[PATCH 7/8] virsh: support single quote

[Lai Jiangshan <laijs@xxxxxxxxxxxxxx>]

Some use may type command like this at the virsh shell:
virsh # somecmd 'some arg'

because some users often use single quote in linux shell.

Signed-off-by: Lai Jiangshan <laijs@xxxxxxxxxxxxxx>
---
diff --git a/tools/virsh.c b/tools/virsh.c
index b96071d..a5b438b 100644
--- a/tools/virsh.c
+++ b/tools/virsh.c
@@ -10213,6 +10213,7 @@ static int vshCommandArgvParse(vshControl *ctl, int nargs, char **argv)
 static int
 vshCommandStringGetArg(vshControl *ctl, vshCommandParser *parser, char **res)
 {
+    bool single_quote = false;
     bool double_quote = false;
     int sz = 0;
     char *p = parser->pos, *q;
@@ -10232,14 +10233,23 @@ vshCommandStringGetArg(vshControl *ctl, vshCommandParser *parser, char **res)
 copy:
     while (*p) {
         /* end of token is blank space or ';' */
-        if (!double_quote && (*p == ' ' || *p == '\t' || *p == ';'))
+        if (!double_quote && !single_quote
+                && (*p == ' ' || *p == '\t' || *p == ';'))
             break;
 
-        if (*p == '\\') { /* escape */
+        if (!double_quote && *p == '\'') { /* single quote */
+            single_quote = !single_quote;
+            p++;
+            continue;
+        } else if (!single_quote && *p == '\\') { /* escape */
+            /*
+             * The same as the bash, a \ in "" is an escaper,
+             * but a \ in '' is not an escaper.
+             */
             p++;
             if (*p == '\0')
                 break;
-        } else if (*p == '"') { /* double quote */
+        } else if (!single_quote && *p == '"') { /* double quote */
             double_quote = !double_quote;
             p++;
             continue;

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