X-Git-Url: https://git.distorted.org.uk/~mdw/sgt/putty/blobdiff_plain/9fab77dc00ff2183dd642f4f088d2d54ed3d5887..e50f98bce64b2e3012c2cc6c39b5c21df3acd700:/unix/uxmisc.c

diff --git a/unix/uxmisc.c b/unix/uxmisc.c
index 8239158e..d1afa44a 100644
--- a/unix/uxmisc.c
+++ b/unix/uxmisc.c
@@ -3,7 +3,10 @@
  */
 
 #include <stdio.h>
+#include <unistd.h>
 #include <sys/time.h>
+#include <sys/types.h>
+#include <pwd.h>
 
 #include "putty.h"
 
@@ -18,6 +21,8 @@ unsigned long getticks(void)
     return tv.tv_sec * 1000000 + tv.tv_usec;
 }
 
+
+
 Filename filename_from_str(const char *str)
 {
     Filename ret;
@@ -40,3 +45,59 @@ int filename_is_null(Filename fn)
 {
     return !*fn.path;
 }
+
+#ifdef DEBUG
+static FILE *debug_fp = NULL;
+
+void dputs(char *buf)
+{
+    if (!debug_fp) {
+	debug_fp = fopen("debug.log", "w");
+    }
+
+    write(1, buf, strlen(buf));
+
+    fputs(buf, debug_fp);
+    fflush(debug_fp);
+}
+#endif
+
+char *get_username(void)
+{
+    struct passwd *p;
+    uid_t uid = getuid();
+    char *user, *ret = NULL;
+
+    /*
+     * First, find who we think we are using getlogin. If this
+     * agrees with our uid, we'll go along with it. This should
+     * allow sharing of uids between several login names whilst
+     * coping correctly with people who have su'ed.
+     */
+    user = getlogin();
+    setpwent();
+    if (user)
+	p = getpwnam(user);
+    else
+	p = NULL;
+    if (p && p->pw_uid == uid) {
+	/*
+	 * The result of getlogin() really does correspond to
+	 * our uid. Fine.
+	 */
+	ret = user;
+    } else {
+	/*
+	 * If that didn't work, for whatever reason, we'll do
+	 * the simpler version: look up our uid in the password
+	 * file and map it straight to a name.
+	 */
+	p = getpwuid(uid);
+	if (!p)
+	    return NULL;
+	ret = p->pw_name;
+    }
+    endpwent();
+
+    return dupstr(ret);
+}