mirror of
https://github.com/tmate-io/tmate.git
synced 2024-11-27 02:23:15 +01:00
135 lines
3.2 KiB
C
135 lines
3.2 KiB
C
/* $OpenBSD$ */
|
|
|
|
/*
|
|
* Copyright (c) 2009 Nicholas Marriott <nicholas.marriott@gmail.com>
|
|
*
|
|
* Permission to use, copy, modify, and distribute this software for any
|
|
* purpose with or without fee is hereby granted, provided that the above
|
|
* copyright notice and this permission notice appear in all copies.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
|
|
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
|
|
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
|
|
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
|
|
* WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
|
|
* IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
|
|
* OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
|
|
*/
|
|
|
|
#include <sys/param.h> /* MAXCOMLEN */
|
|
#include <sys/types.h>
|
|
#include <sys/proc.h>
|
|
#include <sys/sysctl.h>
|
|
#include <sys/stat.h>
|
|
|
|
#include <errno.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <unistd.h>
|
|
|
|
#ifndef nitems
|
|
#define nitems(_a) (sizeof((_a)) / sizeof((_a)[0]))
|
|
#endif
|
|
|
|
#define is_runnable(p) \
|
|
((p)->p_stat == SRUN || (p)->p_stat == SIDL || (p)->p_stat == SONPROC)
|
|
#define is_stopped(p) \
|
|
((p)->p_stat == SSTOP || (p)->p_stat == SDEAD)
|
|
|
|
struct kinfo_proc *cmp_procs(struct kinfo_proc *, struct kinfo_proc *);
|
|
char *get_proc_name(int, char *);
|
|
|
|
struct kinfo_proc *
|
|
cmp_procs(struct kinfo_proc *p1, struct kinfo_proc *p2)
|
|
{
|
|
if (is_runnable(p1) && !is_runnable(p2))
|
|
return (p1);
|
|
if (!is_runnable(p1) && is_runnable(p2))
|
|
return (p2);
|
|
|
|
if (is_stopped(p1) && !is_stopped(p2))
|
|
return (p1);
|
|
if (!is_stopped(p1) && is_stopped(p2))
|
|
return (p2);
|
|
|
|
if (p1->p_estcpu > p2->p_estcpu)
|
|
return (p1);
|
|
if (p1->p_estcpu < p2->p_estcpu)
|
|
return (p2);
|
|
|
|
if (p1->p_slptime < p2->p_slptime)
|
|
return (p1);
|
|
if (p1->p_slptime > p2->p_slptime)
|
|
return (p2);
|
|
|
|
if ((p1->p_flag & P_SINTR) && !(p2->p_flag & P_SINTR))
|
|
return (p1);
|
|
if (!(p1->p_flag & P_SINTR) && (p2->p_flag & P_SINTR))
|
|
return (p2);
|
|
|
|
if (strcmp(p1->p_comm, p2->p_comm) < 0)
|
|
return (p1);
|
|
if (strcmp(p1->p_comm, p2->p_comm) > 0)
|
|
return (p2);
|
|
|
|
if (p1->p_pid > p2->p_pid)
|
|
return (p1);
|
|
return (p2);
|
|
}
|
|
|
|
char *
|
|
get_proc_name(int fd, char *tty)
|
|
{
|
|
int mib[6] = { CTL_KERN, KERN_PROC, KERN_PROC_PGRP, 0,
|
|
sizeof(struct kinfo_proc), 0 };
|
|
struct stat sb;
|
|
size_t len;
|
|
struct kinfo_proc *buf, *newbuf, *bestp;
|
|
u_int i;
|
|
char *name;
|
|
|
|
buf = NULL;
|
|
|
|
if (stat(tty, &sb) == -1)
|
|
return (NULL);
|
|
if ((mib[3] = tcgetpgrp(fd)) == -1)
|
|
return (NULL);
|
|
|
|
retry:
|
|
if (sysctl(mib, nitems(mib), NULL, &len, NULL, 0) == -1)
|
|
goto error;
|
|
len = (len * 5) / 4;
|
|
|
|
if ((newbuf = realloc(buf, len)) == NULL)
|
|
goto error;
|
|
buf = newbuf;
|
|
|
|
mib[5] = (int)(len / sizeof(struct kinfo_proc));
|
|
if (sysctl(mib, nitems(mib), buf, &len, NULL, 0) == -1) {
|
|
if (errno == ENOMEM)
|
|
goto retry;
|
|
goto error;
|
|
}
|
|
|
|
bestp = NULL;
|
|
for (i = 0; i < len / sizeof (struct kinfo_proc); i++) {
|
|
if ((dev_t)buf[i].p_tdev != sb.st_rdev)
|
|
continue;
|
|
if (bestp == NULL)
|
|
bestp = &buf[i];
|
|
else
|
|
bestp = cmp_procs(&buf[i], bestp);
|
|
}
|
|
|
|
name = NULL;
|
|
if (bestp != NULL)
|
|
name = strdup(bestp->p_comm);
|
|
|
|
free(buf);
|
|
return (name);
|
|
|
|
error:
|
|
free(buf);
|
|
return (NULL);
|
|
}
|