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Large file support on 32-bit systems

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* Add AC_SYS_LARGEFILE to configure.ac

* Replace fseek with fseeko
This commit is contained in:
Evan Miller
2020-11-07 11:40:44 -05:00
parent 06234afc1a
commit 38ce7db045
3 changed files with 7 additions and 4 deletions
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3
configure.ac
View File

@@ -45,6 +45,9 @@ AC_TYPE_SIZE_T
AM_ICONV
AM_GCC_ATTRIBUTE_ALIAS
dnl Enable large files on 32-bit systems
AC_SYS_LARGEFILE
dnl no optional stuff by default
OPTDIRS=""

4
src/libmdb/file.c
View File

@@ -394,7 +394,7 @@ static ssize_t _mdb_read_pg(MdbHandle *mdb, void *pg_buf, unsigned long pg)
ssize_t len;
off_t offset = pg * mdb->fmt->pg_size;
if (fseek(mdb->f->stream, 0, SEEK_END) == -1) {
if (fseeko(mdb->f->stream, 0, SEEK_END) == -1) {
fprintf(stderr, "Unable to seek to end of file\n");
return 0;
}
@@ -405,7 +405,7 @@ static ssize_t _mdb_read_pg(MdbHandle *mdb, void *pg_buf, unsigned long pg)
if (mdb->stats && mdb->stats->collect)
mdb->stats->pg_reads++;
if (fseek(mdb->f->stream, offset, SEEK_SET) == -1) {
if (fseeko(mdb->f->stream, offset, SEEK_SET) == -1) {
fprintf(stderr, "Unable to seek to page %lu\n", pg);
return 0;
}

4
src/libmdb/write.c
View File

@@ -72,13 +72,13 @@ mdb_write_pg(MdbHandle *mdb, unsigned long pg)
ssize_t len;
off_t offset = pg * mdb->fmt->pg_size;
fseek(mdb->f->stream, 0, SEEK_END);
fseeko(mdb->f->stream, 0, SEEK_END);
/* is page beyond current size + 1 ? */
if (ftello(mdb->f->stream) < offset + mdb->fmt->pg_size) {
fprintf(stderr,"offset %" PRIu64 " is beyond EOF\n",(uint64_t)offset);
return 0;
}
fseek(mdb->f->stream, offset, SEEK_SET);
fseeko(mdb->f->stream, offset, SEEK_SET);
len = fwrite(mdb->pg_buf, mdb->fmt->pg_size, 1, mdb->f->stream);
if (ferror(mdb->f->stream)) {
perror("write");