mdw@git.distorted.org.uk Git - termux-packages/blob - packages/glib/glib-gtimezone.c.patch

   1 diff -u -r ../glib-2.48.2/glib/gtimezone.c ./glib/gtimezone.c
   2 --- ../glib-2.48.2/glib/gtimezone.c     2016-08-17 12:07:29.000000000 -0400
   3 +++ ./glib/gtimezone.c  2016-09-12 16:52:41.864974630 -0400
   4 @@ -43,6 +43,11 @@
   5  #include <windows.h>
   6  #endif
   7
   8 +#ifdef __ANDROID__
   9 +#include <fcntl.h>
  10 +#include <sys/system_properties.h>
  11 +#endif
  12 +
  13  /**
  14   * SECTION:timezone
  15   * @title: GTimeZone
  16 @@ -396,6 +400,75 @@
  17  static GBytes*
  18  zone_info_unix (const gchar *identifier)
  19  {
  20 +#ifdef __ANDROID__
  21 +  /* Android does not have /etc/localtime but uses a system property for the
  22 +     the current timezone. There are no files under /usr/share/zoneinfo,
  23 +     instead a single /system/usr/share/zoneinfo/tzdata which are all zoneinfo
  24 +     files compiled together with the following tool:
  25 +     https://android.googlesource.com/platform/external/icu/+/master/tools/ZoneCompactor.java */
  26 +  struct tzdata_header {
  27 +    char version[12];
  28 +    uint32_t index_offset, data_offset, zonetab_offset;
  29 +  } __attribute__((packed)) header;
  30 +
  31 +  struct tzdata_index_entry {
  32 +    char name[40];
  33 +    uint32_t offset, length, unused;
  34 +  } __attribute__((packed)) entry;
  35 +
  36 +  if (identifier == NULL) {
  37 +    char sys_timezone[PROP_VALUE_MAX];
  38 +    if (__system_property_get("persist.sys.timezone", sys_timezone) < 1) {
  39 +      g_warning("__system_property_get(\"persist.sys.timezone\") failed\n");
  40 +      return NULL;
  41 +    }
  42 +    identifier = sys_timezone;
  43 +  }
  44 +  if (identifier != NULL) {
  45 +    int tzdata_fd = open("/system/usr/share/zoneinfo/tzdata", O_RDONLY);
  46 +    if (tzdata_fd < 0) {
  47 +      g_warning("Failed opening tzdata");
  48 +      return NULL;
  49 +    }
  50 +    if (read(tzdata_fd, &header, sizeof(header)) < (ssize_t) sizeof(header)) {
  51 +      g_warning("Failed reading tzdata header");
  52 +      goto error;
  53 +    }
  54 +    header.index_offset = htonl(header.index_offset);
  55 +    header.data_offset = htonl(header.data_offset);
  56 +
  57 +    uint32_t current_offset = header.index_offset;
  58 +    while (current_offset < header.data_offset) {
  59 +      if (read(tzdata_fd, &entry, sizeof(entry)) < (ssize_t) sizeof(entry)) {
  60 +        g_warning("Failed reading tzdata index entry");
  61 +        goto error;
  62 +      }
  63 +      if (strcmp(entry.name, identifier) == 0) {
  64 +        entry.offset = htonl(entry.offset);
  65 +        entry.length = htonl(entry.length);
  66 +        if (entry.length == 0) {
  67 +          g_warning("Invalid tzdata entry with length zero");
  68 +          goto error;
  69 +        }
  70 +        if (lseek(tzdata_fd, header.data_offset + entry.offset, SEEK_SET) == -1) {
  71 +          g_warning("Failed seeking to tzdata entry");
  72 +          goto error;
  73 +        }
  74 +        guint8* data = g_malloc(entry.length);
  75 +        if (read(tzdata_fd, data, entry.length) < entry.length) {
  76 +          g_warning("Failed reading tzdata entry");
  77 +          g_free(data);
  78 +          goto error;
  79 +        }
  80 +        close(tzdata_fd);
  81 +        return g_bytes_new_take(data, entry.length);
  82 +      }
  83 +    }
  84 +error:
  85 +    close(tzdata_fd);
  86 +  }
  87 +  return NULL;
  88 +#else
  89    gchar *filename;
  90    GMappedFile *file = NULL;
  91    GBytes *zoneinfo = NULL;
  92 @@ -434,6 +497,7 @@
  93      }
  94    g_free (filename);
  95    return zoneinfo;
  96 +#endif
  97  }
  98
  99  static void