diff options
Diffstat (limited to 'driver/prefsw.c')
| -rw-r--r-- | driver/prefsw.c | 1555 |
1 files changed, 1555 insertions, 0 deletions
diff --git a/driver/prefsw.c b/driver/prefsw.c new file mode 100644 index 0000000..2bbf94f --- /dev/null +++ b/driver/prefsw.c @@ -0,0 +1,1555 @@ +/* prefs.c --- reading and writing the ~/.xscreensaver file. + * xscreensaver, Copyright © 1998-2021 Jamie Zawinski <jwz@jwz.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. No representations are made about the suitability of this + * software for any purpose. It is provided "as is" without express or + * implied warranty. + */ + +#ifdef HAVE_CONFIG_H +# include "config.h" +#endif + +#include <stdlib.h> + +#ifdef HAVE_UNISTD_H +# include <unistd.h> +#endif + +#include <stdio.h> +#include <ctype.h> +#include <string.h> +#include <time.h> +#include <sys/stat.h> +#include <sys/time.h> +#include <sys/param.h> /* for PATH_MAX */ +#include <pwd.h> + +#include <X11/Xlib.h> +#include <X11/Xresource.h> +#include <X11/Intrinsic.h> + +#include "version.h" +#include "types.h" +#include "prefs.h" +#include "resources.h" +#include "blurb.h" + +/* don't use realpath() on fedora system */ +#ifdef _FORTIFY_SOURCE +# undef HAVE_REALPATH +#endif + + +extern char *progclass; + +static void get_screenhacks (Display *, saver_preferences *); +static char *format_command (const char *cmd, Bool wrap_p); +static void merge_system_screenhacks (Display *, saver_preferences *, + screenhack **system_list, int count); +static void stop_the_insanity (saver_preferences *p); + +static char *format_hack (Display *, screenhack *, Bool wrap_p); + +static char * +chase_symlinks (const char *file) +{ +# ifdef HAVE_REALPATH + if (file) + { +# ifndef PATH_MAX +# ifdef MAXPATHLEN +# define PATH_MAX MAXPATHLEN +# else +# define PATH_MAX 2048 +# endif +# endif + char buf[PATH_MAX]; + if (realpath (file, buf)) + return strdup (buf); + +/* sprintf (buf, "%.100s: realpath %.200s", blurb(), file); + perror(buf);*/ + } +# endif /* HAVE_REALPATH */ + return 0; +} + + +static Bool +i_am_a_nobody (uid_t uid) +{ + struct passwd *p; + + p = getpwnam ("nobody"); + if (! p) p = getpwnam ("noaccess"); + if (! p) p = getpwnam ("daemon"); + + if (! p) /* There is no nobody? */ + return False; + + return (uid == p->pw_uid); +} + + +const char * +init_file_name (void) +{ + static char *file = 0; + + if (!file) + { + uid_t uid = getuid (); + const char *home = getenv("HOME"); + + if (i_am_a_nobody (uid) || !home || !*home) + { + /* If we're running as nobody, then use root's .xscreensaver file + (since ~root/.xscreensaver and ~nobody/.xscreensaver are likely + to be different -- without this, xscreensaver-settings would + appear to have no effect when the luser is running as root.) + */ + struct passwd *p = getpwuid (uid); + if (!p || !p->pw_name || !*p->pw_name) + { + fprintf (stderr, "%s: couldn't get user info of uid %d\n", + blurb(), getuid ()); + } + else if (!p->pw_dir || !*p->pw_dir) + { + fprintf (stderr, "%s: couldn't get home directory of \"%s\"\n", + blurb(), (p->pw_name ? p->pw_name : "???")); + } + else + { + home = p->pw_dir; + } + } + if (home && *home) + { + const char *name = ".xscreensaver"; + file = (char *) malloc(strlen(home) + strlen(name) + 2); + strcpy(file, home); + if (!*home || home[strlen(home)-1] != '/') + strcat(file, "/"); + strcat(file, name); + } + else + { + file = ""; + } + } + + if (file && *file) + return file; + else + return 0; +} + + +static const char * +init_file_tmp_name (void) +{ + static char *file = 0; + if (!file) + { + const char *name = init_file_name(); + const char *suffix = ".tmp"; + + char *n2 = chase_symlinks (name); + if (n2) name = n2; + + if (!name || !*name) + file = ""; + else + { + file = (char *) malloc(strlen(name) + strlen(suffix) + 2); + strcpy(file, name); + strcat(file, suffix); + } + + if (n2) free (n2); + } + + if (file && *file) + return file; + else + return 0; +} + +static const char * const prefs[] = { + "timeout", + "cycle", + "lock", + "lockVTs", /* not saved */ + "lockTimeout", + "passwdTimeout", + "visualID", + "installColormap", + "verbose", + "splash", + "splashDuration", + "quad", + "demoCommand", + "prefsCommand", + "newLoginCommand", + "helpURL", /* not saved */ + "loadURL", /* not saved */ + "newLoginCommand", /* not saved */ + "nice", + "memoryLimit", /* not saved */ + "fade", + "unfade", + "fadeSeconds", + "fadeTicks", /* not saved */ + "logFile", /* not saved */ + "ignoreUninstalledPrograms", + "font", + "dpmsEnabled", + "dpmsQuickOff", + "dpmsStandby", + "dpmsSuspend", + "dpmsOff", + "grabDesktopImages", + "grabVideoFrames", + "chooseRandomImages", + "imageDirectory", + "mode", + "selected", + "textMode", + "textLiteral", + "textFile", + "textProgram", + "textURL", + "dialogTheme", + "", + "programs", + "", + "pointerHysteresis", + "bourneShell", /* not saved -- X resources only */ + "authWarningSlack", + 0 +}; + +static char * +strip (char *s) +{ + char *s2; + while (*s == '\t' || *s == ' ' || *s == '\r' || *s == '\n') + s++; + for (s2 = s; *s2; s2++) + ; + for (s2--; s2 >= s; s2--) + if (*s2 == '\t' || *s2 == ' ' || *s2 == '\r' || *s2 =='\n') + *s2 = 0; + else + break; + return s; +} + + +/* Reading + */ + +static int +handle_entry (XrmDatabase *db, const char *key, const char *value, + const char *filename, int line) +{ + int i; + for (i = 0; prefs[i]; i++) + if (*prefs[i] && !strcasecmp(key, prefs[i])) + { + char *val = strdup(value); + char *spec = (char *) malloc(strlen(progclass) + strlen(prefs[i]) +10); + strcpy(spec, progclass); + strcat(spec, "."); + strcat(spec, prefs[i]); + + XrmPutStringResource (db, spec, val); + + free(spec); + free(val); + return 0; + } + + /* fprintf(stderr, "%s: %s:%d: unknown option \"%s\"\n", + blurb(), filename, line, key); */ + return 1; +} + + +struct parser_closure { + const char *file; + saver_preferences *prefs; +}; + +static void line_handler (int lineno, + const char *key, const char *val, + void *closure) +{ + struct parser_closure *c = (struct parser_closure *) closure; + saver_preferences *p = c->prefs; + if (!p->db) abort(); + handle_entry (&p->db, key, val, c->file, lineno); +} + +static int +parse_init_file_1 (saver_preferences *p) +{ + time_t write_date = 0; + const char *name = init_file_name(); + struct parser_closure C; + struct stat st; + int status; + + if (!name) return 0; + + C.file = name; + C.prefs = p; + + if (stat(name, &st) == 0) + write_date = st.st_mtime; + else + { + p->init_file_date = 0; + return 0; + } + + status = parse_init_file (name, line_handler, &C); + + p->init_file_date = write_date; + return status; +} + + +Bool +init_file_changed_p (saver_preferences *p) +{ + const char *name = init_file_name(); + struct stat st; + + if (!name) return False; + + if (stat(name, &st) != 0) + return False; + + if (p->init_file_date == st.st_mtime) + return False; + + return True; +} + + +/* Writing + */ + +static int +tab_to (FILE *out, int from, int to) +{ + int tab_width = 8; + int to_mod = (to / tab_width) * tab_width; + while (from < to_mod) + { + fprintf(out, "\t"); + from = (((from / tab_width) + 1) * tab_width); + } + while (from < to) + { + fprintf(out, " "); + from++; + } + return from; +} + +static char * +stab_to (char *out, int from, int to) +{ + int tab_width = 8; + int to_mod = (to / tab_width) * tab_width; + while (from < to_mod) + { + *out++ = '\t'; + from = (((from / tab_width) + 1) * tab_width); + } + while (from < to) + { + *out++ = ' '; + from++; + } + return out; +} + +static int +string_columns (const char *string, int length, int start) +{ + int tab_width = 8; + int col = start; + const char *end = string + length; + while (string < end) + { + if (*string == '\n') + col = 0; + else if (*string == '\t') + col = (((col / tab_width) + 1) * tab_width); + else + col++; + string++; + } + return col; +} + + +static void +write_entry (FILE *out, const char *key, const char *value) +{ + char *v = strdup(value ? value : ""); + char *v2 = v; + char *nl = 0; + int col; + Bool programs_p = (!strcmp(key, "programs")); + int tab = (programs_p ? 32 : 16); + Bool first = True; + + fprintf(out, "%s:", key); + col = strlen(key) + 1; + + if (strlen(key) > 14) + col = tab_to (out, col, 20); + + while (1) + { + if (!programs_p) + v2 = strip(v2); + nl = strchr(v2, '\n'); + if (nl) + *nl = 0; + + if (first && programs_p) + { + col = tab_to (out, col, 77); + fprintf (out, " \\\n"); + col = 0; + } + + if (first) + first = False; + else + { + col = tab_to (out, col, 75); + fprintf (out, " \\n\\\n"); + col = 0; + } + + if (!programs_p) + col = tab_to (out, col, tab); + + if (programs_p && + string_columns(v2, strlen (v2), col) + col > 75) + { + int L = strlen (v2); + int start = 0; + int end = start; + while (start < L) + { + while (v2[end] == ' ' || v2[end] == '\t') + end++; + while (v2[end] != ' ' && v2[end] != '\t' && + v2[end] != '\n' && v2[end] != 0) + end++; + if (string_columns (v2 + start, (end - start), col) >= 74) + { + col = tab_to (out, col, 75); + fprintf(out, " \\\n"); + col = tab_to (out, 0, tab + 2); + while (v2[start] == ' ' || v2[start] == '\t') + start++; + } + + col = string_columns (v2 + start, (end - start), col); + while (start < end) + fputc(v2[start++], out); + } + } + else + { + fprintf (out, "%s", v2); + col += string_columns(v2, strlen (v2), col); + } + + if (nl) + v2 = nl + 1; + else + break; + } + + fprintf(out, "\n"); + free(v); +} + +int +write_init_file (Display *dpy, + saver_preferences *p, const char *version_string, + Bool verbose_p) +{ + int status = -1; + const char *name = init_file_name(); + const char *tmp_name = init_file_tmp_name(); + char *n2 = chase_symlinks (name); + struct stat st; + int i, j; + + /* Kludge, since these aren't in the saver_preferences struct as strings... + */ + char *visual_name; + char *programs; + Bool overlay_stderr_p; + char *stderr_font; + FILE *out; + + if (!name) goto END; + + if (n2) name = n2; + + /* Throttle the various timeouts to reasonable values before writing + the file to disk. */ + stop_the_insanity (p); + + + if (verbose_p) + fprintf (stderr, "%s: