/*
* "$Id: process.c 7256 2008-01-25 00:48:54Z mike $"
*
- * Process management routines for the Common UNIX Printing System (CUPS).
+ * Process management routines for the CUPS scheduler.
*
- * Copyright 2007 by Apple Inc.
+ * Copyright 2007-2011 by Apple Inc.
* Copyright 1997-2007 by Easy Software Products, all rights reserved.
*
* These coded instructions, statements, and computer programs are the
#include <grp.h>
#ifdef __APPLE__
# include <libgen.h>
-#endif /* __APPLE__ */
-#ifdef HAVE_SANDBOX_H
-# define __APPLE_API_PRIVATE
-# include <sandbox.h>
-#endif /* HAVE_SANDBOX_H */
+#endif /* __APPLE__ */
/*
typedef struct
{
- int pid; /* Process ID */
+ int pid, /* Process ID */
+ job_id; /* Job associated with process */
char name[1]; /* Name of process */
} cupsd_proc_t;
temp[1024]; /* Quoted TempDir */
+ if (!UseProfiles)
+ {
+ /*
+ * Only use sandbox profiles as root...
+ */
+
+ cupsdLogMessage(CUPSD_LOG_DEBUG2, "cupsdCreateProfile(job_id=%d) = NULL",
+ job_id);
+
+ return (NULL);
+ }
+
if ((fp = cupsTempFile2(profile, sizeof(profile))) == NULL)
{
+ cupsdLogMessage(CUPSD_LOG_DEBUG2, "cupsdCreateProfile(job_id=%d) = NULL",
+ job_id);
cupsdLogMessage(CUPSD_LOG_ERROR, "Unable to create security profile: %s",
strerror(errno));
return (NULL);
}
+ fchown(cupsFileNumber(fp), RunUser, Group);
+ fchmod(cupsFileNumber(fp), 0640);
+
cupsd_requote(cache, CacheDir, sizeof(cache));
cupsd_requote(request, RequestRoot, sizeof(request));
cupsd_requote(root, ServerRoot, sizeof(root));
cupsd_requote(temp, TempDir, sizeof(temp));
cupsFilePuts(fp, "(version 1)\n");
- cupsFilePuts(fp, "(debug deny)\n");
+ if (LogLevel >= CUPSD_LOG_DEBUG)
+ cupsFilePuts(fp, "(debug deny)\n");
cupsFilePuts(fp, "(allow default)\n");
cupsFilePrintf(fp,
"(deny file-write* file-read-data file-read-metadata\n"
- " (regex #\"^%s/\"))\n", request);
+ " (regex"
+ " #\"^%s$\"" /* RequestRoot */
+ " #\"^%s/\"" /* RequestRoot/... */
+ "))\n",
+ request, request);
+ if (!RunUser)
+ cupsFilePuts(fp,
+ "(deny file-write* file-read-data file-read-metadata\n"
+ " (regex"
+ " #\"^/Users$\""
+ " #\"^/Users/\""
+ "))\n");
cupsFilePrintf(fp,
"(deny file-write*\n"
- " (regex #\"^%s\" #\"^/private/etc\" #\"^/usr/local/etc\" "
- "#\"^/Library\" #\"^/System\" #\"^/Users\"))\n", root);
+ " (regex"
+ " #\"^%s$\"" /* ServerRoot */
+ " #\"^%s/\"" /* ServerRoot/... */
+ " #\"^/private/etc$\""
+ " #\"^/private/etc/\""
+ " #\"^/usr/local/etc$\""
+ " #\"^/usr/local/etc/\""
+ " #\"^/Library$\""
+ " #\"^/Library/\""
+ " #\"^/System$\""
+ " #\"^/System/\""
+ "))\n",
+ root, root);
+ /* Specifically allow applications to stat RequestRoot */
+ cupsFilePrintf(fp,
+ "(allow file-read-metadata\n"
+ " (regex"
+ " #\"^%s$\"" /* RequestRoot */
+ "))\n",
+ request);
cupsFilePrintf(fp,
"(allow file-write* file-read-data file-read-metadata\n"
- " (regex #\"^%s$\" #\"^%s/\" #\"^%s$\" #\"^%s/\" "
- "#\"^/Library/Caches/\"))\n",
- temp, temp, cache, cache);
+ " (regex"
+ " #\"^%s$\"" /* TempDir */
+ " #\"^%s/\"" /* TempDir/... */
+ " #\"^%s$\"" /* CacheDir */
+ " #\"^%s/\"" /* CacheDir/... */
+ " #\"^%s/Library$\"" /* RequestRoot/Library */
+ " #\"^%s/Library/\"" /* RequestRoot/Library/... */
+ " #\"^/Library/Application Support/\""
+ " #\"^/Library/Caches/\""
+ " #\"^/Library/Preferences/\""
+ " #\"^/Library/Printers/.*/\""
+ " #\"^/Users/Shared/\""
+ "))\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");
if (job_id)
+ {
+ /*
+ * Allow job filters to read the spool file(s)...
