#include <stdlib.h>
#include <signal.h>
#include <libintl.h>
+#include <locale.h>
#include <stdio.h>
#include <syslog.h>
#include <sched.h>
return (char*) s + sl - pl;
}
-char* endswith_no_case(const char *s, const char *postfix) {
- size_t sl, pl;
-
- assert(s);
- assert(postfix);
-
- sl = strlen(s);
- pl = strlen(postfix);
-
- if (pl == 0)
- return (char*) s + sl;
-
- if (sl < pl)
- return NULL;
-
- if (strcasecmp(s + sl - pl, postfix) != 0)
- return NULL;
-
- return (char*) s + sl - pl;
-}
-
char* first_word(const char *s, const char *word) {
size_t sl, wl;
const char *p;
assert(s);
- /* Does C style string escaping. May be reversed with
- * cunescape(). */
+ /* Does C style string escaping. */
r = new(char, strlen(s)*4 + 1);
if (!r)
return r;
}
-static int cunescape_one(const char *p, size_t length, char *ret, uint32_t *ret_unicode) {
+static int cunescape_one(const char *p, size_t length, char *ret) {
int r = 1;
assert(p);
assert(*p);
assert(ret);
- /* Unescapes C style. Returns the unescaped character in ret,
- * unless we encountered a \u sequence in which case the full
- * unicode character is returned in ret_unicode, instead. */
-
if (length != (size_t) -1 && length < 1)
return -EINVAL;
if (b < 0)
return -EINVAL;
- /* Don't allow NUL bytes */
+ /* don't allow NUL bytes */
if (a == 0 && b == 0)
return -EINVAL;
- *ret = (char) ((a << 4U) | b);
+ *ret = (char) ((a << 4) | b);
r = 3;
break;
}
- case 'u': {
- /* C++11 style 16bit unicode */
-
- int a[4];
- unsigned i;
- uint32_t c;
-
- if (length != (size_t) -1 && length < 5)
- return -EINVAL;
-
- for (i = 0; i < 4; i++) {
- a[i] = unhexchar(p[1 + i]);
- if (a[i] < 0)
- return a[i];
- }
-
- c = ((uint32_t) a[0] << 12U) | ((uint32_t) a[1] << 8U) | ((uint32_t) a[2] << 4U) | (uint32_t) a[3];
-
- /* Don't allow 0 chars */
- if (c == 0)
- return -EINVAL;
-
- if (c < 128)
- *ret = c;
- else {
- if (!ret_unicode)
- return -EINVAL;
-
- *ret = 0;
- *ret_unicode = c;
- }
-
- r = 5;
- break;
- }
-
- case 'U': {
- /* C++11 style 32bit unicode */
-
- int a[8];
- unsigned i;
- uint32_t c;
-
- if (length != (size_t) -1 && length < 9)
- return -EINVAL;
-
- for (i = 0; i < 8; i++) {
- a[i] = unhexchar(p[1 + i]);
- if (a[i] < 0)
- return a[i];
- }
-
- c = ((uint32_t) a[0] << 28U) | ((uint32_t) a[1] << 24U) | ((uint32_t) a[2] << 20U) | ((uint32_t) a[3] << 16U) |
- ((uint32_t) a[4] << 12U) | ((uint32_t) a[5] << 8U) | ((uint32_t) a[6] << 4U) | (uint32_t) a[7];
-
- /* Don't allow 0 chars */
- if (c == 0)
- return -EINVAL;
-
- /* Don't allow invalid code points */
- if (!unichar_is_valid(c))
- return -EINVAL;
-
- if (c < 128)
- *ret = c;
- else {
- if (!ret_unicode)
- return -EINVAL;
-
- *ret = 0;
- *ret_unicode = c;
- }
-
- r = 9;
- break;
- }
-
case '0':
case '1':
case '2':
case '6':
case '7': {
/* octal encoding */
- int a, b, c;
- uint32_t m;
+ int a, b, c, m;
if (length != (size_t) -1 && length < 4)
return -EINVAL;
return -EINVAL;
/* Don't allow bytes above 255 */
- m = ((uint32_t) a << 6U) | ((uint32_t) b << 3U) | (uint32_t) c;
+ m = (a << 6) | (b << 3) | c;
