quote) quote = 0;
} else if(*buff == '"' || *buff == '\'') {
quote = *buff;
}
buff++;
}
while (*buff == ' ') buff++;
n--;
}
return buff;
}
CALLER_OWN char *owl_util_homedir_for_user(const char *name)
{
int err;
struct passwd pw_buf;
struct passwd *pw;
char *pw_strbuf, *ret;
long pw_strbuf_len = sysconf(_SC_GETPW_R_SIZE_MAX);
if (pw_strbuf_len < 0) {
/* If we really hate ourselves, we can be fancy and loop until we stop
* getting ERANGE. For now just pick a random number. */
owl_function_error("owl_util_homedir_for_user: Could not get _SC_GETPW_R_SIZE_MAX");
pw_strbuf_len = 16384;
}
pw_strbuf = g_new0(char, pw_strbuf_len);
err = getpwnam_r(name, &pw_buf, pw_strbuf, pw_strbuf_len, &pw);
if (err) {
owl_function_error("getpwuid_r: %s", strerror(err));
/* Fall through; pw will be NULL. */
}
ret = pw ? g_strdup(pw->pw_dir) : NULL;
g_free(pw_strbuf);
return ret;
}
/* Return a "nice" version of the path. Tilde expansion is done, and
* duplicate slashes are removed. Caller must free the return.
*/
CALLER_OWN char *owl_util_makepath(const char *in)
{
char *out;
int i, j;
if (in[0] == '~') {
/* Attempt tilde-expansion of the first component. Get the
tilde-prefix, which goes up to the next slash. */
const char *end = strchr(in + 1, '/');
if (end == NULL)
end = in + strlen(in);
/* Patch together a new path. Replace the ~ and tilde-prefix with
the homedir, if available. */
if (end == in + 1) {
/* My home directory. Use the one in owl_global for consistency with
* owl_zephyr_dotfile. */
out = g_strconcat(owl_global_get_homedir(&g), end, NULL);
} else {
/* Someone else's home directory. */
char *user = g_strndup(in + 1, end - (in + 1));
char *home = owl_util_homedir_for_user(user);
if (home) {
out = g_strconcat(home, end, NULL);
} else {
out = g_strdup(in);
}
g_free(home);
g_free(user);
}
} else {
out = g_strdup(in);
}
/* And a quick pass to remove duplicate slashes. */
for (i = j = 0; out[i] != '\0'; i++) {
if (out[i] != '/' || i == 0 || out[i-1] != '/')
out[j++] = out[i];
}
out[j] = '\0';
return out;
}
void owl_ptr_array_free(GPtrArray *array, GDestroyNotify element_free_func)
{
/* TODO: when we move to requiring glib 2.22+, use
* g_ptr_array_new_with_free_func instead. */
if (element_free_func)
g_ptr_array_foreach(array, (GFunc)element_free_func, NULL);
g_ptr_array_free(array, true);
}
/* Break a command line up into argv, argc. The caller must free
the returned values with g_strfreev. If there is an error argc will be set
to -1, argv will be NULL and the caller does not need to free anything. The
returned vector is NULL-terminated. */
CALLER_OWN char **owl_parseline(const char *line, int *argc)
{
GPtrArray *argv;
int i, len, between=1;
GString *curarg;
char quote;
argv = g_ptr_array_new();
len=strlen(line);
curarg = g_string_new("");
quote='\0';
if (argc) *argc=0;
for (i=0; i<len+1; i++) {
/* find the first real character */
if (between) {
