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Diffstat (limited to 'gs/contrib/pcl3/eprn/pagecount.c')
-rw-r--r--gs/contrib/pcl3/eprn/pagecount.c293
1 files changed, 0 insertions, 293 deletions
diff --git a/gs/contrib/pcl3/eprn/pagecount.c b/gs/contrib/pcl3/eprn/pagecount.c
deleted file mode 100644
index 18e52ac8f..000000000
--- a/gs/contrib/pcl3/eprn/pagecount.c
+++ /dev/null
@@ -1,293 +0,0 @@
-/******************************************************************************
- File: $Id: pagecount.c,v 1.6 2000/10/07 17:48:49 Martin Rel $
- Contents: Simple (page) count file facility on UNIX
- Author: Martin Lottermoser, Greifswaldstrasse 28, 38124 Braunschweig,
- Germany. E-mail: Martin.Lottermoser@t-online.de.
-
-*******************************************************************************
-* *
-* Copyright (C) 1997, 1998, 2000 by Martin Lottermoser *
-* All rights reserved *
-* *
-******************************************************************************/
-
-/* Configuration management identification */
-#ifndef lint
-static const char
- cm_id[] = "@(#)$Id: pagecount.c,v 1.6 2000/10/07 17:48:49 Martin Rel $";
-#endif
-
-/*****************************************************************************/
-
-#ifndef _XOPEN_SOURCE
-#define _XOPEN_SOURCE 500
-#endif
-
-/* Standard headers */
-#include <errno.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <sys/types.h>
-#include <unistd.h>
-#include <fcntl.h>
-
-/* Specific headers */
-#include "pagecount.h"
-
-/*****************************************************************************/
-
-#define ERRPREFIX "?-E Pagecount module: "
-#define WARNPREFIX "?-W Pagecount module: "
-
-/******************************************************************************
-
- Function: lock_file
-
- This function locks the specified file 'f' with a lock of type 'lock_type'.
- 'filename' is merely used for error messages.
-
- The function returns zero on success and issues error messages on stderr
- if it fails.
-
-******************************************************************************/
-
-static int lock_file(const char *filename, FILE *f, int lock_type)
-{
- int
- fd,
- rc,
- tries;
- struct flock cmd;
-
- /* Obtain file descriptor */
- fd = fileno(f);
- if (fd == -1) {
- fprintf(stderr, ERRPREFIX "Cannot obtain file descriptor (%s).\n",
- strerror(errno));
- fclose(f);
- return -1;
- }
-
- /* Lock the file */
- cmd.l_type = lock_type;
- cmd.l_whence = SEEK_SET; /* 'start' is interpreted from start of file */
- cmd.l_start = 0;
- cmd.l_len = 0; /* until EOF */
- tries = 1;
- while ((rc = fcntl(fd, F_SETLK, &cmd)) != 0 && tries < 3) {
- tries++;
- sleep(1);
- }
- if (rc != 0) {
- fprintf(stderr, ERRPREFIX
- "Cannot obtain lock on page count file `%s' after %d attempts.\n",
- filename, tries);
- return -1;
- }
-
- return 0;
-}
-
-/******************************************************************************
-
- Function: read_count
-
- This function reads the contents of the open page count file.
-
-******************************************************************************/
-
-static int read_count(const char *filename, FILE *f, unsigned long *count)
-{
- if (fscanf(f, "%lu\n", count) != 1) {
- if (feof(f) && !ferror(f)) *count = 0; /* Empty file */
- else {
- fprintf(stderr, ERRPREFIX "Strange contents in page count file `%s'.\n",
- filename);
- return -1;
- }
- }
-
- return 0;
-}
-
-/******************************************************************************
-
- Function: pcf_getcount
-
- This routine reads the page count file 'filename' and returns the count read
- in '*count'. If the file does not exist, the value 0 is assumed.
-
- The function returns zero on success. On error, a message will have been
- issued on stderr.
