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libshare: nfs: share nfs_copy_entries()

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Reviewed-by: Don Brady <don.brady@delphix.com>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: John Kennedy <john.kennedy@delphix.com>
Signed-off-by: Ahelenia Ziemiańska <nabijaczleweli@nabijaczleweli.xyz>
Closes #12067
This commit is contained in:
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2021-05-17 19:56:48 +02:00
committed by Brian Behlendorf
parent c53f2e9b50
commit 4e225e7316
4 changed files with 52 additions and 128 deletions
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lib/libshare/os/freebsd/nfs.c
-72
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@@ -54,42 +54,6 @@ __FBSDID("$FreeBSD$");
static sa_fstype_t *nfs_fstype;
/*
* Read one line from a file. Skip comments, empty lines and a line with a
* mountpoint specified in the 'skip' argument.
*
* NOTE: This function returns a static buffer and thus is not thread-safe.
*/
static char *
zgetline(FILE *fd, const char *skip)
{
static char line[MAXLINESIZE];
size_t len, skiplen = 0;
char *s, last;
if (skip != NULL)
skiplen = strlen(skip);
for (;;) {
s = fgets(line, sizeof (line), fd);
if (s == NULL)
return (NULL);
/* Skip empty lines and comments. */
if (line[0] == '\n' || line[0] == '#')
continue;
len = strlen(line);
if (line[len - 1] == '\n')
line[len - 1] = '\0';
last = line[skiplen];
/* Skip the given mountpoint. */
if (skip != NULL && strncmp(skip, line, skiplen) == 0 &&
(last == '\t' || last == ' ' || last == '\0')) {
continue;
}
break;
}
return (line);
}
/*
* This function translate options to a format acceptable by exports(5), eg.
*
@@ -143,42 +107,6 @@ translate_opts(const char *shareopts)
return (newopts);
}
/*
* This function copies all entries from the exports file to newfp,
* omitting any entries for the specified mountpoint.
*/
int
nfs_copy_entries(FILE *newfp, const char *mountpoint)
{
int error = SA_OK;
char *line;
FILE *oldfp = fopen(ZFS_EXPORTS_FILE, "re");
fputs(FILE_HEADER, newfp);
/*
* The ZFS_EXPORTS_FILE may not exist yet. If that's the
* case then just write out the new file.
*/
if (oldfp != NULL) {
while ((line = zgetline(oldfp, mountpoint)) != NULL)
fprintf(newfp, "%s\n", line);
if (ferror(oldfp) != 0) {
error = ferror(oldfp);
}
if (fclose(oldfp) != 0) {
fprintf(stderr, "Unable to close file %s: %s\n",
ZFS_EXPORTS_FILE, strerror(errno));
error = error != 0 ? error : SA_SYSTEM_ERR;
}
}
if (error == SA_OK && ferror(newfp) != 0)
error = ferror(newfp);
return (error);
}
static int
nfs_enable_share_impl(sa_share_impl_t impl_share, FILE *tmpfile)
{