/*
- * "$Id: process.c 7256 2008-01-25 00:48:54Z mike $"
+ * "$Id$"
*
- * Process management routines for the Common UNIX Printing System (CUPS).
+ * Process management routines for the CUPS scheduler.
*
- * Copyright 2007-2010 by Apple Inc.
- * Copyright 1997-2007 by Easy Software Products, all rights reserved.
+ * Copyright 2007-2014 by Apple Inc.
+ * Copyright 1997-2007 by Easy Software Products, all rights reserved.
*
- * These coded instructions, statements, and computer programs are the
- * property of Apple Inc. and are protected by Federal copyright
- * law. Distribution and use rights are outlined in the file "LICENSE.txt"
- * which should have been included with this file. If this file is
- * file is missing or damaged, see the license at "http://www.cups.org/".
- *
- * Contents:
- *
- * cupsdCreateProfile() - Create an execution profile for a subprocess.
- * cupsdDestroyProfile() - Delete an execution profile.
- * cupsdEndProcess() - End a process.
- * cupsdFinishProcess() - Finish a process and get its name.
- * cupsdStartProcess() - Start a process.
- * compare_procs() - Compare two processes.
- * cupsd_requote() - Make a regular-expression version of a string.
+ * These coded instructions, statements, and computer programs are the
+ * property of Apple Inc. and are protected by Federal copyright
+ * law. Distribution and use rights are outlined in the file "LICENSE.txt"
+ * which should have been included with this file. If this file is
+ * file is missing or damaged, see the license at "http://www.cups.org/".
*/
/*
#ifdef __APPLE__
# include <libgen.h>
#endif /* __APPLE__ */
-#ifdef HAVE_SANDBOX_H
-# define __APPLE_API_PRIVATE
-# include <sandbox.h>
-#endif /* HAVE_SANDBOX_H */
+#ifdef HAVE_POSIX_SPAWN
+# include <spawn.h>
+extern char **environ;
+#endif /* HAVE_POSIX_SPAWN */
/*
*/
void * /* O - Profile or NULL on error */
-cupsdCreateProfile(int job_id) /* I - Job ID or 0 for none */
+cupsdCreateProfile(int job_id, /* I - Job ID or 0 for none */
+ int allow_networking)/* I - Allow networking off machine? */
{
#ifdef HAVE_SANDBOX_H
- cups_file_t *fp; /* File pointer */
- char profile[1024], /* File containing the profile */
- cache[1024], /* Quoted CacheDir */
- request[1024], /* Quoted RequestRoot */
- root[1024], /* Quoted ServerRoot */
- temp[1024]; /* Quoted TempDir */
-
-
- if (!UseProfiles || RunUser)
+ cups_file_t *fp; /* File pointer */
+ char profile[1024], /* File containing the profile */
+ bin[1024], /* Quoted ServerBin */
+ cache[1024], /* Quoted CacheDir */
+ domain[1024], /* Domain socket, if any */
+ request[1024], /* Quoted RequestRoot */
+ root[1024], /* Quoted ServerRoot */
+ temp[1024]; /* Quoted TempDir */
+ const char *nodebug; /* " (with no-log)" for no debug */
+ cupsd_listener_t *lis; /* Current listening socket */
+
+
+ if (!UseSandboxing || Sandboxing == CUPSD_SANDBOXING_OFF)
{
/*
* Only use sandbox profiles as root...
