new: implement check and update functions

examples/Makefile

@@ -1,6 +1,6 @@
 CC = gcc
 
-all: ../dist/client_install ../dist/client_remove ../dist/server
+all: ../dist/client_install ../dist/client_remove ../dist/client_update ../dist/client_check ../dist/client_list ../dist/server
 
 ../dist/client_install: client/install.c client/*.h ../dist/libmp.so
 	mkdir -pv ../dist
@@ -10,6 +10,18 @@ all: ../dist/client_install ../dist/client_remove ../dist/server
 	mkdir -pv ../dist
 	$(CC) -L../dist $< -lmp -o $@
 
+../dist/client_update: client/update.c client/*.h ../dist/libmp.so
+	mkdir -pv ../dist
+	$(CC) -L../dist $< -lmp -o $@
+
+../dist/client_check: client/check.c client/*.h ../dist/libmp.so
+	mkdir -pv ../dist
+	$(CC) -L../dist $< -lmp -o $@
+
+../dist/client_list: client/list.c client/*.h ../dist/libmp.so
+	mkdir -pv ../dist
+	$(CC) -L../dist $< -lmp -o $@
+
 ../dist/server: server/*.c ../dist/libmp.so
 	mkdir -pv ../dist
 	$(CC) -L../dist $< -lmp -o $@

examples/client/check.c

@@ -0,0 +1,45 @@
+#include "../../include/all.h"
+#include "./common.h"
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+int main(int argc, char *argv[]) {
+  int      ret = EXIT_FAILURE;
+  lm_pkg_t pkg;
+  lm_ctx_t ctx;
+
+  lm_package_init(&pkg);
+
+  if (argc != 2) {
+    printf("usage: %s <package name>\n", argv[0]);
+    return ret;
+  }
+
+  lm_ctx_init(&ctx);
+
+  if (!lm_ctx_set_data(&ctx, DATA_DIR)) {
+    printf("failed to set data dir: %s (%d)\n", lm_strerror(), lm_error());
+    goto end;
+  }
+
+  if (!lm_ctx_database_find(&ctx, &pkg, argv[1], NULL)) {
+    printf("failed to find package: %s (%d)\n", lm_strerror(), lm_error());
+    goto end;
+  }
+
+  printf("checking %s (%s)...\n", pkg.name, pkg.version);
+
+  if (!lm_ctx_check(&ctx, &pkg, NULL, NULL)) {
+    printf("failed to verify the package: %s (%d)\n", lm_strerror(), lm_error());
+    goto end;
+  }
+
+  ret = EXIT_SUCCESS;
+
+end:
+  lm_package_free(&pkg);
+  lm_ctx_free(&ctx);
+  return ret;
+}

examples/client/list.c

@@ -0,0 +1,28 @@
+#include "../../include/all.h"
+#include "./common.h"
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+int main(int argc, char *argv[]) {
+  lm_ctx_t ctx;
+  lm_pkg_t pkg;
+  int      ret = EXIT_FAILURE;
+
+  lm_ctx_init(&ctx);
+
+  if (!lm_ctx_set_data(&ctx, DATA_DIR)) {
+    printf("failed to set data dir: %s (%d)\n", lm_strerror(), lm_error());
+    goto end;
+  }
+
+  printf("listing installed packages:\n");
+
+  while (lm_ctx_database_next(&ctx, &pkg))
+    printf("%s (%s)\n", pkg.name, pkg.version);
+
+end:
+  lm_ctx_database_next_free(&ctx, &pkg);
+  return ret;
+}

examples/client/update.c

@@ -0,0 +1,60 @@
+#include "../../include/all.h"
+#include "./common.h"
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+int main(int argc, char *argv[]) {
+  lm_ctx_update_list_t *list = NULL;
+  int                   ret  = EXIT_FAILURE;
+  lm_pkg_t              pkg, *cur = NULL;
+  lm_ctx_t              ctx;
+
+  if (!mkdir_ifnot(ROOT_DIR)) {
+    printf("failed to create root dir: %s\n", ROOT_DIR);
+    return ret;
+  }
+
+  lm_ctx_init(&ctx);
+
+  if (!lm_ctx_set_data(&ctx, DATA_DIR)) {
+    printf("failed to set data dir: %s (%d)\n", lm_strerror(), lm_error());
+    goto end;
+  }
+
+  if (!lm_ctx_set_temp(&ctx, TEMP_DIR)) {
+    printf("failed to set temp dir: %s (%d)\n", lm_strerror(), lm_error());
+    goto end;
+  }
+
+  if (!lm_ctx_set_root(&ctx, ROOT_DIR)) {
+    printf("failed to set root dir: %s (%d)\n", lm_strerror(), lm_error());
+    goto end;
+  }
+
+  if ((list = lm_ctx_update_list(&ctx)) == NULL) {
+    printf("failed to get update list: %s (%d)", lm_strerror(), lm_error());
+    goto end;
+  }
+
+  if (list->count == 0) {
+    printf("all packages are up-to-date\n");
+    goto end;
+  }
+
+  while ((cur = lm_ctx_update_list_next(list)) != NULL) {
+    printf("updating %s (%s)...\n", cur->name, cur->version);
+    if (!lm_ctx_update(&ctx, cur, NULL, NULL)) {
+      printf("failed to update package: %s\n", lm_strerror());
+      goto end;
+    }
+  }
+
+  ret = EXIT_SUCCESS;
+
+end:
+  lm_ctx_update_list_free(list);
+  lm_ctx_free(&ctx);
+  return ret;
+}