diff options
author | Colin Fletcher <colin.m.fletcher@googlemail.com> | 2013-10-10 19:50:21 +0100 |
---|---|---|
committer | Colin Fletcher <colin.m.fletcher@googlemail.com> | 2013-10-10 19:50:21 +0100 |
commit | e1562961c0bf87daa98417f2a660fbf8ebd04a35 (patch) | |
tree | 327d1b62d2b7087dd67a4e380a212fa12b9fce24 /libs/pbd/system_exec.cc | |
parent | 070bb7a8abcd787958b3ea07e77043dd404d653c (diff) |
Add command-line parsing constructor to SystemExec
Add a new constructor to SystemExec which takes a complete command-line
and a map of substitutions for %<char>, and parses the command line,
taking account of some simple escape sequences and quoting.
Diffstat (limited to 'libs/pbd/system_exec.cc')
-rw-r--r-- | libs/pbd/system_exec.cc | 113 |
1 files changed, 99 insertions, 14 deletions
diff --git a/libs/pbd/system_exec.cc b/libs/pbd/system_exec.cc index d26eedad6d..f270364660 100644 --- a/libs/pbd/system_exec.cc +++ b/libs/pbd/system_exec.cc @@ -144,9 +144,8 @@ static int close_allv(const int except_fds[]) { } #endif /* not on windows */ - -SystemExec::SystemExec (std::string c, std::string a) - : cmd(c) +void +SystemExec::init () { pthread_mutex_init(&write_lock, NULL); thread_active=false; @@ -154,12 +153,19 @@ SystemExec::SystemExec (std::string c, std::string a) pin[1] = -1; nicelevel = 0; envp = NULL; - argp = NULL; #ifdef __WIN32__ stdinP[0] = stdinP[1] = INVALID_HANDLE_VALUE; stdoutP[0] = stdoutP[1] = INVALID_HANDLE_VALUE; stderrP[0] = stderrP[1] = INVALID_HANDLE_VALUE; #endif +} + +SystemExec::SystemExec (std::string c, std::string a) + : cmd(c) +{ + init (); + + argp = NULL; make_envp(); make_argp(a); } @@ -167,21 +173,100 @@ SystemExec::SystemExec (std::string c, std::string a) SystemExec::SystemExec (std::string c, char **a) : cmd(c) , argp(a) { - pthread_mutex_init(&write_lock, NULL); - thread_active=false; - pid = 0; - pin[1] = -1; - nicelevel = 0; - envp = NULL; + init (); + #ifdef __WIN32__ - stdinP[0] = stdinP[1] = INVALID_HANDLE_VALUE; - stdoutP[0] = stdoutP[1] = INVALID_HANDLE_VALUE; - stderrP[0] = stderrP[1] = INVALID_HANDLE_VALUE; make_wargs(a); #endif make_envp(); } +SystemExec::SystemExec (std::string command, const std::map<char, std::string> subs) +{ + init (); + make_argp_escaped(command, subs); + cmd = argp[0]; + // cmd = strdup(argp[0]); + make_envp(); +} + +void +SystemExec::make_argp_escaped(std::string command, const std::map<char, std::string> subs) +{ + + int inquotes = 0; + int n = 0; + size_t i = 0; + std::string arg = ""; + + argp = (char **) malloc(sizeof(char *)); + + for (i = 0; i < command.length(); i++) { + char c = command.c_str()[i]; + if (inquotes) { + if (c == '"') { + inquotes = 0; + } else { + // still in quotes - just copy + arg += c; + } + } else switch (c) { + case '%' : + c = command.c_str()[++i]; + if (c == '%' || c == '\0') { + // "%%", "%" at end-of-string => "%" + arg += '%'; + } else { + // search subs for string to substitute for char + std::map<char, std::string>::const_iterator s = subs.find(c); + if (s != subs.end()) { + // found substitution + arg += s->second; + } else { + // not a valid substitution, just copy + arg += '%'; + arg += c; + } + } + break; + case '\\': + c = command.c_str()[++i]; + switch (c) { + case ' ' : + case '"' : arg += c; break; // "\\", "\" at end-of-string => "\" + case '\0': + case '\\': arg += '\\'; break; + default : arg += '\\'; arg += c; break; + } + break; + case '"' : + inquotes = 1; + break; + case ' ' : + case '\t': + if (arg.length() > 0) { + // if there wasn't already a space or tab, start a new parameter + argp = (char **) realloc(argp, (n + 2) * sizeof(char *)); + argp[n++] = strdup (arg.c_str()); + arg = ""; + } + break; + default : + arg += c; + break; + } + } + argp[n] = NULL; + + char *p = argp[0]; + n = 0; + do { + std::cerr << "argv[" << n << "] == \"" << p << "\"" << std::endl; + p = argp[n++]; + } while (p); + +} + SystemExec::~SystemExec () { terminate (); @@ -502,7 +587,7 @@ SystemExec::make_argp(std::string args) { *cp2 = '\0'; argp[argn++] = strdup(cp1); cp1 = cp2 + 1; - argp = (char **) realloc(argp, (argn + 1) * sizeof(char *)); + argp = (char **) realloc(argp, (argn + 1) * sizeof(char *)); } } if (cp2 != cp1) { |