*/
- cupsdLogMessage(CUPSD_LOG_DEBUG2, "cupsdCreateProfile(job_id=%d) = NULL",
- job_id);
+ cupsdLogMessage(CUPSD_LOG_DEBUG2, "cupsdCreateProfile(job_id=%d, allow_networking=%d) = NULL", job_id, allow_networking);
return (NULL);
}
if ((fp = cupsTempFile2(profile, sizeof(profile))) == NULL)
{
- cupsdLogMessage(CUPSD_LOG_DEBUG2, "cupsdCreateProfile(job_id=%d) = NULL",
- job_id);
+ cupsdLogMessage(CUPSD_LOG_DEBUG2, "cupsdCreateProfile(job_id=%d, allow_networking=%d) = NULL", job_id, allow_networking);
cupsdLogMessage(CUPSD_LOG_ERROR, "Unable to create security profile: %s",
strerror(errno));
return (NULL);
}
+ fchown(cupsFileNumber(fp), RunUser, Group);
+ fchmod(cupsFileNumber(fp), 0640);
+
+ cupsd_requote(bin, ServerBin, sizeof(bin));
cupsd_requote(cache, CacheDir, sizeof(cache));
cupsd_requote(request, RequestRoot, sizeof(request));
cupsd_requote(root, ServerRoot, sizeof(root));
cupsd_requote(temp, TempDir, sizeof(temp));
+ nodebug = LogLevel < CUPSD_LOG_DEBUG ? " (with no-log)" : "";
+
cupsFilePuts(fp, "(version 1)\n");
- cupsFilePuts(fp, "(debug deny)\n");
- cupsFilePuts(fp, "(allow default)\n");
- cupsFilePrintf(fp,
- "(deny file-write* file-read-data file-read-metadata\n"
- " (regex"
- " #\"^%s$\"" /* RequestRoot */
- " #\"^%s/\"" /* RequestRoot/... */
- " #\"^/Users$\""
- " #\"^/Users/\""
- "))\n",
- request, request);
+ if (Sandboxing == CUPSD_SANDBOXING_STRICT)
+ cupsFilePuts(fp, "(deny default)\n");
+ else
+ cupsFilePuts(fp, "(allow default)\n");
+ if (LogLevel >= CUPSD_LOG_DEBUG)
+ cupsFilePuts(fp, "(debug deny)\n");
+ cupsFilePuts(fp, "(import \"system.sb\")\n");
+ cupsFilePuts(fp, "(system-network)\n");
+ cupsFilePuts(fp, "(allow mach-per-user-lookup)\n");
+ cupsFilePuts(fp, "(allow ipc-posix-sem)\n");
+ cupsFilePuts(fp, "(allow ipc-posix-shm)\n");
+ cupsFilePuts(fp, "(allow ipc-sysv-shm)\n");
+ cupsFilePuts(fp, "(allow mach-lookup)\n");
+ if (!RunUser)
+ cupsFilePrintf(fp,
+ "(deny file-write* file-read-data file-read-metadata\n"
+ " (regex"
+ " #\"^/Users$\""
+ " #\"^/Users/\""
+ ")%s)\n", nodebug);
cupsFilePrintf(fp,
"(deny file-write*\n"
" (regex"
" #\"^/Library/\""
" #\"^/System$\""
" #\"^/System/\""
+ ")%s)\n",
+ root, root, nodebug);
+ /* Specifically allow applications to stat RequestRoot and some other system folders */
+ cupsFilePrintf(fp,
+ "(allow file-read-metadata\n"
+ " (regex"
+ " #\"^/$\"" /* / */
+ " #\"^/usr$\"" /* /usr */
+ " #\"^/Library$\"" /* /Library */
+ " #\"^/Library/Printers$\"" /* /Library/Printers */
+ " #\"^%s$\"" /* RequestRoot */
"))\n",
- root, root);
+ request);
+ /* Read and write TempDir, CacheDir, and other common folders */
+ cupsFilePuts(fp,
+ "(allow file-write* file-read-data file-read-metadata\n"
+ " (regex"
+ " #\"^/private/var/db/\""
+ " #\"^/private/var/folders/\""
+ " #\"^/private/var/lib/\""
+ " #\"^/private/var/log/\""
+ " #\"^/private/var/mysql/\""
+ " #\"^/private/var/run/\""
+ " #\"^/private/var/spool/\""
+ " #\"^/Library/Application Support/\""
+ " #\"^/Library/Caches/\""
+ " #\"^/Library/Logs/\""
+ " #\"^/Library/Preferences/\""
+ " #\"^/Library/WebServer/\""
+ " #\"^/Users/Shared/\""
+ "))\n");
+ cupsFilePrintf(fp,
+ "(deny file-write*\n"