if (line[i]==' ' || line[i]=='\t' || line[i]=='\0') {
continue;
} else {
between=0;
i--;
continue;
}
}
/* deal with a quote character */
if (line[i]=='"' || line[i]=="'"[0]) {
/* if this type of quote is open, close it */
if (quote==line[i]) {
quote='\0';
continue;
}
/* if no quoting is open then open with this */
if (quote=='\0') {
quote=line[i];
continue;
}
/* if another type of quote is open then treat this as a literal */
g_string_append_c(curarg, line[i]);
continue;
}
/* if it's not a space or end of command, then use it */
if (line[i]!=' ' && line[i]!='\t' && line[i]!='\n' && line[i]!='\0') {
g_string_append_c(curarg, line[i]);
continue;
}
/* otherwise, if we're not in quotes, add the whole argument */
if (quote=='\0') {
/* add the argument */
g_ptr_array_add(argv, g_string_free(curarg, false));
curarg = g_string_new("");
between=1;
continue;
}
/* if it is a space and we're in quotes, then use it */
g_string_append_c(curarg, line[i]);
}
if (argc) *argc = argv->len;
g_ptr_array_add(argv, NULL);
g_string_free(curarg, true);
/* check for unbalanced quotes */
if (quote!='\0') {
owl_ptr_array_free(argv, g_free);
if (argc) *argc = -1;
return(NULL);
}
return (char**)g_ptr_array_free(argv, false);
}
/* Appends a quoted version of arg suitable for placing in a
* command-line to a GString. Does not append a space. */
void owl_string_append_quoted_arg(GString *buf, const char *arg)
{
const char *argp;
if (arg[0] == '\0') {
/* Quote the empty string. */
g_string_append(buf, "''");
} else if (arg[strcspn(arg, "'\" \n\t")] == '\0') {
/* If there are no nasty characters, return as-is. */
g_string_append(buf, arg);
} else if (!strchr(arg, '\'')) {
/* Single-quote if possible. */
g_string_append_c(buf, '\'');
g_string_append(buf, arg);
g_string_append_c(buf, '\'');
} else {
/* Nasty case: double-quote, but change all internal "s to "'"'"
* so that they are single-quoted because we're too cool for
* backslashes.
*/
g_string_append_c(buf, '"');
for (argp = arg; *argp; argp++) {
if (*argp == '"')
g_string_append(buf, "\"'\"'\"");
else
g_string_append_c(buf, *argp);
}
g_string_append_c(buf, '"');
}
}
/*
* Appends 'tmpl' to 'buf', replacing any instances of '%q' with arguments from
* the varargs provided, quoting them to be safe for placing in a BarnOwl
* command line.
*/
void owl_string_appendf_quoted(GString *buf, const char *tmpl, ...)
{
va_list ap;
va_start(ap, tmpl);
owl_string_vappendf_quoted(buf, tmpl, ap);
va_end(ap);
}
void owl_string_vappendf_quoted(GString *buf, const char *tmpl, va_list ap)
{
const char *p = tmpl, *last = tmpl;
while (true) {
p = strchr(p, '%');
if (p == NULL) break;
if (*(p+1) != 'q') {
p++;
if (*p) p++;
continue;
}
g_string_append_len(buf, last, p - last);
owl_string_append_quoted_arg(buf, va_arg(ap, char *));
p += 2; last = p;
}
g_string_append(buf, last);
}
CALLER_OWN char *owl_string_build_quoted(const char *tmpl, ...)
