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am eb370aa3: Merge "Make bionic look in /data/misc for tzdata updates."

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* commit 'eb370aa31dd549ad7a7a2044dedab1140a7aeda9':
  Make bionic look in /data/misc for tzdata updates.
This commit is contained in:
Elliott Hughes 2012-10-22 11:53:22 -07:00 committed by Android Git Automerger
commit 417834b17e
1 changed files with 31 additions and 22 deletions
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53
libc/tzcode/localtime.c
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@ -37,11 +37,6 @@ static char elsieid[] = "@(#)localtime.c 8.3";
#define TZ_ABBR_ERR_CHAR '_'
#endif /* !defined TZ_ABBR_ERR_CHAR */
#define TZDATA_PATH "/system/usr/share/zoneinfo/tzdata"
#define NAMELEN 40
#define INTLEN 4
#define READLEN (NAMELEN + 3 * INTLEN)
/*
** SunOS 4.1.1 headers lack O_BINARY.
*/
@ -2193,14 +2188,15 @@ time_t t;
#endif /* defined STD_INSPIRED */
#include <assert.h>
#include <stdint.h>
#include <arpa/inet.h> // For ntohl(3).
static int __bionic_open_tzdata(const char* olson_id, int* data_size) {
int fd = TEMP_FAILURE_RETRY(open(TZDATA_PATH, OPEN_MODE));
static int __bionic_open_tzdata_path(const char* path, const char* olson_id, int* data_size) {
int fd = TEMP_FAILURE_RETRY(open(path, OPEN_MODE));
if (fd == -1) {
fprintf(stderr, "__bionic_open_tzdata: could not open \"%s\": %s\n", TZDATA_PATH, strerror(errno));
return -1;
XLOG(("%s: could not open \"%s\": %s\n", __FUNCTION__, path, strerror(errno)));
return -2; // Distinguish failure to find any data from failure to find a specific id.
}
// byte[12] tzdata_version -- "tzdata2012f\0"
@ -2216,18 +2212,18 @@ static int __bionic_open_tzdata(const char* olson_id, int* data_size) {
int32_t zonetab_offset;
} header;
if (TEMP_FAILURE_RETRY(read(fd, &header, sizeof(header))) != sizeof(header)) {
fprintf(stderr, "__bionic_open_tzdata: could not read header: %s\n", strerror(errno));
fprintf(stderr, "%s: could not read header: %s\n", __FUNCTION__, strerror(errno));
close(fd);
return -1;
}
if (strncmp(header.tzdata_version, "tzdata", 6) != 0 || header.tzdata_version[11] != 0) {
fprintf(stderr, "__bionic_open_tzdata: bad magic: %s\n", header.tzdata_version);
fprintf(stderr, "%s: bad magic: %s\n", __FUNCTION__, header.tzdata_version);
close(fd);
return -1;
}
if (ntohl(header.file_format_version) != 1) {
fprintf(stderr, "__bionic_open_tzdata: bad file format version: %d\n", header.file_format_version);
fprintf(stderr, "%s: bad file format version: %d\n", __FUNCTION__, header.file_format_version);
close(fd);
return -1;
}
@ -2240,37 +2236,50 @@ static int __bionic_open_tzdata(const char* olson_id, int* data_size) {
#endif
if (TEMP_FAILURE_RETRY(lseek(fd, ntohl(header.index_offset), SEEK_SET)) == -1) {
fprintf(stderr, "__bionic_open_tzdata: couldn't seek to index: %s\n", strerror(errno));
fprintf(stderr, "%s: couldn't seek to index: %s\n", __FUNCTION__, strerror(errno));
close(fd);
return -1;
}
off_t specific_zone_offset = -1;
unsigned char buf[READLEN];
while (read(fd, buf, sizeof(buf)) == sizeof(buf)) {
char this_id[NAMELEN + 1];
memcpy(this_id, buf, NAMELEN);
this_id[NAMELEN] = '\0';
static const size_t NAME_LENGTH = 40;
unsigned char buf[NAME_LENGTH + 3 * sizeof(int32_t)];
while (TEMP_FAILURE_RETRY(read(fd, buf, sizeof(buf))) == (ssize_t) sizeof(buf)) {
char this_id[NAME_LENGTH + 1];
memcpy(this_id, buf, NAME_LENGTH);
this_id[NAME_LENGTH] = '\0';
if (strcmp(this_id, olson_id) == 0) {
specific_zone_offset = toint(buf + NAMELEN) + ntohl(header.data_offset);
*data_size = toint(buf + NAMELEN + INTLEN);
specific_zone_offset = toint(buf + NAME_LENGTH) + ntohl(header.data_offset);
*data_size = toint(buf + NAME_LENGTH + sizeof(int32_t));
break;
}
}
if (specific_zone_offset == -1) {
XLOG(("__bionic_open_tzdata: couldn't find zone \"%s\"\n", olson_id));
XLOG(("%s: couldn't find zone \"%s\"\n", __FUNCTION__, olson_id));
close(fd);
return -1;
}
if (TEMP_FAILURE_RETRY(lseek(fd, specific_zone_offset, SEEK_SET)) == -1) {
fprintf(stderr, "__bionic_open_tzdata: could not seek to %ld: %s\n", specific_zone_offset, strerror(errno));
fprintf(stderr, "%s: could not seek to %ld: %s\n", __FUNCTION__, specific_zone_offset, strerror(errno));
close(fd);
return -1;
}
return fd;
}
static int __bionic_open_tzdata(const char* olson_id, int* data_size) {
// TODO: use $ANDROID_DATA and $ANDROID_ROOT like libcore, to support bionic on the host.
int fd = __bionic_open_tzdata_path("/data/misc/zoneinfo/tzdata", olson_id, data_size);
if (fd < 0) {
fd = __bionic_open_tzdata_path("/system/usr/share/zoneinfo/tzdata", olson_id, data_size);
if (fd == -2) {
__assert2(__FILE__, __LINE__, __func__, "couldn't find any tzdata!");
}
}
return fd;
}