+ " (regex #\"^%s$\")%s)\n",
+ request, nodebug);
+ cupsFilePrintf(fp,
+ "(deny file-write* file-read-data file-read-metadata\n"
+ " (regex #\"^%s/\")%s)\n",
+ request, nodebug);
cupsFilePrintf(fp,
"(allow file-write* file-read-data file-read-metadata\n"
" (regex"
" #\"^%s/\"" /* TempDir/... */
" #\"^%s$\"" /* CacheDir */
" #\"^%s/\"" /* CacheDir/... */
+ "))\n",
+ temp, temp, cache, cache);
+ /* Read common folders */
+ cupsFilePrintf(fp,
+ "(allow file-read-data file-read-metadata\n"
+ " (regex"
+ " #\"^/AppleInternal$\""
+ " #\"^/AppleInternal/\""
+ " #\"^/bin$\"" /* /bin */
+ " #\"^/bin/\"" /* /bin/... */
+ " #\"^/private$\""
+ " #\"^/private/etc$\""
+ " #\"^/private/etc/\""
+ " #\"^/private/tmp$\""
+ " #\"^/private/tmp/\""
+ " #\"^/private/var$\""
+ " #\"^/private/var/db$\""
+ " #\"^/private/var/folders$\""
+ " #\"^/private/var/lib$\""
+ " #\"^/private/var/log$\""
+ " #\"^/private/var/mysql$\""
+ " #\"^/private/var/run$\""
+ " #\"^/private/var/spool$\""
+ " #\"^/usr/bin$\"" /* /usr/bin */
+ " #\"^/usr/bin/\"" /* /usr/bin/... */
+ " #\"^/usr/libexec/cups$\"" /* /usr/libexec/cups */
+ " #\"^/usr/libexec/cups/\"" /* /usr/libexec/cups/... */
+ " #\"^/usr/libexec/fax$\"" /* /usr/libexec/fax */
+ " #\"^/usr/libexec/fax/\"" /* /usr/libexec/fax/... */
+ " #\"^/usr/sbin$\"" /* /usr/sbin */
+ " #\"^/usr/sbin/\"" /* /usr/sbin/... */
+ " #\"^/Library/Application Support$\""
+ " #\"^/Library/Application Support/\""
+ " #\"^/Library/Caches$\""
+ " #\"^/Library/Fonts$\""
+ " #\"^/Library/Fonts/\""
+ " #\"^/Library/Frameworks$\""
+ " #\"^/Library/Frameworks/\""
+ " #\"^/Library/Keychains$\""
+ " #\"^/Library/Keychains/\""
+ " #\"^/Library/Logs$\""
+ " #\"^/Library/Printers$\""
+ " #\"^/Library/Printers/\""
+ " #\"^/Library/Security$\""
+ " #\"^/Library/Security/\""
+ " #\"^/Library/WebServer$\""
" #\"^%s/Library$\"" /* RequestRoot/Library */
" #\"^%s/Library/\"" /* RequestRoot/Library/... */
- " #\"^/Library/Application Support/\""
- " #\"^/Library/Caches/\""
- " #\"^/Library/Preferences/\""
- " #\"^/Library/Printers/.*/\""
- " #\"^/Users/Shared/\""
+ " #\"^%s$\"" /* ServerBin */
+ " #\"^%s/\"" /* ServerBin/... */
+ " #\"^%s$\"" /* ServerRoot */
+ " #\"^%s/\"" /* ServerRoot/... */
"))\n",
- temp, temp, cache, cache, request, request);
- cupsFilePuts(fp,
- "(deny file-write*\n"
- " (regex"
- " #\"^/Library/Printers/PPDs$\""
- " #\"^/Library/Printers/PPDs/\""
- " #\"^/Library/Printers/PPD Plugins$\""
- " #\"^/Library/Printers/PPD Plugins/\""
- "))\n");
+ request, request, bin, bin, root, root);
+ if (Sandboxing == CUPSD_SANDBOXING_RELAXED)
+ {
+ /* Limited write access to /Library/Printers/... */
+ cupsFilePuts(fp,
+ "(allow file-write*\n"
+ " (regex"
+ " #\"^/Library/Printers/.*/\""
+ "))\n");
+ cupsFilePrintf(fp,
+ "(deny file-write*\n"
+ " (regex"
+ " #\"^/Library/Printers/PPDs$\""
+ " #\"^/Library/Printers/PPDs/\""
+ " #\"^/Library/Printers/PPD Plugins$\""
+ " #\"^/Library/Printers/PPD Plugins/\""
+ ")%s)\n", nodebug);
+ }
+ /* Allow execution of child processes as long as the programs are not in a user directory */
+ cupsFilePuts(fp, "(allow process*)\n");
+ cupsFilePuts(fp, "(deny process-exec (regex #\"^/Users/\"))\n");