-
-******************************************************************************/
-
-int pcf_getcount(const char *filename, unsigned long *count)
-{
- FILE *f;
-
- /* Should we use a page count file? */
- if (filename == NULL || *filename == '\0') return 0;
-
- /* If the file does not exist, the page count is taken to be zero. */
- if (access(filename, F_OK) != 0) {
- *count = 0;
- return 0;
- }
-
- /* Open the file */
- if ((f = fopen(filename, "r")) == NULL) {
- fprintf(stderr, ERRPREFIX "Cannot open page count file `%s': %s.\n",
- filename, strerror(errno));
- return -1;
- }
-
- /* Lock the file for reading (shared lock) */
- if (lock_file(filename, f, F_RDLCK) != 0) {
- fclose(f);
- return 1;
- }
-
- /* Read the contents */
- if (read_count(filename, f, count) != 0) {
- fclose(f);
- return -1;
- }
-
- /* Close the file, releasing the lock */
- fclose(f);
-
- return 0;
-}
-
-/******************************************************************************
-
- Function: pcf_inccount
-
- This function opens the page count file 'filename' and increases the number
- stored there by 'by'. If the file does not exist it will be created and
- treated as if had contained 0.
-
- The function returns zero on success and issues error messages on stderr if
- it fails.
-
-******************************************************************************/
-
-int pcf_inccount(const char *filename, unsigned long by)
-{
- FILE *f;
- int rc;
- unsigned long count;
-
- /* Should we use a page count file? */
- if (filename == NULL || *filename == '\0') return 0;
-
- /* Open the file. We need to access the old contents: this excludes the "w",
- "a" and "w+" modes. The operation should create the file if it doesn't
- exist: this excludes the "r" and "r+" modes. Hence the only choice is "a+".
- Note that this procedure makes it unavoidable to accept an empty file as
- being valid. This is, however, anyway necessary because of the fopen() and
- fcntl() calls being not in one transaction.
- */
- if ((f = fopen(filename, "a+")) == NULL) {
- fprintf(stderr, ERRPREFIX "Cannot open page count file `%s': %s.\n",
- filename, strerror(errno));
- return 1;
- }
-
- /* Lock the file for writing (exclusively) */
- if (lock_file(filename, f, F_WRLCK) != 0) {
- fclose(f);
- return 1;
- }
-
- /* Reposition on the beginning. fopen() with "a" as above opens the file at
- EOF. */
- if (fseek(f, 0L, SEEK_SET) != 0) {
- fprintf(stderr, ERRPREFIX "fseek() failed on `%s': %s.\n",
- filename, strerror(errno));
- fclose(f);
- return 1;
- }
-
- /* Read the contents */
- if (read_count(filename, f, &count) != 0) {
- fclose(f);
- return -1;
- }
-
- /* Rewrite the file */
- rc = 0;
- {
- FILE *f1 = fopen(filename, "w");
-
- if (f1 == NULL) {
- fprintf(stderr, ERRPREFIX
- "Error opening page count file `%s' a second time: %s.\n",
- filename, strerror(errno));
- rc = 1;
- }
- else {
- if (fprintf(f1, "%lu\n", count + by) < 0) {
- fprintf(stderr, ERRPREFIX "Error writing to `%s': %s.\n",
- filename, strerror(errno));
- rc = -1;
- }
- if (fclose(f1) != 0) {
- fprintf(stderr,
- ERRPREFIX "Error closing `%s' after writing: %s.\n",
- filename, strerror(errno));
- rc = -1;
- }
- }
- }
-
- /* Close the file (this releases the lock) */
- if (fclose(f) != 0)
- fprintf(stderr, WARNPREFIX "Error closing `%s': %s.\n",
- filename, strerror(errno));
-
- return rc;
-}
-
-#ifdef TEST
-/******************************************************************************
-
- Function: main
-
- This routine can be used for testing.
-
-******************************************************************************/
-
-int main(int argc, char **argv)
-{
- const char *filename = "pages.count";
- int rc;
- unsigned long
- by = 1,
- count = 0;
-
- if (argc > 1) {
- if (sscanf(argv[1], "%lu", &by) != 1) {
- fprintf(stderr, ERRPREFIX "Illegal number: `%s'.\n", argv[1]);
- exit(EXIT_FAILURE);
- }
- if (argc > 2) filename = argv[2];
- if (argc > 3) {
- fprintf(stderr, ERRPREFIX "Too many arguments.\n");
- exit(EXIT_FAILURE);
- }
- }
-
- rc = pcf_getcount(filename, &count);
- if (rc == 0)
- printf("Initial count returned by pcf_getcount(): %lu.\n", count);
- else fprintf(stderr, "? Error from pcf_getcount(), return code is %d.\n", rc);
-
- rc = pcf_inccount(filename, by);
-
- exit(rc == 0? EXIT_SUCCESS: EXIT_FAILURE);
-}
-
-#endif /* TEST */
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