{
GString *buf = g_string_new("");
va_list ap;
va_start(ap, tmpl);
owl_string_vappendf_quoted(buf, tmpl, ap);
va_end(ap);
return g_string_free(buf, false);
}
/* Returns a quoted version of arg suitable for placing in a
* command-line. Result should be freed with g_free. */
CALLER_OWN char *owl_arg_quote(const char *arg)
{
GString *buf = g_string_new("");
owl_string_append_quoted_arg(buf, arg);
return g_string_free(buf, false);
}
/* Returns a quoted version of argv. owl_parseline on the result should give
* back the input. */
CALLER_OWN char *owl_argv_quote(int argc, const char *const *argv)
{
int i;
GString *buf = g_string_new("");
for (i = 0; i < argc; i++) {
if (i > 0)
g_string_append_c(buf, ' ');
owl_string_append_quoted_arg(buf, argv[i]);
}
return g_string_free(buf, false);
}
/* caller must free the return */
CALLER_OWN char *owl_util_format_minutes(int in)
{
int days, hours;
long run;
char *out;
run=in;
days=run/1440;
run-=days*1440;
hours=run/60;
run-=hours*60;
if (days>0) {
out=g_strdup_printf("%i d %2.2i:%2.2li", days, hours, run);
} else {
out=g_strdup_printf(" %2.2i:%2.2li", hours, run);
}
return(out);
}
CALLER_OWN char *owl_util_format_time(const struct tm *time)
{
/* 32 chosen for first attempt because timestr will end up being
* something like "Www Mmm dd hh:mm:ss AM yyyy UTC\0" */
size_t timestr_size = 16;
char *timestr = NULL;
do {
timestr_size *= 2;
timestr = g_renew(char, timestr, timestr_size);
} while (strftime(timestr, timestr_size, "%c", time) == 0);
return timestr;
}
/* These are in order of their value in owl.h */
static const struct {
int number;
const char *name;
} color_map[] = {
{OWL_COLOR_INVALID, "invalid"},
{OWL_COLOR_DEFAULT, "default"},
{OWL_COLOR_BLACK, "black"},
{OWL_COLOR_RED, "red"},
{OWL_COLOR_GREEN, "green"},
{OWL_COLOR_YELLOW,"yellow"},
{OWL_COLOR_BLUE, "blue"},
{OWL_COLOR_MAGENTA, "magenta"},
{OWL_COLOR_CYAN, "cyan"},
{OWL_COLOR_WHITE, "white"},
};
/* Return the owl color associated with the named color. Return -1
* if the named color is not available
*/
int owl_util_string_to_color(const char *color)
{
int c, i;
char *p;
for (i = 0; i < (sizeof(color_map)/sizeof(color_map[0])); i++)
if (strcasecmp(color, color_map[i].name) == 0)
return color_map[i].number;
c = strtol(color, &p, 10);
if (p != color && c >= -1 && c < COLORS) {
return(c);
}
return(OWL_COLOR_INVALID);
}
/* Return a string name of the given owl color */
const char *owl_util_color_to_string(int color)
{
if (color >= OWL_COLOR_INVALID && color <= OWL_COLOR_WHITE)
return color_map[color - OWL_COLOR_INVALID].name;
return("Unknown color");
}
/* Get the default tty name. Caller must free the return */
CALLER_OWN char *owl_util_get_default_tty(void)
{
const char *tmp;
char *out;
if (getenv("DISPLAY")) {
out=g_strdup(getenv("DISPLAY"));
} else if ((tmp=ttyname(fileno(stdout)))!=NULL) {
out=g_strdup(tmp);
if (!strncmp(out, "/dev/", 5)) {
g_free(out);
out=g_strdup(tmp+5);
}
} else {
out=g_strdup("unknown");
}
return(out);
}
/* strip leading and trailing new lines. Caller must free the
* return.
*/
CALLER_OWN char *owl_util_stripnewlines(const char *in)
{
char *tmp, *ptr1, *ptr2, *out;
ptr1=tmp=g_strdup(in);
while (ptr1[0]=='\n') {
ptr1++;
}
ptr2=ptr1+strlen(ptr1)-1;
while (ptr2>ptr1 && ptr2[0]=='\n') {
ptr2[0]='\0';
ptr2--;
}
out=g_strdup(ptr1);
g_free(tmp);
return(out);
}
/* If filename is a link, recursively resolve symlinks. Otherwise, return the filename
* unchanged. On error, call owl_function_error and return NULL.
*
* This function assumes that filename eventually resolves to an acutal file.
* If you want to check this, you should stat() the file first.
*
* The caller of this function is responsible for freeing the return value.
*
* Error conditions are the same as g_file_read_link.