+ if (RunUser && getenv("CUPS_TESTROOT"))
+ {
+ /* Allow source directory access in "make test" environment */
+ char testroot[1024]; /* Root directory of test files */
+
+ cupsd_requote(testroot, getenv("CUPS_TESTROOT"), sizeof(testroot));
+
+ cupsFilePrintf(fp,
+ "(allow file-write* file-read-data file-read-metadata\n"
+ " (regex"
+ " #\"^%s$\"" /* CUPS_TESTROOT */
+ " #\"^%s/\"" /* CUPS_TESTROOT/... */
+ "))\n",
+ testroot, testroot);
+ cupsFilePrintf(fp,
+ "(allow process-exec\n"
+ " (regex"
+ " #\"^%s/\"" /* CUPS_TESTROOT/... */
+ "))\n",
+ testroot);
+ }
if (job_id)
+ {
+ /* Allow job filters to read the current job files... */
cupsFilePrintf(fp,
"(allow file-read-data file-read-metadata\n"
- " (regex #\"^%s/([ac]%05d|d%05d-[0-9][0-9][0-9])$\"))\n",
+ " (regex #\"^%s/([ac]%05d|d%05d-[0-9][0-9][0-9])$\"))\n",
request, job_id, job_id);
-
+ }
+ else
+ {
+ /* Allow email notifications from notifiers... */
+ cupsFilePuts(fp,
+ "(allow process-exec\n"
+ " (literal \"/usr/sbin/sendmail\")\n"
+ " (with no-sandbox))\n");
+ }
+ /* Allow access to Bluetooth, USB, and notify_post. */
+ cupsFilePuts(fp, "(allow iokit*)\n");
+ cupsFilePuts(fp, "(allow distributed-notification-post)\n");
+ /* Allow outbound networking to local services */
+ cupsFilePuts(fp, "(allow network-outbound"
+ "\n (regex #\"^/private/var/run/\" #\"^/private/tmp/\")");
+ for (lis = (cupsd_listener_t *)cupsArrayFirst(Listeners);
+ lis;
+ lis = (cupsd_listener_t *)cupsArrayNext(Listeners))
+ {
+ if (httpAddrFamily(&(lis->address)) == AF_LOCAL)
+ {
+ httpAddrString(&(lis->address), domain, sizeof(domain));
+ cupsFilePrintf(fp, "\n (literal \"%s\")", domain);
+ }
+ }
+ if (allow_networking)
+ {
+ /* Allow TCP and UDP networking off the machine... */
+ cupsFilePuts(fp, "\n (remote tcp))\n");
+ cupsFilePuts(fp, "(allow network-bind)\n"); /* for LPD resvport */
+ cupsFilePuts(fp, "(allow network*\n"
+ " (local udp \"*:*\")\n"
+ " (remote udp \"*:*\"))\n");
+
+ /* Also allow access to device files... */
+ cupsFilePuts(fp, "(allow file-write* file-read-data file-read-metadata file-ioctl\n"
+ " (regex #\"^/dev/\"))\n");
+ }
+ else
+ {
+ /* Only allow SNMP (UDP) and LPD (TCP) off the machine... */
+ cupsFilePuts(fp, ")\n");
+ cupsFilePuts(fp, "(allow network-outbound\n"
+ " (remote udp \"*:161\")"
+ " (remote tcp \"*:515\"))\n");
+ cupsFilePuts(fp, "(allow network-inbound\n"
+ " (local udp \"localhost:*\"))\n");
+ }
cupsFileClose(fp);
- cupsdLogMessage(CUPSD_LOG_DEBUG2, "cupsdCreateProfile(job_id=%d) = \"%s\"",
- job_id, profile);
+ cupsdLogMessage(CUPSD_LOG_DEBUG2, "cupsdCreateProfile(job_id=%d,allow_networking=%d) = \"%s\"", job_id, allow_networking, profile);
return ((void *)strdup(profile));
#else
- cupsdLogMessage(CUPSD_LOG_DEBUG2, "cupsdCreateProfile(job_id=%d) = NULL",
- job_id);
+ cupsdLogMessage(CUPSD_LOG_DEBUG2, "cupsdCreateProfile(job_id=%d, allow_networking=%d) = NULL", job_id, allow_networking);
return (NULL);
#endif /* HAVE_SANDBOX_H */
if (!pid)
return (0);
- else if (force)
+
+ if (!RunUser)
+ {
+ /*
+ * When running as root, cupsd puts child processes in their own process
+ * group. Using "-pid" sends a signal to all processes in the group.
