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Apparently NetBSD's tcgetpgrp is good enough to use, so don't need to play

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complicated games, from Roy Marples.
This commit is contained in:
Nicholas Marriott 2009-06-26 15:54:52 +00:00
parent de2ea2d178
commit 1aaf47e698
1 changed files with 13 additions and 81 deletions
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94
osdep-netbsd.c
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@ -1,3 +1,5 @@
/* $Id: osdep-netbsd.c,v 1.4 2009-06-26 15:54:52 nicm Exp $ */
/*
* Copyright (c) 2009 Nicholas Marriott <nicm@users.sourceforge.net>
*
@ -16,13 +18,8 @@
#include <sys/param.h>
#include <sys/proc.h>
#include <sys/stat.h>
#include <sys/sysctl.h>
#include <sys/user.h>
#include <errno.h>
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
@ -30,91 +27,26 @@
#define nitems(_a) (sizeof((_a)) / sizeof((_a)[0]))
#endif
#define is_runnable(p) \
((p)->p_stat == LSRUN || (p)->p_stat == SIDL)
#define is_stopped(p) \
((p)->p_stat == LSSTOP || (p)->p_stat == SZOMB)
char *osdep_get_name(int, char *);
char *
osdep_get_name(int fd, char *tty)
osdep_get_name(int fd, __unused char *tty)
{
int mib[4] = { CTL_KERN, KERN_PROC2, KERN_PROC_PGRP, 0 };
struct stat sb;
int mib[6];
size_t len;
struct kinfo_proc2 *buf, *newbuf, *p, *bestp;
u_int i;
char *name;
struct kinfo_proc2 p;
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)
len = sizeof(p);
mib[0] = CTL_KERN;
mib[1] = KERN_PROC2;
mib[2] = KERN_PROC_PID;
mib[4] = sizeof(p);
mib[5] = 1;
if (sysctl(mib, nitems(mib), &p, &len, NULL, 0) == -1)
return (NULL);
len = (len * 5) / 4;
if ((newbuf = realloc(buf, len)) == NULL) {
free(buf);
return (NULL);
}
buf = newbuf;
if (sysctl(mib, nitems(mib), buf, &len, NULL, 0) == -1) {
if (errno == ENOMEM)
goto retry;
free(buf);
return (NULL);
}
bestp = NULL;
for (i = 0; i < len / sizeof (struct kinfo_proc); i++) {
if (buf[i].p_tdev != sb.st_rdev)
continue;
p = &buf[i];
if (bestp == NULL) {
bestp = p;
continue;
}
if (is_runnable(p) && !is_runnable(bestp))
bestp = p;
else if (!is_runnable(p) && is_runnable(bestp))
continue;
if (!is_stopped(p) && is_stopped(bestp))
bestp = p;
else if (is_stopped(p) && !is_stopped(bestp))
continue;
if (p->p_estcpu > bestp->p_estcpu)
bestp = p;
else if (p->p_estcpu < bestp->p_estcpu)
continue;
if (p->p_slptime < bestp->p_slptime)
bestp = p;
else if (p->p_slptime > bestp->p_slptime)
continue;
if (strcmp(p->p_comm, p->p_comm) < 0)
bestp = p;
else if (strcmp(p->p_comm, p->p_comm) > 0)
continue;
if (p->p_pid > bestp->p_pid)
bestp = p;
}
name = NULL;
if (bestp != NULL)
name = strdup(bestp->p_comm);
free(buf);
return (name);
return (strdup(p.p_comm));
}