/* * nvidia-settings: A tool for configuring the NVIDIA X driver on Unix * and Linux systems. * * Copyright (C) 2004 NVIDIA Corporation. * * This program is free software; you can redistribute it and/or * modify it under the terms of Version 2 of the GNU General Public * License as published by the Free Software Foundation. * * This program is distributed in the hope that it will be useful, but * WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See Version 2 * of the GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the: * * Free Software Foundation, Inc. * 59 Temple Place - Suite 330 * Boston, MA 02111-1307, USA * */ /* * config-file.c - this source file contains functions for processing * the NVIDIA X Server control panel configuration file. * * The configuration file is simply a newline-separated list of * attribute strings, where the syntax of an attribute string is * described in the comments of parse.h * * The pound sign ('#') signifies the beginning of a comment; comments * continue until a newline. */ #include #include #include #include #include #include #include #include #include #include #include #include #include "NvCtrlAttributes.h" #include "config-file.h" #include "query-assign.h" #include "parse.h" #include "msg.h" #define MAX_CONFIG_FILE_LINE_LEN 256 typedef struct { ParsedAttribute a; int line; CtrlHandles *h; } ParsedAttributeWrapper; static ParsedAttributeWrapper *parse_config_file(char *buf, const char *file, ConfigProperties *); static int process_config_file_attributes(const char *file, ParsedAttributeWrapper *w, const char *display_name); static void save_gui_parsed_attributes(ParsedAttributeWrapper *w, ParsedAttribute *p); static float get_color_value(int attr, float c[3], float b[3], float g[3]); static int parse_config_property(const char *file, const char *line, ConfigProperties *conf); static void init_config_properties(ConfigProperties *conf); static void write_config_properties(FILE *stream, ConfigProperties *conf, char *locale); /* * nv_read_config_file() - read the specified config file, building a * list of attributes to send. Once all attributes are read, send * them to the X server. * * mmap(2) the file into memory for easier manipulation. * * If an error occurs while parsing the configuration file, an error * message is printed to stderr, NV_FALSE is returned, and nothing is * sent to the X server. * * XXX should we do any sort of versioning to handle compatibility * problems in the future? */ int nv_read_config_file(const char *file, const char *display_name, ParsedAttribute *p, ConfigProperties *conf) { int fd, ret; struct stat stat_buf; char *buf, *locale; ParsedAttributeWrapper *w = NULL; /* initialize the ConfigProperties */ init_config_properties(conf); /* open the file */ fd = open(file, O_RDONLY); if (fd == -1) { /* * It's OK if the file doesn't exist... but should we print a * warning? */ return NV_FALSE; } /* get the size of the file */ ret = fstat(fd, &stat_buf); if (ret == -1) { nv_error_msg("Unable to determine size of file '%s' (%s).", file, strerror(errno)); return NV_FALSE; } if (stat_buf.st_size == 0) { nv_warning_msg("File '%s' has zero size; not reading.", file); close(fd); return NV_TRUE; } /* map the file into memory */ buf = mmap(0, stat_buf.st_size, PROT_READ, MAP_SHARED, fd, 0); if (buf == (void *) -1) { nv_error_msg("Unable to mmap file '%s' for reading (%s).", file, strerror(errno)); return NV_FALSE; } /* * save the current locale, parse the actual text in the file * and restore the saved locale (could be changed). */ locale = strdup(conf->locale); w = parse_config_file(buf, file, conf); setlocale(LC_NUMERIC, locale); free(locale); /* unmap and close the file */ if (munmap (buf, stat_buf.st_size) == -1) { nv_error_msg("Unable to unmap file '%s' after reading (%s).", file, strerror(errno)); return NV_FALSE; } close(fd); if (!w) return NV_FALSE; /* process the parsed attributes */ ret = process_config_file_attributes(file, w, display_name); /* * add any relevant parsed attributes back to the list to be * passed to the gui */ save_gui_parsed_attributes(w, p); if (w) free(w); return ret; } /* nv_read_config_file() */ /* * nv_write_config_file() - write