+ */
+
+ pid = -pid;
+ }
+
+ if (force)
return (kill(pid, SIGKILL));
else
return (kill(pid, SIGTERM));
*/
const char * /* O - Process name */
-cupsdFinishProcess(int pid, /* I - Process ID */
- char *name, /* I - Name buffer */
- int namelen, /* I - Size of name buffer */
- int *job_id) /* O - Job ID pointer or NULL */
+cupsdFinishProcess(int pid, /* I - Process ID */
+ char *name, /* I - Name buffer */
+ size_t namelen, /* I - Size of name buffer */
+ int *job_id) /* O - Job ID pointer or NULL */
{
cupsd_proc_t key, /* Search key */
*proc; /* Matching process */
strlcpy(name, "unknown", namelen);
}
- cupsdLogMessage(CUPSD_LOG_DEBUG2,
- "cupsdFinishProcess(pid=%d, name=%p, namelen=%d, "
- "job_id=%p(%d)) = \"%s\"", pid, name, namelen, job_id,
- job_id ? *job_id : 0, name);
+ cupsdLogMessage(CUPSD_LOG_DEBUG2, "cupsdFinishProcess(pid=%d, name=%p, namelen=" CUPS_LLFMT ", job_id=%p(%d)) = \"%s\"", pid, name, CUPS_LLCAST namelen, job_id, job_id ? *job_id : 0, name);
return (name);
}
cupsd_job_t *job, /* I - Job associated with process */
int *pid) /* O - Process ID */
{
- int user; /* Command UID */
- struct stat commandinfo; /* Command file information */
+ int i; /* Looping var */
+ const char *exec_path = command; /* Command to be exec'd */
+ char *real_argv[110], /* Real command-line arguments */
+ cups_exec[1024]; /* Path to "cups-exec" program */
+ uid_t user; /* Command UID */
cupsd_proc_t *proc; /* New process record */
-#if defined(HAVE_SIGACTION) && !defined(HAVE_SIGSET)
+#ifdef HAVE_POSIX_SPAWN
+ posix_spawn_file_actions_t actions; /* Spawn file actions */
+ posix_spawnattr_t attrs; /* Spawn attributes */
+ char user_str[16], /* User string */
+ group_str[16], /* Group string */
+ nice_str[16]; /* FilterNice string */
+#elif defined(HAVE_SIGACTION) && !defined(HAVE_SIGSET)
struct sigaction action; /* POSIX signal handler */
-#endif /* HAVE_SIGACTION && !HAVE_SIGSET */
+#endif /* HAVE_POSIX_SPAWN */
#if defined(__APPLE__)
char processPath[1024], /* CFProcessPath environment variable */
linkpath[1024]; /* Link path for symlinks... */
#endif /* __APPLE__ */
+ *pid = 0;
+
+ /*
+ * Figure out the UID for the child process...
