diff options
Diffstat (limited to 'osdep-openbsd.c')
| -rw-r--r-- | osdep-openbsd.c | 158 |
1 files changed, 158 insertions, 0 deletions
diff --git a/osdep-openbsd.c b/osdep-openbsd.c new file mode 100644 index 00000000..f5c61372 --- /dev/null +++ b/osdep-openbsd.c @@ -0,0 +1,158 @@ +/* $OpenBSD$ */ + +/* + * 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> + +#include "compat.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) + +static struct kinfo_proc *cmp_procs(struct kinfo_proc *, struct kinfo_proc *); +char *osdep_get_name(int, char *); +char *osdep_get_cwd(int); +struct event_base *osdep_event_init(void); + +static 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 * +osdep_get_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); +} + +char * +osdep_get_cwd(int fd) +{ + int name[] = { CTL_KERN, KERN_PROC_CWD, 0 }; + static char path[MAXPATHLEN]; + size_t pathlen = sizeof path; + + if ((name[2] = tcgetpgrp(fd)) == -1) + return (NULL); + if (sysctl(name, 3, path, &pathlen, NULL, 0) != 0) + return (NULL); + return (path); +} + +struct event_base * +osdep_event_init(void) +{ + return (event_init()); +} |