/** * Copyright © 2016 Mattias Andrée * * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * 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 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, see . */ #include "state.h" #include "solar.h" #include #include #include #include #include #include #define try(...) do { if (!(__VA_ARGS__)) goto fail; } while (0) #define t(...) do { if (__VA_ARGS__) goto fail; } while (0) /** * The name of the process. */ extern char *argv0; /** * All sites. */ static libgamma_site_state_t *sites = NULL; /** * The number of sites stored in `sites`. */ static size_t sites_n = 0; /** * Is it daytime, night, perhaps some kind of twilight? * * @param elevation The Sun's apparent elevation. * @return The time of the day. */ enum darkness get_darkness(double elevation) { if (elevation > SOLAR_ELEVATION_SUNSET_SUNRISE) return DAYTIME; if (elevation > SOLAR_ELEVATION_CIVIL_DUSK_DAWN) return CIVIL_TWILIGHT; if (elevation > SOLAR_ELEVATION_NAUTICAL_DUSK_DAWN) return NAUTICAL_TWILIGHT; if (elevation > SOLAR_ELEVATION_ASTRONOMICAL_DUSK_DAWN) return ASTRONOMICAL_TWILIGHT; return NIGHT; } /** * Compare two display server environment strings. * * @param a_ One of the string. * @param b_ The other string. * @return -1, 0, or +1. */ static int displayenvcmp(const void *a_, const void *b_) { #define S(V, CD) ((V = ((CD)[1] == 'r' ? strrchr : strchr)(V, (CD)[0]))) #ifdef __GNUC__ # pragma GCC diagnostic push # pragma GCC diagnostic ignored "-Wdiscarded-qualifiers" #endif char *a = a_; char *b = b_; #ifdef __GNUC__ # pragma GCC diagnostic pop #endif char *p = strchr(a, '=') + 1; char *q = strchr(b, '=') + 1; int rc; if ((*p != '/') && S(p, ":r") && S(p, ".l")) *p = '\0'; else p = NULL; if ((*q != '/') && S(p, ":r") && S(p, ".l")) *q = '\0'; else q = NULL; rc = strcmp(a, b); if (*p) *p = '.'; if (*q) *q = '.'; return rc; #undef S } /** * Make an display string safe for a pathname. * * @param str The string. * @return A safe version of the string, `NULL` on error. */ static char * escape_display(const char* str) { char *r, *w, *rc = malloc((2 * strlen(str) + 1) * sizeof(char)); int s = 0; if (!rc) return NULL; memcpy(rc, str, (strlen(str) + 1) * sizeof(char)); for (r = w = strchr(rc, '=') + 1; *r; r++) { if (!s || (*r != '/')) { if (strchr("@=/", *r)) *w++ = '@'; *w++ = (*r == '/' ? 's' : *r); s = (*r == '/'); } } w[s ? -2 : 0] = '\0'; return rc; } /** * The string of display servers. * * @param settings The settings. * @return The string, `NULL` on error. */ static char * get_display_string(const struct settings *settings) { const char *var, *val; char *r, *d = NULL, *rc = NULL, **displays; size_t i, n = 0, len = 0; int method, saved_errno; try (displays = malloc(settings->monitors_n * sizeof(char *))); for (i = 0; i < settings->monitors_n; i++) if ((settings->monitors_arg[i] == 'd') && strchr(settings->monitors_id[i], '=')) len += 1 + strlen(displays[n++] = settings->monitors_id[i]); if (n) goto custom; free(displays), displays = NULL; if (!libgamma_list_methods(&method, 1, 0)) { fprintf(stderr, "No display was found.\n" "DRM support missing.\n" "Can you even see?\n"); return free(displays), errno = 0, NULL; } var = libgamma_method_default_site_variable(method); val = libgamma_method_default_site(method); if (!val) return strdup(""); try (d = malloc((3 + strlen(var) + strlen(val)) * sizeof(char))); stpcpy(stpcpy(stpcpy(stpcpy(d, "."), var), "="), val); try (rc = escape_display(d)); return free(d), rc; custom: qsort(displays, n, sizeof(*displays), displayenvcmp); try (r = rc = malloc((2 * len + 1) * sizeof(char))); for (i = 0; i < n; i++) { try (d = escape_display(displays[i])); r = stpcpy(stpcpy(r, "."), d), free(d), d = NULL; } free(displays); return rc; fail: saved_errno = errno, free(rc), free(d), free(displays), errno = saved_errno; return NULL; } /** * Set $RADHARC_STATE. * * @param settings The settings. * @return 0 on success, -1 on error. */ int get_state_pathname(const struct settings *settings) { const char *dir = getenv("XGD_RUNTIME_DIR"); char *display = NULL; char *env = NULL; int rc = -1, saved_errno; try (display = get_display_string(settings)); if (!dir || !*dir) dir = "/run"; try (env = malloc((strlen(dir) + sizeof("/radharc/") + strlen(display)) * sizeof(char))); stpcpy(stpcpy(stpcpy(env, dir), "/radharc/"), display); rc = setenv("RADHARC_STATE", env, 1); fail: return saved_errno = errno, free(env), free(display), errno = saved_errno, rc; } /** * Parse a value for the -d option, or select preferred adjustment method. * * @param display The argument for the -d option. `NULL` for the preferred adjustment method. * @return The adjustment method. -1 if not found. */ static int get_clut_method(const char *display) { int method; const char *env; if (!display) { if (!libgamma_list_methods(&method, 1, 0)) { fprintf(stderr, "No display was found.\n" "DRM support missing.\n" "Can you even see?\n"); return errno = 0, -1; } return method; } if (!strcasecmp(display, "none")) return INT_MAX; if (!strcasecmp(display, "drm")) return LIBGAMMA_METHOD_LINUX_DRM; if (!strchr(display, '=')) { fprintf(stderr, "Specified display\n" "cannot be recognised.\n" "Try something else.\n"); return errno = 0, -1; } for (method = 0; method < LIBGAMMA_METHOD_COUNT; method++) { env = libgamma_method_default_site_variable(method); if (env && (strstr(display, env) == display) && (display[strlen(env)] == '=')) return method; } fprintf(stderr, "Specified display\n" "cannot be recognised.\n" "Try to recompile.\n"); return errno = 0, -1; } /** * Initialise the CLUT support. * * @param settings The settings. * @return 0 on success, -1 on error. */ int initialise_clut(const struct settings *settings) { #define NONE_METHOD (method == INT_MAX) int method = 0, error = 0, is_none = 0; const char *sitename_; char *sitename = NULL; void *new; size_t i; int saved_errno; try (sites = calloc(settings->monitors_n + 2, sizeof(*sites))); for (i = 0; i < settings->monitors_n; i++) { switch (settings->monitors_arg[i]) { case 'd': t ((method = get_clut_method(sitename_ = settings->monitors_id[i])) < 0); if (NONE_METHOD) break; sitename_ = strchr(sitename_, '='); if (sitename_) try ((sitename = strdup(sitename_ + 1))); t ((error = libgamma_site_initialise(sites + sites_n, method, sitename))); sitename = NULL; sites_n++; break; case 'm': if (NONE_METHOD) break; /* TODO -m */ break; case 'e': if (NONE_METHOD) break; /* TODO -e */ break; } } new = realloc(sites, (sites_n + 1) * sizeof(*sites)); sites = new ? new : sites; return 0; fail: if (error) libgamma_perror(argv0, error), errno = 0; saved_errno = errno, free(sitename), errno = saved_errno; return -1; }