*/
CALLER_OWN gchar *owl_util_recursive_resolve_link(const char *filename)
{
gchar *last_path = g_strdup(filename);
GError *err = NULL;
while (g_file_test(last_path, G_FILE_TEST_IS_SYMLINK)) {
gchar *link_path = g_file_read_link(last_path, &err);
if (link_path == NULL) {
owl_function_error("Cannot resolve symlink %s: %s",
last_path, err->message);
g_error_free(err);
g_free(last_path);
return NULL;
}
/* Deal with obnoxious relative paths. If we really care, all this
* is racy. Whatever. */
if (!g_path_is_absolute(link_path)) {
char *last_dir = g_path_get_dirname(last_path);
char *tmp = g_build_filename(last_dir, link_path, NULL);
g_free(last_dir);
g_free(link_path);
link_path = tmp;
}
g_free(last_path);
last_path = link_path;
}
return last_path;
}
/* Delete all lines matching "line" from the named file. If no such
* line is found the file is left intact. If backup==1 then leave a
* backup file containing the original contents. The match is
* case-insensitive.
*
* Returns the number of lines removed on success. Returns -1 on failure.
*/
int owl_util_file_deleteline(const char *filename, const char *line, int backup)
{
char *backupfile, *newfile, *buf = NULL;
gchar *actual_filename; /* gchar; we need to g_free it */
FILE *old, *new;
struct stat st;
int numremoved = 0;
if ((old = fopen(filename, "r")) == NULL) {
owl_function_error("Cannot open %s (for reading): %s",
filename, strerror(errno));
return -1;
}
if (fstat(fileno(old), &st) != 0) {
owl_function_error("Cannot stat %s: %s", filename, strerror(errno));
fclose(old);
return -1;
}
/* resolve symlinks, because link() fails on symlinks, at least on AFS */
actual_filename = owl_util_recursive_resolve_link(filename);
if (actual_filename == NULL) {
fclose(old);
return -1; /* resolving the symlink failed, but we already logged this error */
}
newfile = g_strdup_printf("%s.new", actual_filename);
if ((new = fopen(newfile, "w")) == NULL) {
owl_function_error("Cannot open %s (for writing): %s",
actual_filename, strerror(errno));
g_free(newfile);
fclose(old);
g_free(actual_filename);
return -1;
}
if (fchmod(fileno(new), st.st_mode & 0777) != 0) {
owl_function_error("Cannot set permissions on %s: %s",
actual_filename, strerror(errno));
unlink(newfile);
fclose(new);
g_free(newfile);
fclose(old);
g_free(actual_filename);
return -1;
}
while (owl_getline_chomp(&buf, old))
if (strcasecmp(buf, line) != 0)
fprintf(new, "%s\n", buf);
else
numremoved++;
g_free(buf);
fclose(new);
fclose(old);
if (backup) {
backupfile = g_strdup_printf("%s.backup", actual_filename);
unlink(backupfile);
if (link(actual_filename, backupfile) != 0) {
owl_function_error("Cannot link %s: %s", backupfile, strerror(errno));
g_free(backupfile);
unlink(newfile);
g_free(newfile);
return -1;
}
g_free(backupfile);
}
if (rename(newfile, actual_filename) != 0) {
owl_function_error("Cannot move %s to %s: %s",
newfile, actual_filename, strerror(errno));
numremoved = -1;
}
unlink(newfile);
g_free(newfile);
g_free(actual_filename);
return numremoved;
}
/* Return the base class or instance from a zephyr class, by removing
leading `un' or trailing `.d'.
The caller is responsible for freeing the allocated string.