if (m > 255)
return -EINVAL;
- *ret = m;
+ *ret = (char) m;
r = 3;
break;
}
return r;
}
-int cunescape_length_with_prefix(const char *s, size_t length, const char *prefix, UnescapeFlags flags, char **ret) {
+char *cunescape_length_with_prefix(const char *s, size_t length, const char *prefix) {
char *r, *t;
const char *f;
size_t pl;
assert(s);
- assert(ret);
/* Undoes C style string escaping, and optionally prefixes it. */
r = new(char, pl+length+1);
if (!r)
- return -ENOMEM;
+ return NULL;
if (prefix)
memcpy(r, prefix, pl);
for (f = s, t = r + pl; f < s + length; f++) {
size_t remaining;
- uint32_t u;
- char c;
int k;
remaining = s + length - f;
assert(remaining > 0);
- if (*f != '\\') {
- /* A literal literal, copy verbatim */
+ if (*f != '\\' || remaining == 1) {
+ /* a literal literal, or a trailing backslash, copy verbatim */
*(t++) = *f;
continue;
}
- if (remaining == 1) {
- if (flags & UNESCAPE_RELAX) {
- /* A trailing backslash, copy verbatim */
- *(t++) = *f;
- continue;
- }
-
- free(r);
- return -EINVAL;
- }
-
- k = cunescape_one(f + 1, remaining - 1, &c, &u);
+ k = cunescape_one(f + 1, remaining - 1, t);
if (k < 0) {
- if (flags & UNESCAPE_RELAX) {
- /* Invalid escape code, let's take it literal then */
- *(t++) = '\\';
- continue;
- }
-
- free(r);
- return k;
+ /* Invalid escape code, let's take it literal then */
+ *(t++) = '\\';
+ continue;
}
- if (c != 0)
- /* Non-Unicode? Let's encode this directly */
- *(t++) = c;
- else
- /* Unicode? Then let's encode this in UTF-8 */
- t += utf8_encode_unichar(t, u);
-
f += k;
+ t++;
}
*t = 0;
-
- *ret = r;
- return t - r;
+ return r;
}
-int cunescape_length(const char *s, size_t length, UnescapeFlags flags, char **ret) {
- return cunescape_length_with_prefix(s, length, NULL, flags, ret);
+char *cunescape_length(const char *s, size_t length) {
+ return cunescape_length_with_prefix(s, length, NULL);
}
-int cunescape(const char *s, UnescapeFlags flags, char **ret) {
- return cunescape_length(s, strlen(s), flags, ret);
+char *cunescape(const char *s) {
+ assert(s);
+
+ return cunescape_length(s, strlen(s));
}
char *xescape(const char *s, const char *bad) {
/* Escapes all chars in bad, in addition to \ and all special
* chars, in \xFF style escaping. May be reversed with
- * cunescape(). */
+ * cunescape. */
r = new(char, strlen(s) * 4 + 1);
if (!r)
return 0;
}
-bool is_temporary_fs(const struct statfs *s) {
+int rm_rf_children_dangerous(int fd, bool only_dirs, bool honour_sticky, struct stat *root_dev) {
+ _cleanup_closedir_ DIR *d = NULL;
+ int ret = 0;
+
+ assert(fd >= 0);
+
+ /* This returns the first error we run into, but nevertheless
+ * tries to go on. This closes the passed fd. */
+
+ d = fdopendir(fd);
+ if (!d) {
+ safe_close(fd);
+
+ return errno == ENOENT ? 0 : -errno;
+ }
+
+ for (;;) {
+ struct dirent *de;
+ bool is_dir, keep_around;
+ struct stat st;
+ int r;
+
+ errno = 0;
+ de = readdir(d);
+ if (!de) {
+ if (errno != 0 && ret == 0)
+ ret = -errno;
+ return ret;
+ }
+
+ if (streq(de->d_name, ".") || streq(de->d_name, ".."))