writing \"%s\"\n", blurb(), name); + + unlink (tmp_name); + out = fopen(tmp_name, "w"); + if (!out) + { + char *buf = (char *) malloc(1024 + strlen(name)); + sprintf(buf, "%s: error writing \"%s\"", blurb(), name); + perror(buf); + free(buf); + goto END; + } + + /* Give the new .xscreensaver file the same permissions as the old one; + except ensure that it is readable and writable by owner, and not + executable. Extra hack: if we're running as root, make the file + be world-readable (so that the daemon, running as "nobody", will + still be able to read it.) + */ + if (stat(name, &st) == 0) + { + mode_t mode = st.st_mode; + mode |= S_IRUSR | S_IWUSR; /* read/write by user */ + mode &= ~(S_IXUSR | S_IXGRP | S_IXOTH); /* executable by none */ + + if (getuid() == (uid_t) 0) /* read by group/other */ + mode |= S_IRGRP | S_IROTH; + + if (fchmod (fileno(out), mode) != 0) + { + char *buf = (char *) malloc(1024 + strlen(name)); + sprintf (buf, "%s: error fchmodding \"%s\" to 0%o", blurb(), + tmp_name, (unsigned int) mode); + perror(buf); + free(buf); + goto END; + } + } + + /* Kludge, since these aren't in the saver_preferences struct... */ + visual_name = get_string_resource (dpy, "visualID", "VisualID"); + programs = 0; + overlay_stderr_p = get_boolean_resource (dpy, "overlayStderr", "Boolean"); + stderr_font = get_string_resource (dpy, "font", "Font"); + + i = 0; + { + char *ss; + char **hack_strings = (char **) + calloc (p->screenhacks_count, sizeof(char *)); + + for (j = 0; j < p->screenhacks_count; j++) + { + hack_strings[j] = format_hack (dpy, p->screenhacks[j], True); + i += strlen (hack_strings[j]); + i += 2; + } + + ss = programs = (char *) malloc(i + 10); + *ss = 0; + for (j = 0; j < p->screenhacks_count; j++) + { + strcat (ss, hack_strings[j]); + free (hack_strings[j]); + ss += strlen(ss); + *ss++ = '\n'; + *ss = 0; + } + free (hack_strings); + } + + { + struct passwd *pw = getpwuid (getuid ()); + char *whoami = (pw && pw->pw_name && *pw->pw_name + ? pw->pw_name + : "<unknown>"); + time_t now = time ((time_t *) 0); + char *timestr = (char *) ctime (&now); + char *nl = (char *) strchr (timestr, '\n'); + if (nl) *nl = 0; + fprintf (out, + "# %s Preferences File\n" + "# Written by %s %s for %s on %s.\n" + "# https://www.jwz.org/xscreensaver/\n" + "\n", + progclass, progname, version_string, whoami, timestr); + } + + for (j = 0; prefs[j]; j++) + { + char buf[255]; + const char *pr = prefs[j]; + enum pref_type { pref_str, pref_int, pref_bool, pref_byte, pref_time + } type = pref_str; + const char *s = 0; + int i = 0; + Bool b = False; + Time t = 0; + + if (pr && !*pr) + { + fprintf(out, "\n"); + continue; + } + +# undef CHECK +# define CHECK(X) else if (!strcmp(pr, X)) + if (!pr || !*pr) ; + CHECK("timeout") type = pref_time, t = p->timeout; + CHECK("cycle") type = pref_time, t = p->cycle; + CHECK("lock") type = pref_bool, b = p->lock_p; + CHECK("lockVTs") continue; /* don't save, unused */ + CHECK("lockTimeout") type = pref_time, t = p->lock_timeout; + CHECK("passwdTimeout") type = pref_time, t = p->passwd_timeout; + CHECK("visualID") type = pref_str, s = visual_name; + CHECK("installColormap") type = pref_bool, b = p->install_cmap_p; + CHECK("verbose") type = pref_bool, b = p->verbose_p; + CHECK("splash") type = pref_bool, b = p->splash_p; + CHECK("splashDuration") type = pref_time, t = p->splash_duration; + CHECK("quad") continue; /* don't save */ + CHECK("demoCommand") type = pref_str, s = p->demo_command; + CHECK("prefsCommand") continue; /* don't save, unused */ + CHECK("helpURL") continue; /* don't save */ + CHECK("loadURL") continue; /* don't save */ + CHECK("newLoginCommand") continue; /* don't save */ + CHECK("dialogTheme") type = pref_str, s = p->dialog_theme; + CHECK("nice") type = pref_int, i = p->nice_inferior; + CHECK("memoryLimit") continue; /* don't save */ + CHECK("fade") type = pref_bool, b = p->fade_p; + CHECK("unfade") type = pref_bool, b = p->unfade_p; + CHECK("fadeSeconds") type = pref_time, t = p->fade_seconds; + CHECK("fadeTicks") continue; /* don't save */ + CHECK("captureStdout") continue; /* don't save */ + CHECK("logFile") continue; /* don't save */ + CHECK("ignoreUninstalledPrograms") + type = pref_bool, b = p->ignore_uninstalled_p; + + CHECK("font") type = pref_str, s = stderr_font; + + CHECK("dpmsEnabled") type = pref_bool, b = p->dpms_enabled_p; + CHECK("dpmsQuickOff") type = pref_bool, b = p->dpms_quickoff_p; + CHECK("dpmsStandby") type = pref_time, t = p->dpms_standby; + CHECK("dpmsSuspend") type = pref_time, t = p->dpms_suspend; + CHECK("dpmsOff") type = pref_time, t = p->dpms_off; + + CHECK("grabDesktopImages") type =pref_bool, b = p->grab_desktop_p; + CHECK("grabVideoFrames") type =pref_bool, b = p->grab_video_p; + CHECK("chooseRandomImages")type =pref_bool, b = p->random_image_p; + CHECK("imageDirectory") type =pref_str, s = p->image_directory; + + CHECK("mode") type = pref_str, + s = (p->mode == ONE_HACK ? "one" : + p->mode == BLANK_ONLY ? "blank" : + p->mode == DONT_BLANK ? "off" : + p->mode == RANDOM_HACKS_SAME + ? "random-same" + : "random"); + CHECK("selected") type = pref_int, i = p->selected_hack; + + CHECK("textMode") type = pref_str, + s = (p->tmode == TEXT_URL ? "url" : + p->tmode == TEXT_LITERAL ? "literal" : + p->tmode == TEXT_FILE ? "file" : + p->tmode == TEXT_PROGRAM ? "program" : + "date"); + CHECK("textLiteral") type = pref_str, s = p->text_literal; + CHECK("textFile") type = pref_str, s = p->text_file; + CHECK("textProgram") type = pref_str, s = p->text_program; + CHECK("textURL") type = pref_str, s = p->text_url; + + CHECK("programs") type = pref_str, s = programs; + CHECK("pointerHysteresis")type = pref_int, i = p->pointer_hysteresis; + CHECK("overlayStderr") type = pref_bool, b = overlay_stderr_p; + CHECK("overlayTextBackground") continue; /* don't save */ + CHECK("overlayTextForeground") continue; /* don't save */ + CHECK("bourneShell") continue; /* don't save */ + CHECK("authWarningSlack") type = pref_int, i = p->auth_warning_slack; + else + { + fprintf (stderr, "%s: internal error: key %s\n", blurb(), pr); + abort(); + } +# undef CHECK + + switch (type) + { + case pref_str: + break; + case pref_int: + sprintf(buf, "%d", i); + s = buf; + break; + case pref_bool: + s = b ? "True" : "False"; + break; + case pref_time: + { + unsigned int hour = 0, min = 0, sec = (unsigned int) (t/1000); + if (sec >= 60) + { + min += (sec / 60); + sec %= 60; + } + if (min >= 60) + { + hour += (min / 60); + min %= 60; + } + sprintf (buf, "%u:%02u:%02u", hour, min, sec); + s = buf; + } + break; + case pref_byte: + { + if (i >= (1<<30) && i == ((i >> 30) << 30)) + sprintf(buf, "%dG", i >> 30); + else if (i >= (1<<20) && i == ((i >> 20) << 20)) + sprintf(buf, "%dM", i >> 20); + else if (i >= (1<<10) && i == ((i >> 10) << 10)) + sprintf(buf, "%dK", i >> 10); + else + sprintf(buf, "%d", i); + s = buf; + } + break; + default: + abort(); + break; + } + + if (pr && (!strcmp(pr, "mode") || !strcmp(pr, "textMode"))) + fprintf(out, "\n"); + + write_entry (out, pr, s); + } + + fprintf(out, "\n"); + + if (visual_name) free(visual_name); + if (stderr_font) free(stderr_font); + if (programs) free(programs); + + if (fclose(out) == 0) + { + time_t write_date = 0; + + if (stat(tmp_name, &st) == 0) + { + write_date = st.st_mtime; + } + else + { + char *buf = (char *) malloc(1024 + strlen(tmp_name) + strlen(name)); + sprintf(buf, "%s: couldn't stat \"%s\"", blurb(), tmp_name); + perror(buf); + unlink (tmp_name); + free(buf); + goto END; + } + + if (rename (tmp_name, name) != 0) + { + char *buf = (char *) malloc(1024 + strlen(tmp_name) + strlen(name)); + sprintf(buf, "%s: error renaming \"%s\" to \"%s\"", + blurb(), tmp_name, name); + perror(buf); + unlink (tmp_name); + free(buf); + goto END; + } + else + { + p->init_file_date = write_date; + + /* Since the .xscreensaver file is used for IPC, let's try and make + sure that the bits actually land on the disk right away. */ + /* Update 2020: Apparently here in the future, this sometimes takes + 3+ seconds, so let's not. */ + /* sync(); */ + + status = 0; /* wrote and renamed successfully! */ + } + } + else + { + char *buf = (char *) malloc(1024 + strlen(name)); + sprintf(buf, "%s: error closing \"%s\"", blurb(), name); + perror(buf); + free(buf); + unlink (tmp_name); + goto END; + } + + END: + if (n2) free (n2); + return status; +} + + +/* Parsing the resource database + */ + +static void +free_screenhack (screenhack *hack) +{ + if (hack->visual) free (hack->visual); + if (hack->name) free (hack->name); + free (hack->command); + memset (hack, 0, sizeof(*hack)); + free (hack); +} + +static void +free_screenhack_list (screenhack **list, int count) +{ + int i; + if (!list) return; + for (i = 0; i < count; i++) + if (list[i]) + free_screenhack (list[i]); + free (list); +} + + + +/* Populate `saver_preferences' with the contents of the resource database. + Note that this may be called multiple times -- it is re-run each time + the ~/.xscreensaver file is reloaded. + + This function can be very noisy, since it issues resource syntax errors + and so on. + */ +void +load_init_file (Display *dpy, saver_preferences *p) +{ + static Bool first_time = True; + + screenhack **system_default_screenhacks = 0; + int system_default_screenhack_count = 0; + + if (first_time) + { + /* Get the programs resource before the .xscreensaver file has been + parsed and merged into the resource database for the first time: + this is the value of *programs from the app-defaults file. + Then clear it out so that it will be parsed again later, after + the init file has been read. + */ + get_screenhacks (dpy, p); + system_default_screenhacks = p->screenhacks; + system_default_screenhack_count = p->screenhacks_count; + p->screenhacks = 0; + p->screenhacks_count = 0; + } + + if (parse_init_file_1 (p) != 0) /* file might have gone away */ + if (!first_time) return; + + first_time = False; + + p->xsync_p = get_boolean_resource (dpy, "synchronous", "Synchronous"); + p->verbose_p = get_boolean_resource (dpy, "verbose", "Boolean"); + p->lock_p = get_boolean_resource (dpy, "lock", "Boolean"); + p->fade_p = get_boolean_resource (dpy, "fade", "Boolean"); + p->unfade_p = get_boolean_resource (dpy, "unfade", "Boolean"); + p->fade_seconds = 1000 * get_seconds_resource (dpy, "fadeSeconds", "Time"); + p->install_cmap_p = get_boolean_resource (dpy, "installColormap", "Boolean"); + p->nice_inferior = get_integer_resource (dpy, "nice", "Nice"); + p->splash_p = get_boolean_resource (dpy, "splash", "Boolean"); +# ifdef QUAD_MODE + p->quad_p = get_boolean_resource (dpy, "quad", "Boolean"); +# endif + p->ignore_uninstalled_p = get_boolean_resource (dpy, + "ignoreUninstalledPrograms", + "Boolean"); + + p->splash_duration = 1000 * get_seconds_resource (dpy, "splashDuration", "Time"); + p->timeout = 1000 * get_minutes_resource (dpy, "timeout", "Time"); + p->lock_timeout = 1000 * get_minutes_resource (dpy, "lockTimeout", "Time"); + p->cycle = 1000 * get_minutes_resource (dpy, "cycle", "Time"); + p->passwd_timeout = 1000 * get_seconds_resource (dpy, "passwdTimeout", "Time"); + p->pointer_hysteresis = get_integer_resource (dpy, "pointerHysteresis","Integer"); + + p->dpms_enabled_p = get_boolean_resource (dpy, "dpmsEnabled", "Boolean"); + p->dpms_quickoff_p = get_boolean_resource (dpy, "dpmsQuickOff", "Boolean"); + p->dpms_standby = 1000 * get_minutes_resource (dpy, "dpmsStandby", "Time"); + p->dpms_suspend = 1000 * get_minutes_resource (dpy, "dpmsSuspend", "Time"); + p->dpms_off = 1000 * get_minutes_resource (dpy, "dpmsOff", "Time"); + + p->grab_desktop_p = get_boolean_resource (dpy, "grabDesktopImages", "Boolean"); + p->grab_video_p = get_boolean_resource (dpy, "grabVideoFrames", "Boolean"); + p->random_image_p = get_boolean_resource (dpy, "chooseRandomImages", "Boolean"); + p->image_directory = get_string_resource (dpy, + "imageDirectory", + "ImageDirectory"); + + p->text_literal = get_string_resource (dpy, "textLiteral", "TextLiteral"); + p->text_file = get_string_resource (dpy, "textFile", "TextFile"); + p->text_program = get_string_resource (dpy, "textProgram", "TextProgram"); + p->text_url = get_string_resource (dpy, "textURL", "TextURL"); + + p->shell = get_string_resource (dpy, "bourneShell", "BourneShell"); + + p->demo_command = get_string_resource(dpy, "demoCommand", "Command"); + p->help_url = get_string_resource(dpy, "helpURL", "URL"); + p->load_url_command = get_string_resource(dpy, "loadURL", "Command"); + p->new_login_command = get_string_resource(dpy, "newLoginCommand", + "Command"); + p->dialog_theme = get_string_resource(dpy, "dialogTheme", "String"); + p->auth_warning_slack = get_integer_resource(dpy, "authWarningSlack", + "Integer"); + + /* If "*splash" is unset, default to true. */ + { + char *s = get_string_resource (dpy, "splash", "Boolean"); + if (s) + free (s); + else + p->splash_p = True; + } + + /* If "*grabDesktopImages" is unset, default to true. */ + { + char *s = get_string_resource (dpy, "grabDesktopImages", "Boolean"); + if (s) + free (s); + else + p->grab_desktop_p = True; + } + + get_screenhacks (dpy, p); /* Parse the "programs" resource. */ + + { + char *s = get_string_resource (dpy, "selected", "Integer"); + if (!s || !*s) + p->selected_hack = -1; + else + p->selected_hack = get_integer_resource (dpy, "selected", "Integer"); + if (s) free (s); + if (p->selected_hack < 0 || p->selected_hack >= p->screenhacks_count) + p->selected_hack = -1; + } + + { + char *s = get_string_resource (dpy, "mode", "Mode"); + if (s && !strcasecmp (s, "one")) p->mode = ONE_HACK; + else if (s && !strcasecmp (s, "blank")) p->mode = BLANK_ONLY; + else if (s && !strcasecmp (s, "off")) p->mode = DONT_BLANK; + else if (s && !strcasecmp (s, "random-same")) p->mode = RANDOM_HACKS_SAME; + else p->mode = RANDOM_HACKS; + if (s) free (s); + } + + { + char *s = get_string_resource (dpy, "textMode", "TextMode"); + if (s && !strcasecmp (s, "url")) p->tmode = TEXT_URL; + else if (s && !strcasecmp (s, "literal")) p->tmode = TEXT_LITERAL; + else if (s && !strcasecmp (s, "file")) p->tmode = TEXT_FILE; + else if (s && !strcasecmp (s, "program")) p->tmode = TEXT_PROGRAM; + else p->tmode = TEXT_DATE; + if (s) free (s); + } + + if (system_default_screenhack_count) /* note: first_time is also true */ + { + merge_system_screenhacks (dpy, p, system_default_screenhacks, + system_default_screenhack_count); + free_screenhack_list (system_default_screenhacks, + system_default_screenhack_count); + system_default_screenhacks = 0; + system_default_screenhack_count = 0; + } + + if (p->debug_p) + { + p->xsync_p = True; + p->verbose_p = True; + } + + /* Throttle the various timeouts to reasonable values after reading the + disk file. */ + stop_the_insanity (p); +} + + +/* If there are any hacks in the system-wide defaults that are not in + the ~/.xscreensaver file, add the new ones to the end of the list. + This does *not* actually save the file. + */ +static void +merge_system_screenhacks (Display *dpy, saver_preferences *p, + screenhack **system_list, int system_count) +{ + /* Yeah yeah, this is an N^2 operation, but I don't have hashtables handy, + so