Commit 7dc9ae43 authored by Michal Privoznik's avatar Michal Privoznik Committed by Paolo Bonzini
Browse files

util: Introduce qemu_get_pid_name 



This is a small helper that tries to fetch binary name for given
PID.

Signed-off-by: default avatarMichal Privoznik <mprivozn@redhat.com>
Message-Id: <4d75d475c1884f8e94ee8b1e57273ddf3ed68bf7.1474987617.git.mprivozn@redhat.com>
Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
parent 6a7b2b21

include/qemu/osdep.h

+10 −0
Original line number Diff line number Diff line
@@ -387,6 +387,16 @@ void os_mem_prealloc(int fd, char *area, size_t sz, Error **errp); 


int qemu_read_password(char *buf, int buf_size);



/**

 * qemu_get_pid_name:

 * @pid: pid of a process

 *

 * For given @pid fetch its name. Caller is responsible for

 * freeing the string when no longer needed.

 * Returns allocated string on success, NULL on failure.

 */

char *qemu_get_pid_name(pid_t pid);



/**

 * qemu_fork:

 *

util/oslib-posix.c

+27 −0
Original line number Diff line number Diff line
@@ -46,6 +46,7 @@ 


#ifdef __FreeBSD__

#include <sys/sysctl.h>

#include <libutil.h>

#endif



#include "qemu/mmap-alloc.h"
@@ -430,6 +431,32 @@ int qemu_read_password(char *buf, int buf_size) 
}





char *qemu_get_pid_name(pid_t pid)

{

    char *name = NULL;



#if defined(__FreeBSD__)

    /* BSDs don't have /proc, but they provide a nice substitute */

    struct kinfo_proc *proc = kinfo_getproc(pid);



    if (proc) {

        name = g_strdup(proc->ki_comm);

        free(proc);

    }

#else

    /* Assume a system with reasonable procfs */

    char *pid_path;

    size_t len;



    pid_path = g_strdup_printf("/proc/%d/cmdline", pid);

    g_file_get_contents(pid_path, &name, &len, NULL);

    g_free(pid_path);

#endif



    return name;

}





pid_t qemu_fork(Error **errp)

{

    sigset_t oldmask, newmask;

util/oslib-win32.c

+7 −0
Original line number Diff line number Diff line
@@ -575,6 +575,13 @@ int qemu_read_password(char *buf, int buf_size) 
}





char *qemu_get_pid_name(pid_t pid)

{

    /* XXX Implement me */

    abort();

}





pid_t qemu_fork(Error **errp)

{

    errno = ENOSYS;