*/
CALLER_OWN char *owl_util_baseclass(const char *class)
{
char *start, *end;
while(!strncmp(class, "un", 2)) {
class += 2;
}
start = g_strdup(class);
end = start + strlen(start) - 1;
while(end > start && *end == 'd' && *(end-1) == '.') {
end -= 2;
}
*(end + 1) = 0;
return start;
}
const char * owl_get_datadir(void)
{
const char * datadir = getenv("BARNOWL_DATA_DIR");
if(datadir != NULL)
return datadir;
return DATADIR;
}
const char * owl_get_bindir(void)
{
const char * bindir = getenv("BARNOWL_BIN_DIR");
if(bindir != NULL)
return bindir;
return BINDIR;
}
/* Strips format characters from a valid utf-8 string. Returns the
empty string if 'in' does not validate. Caller must free the return. */
CALLER_OWN char *owl_strip_format_chars(const char *in)
{
char *r;
if (g_utf8_validate(in, -1, NULL)) {
const char *s, *p;
r = g_new(char, strlen(in)+1);
r[0] = '\0';
s = in;
p = strchr(s, OWL_FMTEXT_UC_STARTBYTE_UTF8);
while(p) {
/* If it's a format character, copy up to it, and skip all
immediately following format characters. */
if (owl_fmtext_is_format_char(g_utf8_get_char(p))) {
strncat(r, s, p-s);
p = g_utf8_next_char(p);
while (owl_fmtext_is_format_char(g_utf8_get_char(p))) {
p = g_utf8_next_char(p);
}
s = p;
p = strchr(s, OWL_FMTEXT_UC_STARTBYTE_UTF8);
}
else {
p = strchr(p+1, OWL_FMTEXT_UC_STARTBYTE_UTF8);
}
}
if (s) strcat(r,s);
}
else {
r = g_strdup("");
}
return r;
}
/* If in is not UTF-8, convert from ISO-8859-1. We may want to allow
* the caller to specify an alternative in the future. We also strip
* out characters in Unicode Plane 16, as we use that plane internally
* for formatting.
* Caller must free the return.
*/
CALLER_OWN char *owl_validate_or_convert(const char *in)
{
if (g_utf8_validate(in, -1, NULL)) {
return owl_strip_format_chars(in);
}
else {
return g_convert(in, -1,
"UTF-8", "ISO-8859-1",
NULL, NULL, NULL);
}
}
/*
* Validate 'in' as UTF-8, and either return a copy of it, or an empty
* string if it is invalid utf-8.
* Caller must free the return.
*/
CALLER_OWN char *owl_validate_utf8(const char *in)
{
char *out;
if (g_utf8_validate(in, -1, NULL)) {
out = g_strdup(in);
} else {
out = g_strdup("");
}
return out;
}
/* This is based on _extract() and _isCJ() from perl's Text::WrapI18N */
int owl_util_can_break_after(gunichar c)
{
if (c == ' ') return 1;
if (c >= 0x3000 && c <= 0x312f) {
/* CJK punctuations, Hiragana, Katakana, Bopomofo */
if (c == 0x300a || c == 0x300c || c == 0x300e ||
c == 0x3010 || c == 0x3014 || c == 0x3016 ||
c == 0x3018 || c == 0x301a)
return 0;
return 1;
}
if (c >= 0x31a0 && c <= 0x31bf) {return 1;} /* Bopomofo */
if (c >= 0x31f0 && c <= 0x31ff) {return 1;} /* Katakana extension */
if (c >= 0x3400 && c <= 0x9fff) {return 1;} /* Han Ideogram */
if (c >= 0xf900 && c <= 0xfaff) {return 1;} /* Han Ideogram */
if (c >= 0x20000 && c <= 0x2ffff) {return 1;} /* Han Ideogram */
return 0;
}
/* caller must free the return */
CALLER_OWN char *owl_escape_highbit(const char *str)
{
GString *out = g_string_new("");
unsigned char c;
while((c = (*str++))) {
if(c == '\\') {
g_string_append(out, "\\\\");
} else if(c & 0x80) {
g_string_append_printf(out, "\\x%02x", (int)c);
} else {
g_string_append_c(out, c);
}
}
return g_string_free(out, 0);
}
/* innards of owl_getline{,_chomp} below */
static int owl_getline_internal(char **s, FILE *fp, int newline)
{
int size = 0;
int target = 0;
int count = 0;
int c;
while (1) {
c = getc(fp);
if ((target + 1) > size) {
size += BUFSIZ;
*s = g_renew(char, *s, size);
}
if (c == EOF)
break;
count++;
if (c != '\n' || newline)
(*s)[target++] = c;
if (c == '\n')
break;
}
(*s)[target] = 0;
return count;
}
/* Read a line from fp, allocating memory to hold it, returning the number of
* byte read. *s should either be NULL or a pointer to memory allocated with
* g_malloc; it will be g_renew'd as appropriate. The caller must
* eventually free it. (This is roughly the interface of getline in the gnu
* libc).
