| File: | xrefresh.c |
| Location: | line 282, column 6 |
| Description: | Null pointer argument in call to string comparison function |
| 1 | /*********************************************************** | |||
| 2 | ||||
| 3 | Copyright 1987, 1988, 1998 The Open Group | |||
| 4 | ||||
| 5 | Permission to use, copy, modify, distribute, and sell this software and its | |||
| 6 | documentation for any purpose is hereby granted without fee, provided that | |||
| 7 | the above copyright notice appear in all copies and that both that | |||
| 8 | copyright notice and this permission notice appear in supporting | |||
| 9 | documentation. | |||
| 10 | ||||
| 11 | The above copyright notice and this permission notice shall be included in | |||
| 12 | all copies or substantial portions of the Software. | |||
| 13 | ||||
| 14 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |||
| 15 | IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |||
| 16 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | |||
| 17 | OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN | |||
| 18 | AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN | |||
| 19 | CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. | |||
| 20 | ||||
| 21 | Except as contained in this notice, the name of The Open Group shall not be | |||
| 22 | used in advertising or otherwise to promote the sale, use or other dealings | |||
| 23 | in this Software without prior written authorization from The Open Group. | |||
| 24 | ||||
| 25 | ||||
| 26 | Copyright 1987, 1988 by Digital Equipment Corporation, Maynard, Massachusetts. | |||
| 27 | ||||
| 28 | All Rights Reserved | |||
| 29 | ||||
| 30 | Permission to use, copy, modify, and distribute this software and its | |||
| 31 | documentation for any purpose and without fee is hereby granted, | |||
| 32 | provided that the above copyright notice appear in all copies and that | |||
| 33 | both that copyright notice and this permission notice appear in | |||
| 34 | supporting documentation, and that the name of Digital not be | |||
| 35 | used in advertising or publicity pertaining to distribution of the | |||
| 36 | software without specific, written prior permission. | |||
| 37 | ||||
| 38 | DIGITAL DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING | |||
| 39 | ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL | |||
| 40 | DIGITAL BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR | |||
| 41 | ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, | |||
| 42 | WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, | |||
| 43 | ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS | |||
| 44 | SOFTWARE. | |||
| 45 | ||||
| 46 | ******************************************************************/ | |||
| 47 | ||||
| 48 | /* | |||
| 49 | * Kitchen sink version, useful for clearing small areas and flashing the | |||
| 50 | * screen. | |||
| 51 | */ | |||
| 52 | ||||
| 53 | #ifdef HAVE_CONFIG_H1 | |||
| 54 | # include "config.h" | |||
| 55 | #endif | |||
| 56 | ||||
| 57 | #include <stdio.h> | |||
| 58 | #include <errno(*__error()).h> | |||
| 59 | #include <X11/Xos.h> | |||
