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-rw-r--r--examples/loadables/printenv.c71
1 files changed, 71 insertions, 0 deletions
diff --git a/examples/loadables/printenv.c b/examples/loadables/printenv.c
new file mode 100644
index 0000000..16f398f
--- /dev/null
+++ b/examples/loadables/printenv.c
@@ -0,0 +1,71 @@
+/*
+ * printenv -- minimal builtin clone of BSD printenv(1).
+ *
+ * usage: printenv [varname]
+ *
+ */
+
+#include <config.h>
+#include <stdio.h>
+
+#include "builtins.h"
+#include "shell.h"
+#include "bashgetopt.h"
+
+extern char **export_env;
+
+int
+printenv_builtin (list)
+ WORD_LIST *list;
+{
+ register char **envp;
+ int opt;
+ SHELL_VAR *var;
+
+ reset_internal_getopt ();
+ while ((opt = internal_getopt (list, "")) != -1)
+ {
+ switch (opt)
+ {
+ default:
+ builtin_usage ();
+ return (EX_USAGE);
+ }
+ }
+ list = loptend;
+
+ /* printenv */
+ if (list == 0)
+ {
+ maybe_make_export_env (); /* this allows minimal code */
+ for (envp = export_env; *envp; envp++)
+ printf ("%s\n", *envp);
+ return (EXECUTION_SUCCESS);
+ }
+
+ /* printenv varname */
+ var = find_variable (list->word->word);
+ if (var == 0 || (exported_p (var) == 0))
+ return (EXECUTION_FAILURE);
+
+ if (function_p (var))
+ print_var_function (var);
+ else
+ print_var_value (var, 0);
+
+ return (EXECUTION_SUCCESS);
+}
+
+char *printenv_doc[] = {
+ "print values of environment variables",
+ (char *)NULL
+};
+
+struct builtin printenv_struct = {
+ "printenv",
+ printenv_builtin,
+ BUILTIN_ENABLED,
+ printenv_doc,
+ "printenv [varname]",
+ 0
+};