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167dfe9)
overlayfs may have fairly long lines so we use getline to allocate a
buffer dynamically. The buffer will be allocated on first use, expand as
needed, but will never be free'ed.
Downstream bug: http://bugs.alpinelinux.org/issues/5703
Signed-off-by: Natanael Copa <ncopa@alpinelinux.org>
#include <mntent.h>
#include <errno.h>
#include <mntent.h>
#include <errno.h>
+static char *internal_buf;
+static size_t internal_bufsize;
+
+#define SENTINEL (char *)&internal_buf
+
FILE *setmntent(const char *name, const char *mode)
{
return fopen(name, mode);
FILE *setmntent(const char *name, const char *mode)
{
return fopen(name, mode);
struct mntent *getmntent_r(FILE *f, struct mntent *mnt, char *linebuf, int buflen)
{
struct mntent *getmntent_r(FILE *f, struct mntent *mnt, char *linebuf, int buflen)
{
+ int cnt, n[8], use_internal = (linebuf == SENTINEL);
mnt->mnt_freq = 0;
mnt->mnt_passno = 0;
do {
mnt->mnt_freq = 0;
mnt->mnt_passno = 0;
do {
- fgets(linebuf, buflen, f);
+ if (use_internal) {
+ getline(&internal_buf, &internal_bufsize, f);
+ linebuf = internal_buf;
+ } else {
+ fgets(linebuf, buflen, f);
+ }
if (feof(f) || ferror(f)) return 0;
if (!strchr(linebuf, '\n')) {
fscanf(f, "%*[^\n]%*[\n]");
if (feof(f) || ferror(f)) return 0;
if (!strchr(linebuf, '\n')) {
fscanf(f, "%*[^\n]%*[\n]");
struct mntent *getmntent(FILE *f)
{
struct mntent *getmntent(FILE *f)
{
- static char linebuf[256];
static struct mntent mnt;
static struct mntent mnt;
- return getmntent_r(f, &mnt, linebuf, sizeof linebuf);
+ return getmntent_r(f, &mnt, SENTINEL, 0);
}
int addmntent(FILE *f, const struct mntent *mnt)
}
int addmntent(FILE *f, const struct mntent *mnt)