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tmpfiles: substitute % specifiers in arguments for writing files and xattrs

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This commit is contained in:
Lennart Poettering 2015-04-10 16:03:24 +02:00
parent c82500c6fb
commit bd550f78eb
1 changed files with 32 additions and 24 deletions
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56
src/tmpfiles/tmpfiles.c
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@ -147,6 +147,14 @@ static const char conf_file_dirs[] = CONF_DIRS_NULSTR("tmpfiles");
static Hashmap *items = NULL, *globs = NULL; static Hashmap *items = NULL, *globs = NULL;
static Set *unix_sockets = NULL; static Set *unix_sockets = NULL;
static const Specifier specifier_table[] = {
{ 'm', specifier_machine_id, NULL },
{ 'b', specifier_boot_id, NULL },
{ 'H', specifier_host_name, NULL },
{ 'v', specifier_kernel_release, NULL },
{}
};
static bool needs_glob(ItemType t) { static bool needs_glob(ItemType t) {
return IN_SET(t, return IN_SET(t,
WRITE_FILE, WRITE_FILE,
@ -622,7 +630,7 @@ static int path_set_perms(Item *i, const char *path) {
return label_fix(path, false, false); return label_fix(path, false, false);
} }
static int get_xattrs_from_arg(Item *i) { static int parse_xattrs_from_arg(Item *i) {
const char *p; const char *p;
int r; int r;
@ -632,22 +640,26 @@ static int get_xattrs_from_arg(Item *i) {
p = i->argument; p = i->argument;
for (;;) { for (;;) {
_cleanup_free_ char *name = NULL, *value = NULL, *xattr = NULL; _cleanup_free_ char *name = NULL, *value = NULL, *xattr = NULL, *xattr_replaced = NULL;
r = unquote_first_word(&p, &xattr, UNQUOTE_CUNESCAPE); r = unquote_first_word(&p, &xattr, UNQUOTE_CUNESCAPE);
if (r < 0) if (r < 0)
log_warning_errno(r, "Failed to parse extended attribute, ignoring: %s", p); log_warning_errno(r, "Failed to parse extended attribute '%s', ignoring: %m", p);
if (r <= 0) if (r <= 0)
break; break;
r = split_pair(xattr, "=", &name, &value); r = specifier_printf(xattr, specifier_table, NULL, &xattr_replaced);
if (r < 0)
return log_error_errno(r, "Failed to replace specifiers in extended attribute '%s': %m", xattr);
r = split_pair(xattr_replaced, "=", &name, &value);
if (r < 0) { if (r < 0) {
log_warning_errno(r, "Failed to parse extended attribute, ignoring: %s", xattr); log_warning_errno(r, "Failed to parse extended attribute, ignoring: %s", xattr);
continue; continue;
} }
if (isempty(name) || isempty(value)) { if (isempty(name) || isempty(value)) {
log_warning("Malformed xattr found, ignoring: %s", xattr); log_warning("Malformed extended attribute found, ignoring: %s", xattr);
continue; continue;
} }
@ -670,17 +682,16 @@ static int path_set_xattrs(Item *i, const char *path) {
int n; int n;
n = strlen(*value); n = strlen(*value);
log_debug("\"%s\": setting xattr \"%s=%s\"", path, *name, *value); log_debug("Setting extended attribute '%s=%s' on %s.", *name, *value, path);
if (lsetxattr(path, *name, *value, n, 0) < 0) { if (lsetxattr(path, *name, *value, n, 0) < 0) {
log_error("Setting extended attribute %s=%s on %s failed: %m", log_error("Setting extended attribute %s=%s on %s failed: %m", *name, *value, path);
*name, *value, path);
return -errno; return -errno;
} }
} }
return 0; return 0;
} }
static int get_acls_from_arg(Item *item) { static int parse_acls_from_arg(Item *item) {
#ifdef HAVE_ACL #ifdef HAVE_ACL
int r; int r;
@ -688,6 +699,7 @@ static int get_acls_from_arg(Item *item) {
/* If force (= modify) is set, we will not modify the acl /* If force (= modify) is set, we will not modify the acl
* afterwards, so the mask can be added now if necessary. */ * afterwards, so the mask can be added now if necessary. */
r = parse_acl(item->argument, &item->acl_access, &item->acl_default, !item->force); r = parse_acl(item->argument, &item->acl_access, &item->acl_default, !item->force);
if (r < 0) if (r < 0)
