From 7307e06122997f3d5e0108cd1bab4b11a1d5ebdc Mon Sep 17 00:00:00 2001 From: Bernhard Reutner-Fischer Date: Wed, 18 Feb 2009 15:28:43 +0000 Subject: [PATCH] - bail out if screen resolution does not match PPM dimensions. Previously a 640x480 PPM on an e.g. 720x400 console would just segfault when reading the lines. While this bug should perhaps be fixed to handle such cases properly we just exit gracefully until somebody is willing to take care of it properly. --- miscutils/fbsplash.c | 4 +++- util-linux/fbset.c | 38 +++++++++++++++++++++++++------------- 2 files changed, 28 insertions(+), 14 deletions(-) diff --git a/miscutils/fbsplash.c b/miscutils/fbsplash.c index 1ea5d8ebb..ec0f092dc 100644 --- a/miscutils/fbsplash.c +++ b/miscutils/fbsplash.c @@ -257,7 +257,9 @@ static void fb_drawimage(void) if (ENABLE_FEATURE_CLEAN_UP) free(head); - + if (width != G.scr_var.xres || height != G.scr_var.yres) + bb_error_msg_and_die("PPM %dx%d does not match screen %dx%d", + width, height, G.scr_var.xres, G.scr_var.yres); line_size = width*3; if (width > G.scr_var.xres) width = G.scr_var.xres; diff --git a/util-linux/fbset.c b/util-linux/fbset.c index 590918aab..e0081667f 100644 --- a/util-linux/fbset.c +++ b/util-linux/fbset.c @@ -30,7 +30,8 @@ enum { /* CMD_XCOMPAT = 10, */ CMD_ALL = 11, CMD_INFO = 12, - CMD_CHANGE = 13, + CMD_SHOW = 13, + CMD_CHANGE = 14, #if ENABLE_FEATURE_FBSET_FANCY CMD_XRES = 100, @@ -123,7 +124,8 @@ static const struct cmdoptions_t { { "vsync" , 1, CMD_VSYNC }, { "laced" , 1, CMD_LACED }, { "double" , 1, CMD_DOUBLE }, - { "n" , 0, CMD_CHANGE }, + { "show" , 0, CMD_SHOW }, + { "s" , 0, CMD_SHOW }, #if ENABLE_FEATURE_FBSET_FANCY { "all" , 0, CMD_ALL }, { "xres" , 1, CMD_XRES }, @@ -172,7 +174,7 @@ static void ss(uint32_t *x, uint32_t flag, char *buf, const char *what) *x |= flag; } -static int readmode(struct fb_var_screeninfo *base, const char *fn, +static int read_mode_db(struct fb_var_screeninfo *base, const char *fn, const char *mode) { char *token[2], *p, *s; @@ -302,7 +304,7 @@ int fbset_main(int argc, char **argv) { enum { OPT_CHANGE = (1 << 0), - /*OPT_INFO = (1 << 1), ??*/ + OPT_SHOW = (1 << 1), OPT_READMODE = (1 << 2), OPT_ALL = (1 << 9), }; @@ -333,6 +335,12 @@ int fbset_main(int argc, char **argv) case CMD_DB: modefile = argv[1]; break; + case CMD_ALL: + options |= OPT_ALL; + break; + case CMD_SHOW: + options |= OPT_SHOW; + break; case CMD_GEOMETRY: varset.xres = xatou32(argv[1]); varset.yres = xatou32(argv[2]); @@ -349,12 +357,6 @@ int fbset_main(int argc, char **argv) varset.hsync_len = xatou32(argv[6]); varset.vsync_len = xatou32(argv[7]); break; - case CMD_ALL: - options |= OPT_ALL; - break; - case CMD_CHANGE: - options |= OPT_CHANGE; - break; #if ENABLE_FEATURE_FBSET_FANCY case CMD_XRES: varset.xres = xatou32(argv[1]); @@ -367,6 +369,15 @@ int fbset_main(int argc, char **argv) break; #endif } + switch (g_cmdoptions[i].code) { + case CMD_FB: + case CMD_DB: + case CMD_ALL: + case CMD_SHOW: + break; + default: + options |= OPT_CHANGE; /* the other commands imply changes */ + } argc -= g_cmdoptions[i].param_count; argv += g_cmdoptions[i].param_count; goto contin; @@ -384,19 +395,20 @@ int fbset_main(int argc, char **argv) #if !ENABLE_FEATURE_FBSET_READMODE bb_show_usage(); #else - if (!readmode(&var, modefile, mode)) { + if (!read_mode_db(&var, modefile, mode)) { bb_error_msg_and_die("unknown video mode '%s'", mode); } #endif } - setmode(&var, &varset); if (options & OPT_CHANGE) { + setmode(&var, &varset); if (options & OPT_ALL) var.activate = FB_ACTIVATE_ALL; xioctl(fh, FBIOPUT_VSCREENINFO, &var); } - showmode(&var); + if (options == 0 || options & OPT_SHOW) + showmode(&var); /* Don't close the file, as exiting will take care of that */ /* close(fh); */ -- 2.25.1