Update README.md

* Add environment.c

3 files changed, 79 insertions, 2 deletions

diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 8981122..0d53e9b 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -3,7 +3,7 @@ include_directories(
 	${CMAKE_BINARY_DIR}/include
 )
 
-add_executable(spm spm.c config.c compat.c deps.c fs.c rpath.c find.c shell.c archive.c strings.c relocation.c install.c config_global.c manifest.c checksum.c extern/url.c version_spec.c spm_build.c mime.c internal_cmd.c)
+add_executable(spm spm.c config.c compat.c deps.c fs.c rpath.c find.c shell.c archive.c strings.c relocation.c install.c config_global.c manifest.c checksum.c extern/url.c version_spec.c spm_build.c mime.c internal_cmd.c environment.c)
 target_link_libraries(spm rt crypto ssl curl)
 
 if(MSVC)
diff --git a/src/environment.c b/src/environment.c
new file mode 100644
index 0000000..d338e4a
--- /dev/null
+++ b/src/environment.c
@@ -0,0 +1,77 @@
+/**
+ * @file environment.c
+ */
+#include "spm.h"
+
+/**
+ *
+ * @param env
+ */
+void runtime_export(char **env) {
+    char *borne[] = {
+            "bash",
+            "dash",
+            "zsh",
+            NULL,
+    };
+    char *unborne[] = {
+            "csh"
+            "tcsh",
+            NULL,
+    };
+
+    char output[BUFSIZ];
+    char export_command[7]; // export=6 and setenv=6... convenient
+    char *_sh = getenv("SHELL");
+    char *sh = basename(_sh);
+    if (sh == NULL) {
+        fprintf(stderr, "echo SHELL environment variable is not defined");
+        exit(1);
+    }
+
+    for (size_t i = 0; borne[i] != NULL; i++) {
+        if (strcmp(sh, borne[i]) == 0) {
+            strcpy(export_command, "export");
+            break;
+        }
+    }
+    for (size_t i = 0; unborne[i] != NULL; i++) {
+        if (strcmp(sh, unborne[i]) == 0) {
+            strcpy(export_command, "setenv");
+            break;
+        }
+    }
+
+    for (size_t i = 0; env[i] != NULL; i++) {
+        char **pair = split(env[i], "=");
+        sprintf(output, "%s %s=\"%s\"", export_command, pair[0], pair[1] ? pair[1] : "");
+        puts(output);
+        split_free(pair);
+    }
+}
+
+/**
+ *
+ * @param env
+ * @return
+ */
+char **runtime_copy(char **env) {
+    char **envp = NULL;
+    size_t env_count;
+    for (env_count = 0; env[env_count] != NULL; env_count++);
+
+    envp = (char **)calloc(env_count + 1, sizeof(char *));
+    for (size_t i = 0; i < env_count; i++) {
+        size_t len = strlen(env[i]);
+        envp[i] = (char *)calloc(len + 1, sizeof(char));
+        memcpy(envp[i], env[i], len);
+    }
+    return envp;
+}
+
+void runtime_free(char **env) {
+    for (size_t i = 0; env[i] != NULL; i++) {
+        free(env[i]);
+    }
+    free(env);
+}
\ No newline at end of file
diff --git a/src/spm.c b/src/spm.c
index 5759688..09538eb 100644
--- a/src/spm.c
+++ b/src/spm.c
@@ -24,7 +24,7 @@ void usage(const char *program_name) {
            , program_name);
 }
 
-int main(int argc, char *argv[]) {
+int main(int argc, char *argv[], char *arge[]) {
     char program_name[strlen(argv[0]) + 1];
     memset(program_name, '\0', sizeof(program_name) + 1);
     strcpy(program_name, basename(argv[0]));