+ continue;
+
+ if (de->d_type == DT_UNKNOWN ||
+ honour_sticky ||
+ (de->d_type == DT_DIR && root_dev)) {
+ if (fstatat(fd, de->d_name, &st, AT_SYMLINK_NOFOLLOW) < 0) {
+ if (ret == 0 && errno != ENOENT)
+ ret = -errno;
+ continue;
+ }
+
+ is_dir = S_ISDIR(st.st_mode);
+ keep_around =
+ honour_sticky &&
+ (st.st_uid == 0 || st.st_uid == getuid()) &&
+ (st.st_mode & S_ISVTX);
+ } else {
+ is_dir = de->d_type == DT_DIR;
+ keep_around = false;
+ }
+
+ if (is_dir) {
+ int subdir_fd;
+
+ /* if root_dev is set, remove subdirectories only, if device is same as dir */
+ if (root_dev && st.st_dev != root_dev->st_dev)
+ continue;
+
+ subdir_fd = openat(fd, de->d_name,
+ O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC|O_NOFOLLOW|O_NOATIME);
+ if (subdir_fd < 0) {
+ if (ret == 0 && errno != ENOENT)
+ ret = -errno;
+ continue;
+ }
+
+ r = rm_rf_children_dangerous(subdir_fd, only_dirs, honour_sticky, root_dev);
+ if (r < 0 && ret == 0)
+ ret = r;
+
+ if (!keep_around)
+ if (unlinkat(fd, de->d_name, AT_REMOVEDIR) < 0) {
+ if (ret == 0 && errno != ENOENT)
+ ret = -errno;
+ }
+
+ } else if (!only_dirs && !keep_around) {
+
+ if (unlinkat(fd, de->d_name, 0) < 0) {
+ if (ret == 0 && errno != ENOENT)
+ ret = -errno;
+ }
+ }
+ }
+}
+
+_pure_ static int is_temporary_fs(struct statfs *s) {
assert(s);
return F_TYPE_EQUAL(s->f_type, TMPFS_MAGIC) ||
F_TYPE_EQUAL(s->f_type, RAMFS_MAGIC);
}
-int fd_is_temporary_fs(int fd) {
+int is_fd_on_temporary_fs(int fd) {
struct statfs s;
if (fstatfs(fd, &s) < 0)
return is_temporary_fs(&s);
}
+int rm_rf_children(int fd, bool only_dirs, bool honour_sticky, struct stat *root_dev) {
+ struct statfs s;
+
+ assert(fd >= 0);
+
+ if (fstatfs(fd, &s) < 0) {
+ safe_close(fd);
+ return -errno;
+ }
+
+ /* We refuse to clean disk file systems with this call. This
+ * is extra paranoia just to be sure we never ever remove
+ * non-state data */
+ if (!is_temporary_fs(&s)) {
+ log_error("Attempted to remove disk file system, and we can't allow that.");
+ safe_close(fd);
+ return -EPERM;
+ }
+
+ return rm_rf_children_dangerous(fd, only_dirs, honour_sticky, root_dev);
+}
+
+static int file_is_priv_sticky(const char *p) {
+ struct stat st;
+
+ assert(p);
+
+ if (lstat(p, &st) < 0)
+ return -errno;
+
+ return
+ (st.st_uid == 0 || st.st_uid == getuid()) &&
+ (st.st_mode & S_ISVTX);
+}
+
+static int rm_rf_internal(const char *path, bool only_dirs, bool delete_root, bool honour_sticky, bool dangerous) {
+ int fd, r;
+ struct statfs s;
+
+ assert(path);
+
+ /* We refuse to clean the root file system with this
+ * call. This is extra paranoia to never cause a really
+ * seriously broken system. */
+ if (path_equal(path, "/")) {
+ log_error("Attempted to remove entire root file system, and we can't allow that.");
+ return -EPERM;
+ }
+
+ fd = open(path, O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC|O_NOFOLLOW|O_NOATIME);
+ if (fd < 0) {
+
+ if (errno != ENOTDIR && errno != ELOOP)
+ return -errno;
+
+ if (!dangerous) {
+ if (statfs(path, &s) < 0)
+ return -errno;
+
+ if (!is_temporary_fs(&s)) {
+ log_error("Attempted to remove disk file system, and we can't allow that.");
