X-Git-Url: http://git.marmaro.de/?p=mmh;a=blobdiff_plain;f=sbr%2Fmakedir.c;h=c5332ca6a91daad67aab986de4132908035d1541;hp=6cf9e03c29303f90aab20eb9612228cbd78c5760;hb=4885712264980e6cbc2039f9158027bee9213475;hpb=1691e80890e5d8ba258c51c214a3e91880e1db2b

diff --git a/sbr/makedir.c b/sbr/makedir.c
index 6cf9e03..c5332ca 100644
--- a/sbr/makedir.c
+++ b/sbr/makedir.c
@@ -3,6 +3,10 @@
  * makedir.c -- make a directory
  *
  * $Id$
+ *
+ * This code is Copyright (c) 2002, by the authors of nmh.  See the
+ * COPYRIGHT file in the root directory of the nmh distribution for
+ * complete copyright information.
  */
 
 /*
@@ -13,67 +17,104 @@
 #include <errno.h>
 #include <sys/param.h>
 #include <sys/file.h>
-
-extern int errno;
 	
 int
 makedir (char *dir)
 {
-    pid_t pid;
-    register char *cp;
-    register char *c;
-    char path[PATH_MAX];
+    char            path[PATH_MAX];
+    char*           folder_perms_ASCII;
+    int             had_an_error = 0;
+    mode_t          folder_perms, saved_umask;
+    pid_t           pid;
+    register char*  c;
 
     context_save();	/* save the context file */
     fflush(stdout);
 
-    if (getuid () == geteuid ()) {
-	    c = strncpy(path, dir, sizeof(path));     
+    if (!(folder_perms_ASCII = context_find ("folder-protect")))
+	folder_perms_ASCII = foldprot;  /* defaults to "700" */
+    
+    /* Because mh-profile.man documents "Folder-Protect:" as an octal constant,
+       and we don't want to force the user to remember to include a leading
+       zero, we call atooi(folder_perms_ASCII) here rather than
+       strtoul(folder_perms_ASCII, NULL, 0).  Therefore, if anyone ever tries to
+       specify a mode in say, hex, they'll get garbage.  (I guess nmh uses its
+       atooi() function rather than calling strtoul() with a radix of 8 because
+       some ancient platforms are missing that functionality. */
+    folder_perms = atooi(folder_perms_ASCII);
 
-	    while ((c = strchr((c + 1), '/')) != NULL) {	
-		    *c = (char)0;
-		    if (access(path, X_OK)) {
-			    if (errno != ENOENT){
-				    advise (dir, "unable to create directory");
-				    return 0;
-			    }			    
-			    if (mkdir(path, 0775)) {
-				    advise (dir, "unable to create directory");
-				    return 0;
-			    }
-		    }
-		    *c = '/';
-	    }
- 
-	    if (mkdir (dir, 0755) == -1) {
+    /* Folders have definite desired permissions that are set -- we don't want
+       to interact with the umask.  Clear it temporarily. */
+    saved_umask = umask(0);
+
+    if (getuid () == geteuid ()) {
+	c = strncpy(path, dir, sizeof(path));     
+	
+	while (!had_an_error && (c = strchr((c + 1), '/')) != NULL) {	
+	    *c = (char)0;
+	    if (access(path, X_OK)) {
+		if (errno != ENOENT){
 		    advise (dir, "unable to create directory");
-		    return 0;
+		    had_an_error = 1;
+		}
+		/* Create an outer directory. */
+		if (mkdir(path, folder_perms)) {
+		    advise (dir, "unable to create directory");
+		    had_an_error = 1;
+		}
 	    }
-    } else {
-	switch (pid = vfork()) {
-	case -1: 
-	    advise ("fork", "unable to");
-	    return 0;
-
-	case 0: 
-	    setgid (getgid ());
-	    setuid (getuid ());
+	    *c = '/';
+	}
 
-	    execl ("/bin/mkdir", "mkdir", dir, NULL);
-	    execl ("/usr/bin/mkdir", "mkdir", dir, NULL);
-	    fprintf (stderr, "unable to exec ");
-	    perror ("mkdir");
-	    _exit (-1);
+	if (!had_an_error) {
+	    /* Create the innermost nested subdirectory of the path we're being
+	       asked to create. */
+	    if (mkdir (dir, folder_perms) == -1) {
+		advise (dir, "unable to create directory");
+		had_an_error = 1;
+	    }
+	}
+    }
+    else {
+	/* Ummm, why do we want to avoid creating directories with the effective
+	   user ID?  None of the nmh tools are installed such that the effective
+	   should be different from the real, and if some parent process made
+	   the two be different, I don't see why it should be our job to enforce
+	   the real UID.  Also, why the heck do we call the mkdir executable
+	   rather than the library function in this case??  If we do want to
+	   call the mkdir executable, we should at least be giving it -p (and
+	   change the single chmod() call below) so it can successfully create
+	   nested directories like the above code can.
 
-	default: 
-	    if (pidXwait(pid, "mkdir"))
+	   -- Dan Harkless <dan-nmh@dilvish.speed.net> */
+	switch (pid = vfork()) {
+	    case -1: 
+		advise ("fork", "unable to");
 		return 0;
-	    break;
+		
+	    case 0: 
+		setgid (getgid ());
+		setuid (getuid ());
+		
+		execl ("/bin/mkdir", "mkdir", dir, NULL);
+		execl ("/usr/bin/mkdir", "mkdir", dir, NULL);
+		fprintf (stderr, "unable to exec ");
+		perror ("mkdir");
+		_exit (-1);
+		
+	    default: 
+		if (pidXwait(pid, "mkdir"))
+		    return 0;
+		break;
 	}
+
+	chmod (dir, folder_perms);
     }
 
-    if (!(cp = context_find ("folder-protect")))
-	cp = foldprot;
-    chmod (dir, atooi (cp));
-    return 1;
+    umask(saved_umask);  /* put the user's umask back */
+
+    if (had_an_error)
+	return 0;  /* opposite of UNIX error return convention */
+    else
+	return 1;
 }