mirror of https://github.com/gnss-sdr/gnss-sdr
122 lines
3.3 KiB
C
122 lines
3.3 KiB
C
/* Copyright (C) 2010-2019 (see AUTHORS file for a list of contributors)
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*
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* GNSS-SDR is a software-defined Global Navigation Satellite Systems receiver
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*
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* This file is part of GNSS-SDR.
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*
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* SPDX-License-Identifier: GPL-3.0-or-later
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*/
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#include <stdbool.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#if defined(_MSC_VER)
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#include <io.h>
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#define access _access
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#define F_OK 0
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#else
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#include <unistd.h>
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#endif
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#include <volk_gnsssdr/volk_gnsssdr_prefs.h>
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void volk_gnsssdr_get_config_path(char *path, bool read)
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{
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if (!path) return;
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const char *suffix = "/.volk_gnsssdr/volk_gnsssdr_config";
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const char *suffix2 = "/volk_gnsssdr/volk_gnsssdr_config"; // non-hidden
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char *home = NULL;
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// allows config redirection via env variable
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home = getenv("VOLK_CONFIGPATH");
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if (home != NULL)
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{
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strncpy(path, home, 512);
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strcat(path, suffix2);
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if (!read || (access(path, F_OK) != -1))
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{
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return;
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}
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}
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// check for user-local config file
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home = getenv("HOME");
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if (home != NULL)
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{
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strncpy(path, home, 512);
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strcat(path, suffix);
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if (!read || (access(path, F_OK) != -1))
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{
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return;
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}
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}
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// check for config file in APPDATA (Windows)
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home = getenv("APPDATA");
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if (home != NULL)
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{
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strncpy(path, home, 512);
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strcat(path, suffix);
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if (!read || (access(path, F_OK) != -1))
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{
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return;
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}
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}
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// check for system-wide config file
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if (access("/etc/volk_gnsssdr/volk_gnsssdr_config", F_OK) != -1)
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{
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strncpy(path, "/etc", 512);
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strcat(path, suffix2);
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return;
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}
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// if nothing exists, write to HOME or APPDATA
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home = getenv("HOME");
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if (home == NULL) home = getenv("APPDATA");
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if (home != NULL)
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{
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strncpy(path, home, 512);
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strcat(path, suffix);
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return;
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}
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path[0] = 0;
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return;
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}
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size_t volk_gnsssdr_load_preferences(volk_gnsssdr_arch_pref_t **prefs_res)
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{
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FILE *config_file;
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char path[512], line[512];
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size_t n_arch_prefs = 0;
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volk_gnsssdr_arch_pref_t *prefs = NULL;
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// get the config path
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volk_gnsssdr_get_config_path(path, true);
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if (!path[0]) return n_arch_prefs; //no prefs found
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config_file = fopen(path, "r");
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if (!config_file) return n_arch_prefs; //no prefs found
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// reset the file pointer and write the prefs into volk_gnsssdr_arch_prefs
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while (fgets(line, sizeof(line), config_file) != NULL)
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{
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void *new_prefs = realloc(prefs, (n_arch_prefs + 1) * sizeof(*prefs));
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if (!new_prefs)
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{
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printf("volk_gnsssdr_load_preferences: bad malloc\n");
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break;
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}
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prefs = (volk_gnsssdr_arch_pref_t *)new_prefs;
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volk_gnsssdr_arch_pref_t *p = prefs + n_arch_prefs;
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if (sscanf(line, "%s %s %s", p->name, p->impl_a, p->impl_u) == 3 && !strncmp(p->name, "volk_gnsssdr_", 5))
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{
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n_arch_prefs++;
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}
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}
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fclose(config_file);
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*prefs_res = prefs;
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return n_arch_prefs;
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}
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