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/*
* numberpages.cpp -- driver program to number pages in a PDF, this was
* mainly necessary because the shell breaks blanks
* in the section option string
*
* (c) 2022 Prof Dr Andreas Müller, OST Ostschweizer Fachhochschule
*/
#include <cstdio>
#include <cstdlib>
#include <getopt.h>
#include <iostream>
#include <sstream>
#include <string>
#include <sys/stat.h>
void usage(char *progname) {
std::cout << "usage: " << progname << " [ -f ] [ -s section ] ";
std::cout << "<unnumbered.pdf> <numbered.pdf>" << std::endl;
}
struct option longoptions[] = {
{ "debug", no_argument, NULL, 'd' },
{ "section", required_argument, NULL, 's' },
{ "force", no_argument, NULL, 'f' },
{ NULL, no_argument, NULL, 0 }
};
int main(int argc, char *argv[]) {
bool force = false;
bool debug = false;
std::string section;
int c, longindex, rc;
while (EOF != (c = getopt_long(argc, argv, "dfhs:?", longoptions,
&longindex))) {
switch (c) {
case 'd':
debug = true;
break;
case 'f':
force = true;
break;
case 'h':
case '?':
usage(argv[0]);
return EXIT_SUCCESS;
case 's':
section = std::string(optarg);
if (debug) {
std::cout << "section string: " << section;
std::cout << std::endl;
}
break;
}
}
// remaining arguments are file names
if ((argc - optind) < 2) {
std::cerr << "not enough arguments" << std::endl;
usage(argv[0]);
return EXIT_FAILURE;
}
std::string unnumbered = std::string(argv[optind++]);
std::string numbered = std::string(argv[optind++]);
if (debug) {
std::cout << "numbering " << unnumbered;
std::cout << ", sending output to " << unnumbered;
std::cout << std::endl;
}
// make sure input file does exist
struct stat sb;
rc = stat(unnumbered.c_str(), &sb);
if ((0 == rc) && S_ISREG(sb.st_mode)) {
if (debug) {
std::cout << "input file " << unnumbered << " found";
std::cout << std::endl;
}
} else {
std::cerr << "cannot find " << unnumbered << std::endl;
return EXIT_FAILURE;
}
// make sure the "unnumbered.pdf" file does not exist
rc = stat("unnumbered.pdf", &sb);
if (0 == rc) {
std::cerr << "file unnumbered.pdf exists, clean up first";
std::cerr << std::endl;
return EXIT_FAILURE;
}
// test for existence of output file
rc = stat(numbered.c_str(), &sb);
if ((!force) && (0 == rc)) {
std::cerr << "output file exists, use --force option";
std::cerr << std::endl;
return EXIT_FAILURE;
}
// make sure the numbered.tex is present
rc = stat("numbered.tex", &sb);
if ((0 != rc) || (!S_ISREG(sb.st_mode))) {
std::cerr << "file 'numbered.tex' is missing" << std::endl;
return EXIT_FAILURE;
}
// remove the "numbered.pdf" if it exists
if (debug) {
std::cout << "removing numbered.pdf" << std::endl;
}
unlink("numbered.pdf");
// copy the file
{
std::ostringstream out;
out << "cp '" << unnumbered << "' unnumbered.pdf";
out.flush();
std::string copycommand = out.str();
rc = system(copycommand.c_str());
if (0 != rc) {
std::cerr << "could not copy " << unnumbered;
std::cerr << " to unnumbered.pdf: " << rc << std::endl;
return EXIT_FAILURE;
}
if (debug) {
std::cout << "file " << unnumbered << " copied to ";
std::cout << "unnumbered.pdf" << std::endl;
}
}
// prepare command line
std::ostringstream out;
out << "pdflatex ";
if (section.size() > 0) {
out << "\\\\def\\\\sectionnumber{" << section << "} ";
out << "\\\\input{numbered.tex}";
} else {
out << unnumbered;
}
if (debug) {
std::cout << "command line: " << out.str() << std::endl;
}
// run the command
rc = system(out.str().c_str());
if (0 != rc) {
std::cerr << "pdflatex failed: " << rc << std::endl;
return EXIT_FAILURE;
}
// check for the existence of the output file
rc = stat("numbered.pdf", &sb);
if ((0 != rc) || (!S_ISREG(sb.st_mode))) {
std::cerr << "output file 'numbered.pdf' not found";
std::cerr << std::endl;
return EXIT_FAILURE;
}
// rename the output file
rc = rename("numbered.pdf", numbered.c_str());
if (rc != 0) {
std::string error(strerror(errno));
std::cerr << "cannot rename file to '" << numbered << ": ";
std::cerr << error << std::endl;
return EXIT_FAILURE;
}
// perform some cleanup
unlink("unnumbered.pdf");
unlink("numbered.log");
unlink("numbered.aux");
return EXIT_SUCCESS;
}
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