nico/NickelMenu-custom
1
0
Fork 0
Code Releases 1 Activity

Implemented config file parsing

Browse Source
This commit is contained in:
Patrick Gaskin
2020-04-22 21:17:21 -04:00
parent 9d231999a7
commit a19ece7cd8
2 changed files with 151 additions and 8 deletions
Download Patch File Download Diff File Expand all files Collapse all files

150
src/config.c
View File

@@ -1,9 +1,14 @@
#define _GNU_SOURCE
#define _GNU_SOURCE // asprintf
#include <ctype.h>
#include <dirent.h>
#include <errno.h>
#include <stdbool.h>
#include <stddef.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/stat.h>
#include <sys/types.h>
#include "action_c.h"
#include "action_cc.h"
@@ -11,6 +16,10 @@
#include "menu.h"
#include "util.h"
#ifndef NMI_CONFIG_DIR
#define NMI_CONFIG_DIR "/mnt/onboard/.adds/nmi"
#endif
typedef enum {
NMI_CONFIG_TYPE_MENU_ITEM = 1,
} nmi_config_type_t;
@@ -23,16 +32,149 @@ struct nmi_config_t {
nmi_config_t *next;
};
// strtrim trims ASCII whitespace in-place (i.e. don't give it a string literal)
// from the left/right of the string.
static char *strtrim(char *s){
if (!s) return NULL;
char *a = s, *b = s + strlen(s);
for (; a < b && isspace((unsigned char)(*a)); a++);
for (; b > a && isspace((unsigned char)(*(b-1))); b--);
*b = '\0';
return a;
}
static void nmi_config_push_menu_item(nmi_config_t **cfg, nmi_menu_item_t *it) {
nmi_config_t *tmp = calloc(1, sizeof(nmi_config_t));
tmp->type = NMI_CONFIG_TYPE_MENU_ITEM;
tmp->value.menu_item = it;
tmp->next = *cfg;
*cfg = tmp;
}
nmi_config_t *nmi_config_parse(char **err_out) {
#define NMI_ERR_RET NULL
NMI_LOG("config: reading config dir %s", NMI_CONFIG_DIR);
NMI_RETURN_ERR("not implemented");
// set up the linked list
nmi_config_t *cfg = NULL;
// open the config dir
DIR *cfgdir;
NMI_ASSERT((cfgdir = opendir(NMI_CONFIG_DIR)), "could not open config dir: %s", strerror(errno));
// loop over the dirents of the config dir
struct dirent *dirent; errno = 0;
while ((dirent = readdir(cfgdir))) {
char *fn;
NMI_ASSERT(asprintf(&fn, "%s/%s", NMI_CONFIG_DIR, dirent->d_name) != -1, "could not build full path for config file");
// skip it if it isn't a file
bool reg = dirent->d_type == DT_REG;
if (dirent->d_type == DT_UNKNOWN) {
struct stat statbuf;
NMI_ASSERT(!stat(fn, &statbuf), "could not stat %s", fn);
reg = S_ISREG(statbuf.st_mode);
}
if (!reg) {
NMI_LOG("config: skipping %s because not a regular file", fn);
continue;
}
// open the config file
NMI_LOG("config: reading config file %s", fn);
FILE *cfgfile;
NMI_ASSERT((cfgfile = fopen(fn, "r")), "could not open file: %s", strerror(errno));
#define RETERR(fmt, ...) do { \
fclose(cfgfile); \
free(line); \
closedir(cfgdir); \
NMI_RETURN_ERR(fmt, ##__VA_ARGS__); \
} while (0)
// parse each line
char *line;
int line_n;
ssize_t line_sz;
size_t line_bufsz = 0;
while ((line_sz = getline(&line, &line_bufsz, cfgfile)) != -1) {
line_n++;
// empty line or comment
char *cur = strtrim(line);
if (!*cur || *cur == '#')
continue;
// field 1: type
char *c_typ = strtrim(strsep(&cur, ":"));
if (!strcmp(c_typ, "menu_item")) {
// type: menu_item
nmi_menu_item_t *it = calloc(1, sizeof(nmi_menu_item_t));
// type: menu_item - field 2: location
char *c_loc = strtrim(strsep(&cur, ":"));
if (!c_loc) RETERR("file %s: line %d: field 2: expected location, got end of line", fn, line_n);
else if (!strcmp(c_loc, "main")) it->loc = NMI_MENU_LOCATION_MAIN_MENU;
else if (!strcmp(c_loc, "reader")) it->loc = NMI_MENU_LOCATION_READER_MENU;