+ */
+
if (RunUser)
user = RunUser;
else if (root)
else
user = User;
- if (stat(command, &commandinfo))
- {
- *pid = 0;
-
- cupsdLogMessage(CUPSD_LOG_DEBUG2,
- "cupsdStartProcess(command=\"%s\", argv=%p, envp=%p, "
- "infd=%d, outfd=%d, errfd=%d, backfd=%d, sidefd=%d, root=%d, "
- "profile=%p, job=%p(%d), pid=%p) = %d",
- command, argv, envp, infd, outfd, errfd, backfd, sidefd,
- root, profile, job, job ? job->id : 0, pid, *pid);
- cupsdLogMessage(CUPSD_LOG_ERROR, "Unable to execute %s: %s", command,
- strerror(errno));
-
- if (job && job->printer)
- {
- if (cupsdSetPrinterReasons(job->printer, "+cups-missing-filter-warning"))
- cupsdAddEvent(CUPSD_EVENT_PRINTER_STATE, job->printer, NULL,
- "Printer driver %s is missing.", command);
- }
-
- return (0);
- }
- else if (!RunUser &&
- ((commandinfo.st_mode & (S_ISUID | S_IWGRP | S_IWOTH)) ||
- commandinfo.st_uid))
- {
- *pid = 0;
-
- cupsdLogMessage(CUPSD_LOG_DEBUG2,
- "cupsdStartProcess(command=\"%s\", argv=%p, envp=%p, "
- "infd=%d, outfd=%d, errfd=%d, backfd=%d, sidefd=%d, root=%d, "
- "profile=%p, job=%p(%d), pid=%p) = %d",
- command, argv, envp, infd, outfd, errfd, backfd, sidefd,
- root, profile, job, job ? job->id : 0, pid, *pid);
- cupsdLogMessage(CUPSD_LOG_ERROR,
- "Unable to execute %s: insecure file permissions (0%o)",
- command, commandinfo.st_mode);
-
- if (job && job->printer)
- {
- if (cupsdSetPrinterReasons(job->printer, "+cups-insecure-filter-warning"))
- cupsdAddEvent(CUPSD_EVENT_PRINTER_STATE, job->printer, NULL,
- "Printer driver %s has insecure file permissions (0%o).",
- command, commandinfo.st_mode);
- }
-
- errno = EPERM;
-
- return (0);
- }
- else if ((commandinfo.st_uid != user || !(commandinfo.st_mode & S_IXUSR)) &&
- (commandinfo.st_gid != Group || !(commandinfo.st_mode & S_IXGRP)) &&
- !(commandinfo.st_mode & S_IXOTH))
- {
- *pid = 0;
+ /*
+ * Check the permissions of the command we are running...
+ */
- cupsdLogMessage(CUPSD_LOG_DEBUG2,
- "cupsdStartProcess(command=\"%s\", argv=%p, envp=%p, "
- "infd=%d, outfd=%d, errfd=%d, backfd=%d, sidefd=%d, root=%d, "
- "profile=%p, job=%p(%d), pid=%p) = %d",
- command, argv, envp, infd, outfd, errfd, backfd, sidefd,
- root, profile, job, job ? job->id : 0, pid, *pid);
- cupsdLogMessage(CUPSD_LOG_ERROR,
- "Unable to execute %s: no execute permissions (0%o)",
- command, commandinfo.st_mode);
-
- errno = EPERM;
+ if (_cupsFileCheck(command, _CUPS_FILE_CHECK_PROGRAM, !RunUser,
+ cupsdLogFCMessage, job ? job->printer : NULL))
return (0);
- }
#if defined(__APPLE__)
if (envp)
{
/*
- * Add special voodoo magic for Mac OS X - this allows Mac OS X
- * programs to access their bundle resources properly...
+ * Add special voodoo magic for OS X - this allows OS X programs to access
+ * their bundle resources properly...
*/
if ((linkbytes = readlink(command, linkpath, sizeof(linkpath) - 1)) > 0)
}
#endif /* __APPLE__ */
+ /*
+ * Use helper program when we have a sandbox profile...
+ */
+
+#ifndef HAVE_POSIX_SPAWN
+ if (profile)
+#endif /* !HAVE_POSIX_SPAWN */
+ {
+ snprintf(cups_exec, sizeof(cups_exec), "%s/daemon/cups-exec", ServerBin);
+ snprintf(user_str, sizeof(user_str), "%d", user);
+ snprintf(group_str, sizeof(group_str), "%d", Group);
+ snprintf(nice_str, sizeof(nice_str), "%d", FilterNice);
+
+ real_argv[0] = cups_exec;
+ real_argv[1] = (char *)"-g";
+ real_argv[2] = group_str;
+ real_argv[3] = (char *)"-n";
+ real_argv[4] = nice_str;
+ real_argv[5] = (char *)"-u";
+ real_argv[6] = user_str;
+ real_argv[7] = profile ? profile : "none";
+ real_argv[8] = (char *)command;
+
+ for (i = 0;
+ i < (int)(sizeof(real_argv) / sizeof(real_argv[0]) - 10) && argv[i];
+ i ++)
+ real_argv[i + 9] = argv[i];
+
+ real_argv[i + 9] = NULL;
+
+ argv = real_argv;
+ exec_path = cups_exec;
+ }
+
+ if (LogLevel == CUPSD_LOG_DEBUG2)
+ {
+ cupsdLogMessage(CUPSD_LOG_DEBUG2, "cupsdStartProcess: Preparing to start \"%s\", arguments:", command);
+
+ for (i = 0; argv[i]; i ++)
+ cupsdLogMessage(CUPSD_LOG_DEBUG2, "cupsdStartProcess: argv[%d] = \"%s\"", i, argv[i]);
+ }
+
+#ifdef HAVE_POSIX_SPAWN
+ /*
+ * Setup attributes and file actions for the spawn...
