/*
* Read and parse the next line from {fs,m}tab or mountinfo
*/
static int mnt_table_parse_next(struct libmnt_table *tb, FILE *f, struct libmnt_fs *fs,
const char *filename, int *nlines)
{
char buf[BUFSIZ];
char *s;
int rc;
assert(tb);
assert(f);
assert(fs);
/* read the next non-blank non-comment line */
next_line:
do {
if (fgets(buf, sizeof(buf), f) == NULL)
return -EINVAL;
++*nlines;
s = index (buf, '\n');
if (!s) {
/* Missing final newline? Otherwise extremely */
/* long line - assume file was corrupted */
if (feof(f)) {
DBG(TAB, mnt_debug_h(tb,
"%s: no final newline", filename));
s = index (buf, '\0');
} else {
DBG(TAB, mnt_debug_h(tb,
"%s:%d: missing newline at line",
filename, *nlines));
goto err;
}
}
*s = '\0';
if (--s >= buf && *s == '\r')
*s = '\0';
s = skip_spaces(buf);
} while (*s == '\0' || *s == '#');
if (tb->fmt == MNT_FMT_GUESS) {
tb->fmt = guess_table_format(s);
if (tb->fmt == MNT_FMT_SWAPS)
goto next_line; /* skip swap header */
}
switch (tb->fmt) {
case MNT_FMT_FSTAB:
rc = mnt_parse_table_line(fs, s);
break;
case MNT_FMT_MOUNTINFO:
rc = mnt_parse_mountinfo_line(fs, s);
break;
case MNT_FMT_UTAB:
rc = mnt_parse_utab_line(fs, s);
break;
case MNT_FMT_SWAPS:
if (strncmp(s, "Filename\t", 9) == 0)
goto next_line; /* skip swap header */
rc = mnt_parse_swaps_line(fs, s);
break;
default:
rc = -1; /* unknown format */
break;
}
if (rc == 0)
return 0;
err:
DBG(TAB, mnt_debug_h(tb, "%s:%d: %s parse error", filename, *nlines,
tb->fmt == MNT_FMT_MOUNTINFO ? "mountinfo" :
tb->fmt == MNT_FMT_SWAPS ? "swaps" :
tb->fmt == MNT_FMT_FSTAB ? "tab" : "utab"));
/* by default all errors are recoverable, otherwise behavior depends on
* errcb() function. See mnt_table_set_parser_errcb().
*/
return tb->errcb ? tb->errcb(tb, filename, *nlines) : 1;
}
/*
* Read and parse the next line from {fs,m}tab or mountinfo
*/
static int mnt_table_parse_next(struct libmnt_parser *pa,
struct libmnt_table *tb,
struct libmnt_fs *fs)
{
char *s;
int rc;
assert(tb);
assert(pa);
assert(fs);
/* read the next non-blank non-comment line */
next_line:
do {
if (getline(&pa->buf, &pa->bufsiz, pa->f) < 0)
return -EINVAL;
pa->line++;
s = strchr(pa->buf, '\n');
if (!s) {
/* Missing final newline? Otherwise an extremely */
/* long line - assume file was corrupted */
if (feof(pa->f)) {
DBG(TAB, ul_debugobj(tb,
"%s: no final newline", pa->filename));
s = strchr(pa->buf, '\0');
} else {
DBG(TAB, ul_debugobj(tb,
"%s:%zu: missing newline at line",
pa->filename, pa->line));
goto err;
}
}
/* comments parser */
if (tb->comms
&& (tb->fmt == MNT_FMT_GUESS || tb->fmt == MNT_FMT_FSTAB)
&& is_comment_line(pa->buf)) {
do {
rc = append_comment(tb, fs, pa->buf, feof(pa->f));
if (!rc)
rc = next_comment_line(pa, &s);
} while (rc == 0);
if (rc == 1 && feof(pa->f))
rc = append_comment(tb, fs, NULL, 1);
if (rc < 0)
return rc;
}
*s = '\0';
if (--s >= pa->buf && *s == '\r')
*s = '\0';
s = (char *) skip_blank(pa->buf);
} while (*s == '\0' || *s == '#');
if (tb->fmt == MNT_FMT_GUESS) {
tb->fmt = guess_table_format(s);
if (tb->fmt == MNT_FMT_SWAPS)
goto next_line; /* skip swap header */
}
switch (tb->fmt) {
case MNT_FMT_FSTAB:
rc = mnt_parse_table_line(fs, s);
break;
case MNT_FMT_MOUNTINFO:
rc = mnt_parse_mountinfo_line(fs, s);
break;
case MNT_FMT_UTAB:
rc = mnt_parse_utab_line(fs, s);
break;
case MNT_FMT_SWAPS:
if (strncmp(s, "Filename\t", 9) == 0)
goto next_line; /* skip swap header */
rc = mnt_parse_swaps_line(fs, s);
break;
default:
rc = -1; /* unknown format */
break;
}
if (rc == 0)
return 0;
err:
DBG(TAB, ul_debugobj(tb, "%s:%zu: %s parse error", pa->filename, pa->line,
tb->fmt == MNT_FMT_MOUNTINFO ? "mountinfo" :
tb->fmt == MNT_FMT_SWAPS ? "swaps" :
tb->fmt == MNT_FMT_FSTAB ? "tab" : "utab"));
/* by default all errors are recoverable, otherwise behavior depends on
* the errcb() function. See mnt_table_set_parser_errcb().
*/
return tb->errcb ? tb->errcb(tb, pa->filename, pa->line) : 1;
}
