From 50de7cf286da508aa87d730fe67f1c1bb8f0c0fd Mon Sep 17 00:00:00 2001
From: zaihuaji <zaihuaji@gmail.com>
Date: Fri, 31 Jan 2025 13:08:38 -0600
Subject: [PATCH] add dsarch.c to rda_python_dsarch

---
 pyproject.toml                 |  4 +--
 src/rda_python_dsarch/dsarch.c | 48 ++++++++++++++++++++++++++++++++++
 2 files changed, 50 insertions(+), 2 deletions(-)
 create mode 100644 src/rda_python_dsarch/dsarch.c

diff --git a/pyproject.toml b/pyproject.toml
index f0d5441..deecee2 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -7,7 +7,7 @@ build-backend = "setuptools.build_meta"
 
 [project]
 name = "rda_python_dsarch"
-version = "1.0.2"
+version = "1.0.3"
 authors = [
   { name="Zaihua Ji", email="zji@ucar.edu" },
 ]
@@ -28,7 +28,7 @@ include-package-data = true
 where = ["src"]
 
 [tool.setuptools.package-data]
-"rda_pyhton_dsarch" = ["dsarch.usg"]
+"rda_pyhton_dsarch" = ["dsarch.usg", "dsarch.c"]
 
 [project.urls]
 "Homepage" = "https://github.com/NCAR/rda-python-dsarch"
diff --git a/src/rda_python_dsarch/dsarch.c b/src/rda_python_dsarch/dsarch.c
new file mode 100644
index 0000000..2ae3afc
--- /dev/null
+++ b/src/rda_python_dsarch/dsarch.c
@@ -0,0 +1,48 @@
+/***************************************************************************************\
+ *
+ *    Title: dsarch.c
+ *   Author: Zaihua Ji, zji@ucar.edu
+ *     Date: 2024-01-30
+ *  Purpose: C wrapper to setuid for dsarch python scripts
+ *
+ * Instruction:
+ *
+ *    dsarch.c $LOCHOME/bin/dsarch.c
+ *    cd $LOCHOME/bin/
+ *    gcc -o dsarch dsarch.c
+ *    chmod 4750 dsarch
+ *
+ *    $LOCHOME: /usr/local/decs On DECS machines, and /ncar/rda/setuid on DAV
+ *    $ENVHOME: /glade/u/home/rdadata/rdamsenv on DECS machines, and
+ *              /glade/work/zji/conda-envs/pg-rda on DAV
+ *
+ \***************************************************************************************/
+
+#include <sys/types.h>
+#include <unistd.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+/* main program */
+int main(int argc, char *argv[]) {
+   char *name;
+   char prog[128];
+   char pext[] = ".py";
+
+   strcpy(prog, getenv("ENVHOME"));
+   strcat(prog, "/bin/");
+   name = strrchr(argv[0], '/');
+   if(name == (char *)NULL) {
+      strcat(prog, argv[0]);
+   } else {
+      strcat(prog, ++name);
+   }
+   name = strrchr(prog, '.');
+   if(name == (char *)NULL || strcmp(name, pext) != 0) {
+      strcat(prog, pext);
+   }
+
+   /* call Python script */
+   execv(prog, argv);
+}