atd

commit f91ba69db75fe9247939878002af97bd974a6c05
parent 3103e6f39f27efab0e4dea190c49fcc61ed0abfd
Author: Nihal Jere <nihal@nihaljere.xyz>
Date:   Tue, 18 May 2021 23:31:25 -0500

use union for extra command data

Diffstat:
M
atd.c
 | 
12
++++++------
M
atd.h
 | 
6
+++++-

2 files changed, 11 insertions(+), 7 deletions(-)
diff --git a/atd.c b/atd.c
@@ -75,12 +75,12 @@ ssize_t cmdadd(struct fdbuf fdbuf) {
             count++;
         }
 
-        cmd.data = malloc(count + 1);
-        if (cmd.data == NULL)
+        cmd.data.dial.num = malloc(count + 1);
+        if (cmd.data.dial.num == NULL)
             goto bad;
 
-        memcpy(cmd.data, num, count);
-        ((char*)cmd.data)[count] = '\0';
+        memcpy(cmd.data.dial.num, num, count);
+        ((char*)cmd.data.dial.num)[count] = '\0';
         
         fprintf(stderr, "received dial with number %s\n", cmd.data);
         break;
@@ -287,8 +287,8 @@ int main(int argc, char *argv[])
             if (!cmd.op)
                 continue;
 
-            if (cmd.data) {
-                len = snprintf(fdbufs[BACKEND].in, BUFSIZE, cmd_to_at[cmd.op], cmd.data);
+            if (cmd.op == CMD_DIAL) {
+                len = snprintf(fdbufs[BACKEND].in, BUFSIZE, cmd_to_at[cmd.op], cmd.data.dial.num);
             } else {
                 len = snprintf(fdbufs[BACKEND].in, BUFSIZE, cmd_to_at[cmd.op]);
             }
diff --git a/atd.h b/atd.h
@@ -11,7 +11,11 @@ enum ops {
 struct command {
     int index;
     enum ops op;
-    void *data;
+    union {
+        struct {
+            char *num;
+        } dial;
+    } data;
 };
 
 char *cmd_to_at[] = {