mirror of
https://github.com/openshift/source-to-image.git
synced 2026-02-05 12:44:54 +01:00
251057d7f3
- enable use of cygwin to build and test s2i - simplify git and file downloaders - track posix file permissions on windows - remove unnecessary runtime.GOOS == "windows" checks - unit test fixes
117 lines
2.7 KiB
C
117 lines
2.7 KiB
C
// sigintwrap: wrapper for non-Cygwin executables, capturing Cygwin SIGINTs and
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// forwarding them as a CTRL+BREAK events to the non-Cygwin executable. After
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// "Solution For Handling Signals In Non-Cygwin Apps With
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// SetConsoleCtrlHandler", Anthony DeRosa,
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// http://marc.info/?l=cygwin&m=111047278517873
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#include <sys/cygwin.h>
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#include <pthread.h>
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#include <signal.h>
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#include <stdio.h>
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#include <unistd.h>
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#include <windows.h>
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static PROCESS_INFORMATION pi;
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static void *
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wait_for_process(void *ptr) {
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WaitForSingleObject(pi.hProcess, INFINITE);
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return NULL;
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}
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static void
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sigint(int signal) {
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GenerateConsoleCtrlEvent(CTRL_BREAK_EVENT, pi.dwProcessId);
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}
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static int
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needs_path_conversion(const char *s) {
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// See winsup/cygwin/environ.cc.
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return !(strncmp(s, "HOME=", 5) &&
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strncmp(s, "LD_LIBRARY_PATH=", 16) &&
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strncmp(s, "PATH=", 5) &&
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strncmp(s, "TEMP=", 5) &&
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strncmp(s, "TMP=", 4) &&
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strncmp(s, "TMPDIR=", 7));
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}
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static char *
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prepare_env() {
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char **p;
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int len = 1;
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for(p = environ; *p; p++)
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if(needs_path_conversion(*p)) {
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char *eq = strchr(*p, '=');
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len += eq - *p + 1;
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len += cygwin_conv_path_list(CCP_POSIX_TO_WIN_A, eq + 1, NULL, 0);
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} else
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len += strlen(*p) + 1;
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char *env = (char *)malloc(len);
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char *e = env;
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for(p = environ; *p; p++)
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if(needs_path_conversion(*p)) {
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char *eq = strchr(*p, '=');
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e = stpncpy(e, *p, eq - *p + 1);
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cygwin_conv_path_list(CCP_POSIX_TO_WIN_A, eq + 1, e, env + len - e - 1);
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while(*e++);
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} else
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e = stpcpy(e, *p) + 1;
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*e = '\0';
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return env;
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}
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int
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main(int argc, char **argv) {
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if(argc != 2) {
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fprintf(stderr, "usage: %s 'c:\\path\\to\\command.exe [arg...]'\n",
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argv[0]);
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return 1;
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}
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STARTUPINFO si;
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ZeroMemory(&si, sizeof(si));
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si.cb = sizeof(si);
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char *env = prepare_env();
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if(!CreateProcess(NULL, argv[1], NULL, NULL, FALSE, CREATE_NEW_PROCESS_GROUP,
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env, NULL, &si, &pi)) {
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LPTSTR msg;
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FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM |
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FORMAT_MESSAGE_IGNORE_INSERTS, NULL, GetLastError(), 0,
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(LPTSTR)&msg, 0, NULL);
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fputs(msg, stderr);
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LocalFree(msg);
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free(env);
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return 1;
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}
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free(env);
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signal(SIGINT, sigint);
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// We call WaitForSingleObject on another thread because it cannot be
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// interrupted by cygwin signals. pthread_join can be.
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pthread_t thread;
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pthread_create(&thread, NULL, wait_for_process, NULL);
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pthread_join(thread, NULL);
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DWORD exitcode;
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GetExitCodeProcess(pi.hProcess, &exitcode);
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CloseHandle(pi.hProcess);
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CloseHandle(pi.hThread);
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return exitcode;
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}
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