| 60 | #include <X11/Xlib.h> | |||
| 61 | #include <X11/Xutil.h> | |||
| 62 | #include <stdlib.h> | |||
| 63 | ||||
| 64 | #ifndef HAVE_STRCASECMP1 | |||
| 65 | # include <ctype.h> | |||
| 66 | #endif | |||
| 67 | ||||
| 68 | static Window win; | |||
| 69 | ||||
| 70 | static char *ProgramName; | |||
| 71 | ||||
| 72 | static void _X_NORETURN__attribute((noreturn)) _X_COLD__attribute__((__cold__)) | |||
| 73 | Syntax(void) | |||
| 74 | { | |||
| 75 | fprintf (stderr__stderrp, "usage: %s [-options] [geometry] [display]\n\n%s", | |||
| 76 | ProgramName, | |||
| 77 | "where the available options are:\n" | |||
| 78 | " -display host:dpy or -d\n" | |||
| 79 | " -geometry WxH+X+Y or -g spec\n" | |||
| 80 | " -black use BlackPixel\n" | |||
| 81 | " -white use WhitePixel\n" | |||
| 82 | " -solid colorname use the color indicated\n" | |||
| 83 | " -root use the root background\n" | |||
| 84 | " -none no background in window\n" | |||
| 85 | " -version print program version\n" | |||
| 86 | ); | |||
| 87 | fprintf (stderr__stderrp, "\nThe default is: %s -none\n\n", ProgramName); | |||
| 88 | exit (1); | |||
| 89 | } | |||
| 90 | ||||
| 91 | static void _X_NORETURN__attribute((noreturn)) _X_COLD__attribute__((__cold__)) | |||
| 92 | missing_arg(const char *arg) | |||
| 93 | { | |||
| 94 | fprintf (stderr__stderrp, "%s: %s requires an argument\n\n", ProgramName, arg); | |||
| 95 | Syntax (); | |||
| 96 | } | |||
| 97 | ||||
| 98 | static void _X_NORETURN__attribute((noreturn)) _X_COLD__attribute__((__cold__)) | |||
| 99 | unknown_arg(const char *arg) | |||
| 100 | { | |||
| 101 | fprintf (stderr__stderrp, "%s: unrecognized argument %s\n\n", ProgramName, arg); | |||
| 102 | Syntax (); | |||
| 103 | } | |||
| 104 | ||||
| 105 | /* | |||
| 106 | * The following parses options that should be yes or no; it returns -1, 0, 1 | |||
| 107 | * for error, no, yes. | |||
| 108 | */ | |||
| 109 | ||||
| 110 | static int | |||
| 111 | parse_boolean_option(char *option) | |||
| 112 | { | |||
| 113 | static const struct _booltable { | |||
| 114 | const char *name; | |||
| 115 | int value; | |||
| 116 | } booltable[] = { | |||
| 117 | { "off", 0 }, { "n", 0 }, { "no", 0 }, { "false", 0 }, | |||
| 118 | { "on", 1 }, { "y", 1 }, { "yes", 1 }, { "true", 1 }, | |||
| 119 | { NULL((void*)0), -1 }}; | |||
| 120 | register const struct _booltable *t; | |||
| 121 | ||||
| 122 | #ifndef HAVE_STRCASECMP1 | |||
| 123 | register char *cp; | |||
| 124 | ||||
| 125 | for (cp = option; *cp; cp++) { | |||
| 126 | if (isascii (*cp) && isupper (*cp)) *cp = tolower (*cp); | |||
| 127 | } | |||
| 128 | #endif | |||
| 129 | ||||
| 130 | for (t = booltable; t->name; t++) { | |||
| 131 | #ifdef HAVE_STRCASECMP1 | |||
| 132 | if (strcasecmp (option, t->name) == 0) return (t->value); | |||
| 133 | #else | |||
| 134 | if (strcmp (option, t->name) == 0) return (t->value); | |||
| 135 | #endif | |||
| 136 | } | |||
| 137 | return (-1); | |||
| 138 | } | |||
| 139 | ||||
| 140 | ||||
| 141 | /* | |||
| 142 | * The following is a hack until XrmParseCommand is ready. It determines | |||
| 143 | * whether or not the given string is an abbreviation of the arg. | |||
