First commit

Signed-off-by: Mattias Andrée <maandree@kth.se>

1 files changed, 51 insertions, 0 deletions

diff --git a/libexec_copy_environ.c b/libexec_copy_environ.c
new file mode 100644
index 0000000..2c7e19f
--- /dev/null
+++ b/libexec_copy_environ.c
@@ -0,0 +1,51 @@
+/* See LICENSE file for copyright and license details. */
+#include "common.h"
+#ifndef TEST
+
+
+int
+libexec_copy_environ(struct libexec_command *cmd, const char *const *env)
+{
+	size_t i, n;
+	char **new_env;
+
+	if (!cmd) {
+		errno = EINVAL;
+		return -1;
+	}
+
+	if (!env)
+		env = *(const char *const **)(void *)&environ;
+
+	n = 0;
+	while (env[n])
+		n++;
+
+	new_env = calloc((n + 1), sizeof(*cmd->environ));
+	if (!new_env)
+		return -1;
+
+	for (i = 0; i < n; i++) {
+		new_env[i] = strdup(env[i]);
+		if (!new_env[i]) {
+			while (i--)
+				free(new_env[i]);
+			free(new_env);
+			return -1;
+		}
+	}
+
+	if (cmd->environ) {
+		for (i = 0; cmd->environ[i]; i++)
+			free(cmd->environ[i]);
+		free(cmd->environ);
+	}
+
+	cmd->environ = new_env;
+	return 0;
+}
+
+
+#else
+LIBEXEC_CONST__ int main(void) {return 0;} /* TODO test */
+#endif