Dedupe, implement support for getting steam directory

Signed-off-by: Ikey Doherty <ikey@solus-project.com>

src/common/files.c

@@ -15,11 +15,20 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
+#include <sys/stat.h>
 #include <unistd.h>
 
+#include "../common.h"
 #include "files.h"
+#include "nica/util.h"
 
-const char *lsi_get_home_dir(void)
+bool lsi_file_exists(const char *path)
+{
+        __lsi_unused__ struct stat st = { 0 };
+        return lstat(path, &st) == 0;
+}
+
+const char *lsi_get_home_dir()
 {
         char *c = NULL;
         struct passwd *p = NULL;
@@ -35,7 +44,7 @@ const char *lsi_get_home_dir(void)
         return p->pw_dir;
 }
 
-char *lsi_get_user_config_dir(void)
+char *lsi_get_user_config_dir()
 {
         const char *home = lsi_get_home_dir();
         char *c = NULL;
@@ -45,6 +54,36 @@ char *lsi_get_user_config_dir(void)
         return c;
 }
 
+/**
+ * Just use .local/share/Steam at this point..
+ */
+static inline char *lsi_get_fallback_steam_dir(const char *home)
+{
+        char *p = NULL;
+        if (asprintf(&p, "%s/.local/share/Steam", home) < 0) {
+                return NULL;
+        }
+        return p;
+}
+
+char *lsi_get_steam_dir()
+{
+        const char *homedir = NULL;
+        autofree(char) *candidate = NULL;
+        autofree(char) *resolv = NULL;
+
+        homedir = lsi_get_home_dir();
+        if (asprintf(&candidate, "%s/.steam/root", homedir) < 0) {
+                return NULL;
+        }
+
+        resolv = realpath(candidate, NULL);
+        if (!resolv || !lsi_file_exists(resolv)) {
+                return lsi_get_fallback_steam_dir(homedir);
+        }
+        return strdup(resolv);
+}
+
 /*
  * Editor modelines  -  https://www.wireshark.org/tools/modelines.html
  *

src/common/files.h

@@ -13,6 +13,7 @@
 
 #define _GNU_SOURCE
 
+#include <stdbool.h>
 #include <stdlib.h>
 
 /**
@@ -25,6 +26,16 @@ const char *lsi_get_home_dir(void);
  */
 char *lsi_get_user_config_dir(void);
 
+/**
+ * Find out where Steam is installed
+ */
+char *lsi_get_steam_dir(void);
+
+/**
+ * Quick helper to determine if the path exists
+ */
+bool lsi_file_exists(const char *path);
+
 /*
  * Editor modelines  -  https://www.wireshark.org/tools/modelines.html
  *

src/lsi/lsi.h

@@ -17,7 +17,6 @@
 #include <stdbool.h>
 #include <stdint.h>
 #include <stdlib.h>
-#include <sys/stat.h>
 #include <unistd.h>
 
 #include "../common.h"
@@ -97,15 +96,6 @@ __lsi_inline__ static inline const char *lsi_preload_list(void)
  */
 void lsi_report_failure(const char *s, ...);
 
-/**
- * Quick helper to determine if the path exists
- */
-__lsi_inline__ static inline bool lsi_file_exists(const char *path)
-{
-        __lsi_unused__ struct stat st = { 0 };
-        return lstat(path, &st) == 0;
-}
-
 /*
  * Editor modelines  -  https://www.wireshark.org/tools/modelines.html
  *

src/shim/shim.c

@@ -17,6 +17,7 @@
 #include <string.h>
 #include <unistd.h>
 
+#include "../common/files.h"
 #include "config.h"
 #include "lsi.h"