1 files changed, 72 insertions, 0 deletions
diff --git a/src/libexecline/el_modifs_and_exec.c b/src/libexecline/el_modifs_and_exec.c
new file mode 100644
index 0000000..fe0117c
--- /dev/null
+++ b/src/libexecline/el_modifs_and_exec.c
@@ -0,0 +1,72 @@
+/* ISC license. */
+
+#include <string.h>
+
+#include <skalibs/env.h>
+#include <skalibs/exec.h>
+
+#include <execline/config.h>
+#include <execline/execline.h>
+
+void el_modifs_and_exec (char const *const *argv, char const *const *vars, char const *const *values, size_t n, int doimport)
+{
+  size_t pos = 0 ;
+  size_t yeslen = 0 ;
+  size_t yesn = 0 ;
+  size_t modiflen = 0 ;
+  for (size_t i = 0 ; i < n ; i++)
+  {
+    size_t len = strlen(vars[i]) + 1 ;
+    modiflen += len ;
+    if (values[i])
+    {
+      yesn++ ;
+      yeslen += len ;
+      modiflen += 1 + strlen(values[i]) ;
+    }
+  }
+
+  char modifs[modiflen ? modiflen : 1] ;
+
+  for (size_t i = 0 ; i < n ; i++)
+  {
+    size_t len = strlen(vars[i]) ;
+    memcpy(modifs + pos, vars[i], len) ;
+    pos += len ;
+    if (values[i])
+    {
+      modifs[pos++] = '=' ;
+      len = strlen(values[i]) ;
+      memcpy(modifs + pos, values[i], len) ;
+      pos += len ;
+    }
+    modifs[pos++] = 0 ;
+  }
+
+  if (doimport && yesn)
+  {
+    size_t m = 0 ;
+    size_t ypos = 0 ;
+    char const *newargv[env_len(argv) + 3 + 5 * yesn] ;
+    char yesvars[yeslen ? yeslen : 1] ;
+    newargv[m++] = EXECLINE_BINPREFIX "multisubstitute" ;
+    for (size_t i = 0 ; i < n ; i++) if (values[i])
+    {
+      size_t len = strlen(vars[i]) + 1 ;
+      char *p = yesvars + ypos ;
+      newargv[m++] = " importas" ;
+      newargv[m++] = " -ui" ;
+      newargv[m++] = " --" ;
+      newargv[m++] = p ;
+      newargv[m++] = p ;
+      yesvars[ypos++] = ' ' ;
+      memcpy(yesvars + ypos, vars[i], len) ;
+      ypos += len ;
+    }
+    newargv[m++] = "" ;
+    while (*argv) newargv[m++] = *argv++ ;
+    newargv[m++] = 0 ;
+    xmexec0_n(newargv, modifs, modiflen, n) ;
+  }
+  else xmexec0_n(argv, modifs, modiflen, n) ;
+}