strace/m4/procfs.m4
Dmitry V. Levin 916adeda63 Split acinclude.m4
* Makefile.am (ACLOCAL_AMFLAGS): Add "-I m4".
* acinclude.m4: Remove.
* m4/includedir.m4: New file, with definition of AC_INCLUDEDIR from
acinclude.m4.
* m4/long_long.m4: New file, with definitions of AC_OFF_T_IS_LONG_LONG,
AC_RLIM_T_IS_LONG_LONG and AC_LITTLE_ENDIAN_LONG_LONG from acinclude.m4.
* m4/procfs.m4: New file, with definitions of AC_MP_PROCFS,
AC_POLLABLE_PROCFS and AC_STRUCT_PR_SYSCALL from acinclude.m4.
* m4/stat.m4: New file, with definition of AC_STAT64 from acinclude.m4.
* m4/statfs.m4: New file, with definition of AC_STATFS64 from
acinclude.m4.
* m4/warnings.m4: New file, with definition of AC_WARNFLAGS from
acinclude.m4.
2010-09-09 23:20:24 +00:00

152 lines
3.2 KiB
Plaintext

dnl ### A macro to determine if we have a "MP" type procfs
AC_DEFUN([AC_MP_PROCFS],
[AC_MSG_CHECKING(for MP procfs)
AC_CACHE_VAL(ac_cv_mp_procfs,
[AC_RUN_IFELSE([AC_LANG_SOURCE([[
#include <stdio.h>
#include <signal.h>
#include <sys/procfs.h>
main()
{
int pid;
char proc[32];
FILE *ctl;
FILE *status;
int cmd;
struct pstatus pstatus;
if ((pid = fork()) == 0) {
pause();
exit(0);
}
sprintf(proc, "/proc/%d/ctl", pid);
if ((ctl = fopen(proc, "w")) == NULL)
goto fail;
sprintf(proc, "/proc/%d/status", pid);
if ((status = fopen (proc, "r")) == NULL)
goto fail;
cmd = PCSTOP;
if (write (fileno (ctl), &cmd, sizeof cmd) < 0)
goto fail;
if (read (fileno (status), &pstatus, sizeof pstatus) < 0)
goto fail;
kill(pid, SIGKILL);
exit(0);
fail:
kill(pid, SIGKILL);
exit(1);
}
]])],[ac_cv_mp_procfs=yes],[ac_cv_mp_procfs=no],[
# Guess or punt.
case "$host_os" in
svr4.2*|svr5*)
ac_cv_mp_procfs=yes
;;
*)
ac_cv_mp_procfs=no
;;
esac
])])
AC_MSG_RESULT($ac_cv_mp_procfs)
if test "$ac_cv_mp_procfs" = yes
then
AC_DEFINE([HAVE_MP_PROCFS], 1,
[Define if you have a SVR4 MP type procfs.
I.E. /dev/xxx/ctl, /dev/xxx/status.
Also implies that you have the pr_lwp member in prstatus.])
fi
])
dnl ### A macro to determine if procfs is pollable.
AC_DEFUN([AC_POLLABLE_PROCFS],
[AC_MSG_CHECKING(for pollable procfs)
AC_CACHE_VAL(ac_cv_pollable_procfs,
[AC_RUN_IFELSE([AC_LANG_SOURCE([[
#include <stdio.h>
#include <signal.h>
#include <sys/procfs.h>
#include <sys/stropts.h>
#include <poll.h>
#ifdef HAVE_MP_PROCFS
#define PIOCSTOP PCSTOP
#define POLLWANT POLLWRNORM
#define PROC "/proc/%d/ctl"
#define PROC_MODE "w"
int IOCTL (int fd, int cmd, int arg) {
return write (fd, &cmd, sizeof cmd);
}
#else
#define POLLWANT POLLPRI
#define PROC "/proc/%d"
#define PROC_MODE "r+"
#define IOCTL ioctl
#endif
main()
{
int pid;
char proc[32];
FILE *pfp;
struct pollfd pfd;
if ((pid = fork()) == 0) {
pause();
exit(0);
}
sprintf(proc, PROC, pid);
if ((pfp = fopen(proc, PROC_MODE)) == NULL)
goto fail;
if (IOCTL(fileno(pfp), PIOCSTOP, NULL) < 0)
goto fail;
pfd.fd = fileno(pfp);
pfd.events = POLLWANT;
if (poll(&pfd, 1, 0) < 0)
goto fail;
if (!(pfd.revents & POLLWANT))
goto fail;
kill(pid, SIGKILL);
exit(0);
fail:
kill(pid, SIGKILL);
exit(1);
}
]])],[ac_cv_pollable_procfs=yes],[ac_cv_pollable_procfs=no],[
# Guess or punt.
case "$host_os" in
solaris2*|irix5*|svr4.2uw*|svr5*)
ac_cv_pollable_procfs=yes
;;
*)
ac_cv_pollable_procfs=no
;;
esac
])])
AC_MSG_RESULT($ac_cv_pollable_procfs)
if test "$ac_cv_pollable_procfs" = yes
then
AC_DEFINE([HAVE_POLLABLE_PROCFS], 1,
[Define if you have SVR4 and the poll system call works on /proc files.])
fi
])
dnl ### A macro to determine if the prstatus structure has a pr_syscall member.
AC_DEFUN([AC_STRUCT_PR_SYSCALL],
[AC_MSG_CHECKING(for pr_syscall in struct prstatus)
AC_CACHE_VAL(ac_cv_struct_pr_syscall,
[AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <sys/procfs.h>]], [[#ifdef HAVE_MP_PROCFS
pstatus_t s;
s.pr_lwp.pr_syscall
#else
prstatus_t s;
s.pr_syscall
#endif]])],[ac_cv_struct_pr_syscall=yes],[ac_cv_struct_pr_syscall=no])])
AC_MSG_RESULT($ac_cv_struct_pr_syscall)
if test "$ac_cv_struct_pr_syscall" = yes
then
AC_DEFINE([HAVE_PR_SYSCALL], 1,
[Define if the prstatus structure in sys/procfs.h has a pr_syscall member.])
fi
])