+ return -EPERM;
+ }
+ }
+
+ if (delete_root && !only_dirs)
+ if (unlink(path) < 0 && errno != ENOENT)
+ return -errno;
+
+ return 0;
+ }
+
+ if (!dangerous) {
+ if (fstatfs(fd, &s) < 0) {
+ safe_close(fd);
+ return -errno;
+ }
+
+ if (!is_temporary_fs(&s)) {
+ log_error("Attempted to remove disk file system, and we can't allow that.");
+ safe_close(fd);
+ return -EPERM;
+ }
+ }
+
+ r = rm_rf_children_dangerous(fd, only_dirs, honour_sticky, NULL);
+ if (delete_root) {
+
+ if (honour_sticky && file_is_priv_sticky(path) > 0)
+ return r;
+
+ if (rmdir(path) < 0 && errno != ENOENT) {
+ if (r == 0)
+ r = -errno;
+ }
+ }
+
+ return r;
+}
+
+int rm_rf(const char *path, bool only_dirs, bool delete_root, bool honour_sticky) {
+ return rm_rf_internal(path, only_dirs, delete_root, honour_sticky, false);
+}
+
+int rm_rf_dangerous(const char *path, bool only_dirs, bool delete_root, bool honour_sticky) {
+ return rm_rf_internal(path, only_dirs, delete_root, honour_sticky, true);
+}
+
int chmod_and_chown(const char *path, mode_t mode, uid_t uid, gid_t gid) {
assert(path);
return touch_file(path, false, USEC_INFINITY, UID_INVALID, GID_INVALID, 0);
}
-static char *unquote(const char *s, const char* quotes) {
+char *unquote(const char *s, const char* quotes) {
size_t l;
assert(s);
/* This is rather stupid, simply removes the heading and
* trailing quotes if there is one. Doesn't care about
- * escaping or anything.
- *
- * DON'T USE THIS FOR NEW CODE ANYMORE!*/
+ * escaping or anything. We should make this smarter one
+ * day... */
l = strlen(s);
if (l < 2)
return strdup(s);
}
+char *normalize_env_assignment(const char *s) {
+ _cleanup_free_ char *value = NULL;
+ const char *eq;
+ char *p, *name;
+
+ eq = strchr(s, '=');
+ if (!eq) {
+ char *r, *t;
+
+ r = strdup(s);
+ if (!r)
+ return NULL;
+
+ t = strstrip(r);
+ if (t != r)
+ memmove(r, t, strlen(t) + 1);
+
+ return r;
+ }
+
+ name = strndupa(s, eq - s);
+ p = strdupa(eq + 1);
+
+ value = unquote(strstrip(p), QUOTES);
+ if (!value)
+ return NULL;
+
+ return strjoin(strstrip(name), "=", value, NULL);
+}
+
int wait_for_terminate(pid_t pid, siginfo_t *status) {
siginfo_t dummy;
_cleanup_free_ char *t = NULL, *u = NULL;
size_t enc_len;
- u = unquote(tagvalue, QUOTES);
+ u = unquote(tagvalue, "\"\'");
if (!u)
return NULL;
continue;
}
- r = cunescape(path, UNESCAPE_RELAX, &p);
- if (r < 0)
- return r;
+ p = cunescape(path);
+ if (!p)
+ return -ENOMEM;
if (!path_startswith(p, prefix))
continue;
continue;
}
- r = cunescape(path, UNESCAPE_RELAX, &p);
- if (r < 0)
- return r;
+ p = cunescape(path);
+ if (!p)
+ return -ENOMEM;
/* Let's ignore autofs mounts. If they aren't
* triggered yet, we want to avoid triggering
return -EINVAL;
}
- if (!GREEDY_REALLOC(s, allocated, sz+7))
+ if (!GREEDY_REALLOC(s, allocated, sz+2))
return -ENOMEM;
if (flags & UNQUOTE_CUNESCAPE) {
- uint32_t u;
-
- r = cunescape_one(*p, (size_t) -1, &c, &u);
+ r = cunescape_one(*p, (size_t) -1, &c);
if (r < 0)
return -EINVAL;
(*p) += r - 1;
+ }
- if (c != 0)
- s[sz++] = c; /* normal explicit char */
- else
- sz += utf8_encode_unichar(s + sz, u); /* unicode chars we'll encode as utf8 */