*
* The final newline will be included if it's there.
*/
int owl_getline(char **s, FILE *fp)
{
return owl_getline_internal(s, fp, 1);
}
/* As above, but omitting the final newline */
int owl_getline_chomp(char **s, FILE *fp)
{
return owl_getline_internal(s, fp, 0);
}
/* Read the rest of the input available in fp into a string. */
CALLER_OWN char *owl_slurp(FILE *fp)
{
char *buf = NULL;
char *p;
int size = 0;
int count;
while (1) {
buf = g_renew(char, buf, size + BUFSIZ);
p = &buf[size];
size += BUFSIZ;
if ((count = fread(p, 1, BUFSIZ, fp)) < BUFSIZ)
break;
}
p[count] = 0;
return buf;
}
int owl_util_get_colorpairs(void) {
#ifndef NCURSES_EXT_COLORS
/* Without ext-color support (an ABI change), ncurses only supports 256
* different color pairs. However, it gives us a larger number even if your
* ncurses is compiled without ext-color. */
return MIN(COLOR_PAIRS, 256);
#else
return COLOR_PAIRS;
#endif
}
gulong owl_dirty_window_on_signal(owl_window *w, gpointer sender, const gchar *detailed_signal)
{
return owl_signal_connect_object(sender, detailed_signal, G_CALLBACK(owl_window_dirty), w, G_CONNECT_SWAPPED);
}
typedef struct { /*noproto*/
GObject *sender;
gulong signal_id;
} SignalData;
static void _closure_invalidated(gpointer data, GClosure *closure);
/*
* GObject's g_signal_connect_object has a documented bug. This function is
* identical except it does not leak the signal handler.
*/
gulong owl_signal_connect_object(gpointer sender, const gchar *detailed_signal, GCallback c_handler, gpointer receiver, GConnectFlags connect_flags)
{
g_return_val_if_fail (G_TYPE_CHECK_INSTANCE (sender), 0);
g_return_val_if_fail (detailed_signal != NULL, 0);
g_return_val_if_fail (c_handler != NULL, 0);
if (receiver) {
SignalData *sdata;
GClosure *closure;
gulong signal_id;
g_return_val_if_fail (G_IS_OBJECT (receiver), 0);
closure = ((connect_flags & G_CONNECT_SWAPPED) ? g_cclosure_new_object_swap : g_cclosure_new_object) (c_handler, receiver);
signal_id = g_signal_connect_closure (sender, detailed_signal, closure, connect_flags & G_CONNECT_AFTER);
/* Register the missing hooks */
sdata = g_slice_new0(SignalData);
sdata->sender = sender;
sdata->signal_id = signal_id;
g_closure_add_invalidate_notifier(closure, sdata, _closure_invalidated);
return signal_id;
} else {
return g_signal_connect_data(sender, detailed_signal, c_handler, NULL, NULL, connect_flags);
}
}
/*
* There are three ways the signal could come to an end:
*
* 1. The user explicitly disconnects it with the returned signal_id.
* - In that case, the disconnection unref's the closure, causing it
* to first be invalidated. The handler's already disconnected, so
* we have no work to do.
* 2. The sender gets destroyed.
* - GObject will disconnect each signal which then goes into the above
* case. Our handler does no work.
* 3. The receiver gets destroyed.
* - The GClosure was created by g_cclosure_new_object_{,swap} which gets
* invalidated when the receiver is destroyed. We then follow through case 1
* again, but *this* time, the handler has not been disconnected. We then
* clean up ourselves.
*
* We can't actually hook into this process earlier with weakrefs as GObject
* will, on object dispose, first disconnect signals, then invalidate closures,
* and notify weakrefs last.
*/
static void _closure_invalidated(gpointer data, GClosure *closure)
{
SignalData *sdata = data;
if (g_signal_handler_is_connected(sdata->sender, sdata->signal_id)) {
g_signal_handler_disconnect(sdata->sender, sdata->signal_id);
}
g_slice_free(SignalData, sdata);
}
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