fuck it. */ + + int made_space = 0; + int i; + for (i = 0; i < system_count; i++) + { + int j; + Bool matched_p = False; + + for (j = 0; j < p->screenhacks_count; j++) + { + char *name; + if (!system_list[i]->name) + system_list[i]->name = make_hack_name (dpy, + system_list[i]->command); + + name = p->screenhacks[j]->name; + if (!name) + name = make_hack_name (dpy, p->screenhacks[j]->command); + + matched_p = !strcasecmp (name, system_list[i]->name); + + if (name != p->screenhacks[j]->name) + free (name); + + if (matched_p) + break; + } + + if (!matched_p) + { + /* We have an entry in the system-wide list that is not in the + user's .xscreensaver file. Add it to the end. + Note that p->screenhacks is a single malloc block, not a + linked list, so we have to realloc it. + */ + screenhack *oh = system_list[i]; + screenhack *nh = (screenhack *) malloc (sizeof(screenhack)); + + if (made_space == 0) + { + made_space = 10; + p->screenhacks = (screenhack **) + realloc (p->screenhacks, + (p->screenhacks_count + made_space + 1) + * sizeof(*p->screenhacks)); + if (!p->screenhacks) abort(); + } + + nh->enabled_p = oh->enabled_p; + nh->visual = oh->visual ? strdup(oh->visual) : 0; + nh->name = oh->name ? strdup(oh->name) : 0; + nh->command = oh->command ? strdup(oh->command) : 0; + + p->screenhacks[p->screenhacks_count++] = nh; + p->screenhacks[p->screenhacks_count] = 0; + made_space--; + +#if 0 + fprintf (stderr, "%s: noticed new hack: %s\n", blurb(), + (nh->name ? nh->name : make_hack_name (dpy, nh->command))); +#endif + } + } +} + + + +/* Parsing the programs resource. + */ + +static screenhack * +parse_screenhack (const char *line) +{ + screenhack *h = (screenhack *) calloc (1, sizeof(*h)); + const char *s; + + h->enabled_p = True; + + while (isspace(*line)) line++; /* skip whitespace */ + if (*line == '-') /* handle "-" */ + { + h->enabled_p = False; + line++; + while (isspace(*line)) line++; /* skip whitespace */ + } + + s = line; /* handle "visual:" */ + while (*line && *line != ':' && *line != '"' && !isspace(*line)) + line++; + if (*line != ':') + line = s; + else + { + h->visual = (char *) malloc (line-s+1); + strncpy (h->visual, s, line-s); + h->visual[line-s] = 0; + if (*line == ':') line++; /* skip ":" */ + while (isspace(*line)) line++; /* skip whitespace */ + } + + if (*line == '"') /* handle "name" */ + { + line++; + s = line; + while (*line && *line != '"') + line++; + h->name = (char *) malloc (line-s+1); + strncpy (h->name, s, line-s); + h->name[line-s] = 0; + if (*line == '"') line++; /* skip "\"" */ + while (isspace(*line)) line++; /* skip whitespace */ + } + + h->command = format_command (line, False); /* handle command */ + return h; +} + + +static char * +format_command (const char *cmd, Bool wrap_p) +{ + int tab = 30; + int col = tab; + char *cmd2 = (char *) calloc (1, 2 * (strlen (cmd) + 1)); + const char *in = cmd; + char *out = cmd2; + while (*in) + { + /* shrink all whitespace to one space, for the benefit of the "demo" + mode display. We only do this when we can easily tell that the + whitespace is not significant (no shell metachars). + */ + switch (*in) + { + case '\'': case '"': case '`': case '\\': + /* Metachars are scary. Copy the rest of the line unchanged. */ + while (*in) + *out++ = *in++, col++; + break; + + case ' ': case '\t': + /* Squeeze all other whitespace down to one space. */ + while (*in == ' ' || *in == '\t') + in++; + *out++ = ' ', col++; + break; + + default: + /* Copy other chars unchanged. */ + *out++ = *in++, col++; + break; + } + } + + *out = 0; + + /* Strip trailing whitespace */ + while (out > cmd2 && isspace (out[-1])) + *(--out) = 0; + + return cmd2; +} + + +/* Returns a new string describing the shell command. + This may be just the name of the program, capitalized. + It also may be something from the resource database (gotten + by looking for "hacks.XYZ.name", where XYZ is the program.) + */ +char * +make_hack_name (Display *dpy, const char *shell_command) +{ + char *s = strdup (shell_command); + char *s2; + char res_name[255]; + + for (s2 = s; *s2; s2++) /* truncate at first whitespace */ + if (isspace (*s2)) + { + *s2 = 0; + break; + } + + s2 = strrchr (s, '/'); /* if pathname, take last component */ + if (s2) + { + s2 = strdup (s2+1); + free (s); + s = s2; + } + + if (strlen (s) > 50) /* 51 is hereby defined as "unreasonable" */ + s[50] = 0; + + sprintf (res_name, "hacks.