+ */
+
cupsFilePrintf(fp,
"(allow file-read-data file-read-metadata\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"
+ ")\n");
+ }
cupsFileClose(fp);
cupsdLogMessage(CUPSD_LOG_DEBUG2, "cupsdCreateProfile(job_id=%d) = \"%s\"",
job_id, profile);
return ((void *)strdup(profile));
+
#else
+ cupsdLogMessage(CUPSD_LOG_DEBUG2, "cupsdCreateProfile(job_id=%d) = NULL",
+ job_id);
return (NULL);
#endif /* HAVE_SANDBOX_H */
void
cupsdDestroyProfile(void *profile) /* I - Profile */
{
+ cupsdLogMessage(CUPSD_LOG_DEBUG2, "cupsdDeleteProfile(profile=\"%s\")",
+ profile ? (char *)profile : "(null)");
+
#ifdef HAVE_SANDBOX_H
if (profile)
{
- cupsdLogMessage(CUPSD_LOG_DEBUG2, "cupsdDeleteProfile(profile=\"%s\")",
- (char *)profile);
unlink((char *)profile);
free(profile);
}
cupsdEndProcess(int pid, /* I - Process ID */
int force) /* I - Force child to die */
{
- if (force)
+ cupsdLogMessage(CUPSD_LOG_DEBUG2, "cupsdEndProcess(pid=%d, force=%d)", pid,
+ force);
+
+ if (!pid)
+ return (0);
+ else 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 namelen, /* I - Size of name buffer */
+ int *job_id) /* O - Job ID pointer or NULL */
{
cupsd_proc_t key, /* Search key */
*proc; /* Matching process */
if ((proc = (cupsd_proc_t *)cupsArrayFind(process_array, &key)) != NULL)
{
+ if (job_id)
+ *job_id = proc->job_id;
+
strlcpy(name, proc->name, namelen);
cupsArrayRemove(process_array, proc);
free(proc);
-
- return (name);
}
else
- return ("unknown");
+ {
+ if (job_id)
+ *job_id = 0;
+
+ 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);
+
+ return (name);
}
int /* O - Process ID or 0 */
cupsdStartProcess(
- const char *command, /* I - Full path to command */
- char *argv[], /* I - Command-line arguments */
- char *envp[], /* I - Environment */
- int infd, /* I - Standard input file descriptor */
- int outfd, /* I - Standard output file descriptor */
- int errfd, /* I - Standard error file descriptor */
- int backfd, /* I - Backchannel file descriptor */
- int sidefd, /* I - Sidechannel file descriptor */
- int root, /* I - Run as root? */
- void *profile, /* I - Security profile to use */
- int *pid) /* O - Process ID */
+ const char *command, /* I - Full path to command */
+ char *argv[], /* I - Command-line arguments */
+ char *envp[], /* I - Environment */
+ int infd, /* I - Standard input file descriptor */
+ int outfd, /* I - Standard output file descriptor */
+ int errfd, /* I - Standard error file descriptor */
+ int backfd, /* I - Backchannel file descriptor */
+ int sidefd, /* I - Sidechannel file descriptor */
+ int root, /* I - Run as root? */
+ void *profile, /* I - Security profile to use */
+ cupsd_job_t *job, /* I - Job associated with process */
+ int *pid) /* O - Process ID */
{
+ int i; /* Looping var */
+ const char *exec_path = command; /* Command to be exec'd */
+ char *real_argv[103], /* Real command-line arguments */
+ cups_exec[1024]; /* Path to "cups-exec" program */
+ int user; /* Command UID */
cupsd_proc_t *proc; /* New process record */
#if defined(HAVE_SIGACTION) && !defined(HAVE_SIGSET)
struct sigaction action; /* POSIX signal handler */
#endif /* __APPLE__ */
- cupsdLogMessage(CUPSD_LOG_DEBUG2,
- "cupsdStartProcess(\"%s\", %p, %p, %d, %d, %d)",
- command, argv, envp, infd, outfd, errfd);
+ *pid = 0;
- if (access(command, X_OK))
- {
- cupsdLogMessage(CUPSD_LOG_ERROR, "Unable to execute %s: %s", command,
- strerror(errno));
- *pid = 0;
+ /*
+ * Figure out the UID for the child process...