+ */
+
+ cupsdLogMessage(CUPSD_LOG_DEBUG2, "cupsdStartProcess: Setting spawn attributes.");
+ posix_spawnattr_init(&attrs);
+ posix_spawnattr_setflags(&attrs, POSIX_SPAWN_SETPGROUP | POSIX_SPAWN_SETSIGDEF);
+
+ cupsdLogMessage(CUPSD_LOG_DEBUG2, "cupsdStartProcess: Setting file actions.");
+ posix_spawn_file_actions_init(&actions);
+ if (infd != 0)
+ {
+ if (infd < 0)
+ posix_spawn_file_actions_addopen(&actions, 0, "/dev/null", O_WRONLY, 0);
+ else
+ posix_spawn_file_actions_adddup2(&actions, infd, 0);
+ }
+
+ if (outfd != 1)
+ {
+ if (outfd < 0)
+ posix_spawn_file_actions_addopen(&actions, 1, "/dev/null", O_WRONLY, 0);
+ else
+ posix_spawn_file_actions_adddup2(&actions, outfd, 1);
+ }
+
+ if (errfd != 2)
+ {
+ if (errfd < 0)
+ posix_spawn_file_actions_addopen(&actions, 2, "/dev/null", O_WRONLY, 0);
+ else
+ posix_spawn_file_actions_adddup2(&actions, errfd, 2);
+ }
+
+ if (backfd != 3 && backfd >= 0)
+ posix_spawn_file_actions_adddup2(&actions, backfd, 3);
+
+ if (sidefd != 4 && sidefd >= 0)
+ posix_spawn_file_actions_adddup2(&actions, sidefd, 4);
+
+ cupsdLogMessage(CUPSD_LOG_DEBUG2, "cupsdStartProcess: Calling posix_spawn.");
+
+ if (posix_spawn(pid, exec_path, &actions, &attrs, argv, envp ? envp : environ))
+ {
+ cupsdLogMessage(CUPSD_LOG_ERROR, "Unable to fork %s - %s.", command, strerror(errno));
+
+ *pid = 0;
+ }
+ else
+ cupsdLogMessage(CUPSD_LOG_DEBUG2, "cupsdStartProcess: pid=%d", (int)*pid);
+
+ posix_spawn_file_actions_destroy(&actions);
+ posix_spawnattr_destroy(&attrs);
+
+#else
/*
* Block signals before forking...
*/
if ((*pid = fork()) == 0)
{
/*
- * Child process goes here...
- *
- * Update stdin/stdout/stderr as needed...
+ * Child process goes here; update stderr as needed...
+ */
+
+ if (errfd != 2)
+ {
+ if (errfd < 0)
+ errfd = open("/dev/null", O_WRONLY);
+
+ if (errfd != 2)
+ {
+ dup2(errfd, 2);
+ close(errfd);
+ }
+ }
+
+ /*
+ * Put this process in its own process group so that we can kill any child
+ * processes it creates.
+ */
+
+# ifdef HAVE_SETPGID
+ if (!RunUser && setpgid(0, 0))
+ exit(errno + 100);
+# else
+ if (!RunUser && setpgrp())
+ exit(errno + 100);
+# endif /* HAVE_SETPGID */
+
+ /*
+ * Update the remaining file descriptors as needed...
*/
if (infd != 0)
}
}
- if (errfd != 2)
- {
- if (errfd < 0)
- errfd = open("/dev/null", O_WRONLY);
-
- if (errfd != 2)
- {
- dup2(errfd, 2);
- close(errfd);
- }
- }
-
if (backfd != 3 && backfd >= 0)
{
dup2(backfd, 3);
if (!root)
nice(FilterNice);
-#ifdef HAVE_SANDBOX_H
/*
- * Run in a separate security profile...