| 144 | */ | |||
| 145 | ||||
| 146 | static Boolint | |||
| 147 | isabbreviation(const char *arg, char *s, size_t minslen) | |||
| 148 | { | |||
| 149 | size_t arglen; | |||
| 150 | size_t slen; | |||
| 151 | ||||
| 152 | /* exact match */ | |||
| 153 | if (strcmp (arg, s) == 0) return (True1); | |||
| 154 | ||||
| 155 | arglen = strlen (arg); | |||
| 156 | slen = strlen (s); | |||
| 157 | ||||
| 158 | /* too long or too short */ | |||
| 159 | if (slen >= arglen || slen < minslen) return (False0); | |||
| 160 | ||||
| 161 | /* abbreviation */ | |||
| 162 | if (strncmp (arg, s, slen) == 0) return (True1); | |||
| 163 | ||||
| 164 | /* bad */ | |||
| 165 | return (False0); | |||
| 166 | } | |||
| 167 | ||||
| 168 | ||||
| 169 | enum e_action {doDefault, doBlack, doWhite, doSolid, doNone, doRoot}; | |||
| 170 | ||||
| 171 | static const struct s_pair { | |||
| 172 | const char *resource_name; | |||
| 173 | enum e_action action; | |||
| 174 | } pair_table[] = { | |||
| 175 | { "Black", doBlack }, | |||
| 176 | { "White", doWhite }, | |||
| 177 | { "None", doNone }, | |||
| 178 | { "Root", doRoot }, | |||
| 179 | { NULL((void*)0), doDefault }}; | |||
| 180 | ||||
| 181 | int | |||
| 182 | main(int argc, char *argv[]) | |||
| 183 | { | |||
| 184 | Visual visual; | |||
| 185 | XSetWindowAttributes xswa; | |||
| 186 | int i; | |||
| 187 | char *displayname = NULL((void*)0); | |||
| 188 | Display *dpy; | |||
| 189 | Colormap cmap; | |||
| 190 | enum e_action action = doDefault; | |||
| 191 | unsigned long mask; | |||
| 192 | int screen; | |||
| 193 | int x, y, width, height; | |||
| 194 | char *geom = NULL((void*)0); | |||
| 195 | int geom_result; | |||
| 196 | int display_width, display_height; | |||
| 197 | char *solidcolor = NULL((void*)0); | |||
| ||||
| 198 | XColor cdef; | |||
| 199 | ||||
| 200 | ProgramName = argv[0]; | |||
| 201 | ||||
| 202 | for (i = 1; i < argc; i++) { | |||
| 203 | char *arg = argv[i]; | |||
| 204 | ||||
| 205 | if (arg[0] == '-') { | |||
| 206 | if (isabbreviation ("-display", arg, 2)) { | |||
| 207 | if (++i >= argc) missing_arg (arg); | |||
| 208 | displayname = argv[i]; | |||
| 209 | continue; | |||
| 210 | } else if (isabbreviation ("-geometry", arg, 2)) { | |||
| 211 | if (++i >= argc) missing_arg (arg); | |||
| 212 | geom = argv[i]; | |||
| 213 | continue; | |||
| 214 | } else if (isabbreviation ("-black", arg, 2)) { | |||
| 215 | action = doBlack; | |||
| 216 | continue; | |||
| 217 | } else if (isabbreviation ("-white", arg, 2)) { | |||
| 218 | action = doWhite; | |||
| 219 | continue; | |||
| 220 | } else if (isabbreviation ("-solid", arg, 2)) { | |||
| 221 | if (++i >= argc) missing_arg (arg); | |||
| 222 | solidcolor = argv[i]; | |||
| 223 | action = doSolid; | |||
| 224 | continue; | |||
| 225 | } else if (isabbreviation ("-none", arg, 2)) { | |||
| 226 | action = doNone; | |||
| 227 | continue; | |||
| 228 | } else if (isabbreviation ("-root", arg, 2)) { | |||
| 229 | action = doRoot; | |||
| 230 | continue; | |||
| 231 | } else if (isabbreviation ("-version", arg, 1)) { | |||
| 232 | puts(PACKAGE_STRING"xrefresh 1.0.5"); | |||
| 233 | exit(0); | |||
