src/config.c

   1 #include <string.h>
   2 #include <errno.h>
   3 #include <stdlib.h>
   4 #include <unistd.h>
   5 #include <uci.h>
   6
   7 #include "log.h"
   8 #include "config.h"
   9
  10 static int uci_create_named_section(struct uci_context *ctx, const char *conf_file_name, const char *section_type, const char *section_name)
  11 {
  12         struct uci_ptr          ptr;
  13         int                     ret_val;
  14         char                    *cmd_data;
  15         int                     len;
  16
  17         ret_val = -1;
  18         if ((ctx != NULL) &&
  19             (conf_file_name != NULL) &&
  20             (section_type != NULL) &&
  21             (section_name != NULL)) {
  22                 len             = strlen(conf_file_name);
  23                 len             = len + 1;
  24                 len             = len + strlen(section_type);
  25                 len             = len + 1;
  26                 len             = len + strlen(section_name);
  27                 len             = len + 1;
  28                 cmd_data        = malloc(len);
  29                 if (cmd_data != NULL) {
  30                         snprintf(cmd_data, len, "%s.%s=%s", conf_file_name, section_name, section_type);
  31                         if (uci_lookup_ptr(ctx, &ptr, cmd_data, true) == UCI_OK) {
  32                                 ret_val = uci_set(ctx, &ptr);
  33                                 if (ret_val == UCI_OK) {
  34                                         //ret_val       = uci_save(ctx, ptr.p);
  35                                 }
  36                         }
  37                         free(cmd_data);
  38                 }
  39         }
  40         return ret_val;
  41 }
  42
  43 bool set_config_value(const char *conf_dir_name,
  44                         const char *conf_file_name,
  45                         const char *section_type,
  46                         const char *section_name,
  47                         const char *key,
  48                         const char *value) {
  49         struct uci_context      *ctx;
  50         struct uci_package      *pkg;
  51         struct uci_section      *sct;
  52         struct uci_section      *tmp_sct;
  53         struct uci_option       *opt;
  54         int                     err_flg;
  55         char                    *fname;
  56         int                     b_count;
  57         bool                    save;
  58         struct uci_element      *elem;
  59         struct uci_ptr          ptr;
  60         FILE                    *fp;
  61         bool                    ret_val;
  62
  63         ret_val = false;
  64         save    = false;
  65         if ((conf_dir_name != NULL) &&
  66             (conf_file_name != NULL) &&
  67             (section_type != NULL) &&
  68             (section_name != NULL) &&
  69             (key != NULL) &&
  70             (value != NULL)) {
  71                 b_count = strlen(conf_dir_name) + strlen(conf_file_name) + 10;
  72                 fname   = (char *)calloc(1, b_count);
  73                 if (fname != NULL) {
  74                         strncpy(fname, conf_dir_name, b_count);
  75                         strncat(fname, "/", 1);
  76                         strncat(fname, conf_file_name, strlen(conf_file_name) + 1);
  77                         ctx     = uci_alloc_context();
  78                         if (ctx != NULL) {
  79                                 sct     = NULL;
  80                                 uci_set_confdir(ctx, conf_dir_name);
  81                                 if (access(fname, W_OK) != 0) {
  82                                         if (access(fname, F_OK) != 0) {
  83                                                 fp      = fopen(fname, "w+");
  84                                                 fclose(fp);
  85                                         }
  86                                 }
  87                                 if (access(fname, W_OK) == 0) {
  88                                         err_flg = uci_load(ctx, fname, &pkg);
  89                                         uci_foreach_element(&pkg->sections, elem) {
  90                                                 tmp_sct = uci_to_section(elem);
  91                                                 if (strcmp(tmp_sct->type, section_type) == 0) {
  92                                                         sct     = tmp_sct;
  93                                                         break;
  94                                                 }
  95                                         }
  96                                         if (sct == NULL) {
  97                                                 log_debug("Creating configuration section %s to configuration file: %s\n", section_name, fname);
  98                                                 //err_flg       = uci_add_named_section(ctx, pkg, section_type, section_name, &sct);
  99                                                 //err_flg       = uci_add_section(ctx, pkg, section_name, &sct);
 100                                                 err_flg = uci_create_named_section(ctx, conf_file_name, section_type, section_name);
 101                                                 if (err_flg == UCI_OK) {
 102                                                         uci_foreach_element(&pkg->sections, elem) {
 103                                                                 tmp_sct = uci_to_section(elem);
 104                                                                 if (strcmp(tmp_sct->type, section_type) == 0) {
 105                                                                         sct     = tmp_sct;
 106                                                                         break;
 107                                                                 }
 108                                                         }
 109                                                 }
 110                                         }
 111                                         if (err_flg == 0) {
 112                                                 opt     = uci_lookup_option(ctx, sct, key);
 113                                                 if (opt != NULL) {
 114                                                         memset(&ptr, 0, sizeof(ptr));
 115                                                         ptr.package     = pkg->e.name;
 116                                                         ptr.section     = sct->e.name;
 117                                                         ptr.option      = key;
 118
 119                                                         if (uci_lookup_ptr(ctx, &ptr, NULL, false) == UCI_OK) {
 120                                                                 ptr.value       = value;
 121                                                                 uci_set(ctx, &ptr);
 122                                                                 save    = true;
 123                                                         }
 124                                                 }
 125                                                 else {
 126                                                         opt     = uci_alloc_option(sct, key, value);
 127                                                         save    = true;
 128                                                 }
 129                                                 if (save == true) {
 130                                                         uci_save(ctx, pkg);
 131                                                 }
 132                                                 uci_free_context(ctx);
 133                                                 ret_val = true;
 134                                         }
 135                                         else {
 136                                                 log_error("Could not write to configuration file: %s\n. Could not create section %s.", fname, section_name);
 137                                         }
 138                                 }
 139                                 else {
 140                                         log_error("Could not write to configuration file: %s\n. File does not exist or is not writable.", fname);
 141                                 }
 142                         }
 143                         free(fname);
 144                 }
 145                 else {
 146                         log_error("Could not change config value, out of memory");
 147                 }
 148         }
 149         else {
 150                 log_error("Could not change config value, invalid parameters");
 151         }
 152         return ret_val;
 153 }