diff options
Diffstat (limited to 'locale')
| -rw-r--r-- | locale/programs/locarchive.c | 74 |
1 files changed, 32 insertions, 42 deletions
diff --git a/locale/programs/locarchive.c b/locale/programs/locarchive.c index 770a731a61..5069265170 100644 --- a/locale/programs/locarchive.c +++ b/locale/programs/locarchive.c @@ -74,6 +74,29 @@ static const char *locnames[] = /* Size of the reserved address space area. */ #define RESERVE_MMAP_SIZE 512 * 1024 * 1024 +/* To prepare for enlargements of the mmaped area reserve some address + space. On some machines, being a file mapping rather than an anonymous + mapping affects the address selection. So do this mapping from the + actual file, even though it's only a dummy to reserve address space. */ +static void * +prepare_address_space (int fd, size_t total, size_t *reserved, int *xflags) +{ + if (total < RESERVE_MMAP_SIZE) + { + void *p = mmap64 (NULL, RESERVE_MMAP_SIZE, PROT_NONE, MAP_SHARED, fd, 0); + if (p != MAP_FAILED) + { + *reserved = RESERVE_MMAP_SIZE; + *xflags = MAP_FIXED; + return p; + } + } + + *reserved = total; + *xflags = 0; + return NULL; +} + static void create_archive (const char *archivefname, struct locarhandle *ah) @@ -81,7 +104,6 @@ create_archive (const char *archivefname, struct locarhandle *ah) int fd; char fname[strlen (archivefname) + sizeof (".XXXXXX")]; struct locarhead head; - void *p; size_t total; strcpy (stpcpy (fname, archivefname), ".XXXXXX"); @@ -129,19 +151,9 @@ create_archive (const char *archivefname, struct locarhandle *ah) error (EXIT_FAILURE, errval, _("cannot resize archive file")); } - /* To prepare for enlargements of the mmaped area reserve some - address space. */ - size_t reserved = RESERVE_MMAP_SIZE; - int xflags = 0; - if (total < reserved - && ((p = mmap64 (NULL, reserved, PROT_NONE, MAP_PRIVATE | MAP_ANON, - -1, 0)) != MAP_FAILED)) - xflags = MAP_FIXED; - else - { - p = NULL; - reserved = total; - } + size_t reserved; + int xflags; + void *p = prepare_address_space (fd, total, &reserved, &xflags); /* Map the header and all the administration data structures. */ p = mmap64 (p, total, PROT_READ | PROT_WRITE, MAP_SHARED | xflags, fd, 0); @@ -297,7 +309,6 @@ enlarge_archive (struct locarhandle *ah, const struct locarhead *head) int fd; struct locarhead newhead; size_t total; - void *p; unsigned int cnt, loccnt; struct namehashent *oldnamehashtab; struct locarhandle new_ah; @@ -390,19 +401,9 @@ enlarge_archive (struct locarhandle *ah, const struct locarhead *head) error (EXIT_FAILURE, errval, _("cannot resize archive file")); } - /* To prepare for enlargements of the mmaped area reserve some - address space. */ - size_t reserved = RESERVE_MMAP_SIZE; - int xflags = 0; - if (total < reserved - && ((p = mmap64 (NULL, reserved, PROT_NONE, MAP_PRIVATE | MAP_ANON, - -1, 0)) != MAP_FAILED)) - xflags = MAP_FIXED; - else - { - p = NULL; - reserved = total; - } + size_t reserved; + int xflags; + void *p = prepare_address_space (fd, total, &reserved, &xflags); /* Map the header and all the administration data structures. */ p = mmap64 (p, total, PROT_READ | PROT_WRITE, MAP_SHARED | xflags, fd, 0); @@ -605,20 +606,9 @@ open_archive (struct locarhandle *ah, bool readonly) ah->fd = fd; ah->mmaped = st.st_size; - /* To prepare for enlargements of the mmaped area reserve some - address space. */ - size_t reserved = RESERVE_MMAP_SIZE; - int xflags = 0; - void *p; - if (st.st_size < reserved - && ((p = mmap64 (NULL, reserved, PROT_NONE, MAP_PRIVATE | MAP_ANON, - -1, 0)) != MAP_FAILED)) - xflags = MAP_FIXED; - else - { - p = NULL; - reserved = st.st_size; - } + size_t reserved; + int xflags; + void *p = prepare_address_space (fd, st.st_size, &reserved, &xflags); /* Map the entire file. We might need to compare the category data in the file with the newly added data. */ |