Adder the type alias error_t and refactored the code to use it. also extracted archive function from install.c to archives.c

src/archives.c

@@ -0,0 +1,96 @@
+#include "archives.h"
+#include "file.h"
+
+#include <sys/wait.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <stdio.h>
+#include <glib.h>
+
+int unzip(char * path, char * outdir) {
+	char * const args[] = {
+		"unzip",
+		"-LL", // to lowercase
+		"-q",
+		path,
+		"-d",
+		outdir,
+		NULL
+	};
+
+	pid_t pid = fork();
+
+	if(pid == 0) {
+		execv("/usr/bin/unzip", args);
+		return EXIT_FAILURE;
+	} else {
+		int returnValue;
+		waitpid(pid, &returnValue, 0);
+
+		if(returnValue != 0) {
+			fprintf(stderr, "\nFailed to decompress archive\n");
+		}
+		return returnValue;
+	}
+}
+
+int unrar(char * path, char * outdir) {
+	char * const args[] = {
+		"unrar",
+		"x",
+		"-y", //assume yes
+		"-cl", // to lowercase
+		path,
+		outdir,
+		NULL
+	};
+
+	pid_t pid = fork();
+
+	if(pid == 0) {
+		execv("/usr/bin/unrar", args);
+		return EXIT_FAILURE;
+	} else {
+		int returnValue;
+		waitpid(pid, &returnValue, 0);
+
+		if(returnValue != 0) {
+			fprintf(stderr, "\nFailed to decompress archive\n");
+		}
+		return returnValue;
+	}
+}
+
+
+int un7z(char * path, const char * outdir) {
+	gchar * outParameter = g_strjoin("", "-o", outdir, NULL);
+
+	char * const args[] = {
+		"7z",
+		"-y", //assume yes
+		"x",
+		path,
+		outParameter,
+		NULL
+	};
+
+	pid_t pid = fork();
+
+	if(pid == 0) {
+		execv("/usr/bin/7z", args);
+		return EXIT_FAILURE;
+	} else {
+		g_free(outParameter);
+		int returnValue;
+		waitpid(pid, &returnValue, 0);
+
+		if(returnValue != 0) {
+			fprintf(stderr, "\nFailed to decompress archive\n");
+			return returnValue;
+		}
+		//make everything lowercase since 7z don't have an argument for that.
+		casefold(outdir);
+		return returnValue;
+	}
+}