a configuration file to the * specified filename. * * XXX how should this be handled? Currently, we just query all * writable attributes, writing their current value to file. * * XXX should query first, and only once we know we can't fail, then * write the file (to avoid deleting the existing file). */ int nv_write_config_file(const char *filename, CtrlHandles *h, ParsedAttribute *p, ConfigProperties *conf) { int screen, ret, entry, bit, val; FILE *stream; time_t now; AttributeTableEntry *a; ReturnStatus status; NVCTRLAttributeValidValuesRec valid; uint32 mask; char *tmp_d_str, *tmp, *prefix, scratch[4]; char *locale = "C"; stream = fopen(filename, "w"); if (!stream) { nv_error_msg("Unable to open file '%s' for writing.", filename); return NV_FALSE; } /* write header */ now = time(NULL); fprintf(stream, "#\n"); fprintf(stream, "# %s\n", filename); fprintf(stream, "#\n"); fprintf(stream, "# Configuration file for nvidia-settings - the NVIDIA " "X Server Settings utility\n"); /* NOTE: ctime(3) generates a new line */ fprintf(stream, "# Generated on %s", ctime(&now)); fprintf(stream, "#\n"); /* * set the locale to "C" before writing the configuration file to * reduce the risk of locale related parsing problems. Restore * the original locale before exiting this function. */ if (setlocale(LC_NUMERIC, "C") == NULL) { nv_warning_msg("Error writing configuration file '%s': could " "not set the locale 'C'.", filename); locale = conf->locale; } /* write the values in ConfigProperties */ write_config_properties(stream, conf, locale); /* for each screen, query each attribute in the table */ fprintf(stream, "\n"); fprintf(stream, "# Attributes:\n"); fprintf(stream, "\n"); for (screen = 0; screen < h->num_screens; screen++) { /* skip it if we don't have a handle for this screen */ if (!h->h[screen]) continue; /* * construct the prefix that will be printed in the config * file infront of each attribute on this screen; this will * either be "[screen]" or "[displayname]". */ if (conf->booleans & CONFIG_PROPERTIES_INCLUDE_DISPLAY_NAME_IN_CONFIG_FILE) { prefix = h->screen_names[screen]; } else { snprintf(scratch, 4, "%d", screen); prefix = scratch; } /* loop over all the entries in the table */ for (entry = 0; attributeTable[entry].name; entry++) { a = &attributeTable[entry]; /* * skip all attributes that are not supposed to be written * to the config file */ if (a->flags & NV_PARSER_TYPE_NO_CONFIG_WRITE) continue; /* * special case the color attributes because we want to * print floats */ if (a->flags & NV_PARSER_TYPE_COLOR_ATTRIBUTE) { float c[3], b[3], g[3]; status = NvCtrlGetColorAttributes(h->h[screen], c, b, g); if (status != NvCtrlSuccess) continue; fprintf(stream, "%s%c%s=%f\n", prefix, DISPLAY_NAME_SEPARATOR, a->name, get_color_value(a->attr, c, b, g)); continue; } for (bit = 0; bit < 24; bit++) { mask = 1 << bit; if ((h->d[screen] & mask) == 0x0) continue; status = NvCtrlGetValidDisplayAttributeValues(h->h[screen], mask, a->attr, &valid); if (status != NvCtrlSuccess) goto exit_bit_loop; if ((valid.permissions & ATTRIBUTE_TYPE_WRITE) == 0x0) goto exit_bit_loop; status = NvCtrlGetDisplayAttribute(h->h[screen], mask, a->attr, &val); if (status != NvCtrlSuccess) goto exit_bit_loop; if (valid.permissions & ATTRIBUTE_TYPE_DISPLAY) { tmp_d_str = display_device_mask_to_display_device_name(mask); fprintf(stream, "%s%c%s[%s]=%d\n", prefix, DISPLAY_NAME_SEPARATOR, a->name, tmp_d_str, val); free(tmp_d_str); continue; } else { fprintf(stream, "%s%c%s=%d\n", prefix, DISPLAY_NAME_SEPARATOR, a->name, val); /* fall through to exit_bit_loop */ } exit_bit_loop: bit = 25; /* XXX force us out of the display device loop */ } /* bit */ } /* entry */ } /* screen */ /* * loop the ParsedAttribute list, writing the attributes to file. * note that we ignore conf->include_display_name_in_config_file * when writing these parsed attributes; this is because parsed * attributes (like the framelock properties) require a display * name be specified (since there are multiple X servers * involved). */ while (p) { if (!p->next) { p = p->next; continue; } tmp = nv_get_attribute_name(p->attr); if (!tmp) continue; if (p->display_device_mask) { tmp_d_str = display_device_mask_to_display_device_name (p->display_device_mask); fprintf(stream, "%s%c%s[%s]=%d\n", p->display, DISPLAY_NAME_SEPARATOR, tmp, tmp_d_str, p->val); free(tmp_d_str); } else { fprintf(stream, "%s%c%s=%d\n", p->display, DISPLAY_NAME_SEPARATOR, tmp, p->val); } p = p->next; } setlocale(LC_NUMERIC, conf->locale); /* close the configuration file */ ret = fclose(stream); if (ret != 0) { nv_error_msg("Failure while closing file '%s'.", filename); return NV_FALSE; } return NV_TRUE; } /* nv_write_config_file() */ /* * parse_config_file() - scan through the buffer; skipping comment * lines. Non-comment lines with non-whitespace characters are passed * on to nv_parse_attribute_string for parsing. * * If an error occurs, an error message is printed and NULL is * returned. If successful, a malloced array of * ParsedAttributeWrapper structs is returned. The last * ParsedAttributeWrapper in the array has line == -1. It is the * caller's responsibility to free the array. */ static ParsedAttributeWrapper *parse_config_file(char *buf, const char *file, ConfigProperties *conf) { int line, has_data, len, n, ret; char *cur, *c, *comment, tmp[MAX_CONFIG_FILE_LINE_LEN]; ParsedAttributeWrapper *w; cur = buf; line = 1; n = 0; w = NULL; while (cur) { c = cur; comment = NULL; has_data = NV_FALSE;; while((*c != '\n') && (*c != '\0') && (*c != EOF)) { if (comment) { c++; continue; } if (*c == '#') { comment = c; continue; } if (!isspace(*c)) has_data = NV_TRUE; c++; } if (has_data) { if (!comment) comment = c; len = comment - cur; if (len >= MAX_CONFIG_FILE_LINE_LEN) { nv_error_msg("Error parsing configuration file '%s' on " "line %d: line length exceeds maximum " "length of %d.", file, line, MAX_CONFIG_FILE_LINE_LEN); goto failed; } strncpy (tmp, cur, len); tmp[len] = '\0'; /* first, see if this line is a config property */ if (!parse_config_property(file, tmp, conf)) { w = realloc(w, sizeof(ParsedAttributeWrapper) * (n+1)); ret = nv_parse_attribute_string(tmp, NV_PARSER_ASSIGNMENT, &w[n].a); if (ret != NV_PARSER_STATUS_SUCCESS) { nv_error_msg("Error parsing configuration file '%s' on " "line %d: '%s' (%s).", file, line, tmp, nv_parse_strerror(ret)); goto failed; } w[n].line = line; n++; } } if ((*c == '\0') || (*c == EOF)) cur = NULL; else cur = c + 1; line++; } /* mark the end of the array */ w = realloc(w, sizeof(ParsedAttributeWrapper) * (n+1)); w[n].line = -1; return w; failed: if (w) free(w); return NULL; } /* parse_config_file() */ /* * process_config_file_attributes() - process the list of * attributes to be assigned that we acquired in parsing the config * file. */ static int process_config_file_attributes(const char *file, ParsedAttributeWrapper *w, const char *display_name) { int i, j, ret, found, n = 0; CtrlHandles **h = NULL; /* * make sure that all ParsedAttributes have displays (this will do * nothing if we already have a display name */ for (i = 0; w[i].line != -1; i++) { nv_assign_default_display(&w[i].a, display_name); } /* build the list of CtrlHandles */ for (i = 0; w[i].line != -1; i++) { found = NV_FALSE; for (j = 0; j < n; j++) { if (nv_strcasecmp(h[j]->display, w[i].a.display)) { w[i].h = h[j]; found = NV_TRUE; break; } } /* * no handle found for this display, need to create a new * handle. * * XXX we should really just build a list of what ctrl_handles * we need, and what attributes on which ctrl_handles, so that * we don't have to pass NV_CTRL_ATTRIBUTES_ALL_SUBSYSTEMS to * NvCtrlAttributeInit (done in nv_alloc_ctrl_handles()) * unless we really need it. */ if (!found) { h = realloc(h, sizeof(CtrlHandles *) * (n + 1)); h[n] = nv_alloc_ctrl_handles(w[i].a.display); w[i].h = h[n]; n++; } } /* now process each attribute, passing in the correct CtrlHandles */ for (i = 0; w[i].line != -1; i++) { ret = nv_process_parsed_attribute(&w[i].a, w[i].h, NV_TRUE, NV_FALSE, "on line %d of configuration file " "'%s'", w[i].line, file); /* * XXX should we fail if processing the attribute failed? For * now, we'll just keep going through the rest of the config * file. */ } /* free all the CtrlHandles we allocated */ for (i = 0; i < n; i++) { nv_free_ctrl_handles(h[i]); } if (h) free(h); return