+ */
+
+ if (RunUser)
+ user = RunUser;
+ else if (root)
+ user = 0;
+ else
+ user = User;
+
+ /*
+ * Check the permissions of the command we are running...
+ */
+
+ 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 MacOS X - this allows MacOS X
+ * Add special voodoo magic for Mac OS X - this allows Mac OS X
* programs to access their bundle resources properly...
*/
}
#endif /* __APPLE__ */
+ /*
+ * Use helper program when we have a sandbox profile...
+ */
+
+ if (profile)
+ {
+ snprintf(cups_exec, sizeof(cups_exec), "%s/daemon/cups-exec", ServerBin);
+
+ real_argv[0] = cups_exec;
+ real_argv[1] = profile;
+ real_argv[2] = (char *)command;
+
+ for (i = 0;
+ i < (int)(sizeof(real_argv) / sizeof(real_argv[0]) - 4) && argv[i];
+ i ++)
+ real_argv[i + 3] = argv[i];
+
+ real_argv[i + 3] = NULL;
+
+ argv = real_argv;
+ exec_path = cups_exec;
+ }
+
/*
* Block signals before forking...
*/
if (infd != 0)
{
- close(0);
- if (infd > 0)
- dup(infd);
- else
- open("/dev/null", O_RDONLY);
+ if (infd < 0)
+ infd = open("/dev/null", O_RDONLY);
+
+ if (infd != 0)
+ {
+ dup2(infd, 0);
+ close(infd);
+ }
}
+
if (outfd != 1)
{
- close(1);
- if (outfd > 0)
- dup(outfd);
- else
- open("/dev/null", O_WRONLY);
+ if (outfd < 0)
+ outfd = open("/dev/null", O_WRONLY);
+
+ if (outfd != 1)
+ {
+ dup2(outfd, 1);
+ close(outfd);
+ }
}
+
if (errfd != 2)
{
- close(2);
- if (errfd > 0)
- dup(errfd);
- else
- open("/dev/null", O_WRONLY);
+ if (errfd < 0)
+ errfd = open("/dev/null", O_WRONLY);
+
+ if (errfd != 2)
+ {
+ dup2(errfd, 2);
+ close(errfd);
+ }
}
- if (backfd != 3)
+
+ if (backfd != 3 && backfd >= 0)
{
- close(3);
- if (backfd > 0)
- dup(backfd);
- else
- open("/dev/null", O_RDWR);
+ dup2(backfd, 3);
+ close(backfd);
fcntl(3, F_SETFL, O_NDELAY);
}
- if (sidefd != 4 && sidefd > 0)
+
+ if (sidefd != 4 && sidefd >= 0)
{
- close(4);
- dup(sidefd);
+ dup2(sidefd, 4);
+ close(sidefd);
fcntl(4, F_SETFL, O_NDELAY);
}
if (!root)
nice(FilterNice);
-#ifdef HAVE_SANDBOX_H
- /*
- * Run in a separate security profile...
- */
-
- if (profile)
- {
- char *error = NULL; /* Sandbox error, if any */
-
- 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 */
-
/*
* Change user to something "safe"...
*/
* Reset group membership to just the main one we belong to.
*/
- setgid(Group);
- setgroups(1, &Group);
+ if (setgid(Group) && !RunUser)
+ exit(errno);
+
+ if (setgroups(1, &Group) && !RunUser)
+ exit(errno);
}
/*
#ifdef HAVE_SIGSET
sigset(SIGTERM, SIG_DFL);
sigset(SIGCHLD, SIG_DFL);
+ sigset(SIGPIPE, SIG_DFL);
#elif defined(HAVE_SIGACTION)
memset(&action, 0, sizeof(action));
sigaction(SIGTERM, &action, NULL);
sigaction(SIGCHLD, &action, NULL);
+ sigaction(SIGPIPE, &action, NULL);
#else
signal(SIGTERM, SIG_DFL);
signal(SIGCHLD, SIG_DFL);
+ signal(SIGPIPE, SIG_DFL);
#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(1);
}
else if (*pid < 0)
{
{
if ((proc = calloc(1, sizeof(cupsd_proc_t) + strlen(command))) != NULL)
{
- proc->pid = *pid;
- strcpy(proc->name, command);
+ proc->pid = *pid;
+ proc->job_id = job ? job->id : 0;
+ _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, "
+ "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);
+
return (*pid);
}
projects / thirdparty / cups.git / blobdiff