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Diffstat (limited to 'src/libstddjb/sagetcwd.c')
-rw-r--r--src/libstddjb/sagetcwd.c27
1 files changed, 27 insertions, 0 deletions
diff --git a/src/libstddjb/sagetcwd.c b/src/libstddjb/sagetcwd.c
new file mode 100644
index 0000000..d8c5dea
--- /dev/null
+++ b/src/libstddjb/sagetcwd.c
@@ -0,0 +1,27 @@
+/* ISC license. */
+
+#include <unistd.h>
+#include <errno.h>
+#include <skalibs/bytestr.h>
+#include <skalibs/stralloc.h>
+#include <skalibs/djbunix.h>
+
+int sagetcwd (stralloc *sa)
+{
+ unsigned int n = 128 ;
+ int wasnull = !sa->s ;
+
+ for (;;)
+ {
+ if (!stralloc_readyplus(sa, n)) goto err ;
+ if (getcwd(sa->s + sa->len, n)) break ;
+ if (errno != ERANGE) goto err ;
+ n += 128 ;
+ }
+ sa->len += str_len(sa->s + sa->len) ;
+ return 0 ;
+
+err:
+ if (wasnull) stralloc_free(sa) ;
+ return -1 ;
+}