initial commit, writes args and pwd into a file

1 files changed, 61 insertions, 0 deletions

diff --git a/later.c b/later.c
new file mode 100644
index 0000000..5f59577
--- /dev/null
+++ b/later.c
@@ -0,0 +1,61 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+
+int main(int argc, char** argv) {
+    /* how it could work
+     *  - read in tokens
+     *  - wait for --
+     *  - after --, read everything in and save to the LATERFILE
+     *  - make sure to also save the PWD
+     *
+     * Format is:
+     * FROM <pwd>
+     * <command>
+     * --
+     *
+     */
+    char* laterfile_path = getenv("LATERFILE");
+    if (!laterfile_path || strlen(laterfile_path) == 0) {
+        printf("where's your LATERFILE?\n");
+        return 1;
+    }
+
+    FILE* laterfile = fopen(laterfile_path, "a");
+
+    // loop through the arguments
+    int argi = 1;
+    while (argi < argc && strncmp(argv[argi], "--", 2) != 0)
+        argi++;
+
+    if (argi == argc) {
+        printf("unrecognized arguments\n");
+        return 1;
+    }
+
+    argi++;  // go past the --
+
+    // determine the current working directory
+    char pwd[255];
+    getcwd(pwd, 254);
+
+    // TODO check err
+
+    // write the output
+    fwrite("FROM ", 1, 5, laterfile);
+    fwrite(pwd, 1, strlen(pwd), laterfile);
+    fwrite("\n", 1, 1, laterfile);
+
+    // write out the command
+    for (int i = argi; i < argc; i++) {
+        fwrite(argv[i], 1, strlen(argv[i]), laterfile);
+        fwrite(" ", 1, 1, laterfile);
+    }
+
+    // write the terminal
+    fwrite("\n--\n", 1, 4, laterfile);
+
+    return 0;
+}