NV_TRUE; } /* process_config_file_attributes() */ /* * save_gui_parsed_attributes() - scan through the parsed attribute * wrappers, and save any relevant attributes to the attribute list to * be passed to the gui. */ static void save_gui_parsed_attributes(ParsedAttributeWrapper *w, ParsedAttribute *p) { int i; for (i = 0; w[i].line != -1; i++) { if (w[i].a.flags & NV_PARSER_TYPE_GUI_ATTRIUBUTE) { nv_parsed_attribute_add(p, &w[i].a); } } } /* save_gui_parsed_attributes() */ static float get_color_value(int attr, float c[3], float b[3], float g[3]) { switch (attr & (ALL_VALUES | ALL_CHANNELS)) { case (CONTRAST_VALUE | RED_CHANNEL): return c[RED_CHANNEL_INDEX]; case (CONTRAST_VALUE | GREEN_CHANNEL): return c[GREEN_CHANNEL_INDEX]; case (CONTRAST_VALUE | BLUE_CHANNEL): return c[BLUE_CHANNEL_INDEX]; case (BRIGHTNESS_VALUE | RED_CHANNEL): return b[RED_CHANNEL_INDEX]; case (BRIGHTNESS_VALUE | GREEN_CHANNEL): return b[GREEN_CHANNEL_INDEX]; case (BRIGHTNESS_VALUE | BLUE_CHANNEL): return b[BLUE_CHANNEL_INDEX]; case (GAMMA_VALUE | RED_CHANNEL): return g[RED_CHANNEL_INDEX]; case (GAMMA_VALUE | GREEN_CHANNEL): return g[GREEN_CHANNEL_INDEX]; case (GAMMA_VALUE | BLUE_CHANNEL): return g[BLUE_CHANNEL_INDEX]; default: return 0.0; } } /* get_color_value() */ /* * Table of ConfigProperties (properties of the nvidia-settings * utilities itself, rather than properties of the X screen(s) that * nvidia-settings is configuring). The table just binds string names * to the bitmask constants. */ typedef struct { char *name; unsigned int flag; } ConfigPropertiesTableEntry; ConfigPropertiesTableEntry configPropertyTable[] = { { "ToolTips", CONFIG_PROPERTIES_TOOLTIPS }, { "DisplayStatusBar", CONFIG_PROPERTIES_DISPLAY_STATUS_BAR }, { "SliderTextEntries", CONFIG_PROPERTIES_SLIDER_TEXT_ENTRIES }, { "IncludeDisplayNameInConfigFile", CONFIG_PROPERTIES_INCLUDE_DISPLAY_NAME_IN_CONFIG_FILE }, { "ShowQuitDialog", CONFIG_PROPERTIES_SHOW_QUIT_DIALOG }, { NULL, 0 } }; /* * parse_config_property() - special case the config properties; if * the given line sets a config property, update conf as appropriate * and return NV_TRUE. If the given line does not describe a config * property, return NV_FALSE. */ static int parse_config_property(const char *file, const char *line, ConfigProperties *conf) { char *no_spaces, *s; char *locale; ConfigPropertiesTableEntry *t; int ret = NV_FALSE; unsigned int flag; no_spaces = remove_spaces(line); if (!no_spaces) goto done; s = strchr(no_spaces, '='); if (!s) goto done; *s = '\0'; if (nv_strcasecmp(no_spaces, "RcFileLocale")) { locale = ++s; if (setlocale(LC_NUMERIC, locale) == NULL) { nv_warning_msg("Error parsing configuration file '%s': could " "not set the specified locale '%s'.", file, locale); ret = NV_TRUE; goto done; } } else { for (t = configPropertyTable, flag = 0; t->name; t++) { if (nv_strcasecmp(no_spaces, t->name)) { flag = t->flag; break; } } if (!flag) goto done; s++; if (nv_strcasecmp(s, "yes")) { conf->booleans |= flag; } else if (nv_strcasecmp(s, "no")) { conf->booleans &= ~flag; } else { goto done; } } ret = NV_TRUE; done: if (no_spaces) free(no_spaces); return ret; } /* parse_config_property() */ /* * write_config_properties() - write the ConfigProperties to file; * this just amounts to looping through the table, and printing if * each property is enabled or disabled. */ static void write_config_properties(FILE *stream, ConfigProperties *conf, char *locale) { ConfigPropertiesTableEntry *t; fprintf(stream, "\n"); fprintf(stream, "# ConfigProperties:\n"); fprintf(stream, "\n"); fprintf(stream, "RcFileLocale = %s\n", locale); for (t = configPropertyTable; t->name; t++) { fprintf(stream, "%s = %s\n", t->name, (t->flag & conf->booleans) ? "Yes" : "No"); } } /* write_config_properties()*/ /* * init_config_properties() - initialize the ConfigProperties * structure. */ static void init_config_properties(ConfigProperties *conf) { memset(conf, 0, sizeof(ConfigProperties)); conf->booleans = (CONFIG_PROPERTIES_TOOLTIPS | CONFIG_PROPERTIES_DISPLAY_STATUS_BAR | CONFIG_PROPERTIES_SLIDER_TEXT_ENTRIES | CONFIG_PROPERTIES_SHOW_QUIT_DIALOG); conf->locale = strdup(setlocale(LC_NUMERIC, NULL)); } /* init_config_properties() */