110 lines
3.2 KiB
Objective-C
Executable File
110 lines
3.2 KiB
Objective-C
Executable File
//
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// NSFileManager+Authentication.m
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// Sparkle
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//
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// Created by Andy Matuschak on 3/9/06.
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// Copyright 2006 Andy Matuschak. All rights reserved.
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//
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// This code based on generous contribution from Allan Odgaard. Thanks, Allan!
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#import "sys/stat.h"
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#import <Security/Security.h>
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#import <unistd.h>
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#import <sys/stat.h>
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#import <dirent.h>
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@implementation NSFileManager (SUAuthenticationAdditions)
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- (BOOL)currentUserOwnsPath:(NSString *)oPath
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{
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char *path = (char *)[oPath fileSystemRepresentation];
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unsigned int uid = getuid();
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bool res = false;
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struct stat sb;
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if(stat(path, &sb) == 0)
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{
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if(sb.st_uid == uid)
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{
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res = true;
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if(sb.st_mode & S_IFDIR)
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{
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DIR* dir = opendir(path);
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struct dirent* entry = NULL;
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while(res && (entry = readdir(dir)))
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{
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if(strcmp(entry->d_name, ".") == 0 || strcmp(entry->d_name, "..") == 0)
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continue;
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char descend[strlen(path) + 1 + entry->d_namlen + 1];
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strcpy(descend, path);
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strcat(descend, "/");
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strcat(descend, entry->d_name);
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res = [self currentUserOwnsPath:[NSString stringWithUTF8String:descend]];
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}
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closedir(dir);
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}
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}
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}
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return res;
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}
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- (BOOL)_movePathWithForcedAuthentication:(NSString *)src toPath:(NSString *)dst
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{
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NSString *tmp = [[[dst stringByDeletingPathExtension] stringByAppendingString:@".old"] stringByAppendingPathExtension:[dst pathExtension]];
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BOOL res = NO;
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struct stat sb;
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if((stat([src UTF8String], &sb) != 0) || (stat([tmp UTF8String], &sb) == 0) || stat([dst UTF8String], &sb) != 0)
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return false;
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char* buf = NULL;
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asprintf(&buf,
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"mv -f \"$DST_PATH\" \"$TMP_PATH\" && "
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"mv -f \"$SRC_PATH\" \"$DST_PATH\" && "
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"rm -rf \"$TMP_PATH\" && "
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"chown -R %d:%d \"$DST_PATH\"",
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sb.st_uid, sb.st_gid);
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if(!buf)
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return false;
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AuthorizationRef auth;
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if(AuthorizationCreate(NULL, kAuthorizationEmptyEnvironment, kAuthorizationFlagDefaults, &auth) == errAuthorizationSuccess)
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{
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setenv("SRC_PATH", [src UTF8String], 1);
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setenv("DST_PATH", [dst UTF8String], 1);
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setenv("TMP_PATH", [tmp UTF8String], 1);
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sig_t oldSigChildHandler = signal(SIGCHLD, SIG_DFL);
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char const* arguments[] = { "-c", buf, NULL };
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if(AuthorizationExecuteWithPrivileges(auth, "/bin/sh", kAuthorizationFlagDefaults, (char**)arguments, NULL) == errAuthorizationSuccess)
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{
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int status;
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int pid = wait(&status);
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if(pid != -1 && WIFEXITED(status) && WEXITSTATUS(status) == 0)
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res = YES;
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}
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signal(SIGCHLD, oldSigChildHandler);
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}
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AuthorizationFree(auth, 0);
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free(buf);
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return res;
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}
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- (BOOL)movePathWithAuthentication:(NSString *)src toPath:(NSString *)dst
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{
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if ([[NSFileManager defaultManager] isWritableFileAtPath:dst] && [[NSFileManager defaultManager] isWritableFileAtPath:[dst stringByDeletingLastPathComponent]])
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{
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int tag = 0;
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BOOL result = [[NSWorkspace sharedWorkspace] performFileOperation:NSWorkspaceRecycleOperation source:[dst stringByDeletingLastPathComponent] destination:@"" files:[NSArray arrayWithObject:[dst lastPathComponent]] tag:&tag];
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result &= [[NSFileManager defaultManager] movePath:src toPath:dst handler:NULL];
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return result;
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}
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else
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{
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return [self _movePathWithForcedAuthentication:src toPath:dst];
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}
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}
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@end
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