summaryrefslogtreecommitdiff
path: root/src/basic/path-util.c
diff options
context:
space:
mode:
Diffstat (limited to 'src/basic/path-util.c')
-rw-r--r--src/basic/path-util.c208
1 files changed, 139 insertions, 69 deletions
diff --git a/src/basic/path-util.c b/src/basic/path-util.c
index 1039623305..7b01633f5f 100644
--- a/src/basic/path-util.c
+++ b/src/basic/path-util.c
@@ -19,21 +19,23 @@
along with systemd; If not, see <http://www.gnu.org/licenses/>.
***/
-#include <string.h>
-#include <unistd.h>
#include <errno.h>
-#include <stdlib.h>
-#include <stdio.h>
#include <fcntl.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
#include <sys/statvfs.h>
+#include <unistd.h>
-#include "macro.h"
-#include "util.h"
+#include "fd-util.h"
+#include "fileio.h"
#include "log.h"
-#include "strv.h"
-#include "path-util.h"
+#include "macro.h"
#include "missing.h"
-#include "fileio.h"
+#include "path-util.h"
+#include "string-util.h"
+#include "strv.h"
+#include "util.h"
bool path_is_absolute(const char *p) {
return p[0] == '/';
@@ -84,20 +86,25 @@ int path_get_parent(const char *path, char **_r) {
return 0;
}
-char **path_split_and_make_absolute(const char *p) {
+int path_split_and_make_absolute(const char *p, char ***ret) {
char **l;
+ int r;
+
assert(p);
+ assert(ret);
l = strv_split(p, ":");
if (!l)
return NULL;
- if (!path_strv_make_absolute_cwd(l)) {
+ r = path_strv_make_absolute_cwd(l);
+ if (r < 0) {
strv_free(l);
- return NULL;
+ return r;
}
- return l;
+ *ret = l;
+ return r;
}
char *path_make_absolute(const char *p, const char *prefix) {
@@ -112,22 +119,31 @@ char *path_make_absolute(const char *p, const char *prefix) {
return strjoin(prefix, "/", p, NULL);
}
-char *path_make_absolute_cwd(const char *p) {
- _cleanup_free_ char *cwd = NULL;
+int path_make_absolute_cwd(const char *p, char **ret) {
+ char *c;
assert(p);
+ assert(ret);
/* Similar to path_make_absolute(), but prefixes with the
* current working directory. */
if (path_is_absolute(p))
- return strdup(p);
+ c = strdup(p);
+ else {
+ _cleanup_free_ char *cwd = NULL;
- cwd = get_current_dir_name();
- if (!cwd)
- return NULL;
+ cwd = get_current_dir_name();
+ if (!cwd)
+ return -errno;
- return strjoin(cwd, "/", p, NULL);
+ c = strjoin(cwd, "/", p, NULL);
+ }
+ if (!c)
+ return -ENOMEM;
+
+ *ret = c;
+ return 0;
}
int path_make_relative(const char *from_dir, const char *to_path, char **_r) {
@@ -215,8 +231,9 @@ int path_make_relative(const char *from_dir, const char *to_path, char **_r) {
return 0;
}
-char **path_strv_make_absolute_cwd(char **l) {
+int path_strv_make_absolute_cwd(char **l) {
char **s;
+ int r;
/* Goes through every item in the string list and makes it
* absolute. This works in place and won't rollback any
@@ -225,15 +242,15 @@ char **path_strv_make_absolute_cwd(char **l) {
STRV_FOREACH(s, l) {
char *t;
- t = path_make_absolute_cwd(*s);
- if (!t)
- return NULL;
+ r = path_make_absolute_cwd(*s, &t);
+ if (r < 0)
+ return r;
free(*s);
*s = t;
}
- return l;
+ return 0;
}
char **path_strv_resolve(char **l, const char *prefix) {
@@ -698,7 +715,6 @@ int path_is_os_tree(const char *path) {
/* We use /usr/lib/os-release as flag file if something is an OS */
p = strjoina(path, "/usr/lib/os-release");
r = access(p, F_OK);
-
if (r >= 0)
return 1;
@@ -709,56 +725,66 @@ int path_is_os_tree(const char *path) {
return r >= 0;
}
-int find_binary(const char *name, bool local, char **filename) {
+int find_binary(const char *name, char **ret) {
+ int last_error, r;
+ const char *p;
+
assert(name);
if (is_path(name)) {
- if (local && access(name, X_OK) < 0)
+ if (access(name, X_OK) < 0)
return -errno;
- if (filename) {
- char *p;
-
- p = path_make_absolute_cwd(name);
- if (!p)
- return -ENOMEM;
-
- *filename = p;
+ if (ret) {
+ r = path_make_absolute_cwd(name, ret);
+ if (r < 0)
+ return r;
}
return 0;
- } else {
- const char *path;
- const char *word, *state;
- size_t l;
-
- /**
- * Plain getenv, not secure_getenv, because we want
- * to actually allow the user to pick the binary.
