Add -E option for variable autoimport

1 files changed, 36 insertions, 0 deletions

diff --git a/src/libexecline/el_modif_and_exec.c b/src/libexecline/el_modif_and_exec.c
new file mode 100644
index 0000000..e2a3618
--- /dev/null
+++ b/src/libexecline/el_modif_and_exec.c
@@ -0,0 +1,36 @@
+/* ISC license. */
+
+#include <string.h>
+
+#include <skalibs/env.h>
+#include <skalibs/exec.h>
+
+#include <execline/config.h>
+#include <execline/execline.h>
+
+void el_modif_and_exec (char const *const *argv, char const *var, char const *value, int doimport)
+{
+  size_t varlen = strlen(var) ;
+  size_t modiflen = value ? varlen + strlen(value) + 2 : 1 ;
+  char modifs[modiflen] ;
+  if (value)
+  {
+    memcpy(modifs, var, varlen) ;
+    modifs[varlen] = '=' ;
+    memcpy(modifs + varlen + 1, value, modiflen - varlen - 1) ;
+  }
+  if (doimport)
+  {
+    size_t m = 0 ;
+    char const *newargv[env_len(argv) + 6] ;
+    newargv[m++] = EXECLINE_BINPREFIX "importas" ;
+    newargv[m++] = "-ui" ;
+    newargv[m++] = "--" ;
+    newargv[m++] = var ;
+    newargv[m++] = var ;
+    while (*argv) newargv[m++] = *argv++ ;
+    newargv[m++] = 0 ;
+    xmexec0_n(newargv, value ? modifs : var, value ? modiflen : varlen + 1, 1) ;
+  }
+  else xmexec0_n(argv, value ? modifs : var, value ? modiflen : varlen + 1, 1) ;
+}