+ * Reset group membership to just the main one we belong to.
*/
- if (profile)
- {
- char *error = NULL; /* Sandbox error, if any */
+ if (!RunUser && setgid(Group))
+ exit(errno + 100);
- if (sandbox_init((char *)profile, SANDBOX_NAMED_EXTERNAL, &error))
- {
- fprintf(stderr, "ERROR: sandbox_init failed: %s (%s)\n", error,
- strerror(errno));
- sandbox_free_error(error);
- }
- }
-#endif /* HAVE_SANDBOX_H */
+ if (!RunUser && setgroups(1, &Group))
+ exit(errno + 100);
/*
* Change user to something "safe"...
*/
- if (!root && !RunUser)
- {
- /*
- * Running as root, so change to non-priviledged user...
- */
-
- if (setgid(Group))
- exit(errno);
-
- if (setgroups(1, &Group))
- exit(errno);
-
- if (setuid(User))
- exit(errno);
- }
- else
- {
- /*
- * Reset group membership to just the main one we belong to.
- */
-
- if (setgid(Group) && !RunUser)
- exit(errno);
-
- if (setgroups(1, &Group) && !RunUser)
- exit(errno);
- }
+ if (!RunUser && user && setuid(user))
+ exit(errno + 100);
/*
* Change umask to restrict permissions on created files...
* Unblock signals before doing the exec...
*/
-#ifdef HAVE_SIGSET
+# ifdef HAVE_SIGSET
sigset(SIGTERM, SIG_DFL);
sigset(SIGCHLD, SIG_DFL);
sigset(SIGPIPE, SIG_DFL);
-#elif defined(HAVE_SIGACTION)
+# elif defined(HAVE_SIGACTION)
memset(&action, 0, sizeof(action));
sigemptyset(&action.sa_mask);
sigaction(SIGTERM, &action, NULL);
sigaction(SIGCHLD, &action, NULL);
sigaction(SIGPIPE, &action, NULL);
-#else
+# else
signal(SIGTERM, SIG_DFL);
signal(SIGCHLD, SIG_DFL);
signal(SIGPIPE, SIG_DFL);
-#endif /* HAVE_SIGSET */
+# endif /* HAVE_SIGSET */
cupsdReleaseSignals();
/*
- * Execute the command; if for some reason this doesn't work,
- * return the error code...
+ * Execute the command; if for some reason this doesn't work, log an error
+ * exit with a non-zero value...
*/
if (envp)
- execve(command, argv, envp);
+ execve(exec_path, argv, envp);
else
- execv(command, argv);
+ execv(exec_path, argv);
- perror(command);
-
- exit(errno);
+ exit(errno + 100);
}
else if (*pid < 0)
{
*pid = 0;
}
- else
+
+ cupsdReleaseSignals();
+#endif /* HAVE_POSIX_SPAWN */
+
+ if (*pid)
{
if (!process_array)
process_array = cupsArrayNew((cups_array_func_t)compare_procs, NULL);
-
+
if (process_array)
{
if ((proc = calloc(1, sizeof(cupsd_proc_t) + strlen(command))) != NULL)
{
proc->pid = *pid;
proc->job_id = job ? job->id : 0;
- strcpy(proc->name, command);
+ _cups_strcpy(proc->name, command);
cupsArrayAdd(process_array, proc);
}
}
}
- cupsdReleaseSignals();
-
cupsdLogMessage(CUPSD_LOG_DEBUG2,
"cupsdStartProcess(command=\"%s\", argv=%p, envp=%p, "
"infd=%d, outfd=%d, errfd=%d, backfd=%d, sidefd=%d, root=%d, "
{
ch = *src++;
+ if (ch == '/' && !*src)
+ break; /* Don't add trailing slash */
+
if (strchr(".?*()[]^$\\", ch))
*dstptr++ = '\\';
- *dstptr++ = ch;
+ *dstptr++ = (char)ch;
}
*dstptr = '\0';
/*
- * End of "$Id: process.c 7256 2008-01-25 00:48:54Z mike $".
+ * End of "$Id$".
*/