cache downloads and cleaning

1 files changed, 53 insertions, 0 deletions

diff --git a/snag/src/build_db.c b/snag/src/build_db.c
new file mode 100644
index 0000000..f2f4e01
--- /dev/null
+++ b/snag/src/build_db.c
@@ -0,0 +1,53 @@
+#include "build_db.h"
+#include "util.h"
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <sys/wait.h>
+#include <errno.h>
+
+#define PKG_BUILD_CMD "./scripts/run_pkg_build.sh"
+
+void package_run_install(const package_info_t* info) {
+
+	// PIPE and FORK to run install script
+    int pipefds[2] = {0};
+    if (pipe(pipefds) < 0) die("failed to pipe: %s", strerror(errno));
+    pid_t pid = fork();
+    if (pid < 0) die("failed to fork: %s", strerror(errno));
+
+    if (pid == 0) {
+		// child proc
+		// connect my stdout and stderr to the pipe
+        close(pipefds[0]);
+        dup2(pipefds[1], STDOUT_FILENO);
+        dup2(pipefds[1], STDERR_FILENO);
+        close(pipefds[1]);
+		// exec into install script
+        char* argv[] = { PKG_BUILD_CMD, info->script_path, NULL };
+        char* envp[] = { NULL };
+        execve(PKG_BUILD_CMD, argv, envp);
+		// what are you still doing here?
+		die("CHILD - execve to %s failed: %s", PKG_BUILD_CMD, strerror(errno));
+    } else {
+		// parent proc, close write end of pipe
+		close(pipefds[1]);
+	}
+
+	// read from the pipe until EOF
+	char buf[4096];
+	ssize_t bytes_read = 0;
+    while ((bytes_read = read(pipefds[0], buf, sizeof(buf))) > 0) {
+		// print build out, can log and stuff in future
+		printf("%.*s", (int)bytes_read, buf);
+	}
+    if (bytes_read < 0) die("failed to read from pipe: %s", strerror(errno));
+	close(pipefds[0]);
+
+	// reap the child to finish
+    int wstatus;
+    if (waitpid(pid, &wstatus, 0) < 0) die("waitpid failed: %s", strerror(errno));
+	if (WEXITSTATUS(wstatus) != 0) die("the child failed to execute install script");
+}