1 files changed, 27 insertions, 0 deletions
diff --git a/src/execline/export.c b/src/execline/export.c
new file mode 100644
index 0000000..e7a7bbe
--- /dev/null
+++ b/src/execline/export.c
@@ -0,0 +1,27 @@
+/* ISC license. */
+
+#include <skalibs/bytestr.h>
+#include <skalibs/strerr2.h>
+#include <skalibs/env.h>
+#include <skalibs/djbunix.h>
+
+#define USAGE "export variable value prog..."
+
+int main (int argc, char const *const *argv, char const *const *envp)
+{
+  unsigned int len1 ;
+  PROG = "export" ;
+  if (argc < 4) strerr_dieusage(100, USAGE) ;
+  len1 = str_len(argv[1]) ;
+  if (byte_chr(argv[1], len1, '=') < len1)
+    strerr_dief2x(100, "invalid variable name: ", argv[1]) ;
+  {
+    unsigned int len2 = str_len(argv[2]) ;
+    char fmt[len1 + len2 + 2] ;
+    byte_copy(fmt, len1, argv[1]) ;
+    fmt[len1] = '=' ;
+    byte_copy(fmt + len1 + 1, len2 + 1, argv[2]) ;
+    pathexec_r(argv+3, envp, env_len(envp), fmt, len1 + len2 + 2) ;
+  }
+  strerr_dieexec(111, argv[3]) ;
+}