/*
* Parses one line from {fs,m}tab
*/
static int mnt_parse_table_line(struct libmnt_fs *fs, char *s)
{
int rc, n = 0;
char *src, *fstype, *optstr;
rc = sscanf(s, UL_SCNsA" " /* (1) source */
UL_SCNsA" " /* (2) target */
UL_SCNsA" " /* (3) FS type */
UL_SCNsA" " /* (4) options */
"%n", /* byte count */
&src,
&fs->target,
&fstype,
&optstr,
&n);
if (rc == 4) {
unmangle_string(src);
unmangle_string(fs->target);
unmangle_string(fstype);
unmangle_string(optstr);
rc = __mnt_fs_set_source_ptr(fs, src);
if (!rc)
rc = __mnt_fs_set_fstype_ptr(fs, fstype);
if (!rc)
rc = mnt_fs_set_options(fs, optstr);
free(optstr);
} else {
DBG(TAB, mnt_debug("tab parse error: [sscanf rc=%d]: '%s'", rc, s));
rc = -EINVAL;
}
if (rc)
return rc; /* error */
fs->passno = fs->freq = 0;
s = skip_spaces(s + n);
if (*s) {
if (next_number(&s, &fs->freq) != 0) {
if (*s) {
DBG(TAB, mnt_debug("tab parse error: [freq]"));
rc = -EINVAL;
}
} else if (next_number(&s, &fs->passno) != 0 && *s) {
DBG(TAB, mnt_debug("tab parse error: [passno]"));
rc = -EINVAL;
}
}
return rc;
}
/*
* Parses one line from /proc/swaps
*/
static int mnt_parse_swaps_line(struct libmnt_fs *fs, char *s)
{
uintmax_t fsz, usz;
int rc;
char *src = NULL;
rc = sscanf(s, UL_SCNsA" " /* (1) source */
UL_SCNsA" " /* (2) type */
"%jd" /* (3) size */
"%jd" /* (4) used */
"%d", /* priority */
&src,
&fs->swaptype,
&fsz,
&usz,
&fs->priority);
if (rc == 5) {
size_t sz;
fs->size = fsz;
fs->usedsize = usz;
unmangle_string(src);
/* remove "(deleted)" suffix */
sz = strlen(src);
if (sz > PATH_DELETED_SUFFIX_SZ) {
char *p = src + (sz - PATH_DELETED_SUFFIX_SZ);
if (strcmp(p, PATH_DELETED_SUFFIX) == 0)
*p = '\0';
}
rc = mnt_fs_set_source(fs, src);
if (!rc)
mnt_fs_set_fstype(fs, "swap");
free(src);
} else {
DBG(TAB, mnt_debug("tab parse error: [sscanf rc=%d]: '%s'", rc, s));
rc = -EINVAL;
}
return rc;
}
/*
* Parses one line from {fs,m}tab
*/
static int mnt_parse_table_line(struct libmnt_fs *fs, char *s)
{
int rc, n = 0, xrc;
char *src = NULL, *fstype = NULL, *optstr = NULL;
rc = sscanf(s, UL_SCNsA" " /* (1) source */
UL_SCNsA" " /* (2) target */
UL_SCNsA" " /* (3) FS type */
UL_SCNsA" " /* (4) options */
"%n", /* byte count */
&src,
&fs->target,
&fstype,
&optstr,
&n);
xrc = rc;
if (rc == 3 || rc == 4) { /* options are optional */
unmangle_string(src);
unmangle_string(fs->target);
unmangle_string(fstype);
if (optstr && *optstr)
unmangle_string(optstr);
/* note that __foo functions does not reallocate the string
*/
rc = __mnt_fs_set_source_ptr(fs, src);
if (!rc) {
src = NULL;
rc = __mnt_fs_set_fstype_ptr(fs, fstype);
if (!rc)
fstype = NULL;
}
if (!rc && optstr)
rc = mnt_fs_set_options(fs, optstr);
free(optstr);
optstr = NULL;
} else {
DBG(TAB, mnt_debug("tab parse error: [sscanf rc=%d]: '%s'", rc, s));
rc = -EINVAL;
}
if (rc) {
free(src);
free(fstype);
free(optstr);
DBG(TAB, mnt_debug("tab parse error: [set vars, rc=%d]\n", rc));
return rc; /* error */
}
fs->passno = fs->freq = 0;
if (xrc == 4 && n)
s = skip_spaces(s + n);
if (xrc == 4 && *s) {
if (next_number(&s, &fs->freq) != 0) {
if (*s) {
DBG(TAB, mnt_debug("tab parse error: [freq]"));
rc = -EINVAL;
}
} else if (next_number(&s, &fs->passno) != 0 && *s) {
DBG(TAB, mnt_debug("tab parse error: [passno]"));
rc = -EINVAL;
}
}
return rc;
}
/*
* Parses one line from mountinfo file
*/
static int mnt_parse_mountinfo_line(struct libmnt_fs *fs, char *s)
{
int rc, end = 0;
unsigned int maj, min;
char *fstype = NULL, *src = NULL, *p;
