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I would like my Cygwin programs to work from a DOS (CMD.exe) window, but I am having problems with some API calls. Here is a simple program that tries to create a semaphore ? it works fine when it is run from sh.exe (or in a mintty window), but it crashes when run in a DOS window. (The Cygwin service is running.) Is there a way to make it work in both environments? #include <stdio.h> #include <stdlib.h> #include <errno.h> #include <string.h> #include <sys/types.h> #include <sys/ipc.h> #include <sys/sem.h> #include <sys/shm.h> #include <sys/msg.h> #include <sys/errno.h> void main() { int master_semid, ftok_int; key_t semkey; int semkey_int; char semkeyfile[256]; /* use this executable to generate a key */ strcpy(semkeyfile, "semcreate.exe"); /* generate a key from it */ ftok_int=((int)(0xd4) & 0x000000ff); semkey = ftok(semkeyfile, ftok_int); if (semkey == -1) { fprintf(stderr, "ftok(%s, %d) failed\n", semkeyfile, ftok_int); exit(32); } semkey_int=semkey; /* get the id from the key */ master_semid = semget(semkey_int,8,0777|IPC_CREAT|IPC_EXCL); fprintf(stderr, "semget(%d,8,0777|create) returned %d -- errno=%d\n", semkey_int, master_semid, errno); if (master_semid == -1) { fprintf(stderr, "semaphore error\n"); } exit(0); } Steve Bardwell LBM Systems
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