Thank you Reini.
However when I use this function it returns -1. Here's my program,
sample output and strace snip:
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <strings.h>
#include <unistd.h>
pid_t pid;
pid_t cygwin_pid;
int res;
extern pid_t cygwin_winpid_to_pid(int);
int
main(
int argc,
char **argv)
{
if (argc == 2) {
pid = atol(argv[1]);
}
else {
fprintf(stderr, "Missing process id\n");
exit(1);
}
printf("\nChecking for cygwin pid of pid %d", pid);
cygwin_pid = cygwin_winpid_to_pid(pid);
printf("\nCygwin pid found for pid %d is %d", pid, cygwin_pid);
if (cygwin_pid != -1) {
printf("\nCheck for running using cygwin pid");
res=kill(cygwin_pid, 0);
printf("\nkill(%d, 0) = %d", cygwin_pid, res);
}
else {
printf("\nFailed to get cygwin pid.");
exit(-1);
}
if (res == -1) {
printf("\nExitting 0");
exit(0);
} else {
printf("\nExitting 1");
exit(1);
}
}
This outputs:
D:\>testkill 1980
Checking for cygwin pid of pid 1980
Cygwin pid found for pid 1980 is -1
Failed to get cygwin pid.
ps output is:
D:\>ps -W | grep mysql
2744 1 1384 1980 ? 18 15:07:22
/drives/c/mysql/bin/mysqld-nt
1980 0 0 1980 ? 0 15:07:23
c:\mysql\bin\mysqld-nt.exe
strace snip (I removed printf statements and recompiled):
1662 221904 [main] testkill 3952 fhandler_console::open: opened
conin$ 0x3, conout$ 0x17
1185 223089 [main] testkill 3952 fhandler_console::output_tcsetattr:
0 = tcsetattr (,6002001C) (ENABLE FLAGS 3) (lflag 107 oflag 9)
1263 224352 [main] testkill 3952 build_fh_pc: fh 0x61168BD8
607 224959 [main] testkill 3952 fhandler_base::set_flags: flags
0x10002, supplied_bin 0x0
1133 226092 [main] testkill 3952 fhandler_base::set_flags:
O_TEXT/O_BINARY set in flags 0x10000
1140 227232 [main] testkill 3952 fhandler_base::set_flags: filemode
set to binary
1230 228462 [main] testkill 3952 init_cygheap::manage_console_count:
fhandler_console::open: console_count 3, amount 1, ctty /dev/console,
avoid_freeing_console 0
1695 230157 [main] testkill 3952 fhandler_console::open: opened
conin$ 0x7, conout$ 0x1B
1177 231334 [main] testkill 3952 fhandler_console::output_tcsetattr:
0 = tcsetattr (,6002001C) (ENABLE FLAGS 3) (lflag 107 oflag 9)
1236 232570 [main] testkill 3952 fhandler_console::need_invisible:
invisible_console 0
1124 233694 [main] testkill 3952 dll_crt0_1: user_data->main 0x401050
611 234305 [main] testkill 3952 __set_errno: void dll_crt0_1(void*):946 val 0
1276 235581 [main] testkill 3952 __set_errno: pid_t
cygwin_winpid_to_pid(int):1086 val 3
1373 236954 [main] testkill 3952 close: close (0)
648 237602 [main] testkill 3952 init_cygheap::manage_console_count:
fhandler_console::close: console_count 2, amount -1, ctty
/dev/console, avoid_freeing_console 0
1655 239257 [main] testkill 3952 close: 0 = close (0)
919 240176 [main] testkill 3952 close: close (1)
674 240850 [main] testkill 3952 init_cygheap::manage_console_count:
fhandler_console::close: console_count 1, amount -1, ctty
/dev/console, avoid_freeing_console 0
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