| 234 | } else | |||
| 235 | unknown_arg (arg); | |||
| 236 | } else if (arg[0] == '=') /* obsolete */ | |||
| 237 | geom = arg; | |||
| 238 | else | |||
| 239 | unknown_arg (arg); | |||
| 240 | } | |||
| 241 | ||||
| 242 | if ((dpy = XOpenDisplay(displayname)) == NULL((void*)0)) { | |||
| 243 | fprintf (stderr__stderrp, "%s: unable to open display '%s'\n", | |||
| 244 | ProgramName, XDisplayName (displayname)); | |||
| 245 | exit (1); | |||
| 246 | } | |||
| 247 | ||||
| 248 | if (action == doDefault) { | |||
| 249 | char *def; | |||
| 250 | ||||
| 251 | if ((def = XGetDefault (dpy, ProgramName, "Solid")) != NULL((void*)0)) { | |||
| 252 | solidcolor = strdup (def); | |||
| 253 | if (solidcolor == NULL((void*)0)) { | |||
| 254 | fprintf (stderr__stderrp, | |||
| 255 | "%s: unable to allocate memory for string.\n", | |||
| 256 | ProgramName); | |||
| 257 | exit (1); | |||
| 258 | } | |||
| 259 | action = doSolid; | |||
| 260 | } else { | |||
| 261 | const struct s_pair *pp; | |||
| 262 | ||||
| 263 | for (pp = pair_table; pp->resource_name != NULL((void*)0); pp++) { | |||
| 264 | def = XGetDefault (dpy, ProgramName, pp->resource_name); | |||
| 265 | if (def && parse_boolean_option (def) == 1) { | |||
| 266 | action = pp->action; | |||
| 267 | } | |||
| 268 | } | |||
| 269 | } | |||
| 270 | } | |||
| 271 | ||||
| 272 | if (geom == NULL((void*)0)) geom = XGetDefault (dpy, ProgramName, "Geometry"); | |||
| 273 | ||||
| 274 | screen = DefaultScreen (dpy)(((_XPrivDisplay)(dpy))->default_screen); | |||
| 275 | display_width = DisplayWidth (dpy, screen)((&((_XPrivDisplay)(dpy))->screens[screen])->width); | |||
| 276 | display_height = DisplayHeight (dpy, screen)((&((_XPrivDisplay)(dpy))->screens[screen])->height ); | |||
| 277 | x = y = 0; | |||
| 278 | width = display_width; | |||
| 279 | height = display_height; | |||
| 280 | ||||
| 281 | if (DisplayCells (dpy, screen)(((&((_XPrivDisplay)(dpy))->screens[screen])->root_visual )->map_entries) <= 2 && action == doSolid) { | |||
| 282 | if (strcmp (solidcolor, "black") == 0) | |||
| ||||
| 283 | action = doBlack; | |||
| 284 | else if (strcmp (solidcolor, "white") == 0) | |||
| 285 | action = doWhite; | |||
| 286 | else { | |||
| 287 | fprintf (stderr__stderrp, | |||
| 288 | "%s: can't use colors on a monochrome display.\n", | |||
| 289 | ProgramName); | |||
| 290 | action = doNone; | |||
| 291 | } | |||
| 292 | } | |||
| 293 | ||||
| 294 | if (geom) | |||
| 295 | geom_result = XParseGeometry (geom, &x, &y, | |||
| 296 | (unsigned int *)&width, | |||
| 297 | (unsigned int *)&height); | |||
| 298 | else | |||
| 299 | geom_result = NoValue0x0000; | |||
| 300 | ||||
| 301 | /* | |||
| 302 | * For parsing geometry, we want to have the following | |||
| 303 | * | |||
| 304 | * = (0,0) for (display_width,display_height) | |||
| 305 | * =WxH+X+Y (X,Y) for (W,H) | |||
| 306 | * =WxH-X-Y (display_width-W-X,display_height-H-Y) for (W,H) | |||
| 307 | * =+X+Y (X,Y) for (display_width-X,display_height-Y) | |||
| 308 | * =WxH (0,0) for (W,H) | |||
| 309 | * =-X-Y (0,0) for (display_width-X,display_height-Y) | |||
| 310 | * | |||