else RETERR("file %s: line %d: field 2: unknown location '%s'", fn, line_n, c_loc);
// type: menu_item - field 3: label
char *c_lbl = strtrim(strsep(&cur, ":"));
if (!c_lbl) RETERR("file %s: line %d: field 3: expected label, got end of line", fn, line_n);
else it->lbl = strdup(c_lbl);
// type: menu_item - field 4: action
char *c_act = strtrim(strsep(&cur, ":"));
if (!c_act) RETERR("file %s: line %d: field 4: expected action, got end of line", fn, line_n);
else if (!strcmp(c_act, "dbg_syslog")) it->act = nmi_action_dbgsyslog;
else if (!strcmp(c_act, "dbg_error")) it->act = nmi_action_dbgerror;
else if (!strcmp(c_act, "kfmon")) it->act = nmi_action_kfmon;
else if (!strcmp(c_act, "nickel_setting")) it->act = nmi_action_nickelsetting;
else if (!strcmp(c_act, "nickel_extras")) it->act = nmi_action_nickelextras;
else if (!strcmp(c_act, "nickel_misc")) it->act = nmi_action_nickelmisc;
else RETERR("file %s: line %d: field 4: unknown action '%s'", fn, line_n, c_act);
// type: menu_item - field 5: argument
char *c_arg = strtrim(cur);
if (!c_arg) RETERR("file %s: line %d: field 5: expected argument, got end of line\n", fn, line_n);
else it->arg = strdup(c_arg);
nmi_config_push_menu_item(&cfg, it);
} else RETERR("file %s: line %d: field 1: unknown type '%s'", fn, line_n, c_typ);
}
#undef RETERR
fclose(cfgfile);
free(line);
}
NMI_ASSERT(!errno, "could not read config dir: %s", strerror(errno));
// close the config dir
closedir(cfgdir);
// add a default entry if none were found
if (!cfg) {
nmi_menu_item_t *it = calloc(1, sizeof(nmi_menu_item_t));
it->loc = NMI_MENU_LOCATION_MAIN_MENU;
it->lbl = strdup("nickel-menu-inject");
it->arg = strdup("See KOBOeReader/.add/nmi/doc for instructions on how to customize this menu.");
it->act = nmi_action_dbgerror;
nmi_config_push_menu_item(&cfg, it);
}
for (nmi_config_t *cur = cfg; cur; cur = cur->next)
if (cur->type == NMI_CONFIG_TYPE_MENU_ITEM)
NMI_LOG("cfg(NMI_CONFIG_TYPE_MENU_ITEM) : %d:%s:%p:%s", cur->value.menu_item->loc, cur->value.menu_item->lbl, cur->value.menu_item->act, cur->value.menu_item->arg);
// return the head of the list
NMI_RETURN_OK(cfg);
#undef NMI_ERR_RET
}
nmi_menu_item_t **nmi_config_get_menu(nmi_config_t *cfg, size_t *n_out) {
*n_out = 0;
for (nmi_config_t *cur = cfg; cur; cur = cfg->next)
for (nmi_config_t *cur = cfg; cur; cur = cur->next)
if (cur->type == NMI_CONFIG_TYPE_MENU_ITEM)
(*n_out)++;
@@ -41,7 +183,7 @@ nmi_menu_item_t **nmi_config_get_menu(nmi_config_t *cfg, size_t *n_out) {
return NULL;
nmi_menu_item_t **tmp = it;
for (nmi_config_t *cur = cfg; cur; cur = cfg->next)
for (nmi_config_t *cur = cfg; cur; cur = cur->next)
if (cur->type == NMI_CONFIG_TYPE_MENU_ITEM)
*(tmp++) = cur->value.menu_item;

9
src/init.c
View File

@@ -8,6 +8,7 @@
#include <unistd.h>
#include "action_c.h"
#include "action_cc.h"
#include "config.h"
#include "failsafe.h"
#include "menu.h"
@@ -44,10 +45,10 @@ __attribute__((constructor)) void nmi_init() {
if (!(cfg = nmi_config_parse(&err)) && err) {
NMI_LOG("error: could not parse config: %s, creating error item in main menu instead", err);
items_n = 1;
items = calloc(items_n, sizeof(nmi_menu_item_t*));
*items = calloc(items_n, sizeof(nmi_menu_item_t));
items_n = 1;
items = calloc(items_n, sizeof(nmi_menu_item_t*));
items[0] = calloc(1, sizeof(nmi_menu_item_t));
items[0]->loc = NMI_MENU_LOCATION_MAIN_MENU;
items[0]->lbl = strdup("Config Error");
items[0]->arg = strdup(err);