osdep-darwin.c

   1 /* $OpenBSD$ */
   2
   3 /*
   4  * Copyright (c) 2009 Joshua Elsasser <josh@elsasser.org>
   5  *
   6  * Permission to use, copy, modify, and distribute this software for any
   7  * purpose with or without fee is hereby granted, provided that the above
   8  * copyright notice and this permission notice appear in all copies.
   9  *
  10  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  11  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  12  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  13  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  14  * WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
  15  * IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
  16  * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  17  */
  18
  19 #include <sys/types.h>
  20 #include <sys/sysctl.h>
  21
  22 #include <Availability.h>
  23 #include <libproc.h>
  24 #include <stdlib.h>
  25 #include <string.h>
  26 #include <unistd.h>
  27
  28 #include "compat.h"
  29
  30 char                    *osdep_get_name(int, char *);
  31 char                    *osdep_get_cwd(int);
  32 struct event_base       *osdep_event_init(void);
  33
  34 #ifndef __unused
  35 #define __unused __attribute__ ((__unused__))
  36 #endif
  37
  38 char *
  39 osdep_get_name(int fd, __unused char *tty)
  40 {
  41 #ifdef __MAC_10_7
  42         struct proc_bsdshortinfo        bsdinfo;
  43         pid_t                           pgrp;
  44         int                             ret;
  45
  46         if ((pgrp = tcgetpgrp(fd)) == -1)
  47                 return (NULL);
  48
  49         ret = proc_pidinfo(pgrp, PROC_PIDT_SHORTBSDINFO, 0,
  50                         &bsdinfo, sizeof bsdinfo);
  51         if (ret == sizeof bsdinfo && *bsdinfo.pbsi_comm != '\0')
  52                 return (strdup(bsdinfo.pbsi_comm));
  53         return (NULL);
  54 #else
  55         int     mib[4] = { CTL_KERN, KERN_PROC, KERN_PROC_PID, 0 };
  56         size_t  size;
  57         struct kinfo_proc kp;
  58
  59         if ((mib[3] = tcgetpgrp(fd)) == -1)
  60                 return (NULL);
  61
  62         size = sizeof kp;
  63         if (sysctl(mib, 4, &kp, &size, NULL, 0) == -1)
  64                 return (NULL);
  65         if (size != (sizeof kp) || *kp.kp_proc.p_comm == '\0')
  66                 return (NULL);
  67
  68         return (strdup(kp.kp_proc.p_comm));
  69 #endif
  70 }
  71
  72 char *
  73 osdep_get_cwd(int fd)
  74 {
  75         static char                     wd[PATH_MAX];
  76         struct proc_vnodepathinfo       pathinfo;
  77         pid_t                           pgrp;
  78         int                             ret;
  79
  80         if ((pgrp = tcgetpgrp(fd)) == -1)
  81                 return (NULL);
  82
  83         ret = proc_pidinfo(pgrp, PROC_PIDVNODEPATHINFO, 0,
  84             &pathinfo, sizeof pathinfo);
  85         if (ret == sizeof pathinfo) {
  86                 strlcpy(wd, pathinfo.pvi_cdir.vip_path, sizeof wd);
  87                 return (wd);
  88         }
  89         return (NULL);
  90 }
  91
  92 struct event_base *
  93 osdep_event_init(void)
  94 {
  95         struct event_base       *base;
  96
  97         /*
  98          * On OS X, kqueue and poll are both completely broken and don't
  99          * work on anything except socket file descriptors (yes, really).
 100          */
 101         setenv("EVENT_NOKQUEUE", "1", 1);
 102         setenv("EVENT_NOPOLL", "1", 1);
 103
 104         base = event_init();
 105         unsetenv("EVENT_NOKQUEUE");
 106         unsetenv("EVENT_NOPOLL");
 107         return (base);
 108 }