#if !HAVE_CANONICALIZE_FILE_NAME || !FUNC_REALPATH_WORKS || defined _LIBC
+/* Don't use __attribute__ __nonnull__ in this compilation unit. Otherwise gcc
+ optimizes away the name == NULL test below. */
+#define _GL_ARG_NONNULL(params)
+
/* Specification. */
#include <stdlib.h>
if (name == NULL)
{
/* As per Single Unix Specification V2 we must return an error if
- either parameter is a null pointer. We extend this to allow
- the RESOLVED parameter to be NULL in case the we are expected to
- allocate the room for the return value. */
+ either parameter is a null pointer. We extend this to allow
+ the RESOLVED parameter to be NULL in case the we are expected to
+ allocate the room for the return value. */
__set_errno (EINVAL);
return NULL;
}
if (name[0] == '\0')
{
/* As per Single Unix Specification V2 we must return an error if
- the name argument points to an empty string. */
+ the name argument points to an empty string. */
__set_errno (ENOENT);
return NULL;
}
{
rpath = malloc (path_max);
if (rpath == NULL)
- {
- /* It's easier to set errno to ENOMEM than to rely on the
- 'malloc-posix' gnulib module. */
- errno = ENOMEM;
- return NULL;
- }
+ {
+ /* It's easier to set errno to ENOMEM than to rely on the
+ 'malloc-posix' gnulib module. */
+ errno = ENOMEM;
+ return NULL;
+ }
}
else
rpath = resolved;
if (name[0] != '/')
{
if (!__getcwd (rpath, path_max))
- {
- rpath[0] = '\0';
- goto error;
- }
+ {
+ rpath[0] = '\0';
+ goto error;
+ }
dest = strchr (rpath, '\0');
}
else
rpath[0] = '/';
dest = rpath + 1;
if (DOUBLE_SLASH_IS_DISTINCT_ROOT && name[1] == '/')
- *dest++ = '/';
+ *dest++ = '/';
}
for (start = end = name; *start; start = end)
/* Skip sequence of multiple path-separators. */
while (*start == '/')
- ++start;
+ ++start;
/* Find end of path component. */
for (end = start; *end && *end != '/'; ++end)
- /* Nothing. */;
+ /* Nothing. */;
if (end - start == 0)
- break;
+ break;
else if (end - start == 1 && start[0] == '.')
- /* nothing */;
+ /* nothing */;
else if (end - start == 2 && start[0] == '.' && start[1] == '.')
- {
- /* Back up to previous component, ignore if at root already. */
- if (dest > rpath + 1)
- while ((--dest)[-1] != '/');
- if (DOUBLE_SLASH_IS_DISTINCT_ROOT && dest == rpath + 1
- && *dest == '/')
- dest++;
- }
+ {
+ /* Back up to previous component, ignore if at root already. */
+ if (dest > rpath + 1)
+ while ((--dest)[-1] != '/');
+ if (DOUBLE_SLASH_IS_DISTINCT_ROOT && dest == rpath + 1
+ && *dest == '/')
+ dest++;
+ }
else
- {
- size_t new_size;
-
- if (dest[-1] != '/')
- *dest++ = '/';
-
- if (dest + (end - start) >= rpath_limit)
- {
- ptrdiff_t dest_offset = dest - rpath;
- char *new_rpath;
-
- if (resolved)
- {
- __set_errno (ENAMETOOLONG);
- if (dest > rpath + 1)
- dest--;
- *dest = '\0';
- goto error;
- }
- new_size = rpath_limit - rpath;
- if (end - start + 1 > path_max)
- new_size += end - start + 1;
- else
- new_size += path_max;
- new_rpath = (char *) realloc (rpath, new_size);
- if (new_rpath == NULL)
- {
- /* It's easier to set errno to ENOMEM than to rely on the
- 'realloc-posix' gnulib module. */
- errno = ENOMEM;
- goto error;
- }
- rpath = new_rpath;
- rpath_limit = rpath + new_size;
-
- dest = rpath + dest_offset;
- }
+ {
+ size_t new_size;
+
+ if (dest[-1] != '/')
+ *dest++ = '/';
+
+ if (dest + (end - start) >= rpath_limit)
+ {
+ ptrdiff_t dest_offset = dest - rpath;
+ char *new_rpath;
+
+ if (resolved)
+ {
+ __set_errno (ENAMETOOLONG);
+ if (dest > rpath + 1)
+ dest--;
+ *dest = '\0';
+ goto error;
+ }
+ new_size = rpath_limit - rpath;