rc = sscanf(s, "%u " /* (1) id */
"%u " /* (2) parent */
"%u:%u " /* (3) maj:min */
UL_SCNsA" " /* (4) mountroot */
UL_SCNsA" " /* (5) target */
UL_SCNsA /* (6) vfs options (fs-independent) */
"%n", /* number of read bytes */
&fs->id,
&fs->parent,
&maj, &min,
&fs->root,
&fs->target,
&fs->vfs_optstr,
&end);
if (rc >= 7 && end > 0)
s += end;
/* (7) optional fields, terminated by " - " */
p = strstr(s, " - ");
if (!p) {
DBG(TAB, mnt_debug("mountinfo parse error: not found separator"));
return -EINVAL;
}
s = p + 3;
rc += sscanf(s, UL_SCNsA" " /* (8) FS type */
UL_SCNsA" " /* (9) source */
UL_SCNsA, /* (10) fs options (fs specific) */
&fstype,
&src,
&fs->fs_optstr);
if (rc >= 10) {
fs->flags |= MNT_FS_KERNEL;
fs->devno = makedev(maj, min);
unmangle_string(fs->root);
unmangle_string(fs->target);
unmangle_string(fs->vfs_optstr);
unmangle_string(fstype);
unmangle_string(src);
unmangle_string(fs->fs_optstr);
rc = __mnt_fs_set_fstype_ptr(fs, fstype);
if (!rc) {
fstype = NULL;
rc = __mnt_fs_set_source_ptr(fs, src);
if (!rc)
src = NULL;
}
/* merge VFS and FS options to the one string */
fs->optstr = mnt_fs_strdup_options(fs);
if (!fs->optstr)
rc = -ENOMEM;
} else {
free(fstype);
free(src);
DBG(TAB, mnt_debug(
"mountinfo parse error [sscanf rc=%d]: '%s'", rc, s));
rc = -EINVAL;
}
return rc;
}
/*
* Parses one line from a mountinfo file
*/
static int mnt_parse_mountinfo_line(struct libmnt_fs *fs, char *s)
{
int rc, end = 0;
unsigned int maj, min;
char *fstype = NULL, *src = NULL, *p;
#ifndef HAVE_SCANF_MS_MODIFIER
size_t len = strlen(s) + 1;
fs->root = malloc(len);
fs->target = malloc(len);
fs->vfs_optstr = malloc(len);
fs->fs_optstr = malloc(len);
fstype = malloc(len);
src = malloc(len);
#endif
rc = sscanf(s, "%d " /* (1) id */
"%d " /* (2) parent */
"%u:%u " /* (3) maj:min */
UL_SCNsA" " /* (4) mountroot */
UL_SCNsA" " /* (5) target */
UL_SCNsA /* (6) vfs options (fs-independent) */
"%n", /* number of read bytes */
&fs->id,
&fs->parent,
&maj, &min,
#ifdef HAVE_SCANF_MS_MODIFIER
&fs->root,
&fs->target,
&fs->vfs_optstr,
#else
fs->root,
fs->target,
fs->vfs_optstr,
#endif
&end);
if (rc >= 7 && end > 0)
s += end;
/* (7) optional fields, terminated by " - " */
p = strstr(s, " - ");
if (!p) {
DBG(TAB, ul_debug("mountinfo parse error: separator not found"));
return -EINVAL;
}
if (p > s + 1)
fs->opt_fields = strndup(s + 1, p - s - 1);
s = p + 3;
rc += sscanf(s, UL_SCNsA" " /* (8) FS type */
UL_SCNsA" " /* (9) source */
UL_SCNsA, /* (10) fs options (fs specific) */
#ifdef HAVE_SCANF_MS_MODIFIER
&fstype,
&src,
&fs->fs_optstr);
#else
fstype,
src,
fs->fs_optstr);
#endif
if (rc >= 10) {
size_t sz;
fs->flags |= MNT_FS_KERNEL;
fs->devno = makedev(maj, min);
/* remove "(deleted)" suffix */
sz = strlen(fs->target);
if (sz > PATH_DELETED_SUFFIX_SZ) {
char *p = fs->target + (sz - PATH_DELETED_SUFFIX_SZ);
if (strcmp(p, PATH_DELETED_SUFFIX) == 0)
*p = '\0';
}
unmangle_string(fs->root);
unmangle_string(fs->target);
unmangle_string(fs->vfs_optstr);
unmangle_string(fstype);
unmangle_string(src);
unmangle_string(fs->fs_optstr);
rc = __mnt_fs_set_fstype_ptr(fs, fstype);
if (!rc) {
fstype = NULL;
rc = __mnt_fs_set_source_ptr(fs, src);
if (!rc)
src = NULL;
}
/* merge VFS and FS options to one string */
fs->optstr = mnt_fs_strdup_options(fs);
if (!fs->optstr)
rc = -ENOMEM;
} else {
free(fstype);
free(src);
DBG(TAB, ul_debug(
"mountinfo parse error [sscanf rc=%d]: '%s'", rc, s));
rc = -EINVAL;
}
return rc;
}