%s.name", s); /* resource? */ + s2 = get_string_resource (dpy, res_name, res_name); + if (s2) + { + free (s); + return s2; + } + + for (s2 = s; *s2; s2++) /* if it has any capitals, return it */ + if (*s2 >= 'A' && *s2 <= 'Z') + return s; + + if (s[0] >= 'a' && s[0] <= 'z') /* else cap it */ + s[0] -= 'a'-'A'; + if (s[0] == 'X' && s[1] >= 'a' && s[1] <= 'z') /* (magic leading X) */ + s[1] -= 'a'-'A'; + if (s[0] == 'G' && s[1] == 'l' && + s[2] >= 'a' && s[2] <= 'z') /* (magic leading GL) */ + s[1] -= 'a'-'A', + s[2] -= 'a'-'A'; + return s; +} + + +static char * +format_hack (Display *dpy, screenhack *hack, Bool wrap_p) +{ + int tab = 32; + int size; + char *h2, *out, *s; + int col = 0; + + char *def_name = make_hack_name (dpy, hack->command); + + /* Don't ever write out a name for a hack if it's the same as the default. + */ + if (hack->name && !strcmp (hack->name, def_name)) + { + free (hack->name); + hack->name = 0; + } + free (def_name); + + size = (2 * (strlen(hack->command) + + (hack->visual ? strlen(hack->visual) : 0) + + (hack->name ? strlen(hack->name) : 0) + + tab)); + h2 = (char *) malloc (size); + out = h2; + + if (!hack->enabled_p) *out++ = '-'; /* write disabled flag */ + + if (hack->visual && *hack->visual) /* write visual name */ + { + if (hack->enabled_p) *out++ = ' '; + *out++ = ' '; + strcpy (out, hack->visual); + out += strlen (hack->visual); + *out++ = ':'; + *out++ = ' '; + } + + *out = 0; + col = string_columns (h2, strlen (h2), 0); + + if (hack->name && *hack->name) /* write pretty name */ + { + int L = (strlen (hack->name) + 2); + if (L + col < tab) + out = stab_to (out, col, tab - L - 2); + else + *out++ = ' '; + *out++ = '"'; + strcpy (out, hack->name); + out += strlen (hack->name); + *out++ = '"'; + *out = 0; + + col = string_columns (h2, strlen (h2), 0); + if (wrap_p && col >= tab) + out = stab_to (out, col, 77); + else + *out++ = ' '; + + if (out >= h2+size) abort(); + } + + *out = 0; + col = string_columns (h2, strlen (h2), 0); + out = stab_to (out, col, tab); /* indent */ + + if (out >= h2+size) abort(); + s = format_command (hack->command, wrap_p); + strcpy (out, s); + out += strlen (s); + free (s); + *out = 0; + + return h2; +} + + +static void +get_screenhacks (Display *dpy, saver_preferences *p) +{ + int i, j; + int start = 0; + int end = 0; + int size; + char *d = get_string_resource (dpy, "programs", "Programs"); + + free_screenhack_list (p->screenhacks, p->screenhacks_count); + p->screenhacks = 0; + p->screenhacks_count = 0; + + if (!d || !*d) + return; + + size = strlen (d); + + + /* Count up the number of newlines (which will be equal to or larger than + one less than the number of hacks.) + */ + for (i = j = 0; d[i]; i++) + if (d[i] == '\n') + j++; + j++; + + p->screenhacks = (screenhack **) calloc (j + 1, sizeof (screenhack *)); + + /* Iterate over the lines in `d' (the string with newlines) + and make new strings to stuff into the `screenhacks' array. + */ + p->screenhacks_count = 0; + while (start < size) + { + /* skip forward over whitespace. */ + while (d[start] == ' ' || d[start] == '\t' || d[start] == '\n') + start++; + + /* skip forward to newline or end of string. */ + end = start; + while (d[end] != 0 && d[end] != '\n') + end++; + + /* null terminate. */ + d[end] = 0; + + p->screenhacks[p->screenhacks_count++] = parse_screenhack (d + start); + if (p->screenhacks_count >= i) + abort(); + + start = end+1; + } + + free (d); + + if (p->screenhacks_count == 0) + { + free (p->screenhacks); + p->screenhacks = 0; + } +} + + +/* Make sure all the values in the preferences struct are sane. + */ +static void +stop_the_insanity (saver_preferences *p) +{ + if (p->passwd_timeout <= 0) p->passwd_timeout = 30000; /* 30 secs */ + if (p->timeout < 15000) p->timeout = 15000; /* 15 secs */ + if (p->cycle != 0 && p->cycle < 2000) p->cycle = 2000; /* 2 secs */ + if (p->fade_seconds <= 0) + p->fade_p = False; + if (! p->fade_p) p->unfade_p = False; + + /* The DPMS settings may have the value 0. + But if they are negative, or are a range less than 10 seconds, + reset them to sensible defaults. (Since that must be a mistake.) + */ + if (p->dpms_standby != 0 && + p->dpms_standby < 10 * 1000) + p->dpms_standby = 2 * 60 * 60 * 1000; /* 2 hours */ + if (p->dpms_suspend != 0 && + p->dpms_suspend < 10 * 1000) + p->dpms_suspend = 2 * 60 * 60 * 1000; /* 2 hours */ + if (p->dpms_off != 0 && + p->dpms_off < 10 * 1000) + p->dpms_off = 4 * 60 * 60 * 1000; /* 4 hours */ + + /* suspend may not be greater than off, unless off is 0. + standby may not be greater than suspend, unless suspend is 0. + */ + if (p->dpms_off != 0 && + p->dpms_suspend > p->dpms_off) + p->dpms_suspend = p->dpms_off; + if (p->dpms_suspend != 0 && + p->dpms_standby > p->dpms_suspend) + p->dpms_standby = p->dpms_suspend; + + /* These fixes above ignores the case + suspend = 0 and standby > off ... + */ + if (p->dpms_off != 0 && + p->dpms_standby > p->dpms_off) + p->dpms_standby = p->dpms_off; + + if (p->dpms_standby == 0 && /* if *all* are 0, then DPMS is disabled */ + p->dpms_suspend == 0 && + p->dpms_off == 0 && + !p->dpms_quickoff_p) /* ... but we want to do DPMS quick off */ + p->dpms_enabled_p = False; + + + /* Set watchdog timeout to about half of the cycle timeout, but + don't let it be faster than 1/2 minute or slower than 1 minute. + */ + p->watchdog_timeout = p->cycle * 0.6; + if (p->watchdog_timeout < 27000) p->watchdog_timeout = 27000; /* 27 secs */ + if (p->watchdog_timeout > 57000) p->watchdog_timeout = 57000; /* 57 secs */ + + if (p->pointer_hysteresis < 0) p->pointer_hysteresis = 0; + + if (p->auth_warning_slack < 0) p->auth_warning_slack = 0; + if (p->auth_warning_slack > 