#164 add environment variable WD_MESSAGE to success cmd

alex-courtis · Nov 10, 2024 · bd5de3e · bd5de3e
1 parent 9cdc06b
commit bd5de3e
Show file tree

Hide file tree

Showing 3 changed files with 9 additions and 3 deletions.
diff --git a/inc/process.h b/inc/process.h
@@ -9,7 +9,7 @@ pid_t pid_active_server(void);
 
 void pid_file_create(void);
 
-void spawn_sh_cmd(const char * const command);
+void spawn_sh_cmd(const char * const command, char * const message);
 
 // exit; caller should return afterwards
 void wd_exit(int __status);

diff --git a/src/layout.c b/src/layout.c
@@ -365,7 +365,7 @@ void handle_success(void) {
 		log_info("\nExecuting CHANGE_SUCCESS_CMD:");
 		log_info("  %s", cfg->change_success_cmd);
 
-		spawn_sh_cmd(cfg->change_success_cmd);
+		spawn_sh_cmd(cfg->change_success_cmd, "handle_success");
 	}
 
 	log_info("\nChanges successful");

diff --git a/src/process.c b/src/process.c
@@ -104,7 +104,11 @@ void pid_file_create(void) {
 	free(path);
 }
 
-void spawn_sh_cmd(const char * const command) {
+void spawn_sh_cmd(const char * const command, char * const message) {
+
+	// experiments show that environment variable length tops out at 128k: variable itself plus contents
+	message[1024 * 120] = '\0';
+
 	pid_t pid = fork();
 	if (pid < 0) {
 		log_error_errno("\nfailed to fork");
@@ -121,6 +125,8 @@ void spawn_sh_cmd(const char * const command) {
 		sa.sa_handler = SIG_DFL;
 		sigaction(SIGCHLD, &sa, NULL);
 
+		setenv("WD_MESSAGE", message, 1);
+
 		// execute command in the child process
 		execl("/bin/sh", "/bin/sh", "-c", command, (char *)NULL);
 		log_error_errno("\nfailed to execute /bin/sh");