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-rw-r--r--abspath.c64
-rw-r--r--cache.h2
2 files changed, 48 insertions, 18 deletions
diff --git a/abspath.c b/abspath.c
index 6f15a418bb..39e06b5848 100644
--- a/abspath.c
+++ b/abspath.c
@@ -67,19 +67,15 @@ static void get_root_part(struct strbuf *resolved, struct strbuf *remaining)
#endif
/*
- * Return the real path (i.e., absolute path, with symlinks resolved
- * and extra slashes removed) equivalent to the specified path. (If
- * you want an absolute path but don't mind links, use
- * absolute_path().) Places the resolved realpath in the provided strbuf.
- *
- * The directory part of path (i.e., everything up to the last
- * dir_sep) must denote a valid, existing directory, but the last
- * component need not exist. If die_on_error is set, then die with an
- * informative error message if there is a problem. Otherwise, return
- * NULL on errors (without generating any output).
+ * If set, any number of trailing components may be missing; otherwise, only one
+ * may be.
*/
-char *strbuf_realpath(struct strbuf *resolved, const char *path,
- int die_on_error)
+#define REALPATH_MANY_MISSING (1 << 0)
+/* Should we die if there's an error? */
+#define REALPATH_DIE_ON_ERROR (1 << 1)
+
+static char *strbuf_realpath_1(struct strbuf *resolved, const char *path,
+ int flags)
{
struct strbuf remaining = STRBUF_INIT;
struct strbuf next = STRBUF_INIT;
@@ -89,7 +85,7 @@ char *strbuf_realpath(struct strbuf *resolved, const char *path,
struct stat st;
if (!*path) {
- if (die_on_error)
+ if (flags & REALPATH_DIE_ON_ERROR)
die("The empty string is not a valid path");
else
goto error_out;
@@ -101,7 +97,7 @@ char *strbuf_realpath(struct strbuf *resolved, const char *path,
if (!resolved->len) {
/* relative path; can use CWD as the initial resolved path */
if (strbuf_getcwd(resolved)) {
- if (die_on_error)
+ if (flags & REALPATH_DIE_ON_ERROR)
die_errno("unable to get current working directory");
else
goto error_out;
@@ -129,8 +125,9 @@ char *strbuf_realpath(struct strbuf *resolved, const char *path,
if (lstat(resolved->buf, &st)) {
/* error out unless this was the last component */
- if (errno != ENOENT || remaining.len) {
- if (die_on_error)
+ if (errno != ENOENT ||
+ (!(flags & REALPATH_MANY_MISSING) && remaining.len)) {
+ if (flags & REALPATH_DIE_ON_ERROR)
die_errno("Invalid path '%s'",
resolved->buf);
else
@@ -143,7 +140,7 @@ char *strbuf_realpath(struct strbuf *resolved, const char *path,
if (num_symlinks++ > MAXSYMLINKS) {
errno = ELOOP;
- if (die_on_error)
+ if (flags & REALPATH_DIE_ON_ERROR)
die("More than %d nested symlinks "
"on path '%s'", MAXSYMLINKS, path);
else
@@ -153,7 +150,7 @@ char *strbuf_realpath(struct strbuf *resolved, const char *path,
len = strbuf_readlink(&symlink, resolved->buf,
st.st_size);
if (len < 0) {
- if (die_on_error)
+ if (flags & REALPATH_DIE_ON_ERROR)
die_errno("Invalid symlink '%s'",
resolved->buf);
else
@@ -202,6 +199,37 @@ error_out:
return retval;
}
+/*
+ * Return the real path (i.e., absolute path, with symlinks resolved
+ * and extra slashes removed) equivalent to the specified path. (If
+ * you want an absolute path but don't mind links, use
+ * absolute_path().) Places the resolved realpath in the provided strbuf.
+ *
+ * The directory part of path (i.e., everything up to the last
+ * dir_sep) must denote a valid, existing directory, but the last
+ * component need not exist. If die_on_error is set, then die with an
+ * informative error message if there is a problem. Otherwise, return
+ * NULL on errors (without generating any output).
+ */
+char *strbuf_realpath(struct strbuf *resolved, const char *path,
+ int die_on_error)
+{
+ return strbuf_realpath_1(resolved, path,
+ die_on_error ? REALPATH_DIE_ON_ERROR : 0);
+}
+
+/*
+ * Just like strbuf_realpath, but allows an arbitrary number of path
+ * components to be missing.
+ */
+char *strbuf_realpath_forgiving(struct strbuf *resolved, const char *path,
+ int die_on_error)
+{
+ return strbuf_realpath_1(resolved, path,
+ ((die_on_error ? REALPATH_DIE_ON_ERROR : 0) |
+ REALPATH_MANY_MISSING));
+}
+
char *real_pathdup(const char *path, int die_on_error)
{
struct strbuf realpath = STRBUF_INIT;
diff --git a/cache.h b/cache.h
index 8d279bc110..487ebab8b0 100644
--- a/cache.h
+++ b/cache.h
@@ -1325,6 +1325,8 @@ static inline int is_absolute_path(const char *path)
int is_directory(const char *);
char *strbuf_realpath(struct strbuf *resolved, const char *path,
int die_on_error);
+char *strbuf_realpath_forgiving(struct strbuf *resolved, const char *path,
+ int die_on_error);
char *real_pathdup(const char *path, int die_on_error);
const char *absolute_path(const char *path);
char *absolute_pathdup(const char *path);