- */
- path = getenv("PATH");
- if (!path)
- path = DEFAULT_PATH;
-
- FOREACH_WORD_SEPARATOR(word, l, path, ":", state) {
- _cleanup_free_ char *p = NULL;
-
- if (asprintf(&p, "%.*s/%s", (int) l, word, name) < 0)
- return -ENOMEM;
+ }
- if (access(p, X_OK) < 0)
- continue;
+ /**
+ * Plain getenv, not secure_getenv, because we want
+ * to actually allow the user to pick the binary.
+ */
+ p = getenv("PATH");
+ if (!p)
+ p = DEFAULT_PATH;
+
+ last_error = -ENOENT;
+
+ for (;;) {
+ _cleanup_free_ char *j = NULL, *element = NULL;
+
+ r = extract_first_word(&p, &element, ":", EXTRACT_RELAX|EXTRACT_DONT_COALESCE_SEPARATORS);
+ if (r < 0)
+ return r;
+ if (r == 0)
+ break;
+
+ if (!path_is_absolute(element))
+ continue;
- if (filename) {
- *filename = path_kill_slashes(p);
- p = NULL;
+ j = strjoin(element, "/", name, NULL);
+ if (!j)
+ return -ENOMEM;
+
+ if (access(j, X_OK) >= 0) {
+ /* Found it! */
+
+ if (ret) {
+ *ret = path_kill_slashes(j);
+ j = NULL;
}
return 0;
}
- return -ENOENT;
+ last_error = -errno;
}
+
+ return last_error;
}
bool paths_check_timestamp(const char* const* paths, usec_t *timestamp, bool update) {
@@ -800,7 +826,9 @@ static int binary_is_good(const char *binary) {
_cleanup_free_ char *p = NULL, *d = NULL;
int r;
- r = find_binary(binary, true, &p);
+ r = find_binary(binary, &p);
+ if (r == -ENOENT)
+ return 0;
if (r < 0)
return r;
@@ -808,28 +836,38 @@ static int binary_is_good(const char *binary) {
* fsck */
r = readlink_malloc(p, &d);
- if (r >= 0 &&
- (path_equal(d, "/bin/true") ||
- path_equal(d, "/usr/bin/true") ||
- path_equal(d, "/dev/null")))
- return -ENOENT;
+ if (r == -EINVAL) /* not a symlink */
+ return 1;
+ if (r < 0)
+ return r;
- return 0;
+ return !path_equal(d, "true") &&
+ !path_equal(d, "/bin/true") &&
+ !path_equal(d, "/usr/bin/true") &&
+ !path_equal(d, "/dev/null");
}
int fsck_exists(const char *fstype) {
const char *checker;
- checker = strjoina("fsck.", fstype);
+ assert(fstype);
+
+ if (streq(fstype, "auto"))
+ return -EINVAL;
+ checker = strjoina("fsck.", fstype);
return binary_is_good(checker);
}
int mkfs_exists(const char *fstype) {
const char *mkfs;
- mkfs = strjoina("mkfs.", fstype);
+ assert(fstype);
+ if (streq(fstype, "auto"))
+ return -EINVAL;
+
+ mkfs = strjoina("mkfs.", fstype);
return binary_is_good(mkfs);
}
@@ -866,3 +904,35 @@ char *prefix_root(const char *root, const char *path) {
strcpy(p, path);
return n;
}
+
+int parse_path_argument_and_warn(const char *path, bool suppress_root, char **arg) {
+ char *p;
+ int r;
+
+ /*
+ * This function is intended to be used in command line
+ * parsers, to handle paths that are passed in. It makes the
+ * path absolute, and reduces it to NULL if omitted or
+ * root (the latter optionally).
+ *
+ * NOTE THAT THIS WILL FREE THE PREVIOUS ARGUMENT POINTER ON
+ * SUCCESS! Hence, do not pass in uninitialized pointers.
+ */
+
+ if (isempty(path)) {
+ *arg = mfree(*arg);
+ return 0;
+ }
+
+ r = path_make_absolute_cwd(path, &p);
+ if (r < 0)
+ return log_error_errno(r, "Failed to parse path \"%s\" and make it absolute: %m", path);
+
+ path_kill_slashes(p);
+ if (suppress_root && path_equal(p, "/"))
+ p = mfree(p);
+
+ free(*arg);
+ *arg = p;
+ return 0;
+}
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2024-07-28 06:31:52 +0000