39521: Refactor start of execcmd().

By splitting into _analyse and _exec execpline2() has easier
access to the state at the start of execution.  Use this
to ensure we fork if this is a builtin with no arguments.

1 files changed, 16 insertions, 0 deletions

diff --git a/Src/zsh.h b/Src/zsh.h
index 79747d624..a5d4455e3 100644
--- a/Src/zsh.h
+++ b/Src/zsh.h
@@ -489,6 +489,7 @@ typedef struct complist  *Complist;
 typedef struct conddef   *Conddef;
 typedef struct dirsav    *Dirsav;
 typedef struct emulation_options *Emulation_options;
+typedef struct execcmd_params *Execcmd_params;
 typedef struct features  *Features;
 typedef struct feature_enables  *Feature_enables;
 typedef struct funcstack *Funcstack;
@@ -1391,6 +1392,21 @@ struct builtin {
  */
 #define BINF_ASSIGN		(1<<19)
 
+/**
+ * Parameters passed to execcmd().
+ * These are not opaque --- they are also used by the pipeline manager.
+ */
+struct execcmd_params {
+    LinkList args;		/* All command prefixes, arguments & options */
+    LinkList redir;		/* Redirections */
+    Wordcode beg;		/* The code at the start of the command */
+    Wordcode varspc;		/* The code for assignment parsed as such */
+    Wordcode assignspc;		/* The code for assignment parsed as typeset */
+    int type;			/* The WC_* type of the command */
+    int postassigns;		/* The number of assignspc assiguments */
+    int htok;			/* tokens in parameter list */
+};
+
 struct module {
     struct hashnode node;
     union {