#include <cstdlib>
#include <sys/types.h>
#include <sys/wait.h>
-#include <unistd.h>
+#ifdef HAVE_UNISTD_H
+# include <unistd.h>
+#endif
#include <vector>
waitpid(pid(), &waitstatus, WNOHANG);
// Racy of course, but it will do.
- if (::kill(pid(), 0) && errno == ESRCH)
+ if (lyx::support::kill(pid(), 0) && errno == ESRCH)
return false;
return true;
}
return 1;
// Split the input command up into an array of words stored
- // in a contiguous block of memory.
- char const * const c_str = line.c_str();
+ // in a contiguous block of memory. The array contains pointers
+ // to each word.
// Don't forget the terminating `\0' character.
+ char const * const c_str = line.c_str();
vector<char> vec(c_str, c_str + line.size() + 1);
- // Turn the string into an array of words, each terminated with '\0'.
- std::replace(vec.begin(), vec.end(), ' ', '\0');
+
+ // Splitting the command up into an array of words means replacing
+ // the whitespace between words with '\0'. Life is complicated
+ // however, because words protected by quotes can contain whitespace.
+ //
+ // The strategy we adopt is:
+ // 1. If we're not inside quotes, then replace white space with '\0'.
+ // 2. If we are inside quotes, then don't replace the white space
+ // but do remove the quotes themselves. We do this naively by
+ // replacing the quote with '\0' which is fine if quotes
+ // delimit the entire word.
+ char inside_quote = 0;
+ vector<char>::iterator it = vec.begin();
+ vector<char>::iterator const end = vec.end();
+ for (; it != end; ++it) {
+ char const c = *it;
+ if (!inside_quote) {
+ if (c == ' ')
+ *it = '\0';
+ else if (c == '\'' || c == '"') {
+ *it = '\0';
+ inside_quote = c;
+ }
+ } else if (c == inside_quote) {
+ *it = '\0';
+ inside_quote = 0;
+ }
+ }
// Build an array of pointers to each word.
- vector<char>::iterator vit = vec.begin();
- vector<char>::iterator vend = vec.end();
+ it = vec.begin();
vector<char *> argv;
char prev = '\0';
- for (; vit != vend; ++vit) {
- if (*vit != '\0' && prev == '\0')
- argv.push_back(&*vit);
- prev = *vit;
+ for (; it != end; ++it) {
+ if (*it != '\0' && prev == '\0')
+ argv.push_back(&*it);
+ prev = *it;
}
- // Strip quotes. Does so naively, assuming that the word begins
- // and ends in quotes.
+ argv.push_back(0);
+
+ // Debug output.
vector<char *>::iterator ait = argv.begin();
vector<char *>::iterator const aend = argv.end();
- for (; ait != aend; ++ait) {
- char * word = *ait;
- std::size_t const len = strlen(word);
- if (len >= 2) {
- char & first = word[0];
- char & last = word[len-1];
-
- if (first == last &&
- (first == '\'' || first == '"')) {
- first = '\0';
- last = '\0';
- *ait += 1;
- }
- }
- }
-
- ait = argv.begin();
+ lyxerr << "<command>\n";
for (; ait != aend; ++ait)
- std::cout << *ait << std::endl;
- argv.push_back(0);
+ if (*ait)
+ lyxerr << '\t'<< *ait << '\n';
+ lyxerr << "</command>" << std::endl;
#ifndef __EMX__
pid_t const cpid = ::fork();