initial commit

include/acpi.c

@@ -0,0 +1,115 @@
+#include <stdlib.h>
+#include <string.h>
+#include <sys/socket.h>
+#include <sys/un.h>
+#include <unistd.h>
+#include <errno.h>
+
+#include "log.h"
+#include "acpi.h"
+#include "utils.h"
+
+/**
+ * @brief parse output of acpid
+ *
+ * @param str input from acpi socket
+ * @param out the parsed version of it
+ * @return 0 on success
+ */
+int
+acpi_parse(char *str, char **out)
+{
+  int i, section_num, last_section_pos;
+  size_t section_size;
+
+  if (strlen(str) <= 1) {
+    log_warn("failed to parse acpid input string: it doesn't exist!");
+    return 1;
+  }
+
+  for (last_section_pos = section_num = i = 0; i <= strlen(str); i++) {
+    if (str[i] != ' ' && str[i] != '\n' && str[i] != '\0') {
+      continue;
+    }
+
+    /* grab correct information of the current section */
+    section_size = i - last_section_pos;
+
+    /* copy over the data into the new buffer */
+    out[section_num] = get_substring(str, last_section_pos, section_size);
+
+    /* set the last_section_pos for the next section */
+    last_section_pos = i + 1;
+    section_num++;
+  }
+
+  return 0;
+}
+
+/**
+ * @brief cleanup the results of acpi_parse
+ *
+ * @param out the pointer to the output from acpi_parse
+ */
+void
+acpi_clean_parse(char *out[4])
+{
+  int i;
+
+  for (i = 0; i < 4; i++) {
+    if (out[i]) {
+      free(out[i]);
+    }
+  }
+}
+
+/**
+ * @brief create a new acpi socket connection
+ *
+ * @param socket_file path to the socket file
+ * @return the socket fd
+ */
+int
+acpi_create_socket(char *socket_file)
+{
+  int sock_fd;
+  struct sockaddr_un addr = { 0 };
+
+  /* create a new socket connection */
+  sock_fd = socket(AF_UNIX, SOCK_STREAM | SOCK_CLOEXEC, 0);
+  if (sock_fd < 0) {
+    log_fatal("failed to create a new socket: %s", strerror(errno));
+    return 1;
+  }
+
+  /* setup the socket */
+  addr.sun_family = AF_UNIX;
+  strncpy(addr.sun_path, socket_file, strlen(socket_file) + 1);
+
+  /* connect */
+  if (connect(sock_fd, (struct sockaddr *)&addr, sizeof(addr)) < 0) {
+    if (close(sock_fd) < 0) {
+      log_fatal("failed to close socket close: %s", strerror(errno));
+    }
+    log_fatal("failed to connect to the socket: %s", strerror(errno));
+    return 1;
+  }
+
+  return sock_fd;
+}
+
+/**
+ * @brief close the socket connection
+ *
+ * @param sockfd the sockets fd
+ * @return 0 on success 1 on error
+ */
+int
+acpi_close_socket(int sockfd) {
+  if (close(sockfd) < 0) {
+    log_fatal("failed to close socket: %s", strerror(errno));
+    return 1;
+  }
+
+  return 0;
+}