| 311 | * If we let any missing values be taken from (0,0) for | |||
| 312 | * (display_width,display_height) we just have to deal with the | |||
| 313 | * negative offsets. | |||
| 314 | */ | |||
| 315 | ||||
| 316 | if (geom_result & XNegative0x0010) { | |||
| 317 | if (geom_result & WidthValue0x0004) { | |||
| 318 | x = display_width - width + x; | |||
| 319 | } else { | |||
| 320 | width = display_width + x; | |||
| 321 | x = 0; | |||
| 322 | } | |||
| 323 | } | |||
| 324 | if (geom_result & YNegative0x0020) { | |||
| 325 | if (geom_result & HeightValue0x0008) { | |||
| 326 | y = display_height - height + y; | |||
| 327 | } else { | |||
| 328 | height = display_height + y; | |||
| 329 | y = 0; | |||
| 330 | } | |||
| 331 | } | |||
| 332 | ||||
| 333 | mask = 0; | |||
| 334 | switch (action) { | |||
| 335 | case doBlack: | |||
| 336 | xswa.background_pixel = BlackPixel (dpy, screen)((&((_XPrivDisplay)(dpy))->screens[screen])->black_pixel ); | |||
| 337 | mask |= CWBackPixel(1L<<1); | |||
| 338 | break; | |||
| 339 | case doWhite: | |||
| 340 | xswa.background_pixel = WhitePixel (dpy, screen)((&((_XPrivDisplay)(dpy))->screens[screen])->white_pixel ); | |||
| 341 | mask |= CWBackPixel(1L<<1); | |||
| 342 | break; | |||
| 343 | case doSolid: | |||
| 344 | cmap = DefaultColormap (dpy, screen)((&((_XPrivDisplay)(dpy))->screens[screen])->cmap); | |||
| 345 | if (XParseColor (dpy, cmap, solidcolor, &cdef) && | |||
| 346 | XAllocColor (dpy, cmap, &cdef)) { | |||
| 347 | xswa.background_pixel = cdef.pixel; | |||
| 348 | mask |= CWBackPixel(1L<<1); | |||
| 349 | } else { | |||
| 350 | fprintf (stderr__stderrp,"%s: unable to allocate color '%s'.\n", | |||
| 351 | ProgramName, solidcolor); | |||
| 352 | xswa.background_pixmap = None0L; | |||
| 353 | mask |= CWBackPixmap(1L<<0); | |||
| 354 | } | |||
| 355 | break; | |||
| 356 | case doDefault: | |||
| 357 | case doNone: | |||
| 358 | xswa.background_pixmap = None0L; | |||
| 359 | mask |= CWBackPixmap(1L<<0); | |||
| 360 | break; | |||
| 361 | case doRoot: | |||
| 362 | xswa.background_pixmap = ParentRelative1L; | |||
| 363 | mask |= CWBackPixmap(1L<<0); | |||
| 364 | break; | |||
| 365 | } | |||
| 366 | xswa.override_redirect = True1; | |||
| 367 | xswa.backing_store = NotUseful0; | |||
| 368 | xswa.save_under = False0; | |||
| 369 | mask |= (CWOverrideRedirect(1L<<9) | CWBackingStore(1L<<6) | CWSaveUnder(1L<<10)); | |||
| 370 | visual.visualid = CopyFromParent0L; | |||
| 371 | win = XCreateWindow(dpy, DefaultRootWindow(dpy)((&((_XPrivDisplay)(dpy))->screens[(((_XPrivDisplay)(dpy ))->default_screen)])->root), x, y, width, height, | |||
| 372 | 0, DefaultDepth(dpy, screen)((&((_XPrivDisplay)(dpy))->screens[screen])->root_depth ), InputOutput1, &visual, mask, &xswa); | |||
| 373 | ||||
| 374 | /* | |||
| 375 | * at some point, we really ought to go walk the tree and turn off | |||
| 376 | * backing store; or do a ClearArea generating exposures on all windows | |||
| 377 | */ | |||
| 378 | XMapWindow (dpy, win); | |||
| 379 | /* the following will free the color that we might have allocated */ | |||
| 380 | XCloseDisplay (dpy); | |||
| 381 | exit (0); | |||
| 382 | } | |||
| 383 |