This is the mail archive of the cygwin mailing list for the Cygwin project.

Index Nav: [Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav: [Date Prev] [Date Next] [Thread Prev] [Thread Next]
Other format: [Raw text]

Forking a program in a thread

I would like to point out a regression, seemingly introduced in 1.7.10.
If a program is exec'ed after forking in a thread and the program is
a native Windows program, it (seemingly) fails to start.

Please, find attached a test case. You can try it with gvim, for example.
There's no problem with the cygwin version of gvim:

$ ./fork_in_thread /usr/bin/gvim

but trying to start the native windows version:

$ ./fork_in_thread "/cygdrive/c/Program Files/Vim/vim73/gvim"

fails, in the sense that nothing happens and no error is reported.
A workaround here is using env. Indeed, the following works:

$ ./fork_in_thread env "/cygdrive/c/Program Files/Vim/vim73/gvim"

However, what puzzles me is the fact that a wrapper (like the one below)
starting gvim by using system() and compiled with i686-pc-mingw32-gcc
works, too!

All the previous examples were working in 1.7.9.

----- wrapper.c -----
#include <stdio.h>
int main(void)
    system("\"C:/Program Files/Vim/vim73/gvim\"");
    return 0;


Attachment: fork_in_thread.c
Description: Text document

Problem reports:
Unsubscribe info:

Index Nav: [Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav: [Date Prev] [Date Next] [Thread Prev] [Thread Next]