Add spawn wrapper for executing external commands

Inctroduce process.c and process.h providing spawn() function to fork
a child process and execute commands via execvp().

Return -1 on invalid arguments or fork failure, and 0 on success.

1 files changed, 6 insertions, 0 deletions

diff --git a/src/process.h b/src/process.h
new file mode 100644
index 0000000..b817fa9
--- /dev/null
+++ b/src/process.h
@@ -0,0 +1,6 @@
+#ifndef SF_PROCESS_H
+#define SF_PROCESS_H
+
+int spawn(char **argv);
+
+#endif /* SF_PROCESS_H */