log_warning_errno(r, "Failed to parse ACL \"%s\": %m. Ignoring", item->argument); log_warning_errno(r, "Failed to parse ACL \"%s\": %m. Ignoring", item->argument);
@ -783,7 +795,7 @@ static int path_set_acls(Item *item, const char *path) {
FS_TOPDIR_FL | \ FS_TOPDIR_FL | \
FS_NOCOW_FL) FS_NOCOW_FL)
static int get_attribute_from_arg(Item *item) { static int parse_attribute_from_arg(Item *item) {
static const struct { static const struct {
char character; char character;
@ -936,7 +948,7 @@ static int write_one_file(Item *i, const char *path) {
} }
if (i->argument) { if (i->argument) {
_cleanup_free_ char *unescaped = NULL; _cleanup_free_ char *unescaped = NULL, *replaced = NULL;
log_debug("%s to \"%s\".", i->type == CREATE_FILE ? "Appending" : "Writing", path); log_debug("%s to \"%s\".", i->type == CREATE_FILE ? "Appending" : "Writing", path);
@ -944,7 +956,11 @@ static int write_one_file(Item *i, const char *path) {
if (r < 0) if (r < 0)
return log_error_errno(r, "Failed to unescape parameter to write: %s", i->argument); return log_error_errno(r, "Failed to unescape parameter to write: %s", i->argument);
r = loop_write(fd, unescaped, strlen(unescaped), false); r = specifier_printf(unescaped, specifier_table, NULL, &replaced);
if (r < 0)
return log_error_errno(r, "Failed to replace specifiers in parameter to write '%s': %m", unescaped);
r = loop_write(fd, replaced, strlen(replaced), false);
if (r < 0) if (r < 0)
return log_error_errno(r, "Failed to write file \"%s\": %m", path); return log_error_errno(r, "Failed to write file \"%s\": %m", path);
} else } else
@ -1651,14 +1667,6 @@ static bool should_include_path(const char *path) {
static int parse_line(const char *fname, unsigned line, const char *buffer) { static int parse_line(const char *fname, unsigned line, const char *buffer) {
static const Specifier specifier_table[] = {
{ 'm', specifier_machine_id, NULL },
{ 'b', specifier_boot_id, NULL },
{ 'H', specifier_host_name, NULL },
{ 'v', specifier_kernel_release, NULL },
{}
};
_cleanup_free_ char *action = NULL, *mode = NULL, *user = NULL, *group = NULL, *age = NULL, *path = NULL; _cleanup_free_ char *action = NULL, *mode = NULL, *user = NULL, *group = NULL, *age = NULL, *path = NULL;
_cleanup_(item_free_contents) Item i = {}; _cleanup_(item_free_contents) Item i = {};
ItemArray *existing; ItemArray *existing;
@ -1739,7 +1747,7 @@ static int parse_line(const char *fname, unsigned line, const char *buffer) {
case RELABEL_PATH: case RELABEL_PATH:
case RECURSIVE_RELABEL_PATH: case RECURSIVE_RELABEL_PATH:
if (i.argument) if (i.argument)
log_warning("[%s:%u] %c lines don't take argument field, ignoring.", fname, line, i.type); log_warning("[%s:%u] %c lines don't take argument fields, ignoring.", fname, line, i.type);
break; break;
@ -1799,7 +1807,7 @@ static int parse_line(const char *fname, unsigned line, const char *buffer) {
log_error("[%s:%u] Set extended attribute requires argument.", fname, line); log_error("[%s:%u] Set extended attribute requires argument.", fname, line);
return -EBADMSG; return -EBADMSG;
} }
r = get_xattrs_from_arg(&i); r = parse_xattrs_from_arg(&i);
if (r < 0) if (r < 0)
return r; return r;
break; break;
@ -1810,7 +1818,7 @@ static int parse_line(const char *fname, unsigned line, const char *buffer) {
log_error("[%s:%u] Set ACLs requires argument.", fname, line); log_error("[%s:%u] Set ACLs requires argument.", fname, line);
return -EBADMSG; return -EBADMSG;
} }
r = get_acls_from_arg(&i); r = parse_acls_from_arg(&i);
if (r < 0) if (r < 0)
return r; return r;
break; break;
@ -1821,7 +1829,7 @@ static int parse_line(const char *fname, unsigned line, const char *buffer) {
log_error("[%s:%u] Set file attribute requires argument.", fname, line); log_error("[%s:%u] Set file attribute requires argument.", fname, line);
return -EBADMSG; return -EBADMSG;
} }
r = get_attribute_from_arg(&i); r = parse_attribute_from_arg(&i);
if (r < 0) if (r < 0)
return r; return r;
break; break;