+ if (end - start + 1 > path_max)
+ new_size += end - start + 1;
+ else
+ new_size += path_max;
+ new_rpath = (char *) realloc (rpath, new_size);
+ if (new_rpath == NULL)
+ {
+ /* It's easier to set errno to ENOMEM than to rely on the
+ 'realloc-posix' gnulib module. */
+ errno = ENOMEM;
+ goto error;
+ }
+ rpath = new_rpath;
+ rpath_limit = rpath + new_size;
+
+ dest = rpath + dest_offset;
+ }
#ifdef _LIBC
- dest = __mempcpy (dest, start, end - start);
+ dest = __mempcpy (dest, start, end - start);
#else
- memcpy (dest, start, end - start);
- dest += end - start;
+ memcpy (dest, start, end - start);
+ dest += end - start;
#endif
- *dest = '\0';
+ *dest = '\0';
#ifdef _LIBC
- if (__lxstat64 (_STAT_VER, rpath, &st) < 0)
+ if (__lxstat64 (_STAT_VER, rpath, &st) < 0)
#else
- if (lstat (rpath, &st) < 0)
+ if (lstat (rpath, &st) < 0)
#endif
- goto error;
-
- if (S_ISLNK (st.st_mode))
- {
- char *buf;
- size_t len;
-
- if (++num_links > MAXSYMLINKS)
- {
- __set_errno (ELOOP);
- goto error;
- }
-
- buf = malloca (path_max);
- if (!buf)
- {
- errno = ENOMEM;
- goto error;
- }
-
- n = __readlink (rpath, buf, path_max - 1);
- if (n < 0)
- {
- int saved_errno = errno;
- freea (buf);
- errno = saved_errno;
- goto error;
- }
- buf[n] = '\0';
-
- if (!extra_buf)
- {
- extra_buf = malloca (path_max);
- if (!extra_buf)
- {
- freea (buf);
- errno = ENOMEM;
- goto error;
- }
- }
-
- len = strlen (end);
- if ((long int) (n + len) >= path_max)
- {
- freea (buf);
- __set_errno (ENAMETOOLONG);
- goto error;
- }
-
- /* Careful here, end may be a pointer into extra_buf... */
- memmove (&extra_buf[n], end, len + 1);
- name = end = memcpy (extra_buf, buf, n);
-
- if (buf[0] == '/')
- {
- dest = rpath + 1; /* It's an absolute symlink */
- if (DOUBLE_SLASH_IS_DISTINCT_ROOT && buf[1] == '/')
- *dest++ = '/';
- }
- else
- {
- /* Back up to previous component, ignore if at root
- already: */
- if (dest > rpath + 1)
- while ((--dest)[-1] != '/');
- if (DOUBLE_SLASH_IS_DISTINCT_ROOT && dest == rpath + 1
- && *dest == '/')
- dest++;
- }
- }
- else if (!S_ISDIR (st.st_mode) && *end != '\0')
- {
- __set_errno (ENOTDIR);
- goto error;
- }
- }
+ goto error;
+
+ if (S_ISLNK (st.st_mode))
+ {
+ char *buf;
+ size_t len;
+
+ if (++num_links > MAXSYMLINKS)
+ {
+ __set_errno (ELOOP);
+ goto error;
+ }
+
+ buf = malloca (path_max);
+ if (!buf)
+ {
+ errno = ENOMEM;
+ goto error;
+ }
+
+ n = __readlink (rpath, buf, path_max - 1);
+ if (n < 0)
+ {
+ int saved_errno = errno;
+ freea (buf);
+ errno = saved_errno;
+ goto error;
+ }
+ buf[n] = '\0';
+
+ if (!extra_buf)
+ {
+ extra_buf = malloca (path_max);
+ if (!extra_buf)
+ {
+ freea (buf);
+ errno = ENOMEM;
+ goto error;
+ }
+ }
+
+ len = strlen (end);
+ if ((long int) (n + len) >= path_max)
+ {
+ freea (buf);
+ __set_errno (ENAMETOOLONG);
+ goto error;
+ }
+
+ /* Careful here, end may be a pointer into extra_buf... */
+ memmove (&extra_buf[n], end, len + 1);
+ name = end = memcpy (extra_buf, buf, n);
+
+ if (buf[0] == '/')
+ {
+ dest = rpath + 1; /* It's an absolute symlink */
+ if (DOUBLE_SLASH_IS_DISTINCT_ROOT && buf[1] == '/')
+ *dest++ = '/';
+ }
+ else
+ {
+ /* Back up to previous component, ignore if at root
+ already: */
+ if (dest > rpath + 1)
+ while ((--dest)[-1] != '/');
+ if (DOUBLE_SLASH_IS_DISTINCT_ROOT && dest == rpath + 1
+ && *dest == '/')
+ dest++;
+ }
+ }
+ else if (!S_ISDIR (st.st_mode) && *end != '\0')
+ {
+ __set_errno (ENOTDIR);
+ goto error;
+ }
+ }
}
if (dest > rpath + 1 && dest[-1] == '/')
--dest;
HCoop / bpt / guile.git / blobdiff