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interjection.c

@@ -0,0 +1,122 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <signal.h>
+#include <errno.h>
+
+char VER[] = "1.0";
+
+char* GNU = NULL;
+char* Linux = NULL;
+
+void cleanExit(int err) {
+    fflush(stdout);
+    if (GNU != NULL) free(GNU);
+    if (Linux != NULL) free(Linux);
+    exit(err);
+}
+
+int main(int argc, char *argv[]) {
+
+    signal(SIGINT, cleanExit);
+
+    for (int i = 1; i < argc; i++) {
+        if (!strcmp(argv[i], "--version")) {
+            if (argc > 2) {fprintf(stderr, "Incorrent number of options passed.\n"); cleanExit(E2BIG);}
+            printf("Stallman Interjection Text Generator %s\n", VER);
+            printf("Copyright (C) 2021 PQCraft\n");            
+            cleanExit(0);
+        } else
+        if (!strcmp(argv[i], "--help")) {
+            if (argc > 2) {fprintf(stderr, "Incorrent number of options passed.\n"); cleanExit(E2BIG);}
+            printf("Usage: interject [options]\n");
+            printf("Options:\n");
+            printf("  --help              Shows the help screen.\n");
+            printf("  --version           Shows the version info.\n");
+            printf("  --gnu <text>        Changes all occurrences of 'GNU' to <text>.\n");
+            printf("  --linux <text>      Changes all occurrences of 'Linux' to <text>.\n");
+            cleanExit(0);
+        } else
+        if (!strcmp(argv[i], "--gnu")) {
+            if (GNU != NULL) {fprintf(stderr, "Cannot define 'GNU' more than once.\n"); cleanExit(E2BIG);}
+            i++;
+            if (i > argc - 1) {fprintf(stderr, "No value specified for 'GNU'.\n"); cleanExit(EINVAL);}
+            GNU = (char *)malloc(strlen(argv[i]) + 1);
+            strcpy(GNU, argv[i]);
+        } else
+        if (!strcmp(argv[i], "--linux")) {
+            if (Linux != NULL) {fprintf(stderr, "Cannot define 'Linux' more than once.\n"); cleanExit(E2BIG);}
+            i++;
+            if (i > argc - 1) {fprintf(stderr, "No value specified for 'Linux'.\n"); cleanExit(EINVAL);}
+            Linux = (char *)malloc(strlen(argv[i]) + 1);
+            strcpy(Linux, argv[i]);
+        } else {
+            fprintf(stderr, "Invalid option: %s\n", argv[i]);
+            cleanExit(EINVAL);
+        }
+    }
+
+    if (GNU == NULL) {GNU = malloc(4); strcpy(GNU, "GNU");}
+    if (Linux == NULL) {Linux = malloc(6); strcpy(Linux, "Linux");}
+
+    printf(
+
+        "I'd just like to interject for a moment.\n"
+        "What you’re referring to as %s, is in fact, %s/%s, or as I’ve recently taken to calling it, %s plus %s.\n"
+        "%s is not an operating system unto itself, but rather another free component of a fully functioning %s system made useful by the %s corelibs, shell utilities and vital system components comprising a full OS as defined by POSIX.\n"
+        "Many computer users run a modified version of the %s system every day, without realizing it.\n"
+        "Through a peculiar turn of events, the version of %s which is widely used today is often called “%s”, and many of its users are not aware that it is basically the %s system, developed by the %s Project.\n"
+        "There really is a %s, and these people are using it, but it is just a part of the system they use.\n"
+        "%s is the kernel: the program in the system that allocates the machine’s resources to the other programs that you run.\n"
+        "The kernel is an essential part of an operating system, but useless by itself; it can only function in the context of a complete operating system.\n"
+        "%s is normally used in combination with the %s operating system: the whole system is basically %s with %s added, or %s/%s.\n"
+        "All the so-called “%s” distributions are really distributions of %s/%s.\n",
+
+        Linux, GNU, Linux, GNU, Linux,
+        Linux, GNU, GNU,
+        GNU,
+        GNU, Linux, GNU, GNU,
+        Linux,
+        Linux,
+        Linux, GNU, GNU, Linux, GNU, Linux,
+        Linux, GNU, Linux
+
+    );
+
+    cleanExit(0);
+
+}
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