- } else
- s[sz++] = c;
-
+ s[sz++] = c;
state = VALUE;
+
break;
case SINGLE_QUOTE:
return -EINVAL;
}
- if (!GREEDY_REALLOC(s, allocated, sz+7))
+ if (!GREEDY_REALLOC(s, allocated, sz+2))
return -ENOMEM;
if (flags & UNQUOTE_CUNESCAPE) {
- uint32_t u;
-
- r = cunescape_one(*p, (size_t) -1, &c, &u);
+ r = cunescape_one(*p, (size_t) -1, &c);
if (r < 0)
return -EINVAL;
(*p) += r - 1;
+ }
- if (c != 0)
- s[sz++] = c;
- else
- sz += utf8_encode_unichar(s + sz, u);
- } else
- s[sz++] = c;
-
+ s[sz++] = c;
state = SINGLE_QUOTE;
break;
return -EINVAL;
}
- if (!GREEDY_REALLOC(s, allocated, sz+7))
+ if (!GREEDY_REALLOC(s, allocated, sz+2))
return -ENOMEM;
if (flags & UNQUOTE_CUNESCAPE) {
- uint32_t u;
-
- r = cunescape_one(*p, (size_t) -1, &c, &u);
+ r = cunescape_one(*p, (size_t) -1, &c);
if (r < 0)
return -EINVAL;
(*p) += r - 1;
+ }
- if (c != 0)
- s[sz++] = c;
- else
- sz += utf8_encode_unichar(s + sz, u);
- } else
- s[sz++] = c;
-
+ s[sz++] = c;
state = DOUBLE_QUOTE;
break;
return 0;
}
-int chattr_fd(int fd, unsigned value, unsigned mask) {
+int chattr_fd(int fd, bool b, unsigned mask) {
unsigned old_attr, new_attr;
assert(fd >= 0);
if (ioctl(fd, FS_IOC_GETFLAGS, &old_attr) < 0)
return -errno;
- new_attr = (old_attr & ~mask) | (value & mask);
+ if (b)
+ new_attr = old_attr | mask;
+ else
+ new_attr = old_attr & ~mask;
+
if (new_attr == old_attr)
return 0;
if (ioctl(fd, FS_IOC_SETFLAGS, &new_attr) < 0)
return -errno;
- return 1;
+ return 0;
}
-int chattr_path(const char *p, unsigned value, unsigned mask) {
+int chattr_path(const char *p, bool b, unsigned mask) {
_cleanup_close_ int fd = -1;
assert(p);
if (fd < 0)
return -errno;
- return chattr_fd(fd, value, mask);
+ return chattr_fd(fd, b, mask);
+}
+
+int change_attr_fd(int fd, unsigned value, unsigned mask) {
+ unsigned old_attr, new_attr;
+
+ assert(fd >= 0);
+
+ if (mask == 0)
+ return 0;
+
+ if (ioctl(fd, FS_IOC_GETFLAGS, &old_attr) < 0)
+ return -errno;
+
+ new_attr = (old_attr & ~mask) |(value & mask);
+
+ if (new_attr == old_attr)
+ return 0;
+
+ if (ioctl(fd, FS_IOC_SETFLAGS, &new_attr) < 0)
+ return -errno;
+
+ return 0;
}
int read_attr_fd(int fd, unsigned *ret) {
return 0;
}
-
-char *shell_maybe_quote(const char *s) {
- const char *p;
- char *r, *t;
-
- assert(s);
-
- /* Encloses a string in double quotes if necessary to make it
- * OK as shell string. */
-
- for (p = s; *p; p++)
- if (*p <= ' ' ||
- *p >= 127 ||
- strchr(SHELL_NEED_QUOTES, *p))
- break;
-
- if (!*p)
- return strdup(s);
-
- r = new(char, 1+strlen(s)*2+1+1);
- if (!r)
- return NULL;
-
- t = r;
- *(t++) = '"';
- t = mempcpy(t, s, p - s);
-
- for (; *p; p++) {
-
- if (strchr(SHELL_NEED_ESCAPE, *p))
- *(t++) = '\\';
-
- *(t++) = *p;
- }
-
- *(t++)= '"';
- *t = 0;
-
- return r;
-}
-
-int parse_mode(const char *s, mode_t *ret) {
- char *x;
- long l;
-
- assert(s);
- assert(ret);
-
- errno = 0;
- l = strtol(s, &x, 8);
- if (errno != 0)
- return -errno;
-
- if (!x || x == s || *x)
- return -EINVAL;
- if (l < 0 || l > 07777)
- return -ERANGE;
-
- *ret = (mode_t) l;
- return 0;
-}
~ianmdlvl / elogind.git / blobdiff