From: Todd C. Miller <Todd.Miller@courtesan.com>
Date: Mon, 6 Jun 1994 00:04:06 +0000 (+0000)
Subject: for those w/o this in libc
X-Git-Tag: SUDO_1_3_1~182
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=2ff87dea0decf1fa83eef12de989a516b5481b09;p=sudo

for those w/o this in libc
---

diff --git a/realpath.c b/realpath.c
index 1e0474605..cc96d7a3a 100644
--- a/realpath.c
+++ b/realpath.c
@@ -104,7 +104,8 @@ char * realpath(old, new)
      * Resolve the last component of the path if it is a link
      * until it is a non-link.
      */
-    while ((statbuf.st_mode & _S_IFMT) == _S_IFLNK) {
+    errno = 0;
+    while (!lstat(new, &statbuf) && (statbuf.st_mode & _S_IFMT) == _S_IFLNK) {
 	/* it's a link */
 
 	if ((len = readlink(new, buf, sizeof(buf))) <= 0)
@@ -130,6 +131,10 @@ char * realpath(old, new)
 	}
     }
 
+    /* did an lstat() fail? */
+    if (errno)
+	return(realpath_ret(NULL, cwd));
+
     /*
      * separate the last component from the rest of the path
      * so we can do a getcwd() safely.
@@ -155,7 +160,7 @@ char * realpath(old, new)
     /* append "/" and buf to new but watch for double '/' */
     len = strlen(new);
     if (len) {
-	temp = new + len;
+	temp = new + len - 1;
 	if (*temp != '/') {
 	    *(++temp) = '/';
 	    *(++temp) = '\0';
diff --git a/sudo_realpath.c b/sudo_realpath.c
index 1e0474605..cc96d7a3a 100644
--- a/sudo_realpath.c
+++ b/sudo_realpath.c
@@ -104,7 +104,8 @@ char * realpath(old, new)
      * Resolve the last component of the path if it is a link
      * until it is a non-link.
      */
-    while ((statbuf.st_mode & _S_IFMT) == _S_IFLNK) {
+    errno = 0;
+    while (!lstat(new, &statbuf) && (statbuf.st_mode & _S_IFMT) == _S_IFLNK) {
 	/* it's a link */
 
 	if ((len = readlink(new, buf, sizeof(buf))) <= 0)
@@ -130,6 +131,10 @@ char * realpath(old, new)
 	}
     }
 
+    /* did an lstat() fail? */
+    if (errno)
+	return(realpath_ret(NULL, cwd));
+
     /*
      * separate the last component from the rest of the path
      * so we can do a getcwd() safely.
@@ -155,7 +160,7 @@ char * realpath(old, new)
     /* append "/" and buf to new but watch for double '/' */
     len = strlen(new);
     if (len) {
-	temp = new + len;
+	temp = new + len - 1;
 	if (*temp != '/') {
 	    *(++temp) = '/';
 	    *(++temp) = '\0';