/*
- * "$Id: process.c 4719 2005-09-28 21:12:44Z mike $"
+ * "$Id: process.c 6987 2007-09-25 15:43:44Z mike $"
*
* Process management routines for the Common UNIX Printing System (CUPS).
*
- * Copyright 1997-2005 by Easy Software Products, all rights reserved.
+ * Copyright 2007 by Apple Inc.
+ * Copyright 1997-2007 by Easy Software Products, all rights reserved.
*
* These coded instructions, statements, and computer programs are the
- * property of Easy Software Products 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 missing or damaged please contact Easy Software Products
- * at:
- *
- * Attn: CUPS Licensing Information
- * Easy Software Products
- * 44141 Airport View Drive, Suite 204
- * Hollywood, Maryland 20636 USA
- *
- * Voice: (301) 373-9600
- * EMail: cups-info@cups.org
- * WWW: http://www.cups.org
+ * 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:
*
- * cupsdEndProcess() - End a process.
- * cupsdStartProcess() - Start a process.
+ * cupsdEndProcess() - End a process.
+ * cupsdFinishProcess() - Finish a process and get its name.
+ * cupsdStartProcess() - Start a process.
+ * compare_procs() - Compare two processes.
*/
/*
#include "cupsd.h"
#include <grp.h>
+#if defined(__APPLE__)
+# include <libgen.h>
+#endif /* __APPLE__ */
+
+
+/*
+ * Process structure...
+ */
+
+typedef struct
+{
+ int pid; /* Process ID */
+ char name[1]; /* Name of process */
+} cupsd_proc_t;
+
+
+/*
+ * Local globals...
+ */
+
+static cups_array_t *process_array = NULL;
+
+
+/*
+ * Local functions...
+ */
+
+static int compare_procs(cupsd_proc_t *a, cupsd_proc_t *b);
/*
}
+/*
+ * 'cupsdFinishProcess()' - Finish a process and get its name.
+ */
+
+const char * /* O - Process name */
+cupsdFinishProcess(int pid, /* I - Process ID */
+ char *name, /* I - Name buffer */
+ int namelen) /* I - Size of name buffer */
+{
+ cupsd_proc_t key, /* Search key */
+ *proc; /* Matching process */
+
+
+ key.pid = pid;
+
+ if ((proc = (cupsd_proc_t *)cupsArrayFind(process_array, &key)) != NULL)
+ {
+ strlcpy(name, proc->name, namelen);
+ cupsArrayRemove(process_array, proc);
+ free(proc);
+
+ return (name);
+ }
+ else
+ return ("unknown");
+}
+
+
/*
* 'cupsdStartProcess()' - Start a process.
*/
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? */
int *pid) /* O - Process ID */
{
+ cupsd_proc_t *proc; /* New process record */
#if defined(HAVE_SIGACTION) && !defined(HAVE_SIGSET)
- struct sigaction action; /* POSIX signal handler */
+ struct sigaction action; /* POSIX signal handler */
#endif /* HAVE_SIGACTION && !HAVE_SIGSET */
+#if defined(__APPLE__)
+ char processPath[1024], /* CFProcessPath environment variable */
+ linkpath[1024]; /* Link path for symlinks... */
+ int linkbytes; /* Bytes for link path */
+#endif /* __APPLE__ */
cupsdLogMessage(CUPSD_LOG_DEBUG2,
"cupsdStartProcess(\"%s\", %p, %p, %d, %d, %d)",
command, argv, envp, infd, outfd, errfd);
+ if (access(command, X_OK))
+ {
+ cupsdLogMessage(CUPSD_LOG_ERROR, "Unable to execute %s: %s", command,
+ strerror(errno));
+ *pid = 0;
+ return (0);
+ }
+
+#if defined(__APPLE__)
+ if (envp)
+ {
+ /*
+ * Add special voodoo magic for MacOS X - this allows MacOS X
+ * programs to access their bundle resources properly...
+ */
+
+ if ((linkbytes = readlink(command, linkpath, sizeof(linkpath) - 1)) > 0)
+ {
+ /*
+ * Yes, this is a symlink to the actual program, nul-terminate and
+ * use it...
+ */
+
+ linkpath[linkbytes] = '\0';
+
+ if (linkpath[0] == '/')
+ snprintf(processPath, sizeof(processPath), "CFProcessPath=%s",
+ linkpath);
+ else
+ snprintf(processPath, sizeof(processPath), "CFProcessPath=%s/%s",
+ dirname((char *)command), linkpath);
+ }
+ else
+ snprintf(processPath, sizeof(processPath), "CFProcessPath=%s", command);
+
+ envp[0] = processPath; /* Replace <CFProcessPath> string */
+ }
+#endif /* __APPLE__ */
+
/*
* Block signals before forking...
*/
open("/dev/null", O_RDWR);
fcntl(3, F_SETFL, O_NDELAY);
}
+ if (sidefd != 4 && sidefd > 0)
+ {
+ close(4);
+ dup(sidefd);
+ fcntl(4, F_SETFL, O_NDELAY);
+ }
/*
* Change the priority of the process based on the FilterNice setting.
*/
if (setgid(Group))
- exit(errno);
+ exit(errno);
if (setgroups(1, &Group))
- exit(errno);
+ exit(errno);
if (setuid(User))
exit(errno);
* Reset group membership to just the main one we belong to.
*/
+ setgid(Group);
setgroups(1, &Group);
}
*pid = 0;
}
+ else
+ {
+ 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;
+ strcpy(proc->name, command);
+
+ cupsArrayAdd(process_array, proc);
+ }
+ }
+ }
cupsdReleaseSignals();
/*
- * End of "$Id: process.c 4719 2005-09-28 21:12:44Z mike $".
+ * 'compare_procs()' - Compare two processes.
+ */
+
+static int /* O - Result of comparison */
+compare_procs(cupsd_proc_t *a, /* I - First process */
+ cupsd_proc_t *b) /* I - Second process */
+{
+ return (a->pid - b->pid);
+}
+
+
+/*
+ * End of "$Id: process.c 6987 2007-09-25 15:43:44Z mike $".
*/
projects / thirdparty / cups.git / blobdiff