From cfe5e3905201349e9cf3f95d52ff4bd100bde37d Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 14 Apr 2024 21:10:49 +0200 Subject: Adding upstream version 2.39.3. Signed-off-by: Daniel Baumann --- sys-utils/swapon-common.c | 117 ++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 117 insertions(+) create mode 100644 sys-utils/swapon-common.c (limited to 'sys-utils/swapon-common.c') diff --git a/sys-utils/swapon-common.c b/sys-utils/swapon-common.c new file mode 100644 index 0000000..bffedec --- /dev/null +++ b/sys-utils/swapon-common.c @@ -0,0 +1,117 @@ + +#include "c.h" +#include "nls.h" +#include "xalloc.h" + +#include "swapon-common.h" + +/* + * content of /proc/swaps and /etc/fstab + */ +static struct libmnt_table *swaps, *fstab; + +struct libmnt_cache *mntcache; + +static int table_parser_errcb(struct libmnt_table *tb __attribute__((__unused__)), + const char *filename, int line) +{ + if (filename) + warnx(_("%s: parse error at line %d -- ignored"), filename, line); + return 1; +} + +struct libmnt_table *get_fstab(const char *filename) +{ + if (!fstab) { + fstab = mnt_new_table(); + if (!fstab) + return NULL; + mnt_table_set_parser_errcb(fstab, table_parser_errcb); + mnt_table_set_cache(fstab, mntcache); + if (mnt_table_parse_fstab(fstab, filename) != 0) + return NULL; + } + + return fstab; +} + +struct libmnt_table *get_swaps(void) +{ + if (!swaps) { + swaps = mnt_new_table(); + if (!swaps) + return NULL; + mnt_table_set_cache(swaps, mntcache); + mnt_table_set_parser_errcb(swaps, table_parser_errcb); + if (mnt_table_parse_swaps(swaps, NULL) != 0) + return NULL; + } + + return swaps; +} + +void free_tables(void) +{ + mnt_unref_table(swaps); + mnt_unref_table(fstab); +} + +int match_swap(struct libmnt_fs *fs, void *data __attribute__((unused))) +{ + return fs && mnt_fs_is_swaparea(fs); +} + +int is_active_swap(const char *filename) +{ + struct libmnt_table *st = get_swaps(); + return st && mnt_table_find_source(st, filename, MNT_ITER_BACKWARD); +} + + +int cannot_find(const char *special) +{ + warnx(_("cannot find the device for %s"), special); + return -1; +} + +/* + * Lists with -L and -U option + */ +static const char **llist; +static size_t llct; +static const char **ulist; +static size_t ulct; + + +void add_label(const char *label) +{ + llist = xrealloc(llist, (++llct) * sizeof(char *)); + llist[llct - 1] = label; +} + +const char *get_label(size_t i) +{ + return i < llct ? llist[i] : NULL; +} + +size_t numof_labels(void) +{ + return llct; +} + +void add_uuid(const char *uuid) +{ + ulist = xrealloc(ulist, (++ulct) * sizeof(char *)); + ulist[ulct - 1] = uuid; +} + +const char *get_uuid(size_t i) +{ + return i < ulct ? ulist[i] : NULL; +} + +size_t numof_uuids(void) +{ + return ulct; +} + -- cgit v1.2.3