300) p->auth_warning_slack = 300; +} + + +Bool +senescent_p (void) +{ + /* If you are in here because you're planning on disabling this warning + before redistributing my software, please don't. + + I sincerely request that you do one of the following: + + 1: leave this code intact and this warning in place, -OR- + + 2: Remove xscreensaver from your distribution. + + I would seriously prefer that you not distribute my software at all + than that you distribute one version and then never update it for + years. + + I am *constantly* getting email from users reporting bugs that have + been fixed for literally years who have no idea that the software + they are running is years out of date. Yes, it would be great if we + lived in the ideal world where people checked that they were running + the latest release before they report a bug, but we don't. To most + people, "running the latest release" is synonymous with "running the + latest release that my distro packages for me." + + When they even bother to tell me what version they're running, I + say, "That version is three years old!", and they say "But this is + the latest version my distro ships". Then I say, "your distro + sucks", and they say "but I don't know how to compile from source, + herp derp I eat paste", and *everybody* goes away unhappy. + + It wastes an enormous amount of my time, but worse than that, it + does a grave disservice to the users, who are stuck experiencing + bugs that are already fixed! These users think they are running the + latest release, and they are not. They would like to be running the + actual latest release, but they don't know how, because their distro + makes that very difficult for them. It's terrible for everyone, and + kind of makes me regret ever having released this software in the + first place. + + So seriously. I ask that if you're planning on disabling this + obsolescence warning, that you instead just remove xscreensaver from + your distro entirely. Everybody will be happier that way. Check + out gnome-screensaver instead, I understand it's really nice. + + Of course, my license allows you to ignore me and do whatever the + fuck you want, but as the author, I hope you will have the common + courtesy of complying with my request. + + Thank you! + + jwz, 2014, 2016, 2018, 2021. + + PS: In particular, since Debian refuses to upgrade software on any + kind of rational timeline, I have asked that they stop shipping + xscreensaver at all. They have refused. Instead of upgrading the + software, they simply patched out this warning. + + If you want to witness the sad state of the open source peanut + gallery, look no farther than the comments on my blog: + http://jwz.org/b/yiYo + + Many of these people fall back on their go-to argument of, "If it is + legal, it must be right." If you believe in that rhetorical device + then you are a terrible person, and possibly a sociopath. + + There are also the armchair lawyers who say "Well, instead of + *asking* people to do the right thing out of common courtesy, you + should just change your license to prohibit them from acting + amorally." Again, this is the answer of a sociopath, but that aside, + if you devote even a second's thought to this you will realize that + the end result of this would be for distros like Debian to just keep + shipping the last version with the old license and then never + upgrading it again -- which would be the worst possible outcome for + everyone involved, most especially the users. + + Also, some have incorrectly characterized this as a "time bomb". + It is a software update notification, nothing more. A "time bomb" + makes software stop working. This merely alerts the user that the + security-critical software that they are running is dangerously out + of date. + */ + + time_t now = time ((time_t *) 0); /* d */ + struct tm *tm = localtime (&now); /* o */ + const char *s = screensaver_id; /* n */ + char mon[4], year[5]; /* ' */ + int m, y, mrnths; /* t */ + s = strchr (s, ' '); if (!s) abort(); s++; /* */ + s = strchr (s, '('); if (!s) abort(); s++; /* d */ + s = strchr (s, '-'); if (!s) abort(); s++; /* o */ + strncpy (mon, s, 3); /* o */ + mon[3] = 0; /* */ + s = strchr (s, '-'); if (!s) abort(); s++; /* e */ + strncpy (year, s, 4); /* e */ + year[4] = 0; /* t */ + y = atoi (year); /* , */ + if (!strcmp(mon, "Jan")) m = 0; /* */ + else if (!strcmp(mon, "Feb")) m = 1; /* s */ + else if (!strcmp(mon, "Mar")) m = 2; /* t */ + else if (!strcmp(mon, "Apr")) m = 3; /* o */ + else if (!strcmp(mon, "May")) m = 4; /* p */ + else if (!strcmp(mon, "Jun")) m = 5; /* , */ + else if (!strcmp(mon, "Jul")) m = 6; /* */ + else if (!strcmp(mon, "Aug")) m = 7; /* s */ + else if (!strcmp(mon, "Sep")) m = 8; /* t */ + else if (!strcmp(mon, "Oct")) m = 9; /* a */ + else if (!strcmp(mon, "Nov")) m = 10; /* a */ + else if (!strcmp(mon, "Dec")) m = 11; /* a */ + else abort(); /* h */ + mrnths = ((((tm->tm_year + 1900) * 12) + tm->tm_mon) - /* h */ + (y * 12 + m)); /* h */ + /* p */ + return (mrnths >= 17); /* . */ +} |