diff options
Diffstat (limited to 'butl')
| -rw-r--r-- | butl/process.cxx | 133 |
1 files changed, 94 insertions, 39 deletions
diff --git a/butl/process.cxx b/butl/process.cxx index 1efa103..850ba9b 100644 --- a/butl/process.cxx +++ b/butl/process.cxx @@ -13,7 +13,7 @@ # include <butl/win32-utility> # include <io.h> // _get_osfhandle(), _close() -# include <stdlib.h> // _MAX_PATH, getenv() +# include <stdlib.h> // _MAX_PATH # include <sys/types.h> // stat # include <sys/stat.h> // stat(), S_IS* @@ -25,7 +25,7 @@ # define STDERR_FILENO 2 # endif // _MSC_VER -# include <cstdlib> // __argv[] +# include <cstdlib> // getenv(), __argv[] # include <butl/small-vector> #endif @@ -574,16 +574,16 @@ namespace butl size_t fn (strlen (f)); - // Unless there is already the .exe extension, then we will need to add - // it. Note that running .bat files requires starting cmd.exe and passing - // the batch file as an argument (see CreateProcess() for deails). So - // if/when we decide to support those, it will have to be handled - // differently. + // Unless there is already the .exe/.bat extension, then we will need to + // add it. // bool ext; { const char* e (traits::find_extension (f, fn)); - ext = (e == nullptr || casecmp (e, ".exe") != 0); + ext = (e == nullptr || + (casecmp (e, ".exe") != 0 && + casecmp (e, ".bat") != 0 && + casecmp (e, ".cmd") != 0)); } process_path r (f, path (), path ()); // Make sure it is not empty. @@ -599,9 +599,26 @@ namespace butl return _stat (f, &si) == 0 && S_ISREG (si.st_mode); }; - auto search = [&ep, f, fn, ext, &exists] (const char* d, - size_t dn, - bool norm = false) -> bool + // Check with extensions: .exe, .cmd, and .bat. + // + auto exists_ext = [&exists] (string& s) -> bool + { + size_t i (s.size () + 1); // First extension letter. + + s += ".exe"; + if (exists (s.c_str ())) + return true; + + s[i] = 'c'; s[i + 1] = 'm'; s[i + 2] = 'd'; + if (exists (s.c_str ())) + return true; + + s[i] = 'b'; s[i + 1] = 'a'; s[i + 2] = 't'; + return exists (s.c_str ()); + }; + + auto search = [&ep, f, fn, ext, &exists, &exists_ext] ( + const char* d, size_t dn, bool norm = false) -> bool { string s (move (ep).string ()); // Reuse buffer. @@ -619,12 +636,15 @@ namespace butl if (norm) ep.normalize (); - // Add the .exe extension if necessary. - // - if (ext) - ep += ".exe"; + if (!ext) + return exists (ep.string ().c_str ()); - return exists (ep.string ().c_str ()); + // Try with the extensions. + // + s = move (ep).string (); + bool e (exists_ext (s)); + ep = path (move (s)); + return e; }; // If there is a directory component in the file, then the PATH search @@ -636,13 +656,17 @@ namespace butl { if (traits::absolute (f, fn)) { - if (ext) + bool e; + if (!ext) + e = exists (r.effect_string ()); + else { - ep = path (f, fn); - ep += ".exe"; + string s (f, fn); + e = exists_ext (s); + ep = path (move (s)); } - if (exists (r.effect_string ())) + if (e) return r; } else @@ -869,6 +893,24 @@ namespace butl const process_path& pp, const char* args[], int in, int out, int err) { + // Figure out if this is a batch file since running them requires starting + // cmd.exe and passing the batch file as an argument (see CreateProcess() + // for deails). + // + const char* batch (nullptr); + { + const char* p (pp.effect_string ()); + const char* e (path::traits::find_extension (p, strlen (p))); + if (e != nullptr && (casecmp (e, ".bat") == 0 || + casecmp (e, ".cmd") == 0)) + { + batch = getenv ("COMSPEC"); + + if (batch == nullptr) + batch = "C:\\Windows\\System32\\cmd.exe"; + } + } + fdpipe out_fd; fdpipe in_ofd; fdpipe in_efd; @@ -934,31 +976,44 @@ namespace butl // Serialize the arguments to string. // string cmd_line; - - for (const char* const* p (args); *p != 0; ++p) { - if (p != args) - cmd_line += ' '; + auto append = [&cmd_line] (const string& a) + { + if (!cmd_line.empty ()) + cmd_line += ' '; - // On Windows we need to protect values with spaces using quotes. Since - // there could be actual quotes in the value, we need to escape them. - // - string a (*p); - bool quote (a.empty () || a.find (' ') != string::npos); + // On Windows we need to protect values with spaces using quotes. + // Since there could be actual quotes in the value, we need to escape + // them. + // + bool quote (a.empty () || a.find (' ') != string::npos); + + if (quote) + cmd_line += '"'; - if (quote) - cmd_line += '"'; + for (size_t i (0); i < a.size (); ++i) + { + if (a[i] == '"') + cmd_line += "\\\""; + else + cmd_line += a[i]; + } - for (size_t i (0); i < a.size (); ++i) + if (quote) + cmd_line += '"'; + }; + + if (batch != nullptr) { - if (a[i] == '"') - cmd_line += "\\\""; - else - cmd_line += a[i]; + append (batch); + append ("/c"); + append (pp.effect_string ()); } - if (quote) - cmd_line += '"'; + for (const char* const* p (args + (batch != nullptr ? 1 : 0)); + *p != 0; + ++p) + append (*p); } // Prepare other process information. @@ -1035,7 +1090,7 @@ namespace butl fail ("invalid file descriptor"); if (!CreateProcess ( - pp.effect_string (), + batch != nullptr ? batch : pp.effect_string (), const_cast<char*> (cmd_line.c_str ()), 0, // Process security attributes. 0, // Primary thread security attributes. |