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authorLaurent Bercot <ska-skaware@skarnet.org>2014-09-18 18:55:44 +0000
committerLaurent Bercot <ska-skaware@skarnet.org>2014-09-18 18:55:44 +0000
commit3534b428629be185e096be99e3bd5fdfe32d5544 (patch)
tree210ef3198ed66bc7f7b7bf6a85e4579f455e5a36 /src/libstddjb/realpath_tmp.c
downloadskalibs-3534b428629be185e096be99e3bd5fdfe32d5544.tar.xz
initial commit with rc for skalibs-2.0.0.0
Diffstat (limited to 'src/libstddjb/realpath_tmp.c')
-rw-r--r--src/libstddjb/realpath_tmp.c26
1 files changed, 26 insertions, 0 deletions
diff --git a/src/libstddjb/realpath_tmp.c b/src/libstddjb/realpath_tmp.c
new file mode 100644
index 0000000..8f877dd
--- /dev/null
+++ b/src/libstddjb/realpath_tmp.c
@@ -0,0 +1,26 @@
+/* ISC license. */
+
+#include <limits.h>
+#include <errno.h>
+#include <skalibs/bytestr.h>
+#include <skalibs/stralloc.h>
+#include <skalibs/djbunix.h>
+
+#ifndef PATH_MAX
+# define PATH_MAX 4095
+#endif
+
+char *realpath_tmp (char const *name, char *buf, stralloc *tmp)
+{
+ unsigned int tmpbase = tmp->len ;
+ if (sarealpath(tmp, name) == -1) return (char *)0 ;
+ if (tmp->len - tmpbase > PATH_MAX)
+ {
+ tmp->len = tmpbase ;
+ return (errno = ENAMETOOLONG, (char *)0) ;
+ }
+ byte_copy(buf, tmp->len - tmpbase, tmp->s + tmpbase) ;
+ buf[tmp->len - tmpbase] = 0 ;
+ tmp->len = tmpbase ;
+ return buf ;
+}