/* * "$Id: tempfile.c,v 1.6 2005/01/04 22:10:39 jlovell Exp $" * * Temp file utilities for the Common UNIX Printing System (CUPS). * * Copyright 1997-2005 by Easy Software Products. * * 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 * * This file is subject to the Apple OS-Developed Software exception. * * Contents: * * cupsTempFd() - Create a temporary file. * cupsTempFile() - Generate a temporary filename. */ /* * Include necessary headers... */ #include "cups.h" #include "string.h" #include "globals.h" #include "debug.h" #include <stdlib.h> #include <ctype.h> #include <errno.h> #include <fcntl.h> #include <sys/stat.h> #if defined(WIN32) || defined(__EMX__) # include <io.h> #else # include <unistd.h> #endif /* WIN32 || __EMX__ */ /* * 'cupsTempFd()' - Create a temporary file. */ int /* O - New file descriptor */ cupsTempFd(char *filename, /* I - Pointer to buffer */ int len) /* I - Size of buffer */ { int fd; /* File descriptor for temp file */ int tries; /* Number of tries */ const char *tmpdir; /* TMPDIR environment var */ cups_globals_t *cg = _cups_globals(); /* Pointer to library globals */ #ifdef WIN32 char tmppath[1024]; /* Windows temporary directory */ DWORD curtime; /* Current time */ #else struct timeval curtime; /* Current time */ #endif /* WIN32 */ /* * See if a filename was specified... */ if (filename == NULL) { if (cg->temp_fd_buf == NULL) cg->temp_fd_buf = calloc(1024, sizeof(char)); if (cg->temp_fd_buf == NULL) return (-1); filename = cg->temp_fd_buf; len = 1024; } /* * See if TMPDIR is defined... */ #ifdef WIN32 if ((tmpdir = getenv("TEMP")) == NULL) { GetTempPath(sizeof(tmppath), tmppath); tmpdir = tmppath; } #else if ((tmpdir = getenv("TMPDIR")) == NULL) { /* * Put root temp files in restricted temp directory... */ if (getuid() == 0) tmpdir = CUPS_REQUESTS "/tmp"; else tmpdir = "/var/tmp"; } #endif /* WIN32 */ /* * Make the temporary name using the specified directory... */ tries = 0; do { #ifdef WIN32 /* * Get the current time of day... */ curtime = GetTickCount() + tries; /* * Format a string using the hex time values... */ snprintf(filename, len - 1, "%s/%05lx%08lx", tmpdir, GetCurrentProcessId(), curtime); #else /* * Get the current time of day... */ gettimeofday(&curtime, NULL); /* * Format a string using the hex time values... */ snprintf(filename, len - 1, "%s/%08lx%05lx", tmpdir, (unsigned long)curtime.tv_sec, (unsigned long)curtime.tv_usec); #endif /* WIN32 */ /* * Open the file in "exclusive" mode, making sure that we don't * stomp on an existing file or someone's symlink crack... */ #ifdef WIN32 fd = open(filename, _O_CREAT | _O_RDWR | _O_TRUNC | _O_BINARY, _S_IREAD | _S_IWRITE); #elif defined(O_NOFOLLOW) fd = open(filename, O_RDWR | O_CREAT | O_EXCL | O_NOFOLLOW, 0600); #else fd = open(filename, O_RDWR | O_CREAT | O_EXCL, 0600); #endif /* WIN32 */ if (fd < 0 && errno != EEXIST) break; tries ++; } while (fd < 0 && tries < 1000); /* * Return the file descriptor... */ return (fd); } /* * 'cupsTempFile()' - Generate a temporary filename. */ char * /* O - Filename */ cupsTempFile(char *filename, /* I - Pointer to buffer */ int len) /* I - Size of buffer */ { int fd; /* File descriptor for temp file */ /* * See if a filename was specified... */ if (filename == NULL) { filename = _cups_globals()->temp_file_buf; len = sizeof(_cups_globals()->temp_file_buf); } /* * Create the temporary file... */ if ((fd = cupsTempFd(filename, len)) < 0) return (NULL); /* * Close the temp file - it'll be reopened later as needed... */ close(fd); /* * Return the temp filename... */ return (filename); } /* * End of "$Id: tempfile.c,v 1.6 2005/01/04 22:10:39 jlovell Exp $". */