#include <config.h>
#if defined(HAVE_PROCFS_H) || defined(HAVE_SYS_PROCFS_H)
# undef _FILE_OFFSET_BITS
# undef _LARGE_FILES
#endif
#include <sys/types.h>
#include <sys/param.h>
#include <sys/stat.h>
#if defined(MAJOR_IN_MKDEV)
# include <sys/mkdev.h>
#elif defined(MAJOR_IN_SYSMACROS)
# include <sys/sysmacros.h>
#endif
#include <stdio.h>
#ifdef STDC_HEADERS
# include <stdlib.h>
# include <stddef.h>
#else
# ifdef HAVE_STDLIB_H
# include <stdlib.h>
# endif
#endif
#ifdef HAVE_STRING_H
# if defined(HAVE_MEMORY_H) && !defined(STDC_HEADERS)
# include <memory.h>
# endif
# include <string.h>
#endif
#ifdef HAVE_STRINGS_H
# include <strings.h>
#endif
#ifdef HAVE_UNISTD_H
# include <unistd.h>
#endif
#include <errno.h>
#include <fcntl.h>
#include <limits.h>
#ifdef HAVE_DIRENT_H
# include <dirent.h>
# define NAMLEN(dirent) strlen((dirent)->d_name)
#else
# define dirent direct
# define NAMLEN(dirent) (dirent)->d_namlen
# ifdef HAVE_SYS_NDIR_H
# include <sys/ndir.h>
# endif
# ifdef HAVE_SYS_DIR_H
# include <sys/dir.h>
# endif
# ifdef HAVE_NDIR_H
# include <ndir.h>
# endif
#endif
#if defined(HAVE_STRUCT_KINFO_PROC_P_TDEV) || defined (HAVE_STRUCT_KINFO_PROC_KP_EPROC_E_TDEV) || defined(HAVE_STRUCT_KINFO_PROC2_P_TDEV)
# include <sys/sysctl.h>
#elif defined(HAVE_STRUCT_KINFO_PROC_KI_TDEV)
# include <sys/sysctl.h>
# include <sys/user.h>
#endif
#if defined(HAVE_PROCFS_H)
# include <procfs.h>
#elif defined(HAVE_SYS_PROCFS_H)
# include <sys/procfs.h>
#endif
#include "sudo.h"
#if defined(HAVE_STRUCT_KINFO_PROC2_P_TDEV)
# define SUDO_KERN_PROC KERN_PROC2
# define sudo_kinfo_proc kinfo_proc2
# define sudo_kp_tdev p_tdev
# define sudo_kp_namelen 6
#elif defined(HAVE_STRUCT_KINFO_PROC_P_TDEV)
# define SUDO_KERN_PROC KERN_PROC
# define sudo_kinfo_proc kinfo_proc
# define sudo_kp_tdev p_tdev
# define sudo_kp_namelen 6
#elif defined(HAVE_STRUCT_KINFO_PROC_KI_TDEV)
# define SUDO_KERN_PROC KERN_PROC
# define sudo_kinfo_proc kinfo_proc
# define sudo_kp_tdev ki_tdev
# define sudo_kp_namelen 4
#elif defined(HAVE_STRUCT_KINFO_PROC_KP_EPROC_E_TDEV)
# define SUDO_KERN_PROC KERN_PROC
# define sudo_kinfo_proc kinfo_proc
# define sudo_kp_tdev kp_eproc.e_tdev
# define sudo_kp_namelen 4
#endif
#if defined(sudo_kp_tdev)
static char *
sudo_ttyname_dev(dev_t tdev)
{
char *dev, *tty = NULL;
dev = devname(tdev, S_IFCHR);
if (dev != NULL && *dev != '?' && *dev != '#') {
if (*dev != '/') {
size_t len = sizeof(_PATH_DEV) + strlen(dev);
tty = emalloc(len);
strlcpy(tty, _PATH_DEV, len);
strlcat(tty, dev, len);
} else {
tty = estrdup(dev);
}
}
return tty;
}
#elif defined(HAVE__TTYNAME_DEV)
extern char *_ttyname_dev(dev_t rdev, char *buffer, size_t buflen);
static char *
sudo_ttyname_dev(dev_t tdev)
{
char buf[TTYNAME_MAX], *tty;
tty = _ttyname_dev(tdev, buf, sizeof(buf));
return estrdup(tty);
}
#else
static char *search_devs[] = {
"/dev/console",
"/dev/wscons",
"/dev/pts/",
"/dev/vt/",
"/dev/term/",
"/dev/zcons/",
NULL
};
static char *ignore_devs[] = {
"/dev/fd/",
"/dev/stdin",
"/dev/stdout",
"/dev/stderr",
NULL
};
static
char *sudo_ttyname_scan(dir, rdev, builtin)
const char *dir;
dev_t rdev;
int builtin;
{
DIR *d;
char pathbuf[PATH_MAX], **subdirs = NULL, *devname = NULL;
size_t sdlen, d_len, len, num_subdirs = 0, max_subdirs = 0;
struct dirent *dp;
struct stat sb;
int i;
if (dir[0] == '\0' || (d = opendir(dir)) == NULL)
goto done;
sdlen = strlen(dir);
if (dir[sdlen - 1] == '/')
sdlen--;
if (sdlen + 1 >= sizeof(pathbuf)) {
errno = ENAMETOOLONG;
warning("%.*s/", (int)sdlen, dir);
goto done;
}
memcpy(pathbuf, dir, sdlen);
pathbuf[sdlen++] = '/';
pathbuf[sdlen] = '\0';
while ((dp = readdir(d)) != NULL) {
if (dp->d_name[0] == '.')
continue;
d_len = NAMLEN(dp);
if (sdlen + d_len >= sizeof(pathbuf))
continue;
memcpy(&pathbuf[sdlen], dp->d_name, d_len + 1);
d_len += sdlen;
for (i = 0; ignore_devs[i] != NULL; i++) {
len = strlen(ignore_devs[i]);
if (ignore_devs[i][len - 1] == '/')
len--;
if (d_len == len && strncmp(pathbuf, ignore_devs[i], len) == 0)
break;
}
if (ignore_devs[i] != NULL)
continue;
if (!builtin) {
for (i = 0; search_devs[i] != NULL; i++) {
len = strlen(search_devs[i]);
if (search_devs[i][len - 1] == '/')
len--;
if (d_len == len && strncmp(pathbuf, search_devs[i], len) == 0)
break;
}
if (search_devs[i] != NULL)
continue;
}
# if defined(HAVE_STRUCT_DIRENT_D_TYPE) && defined(DTTOIF)
if (dp->d_type != DT_LNK && dp->d_type != DT_CHR)
sb.st_mode = DTTOIF(dp->d_type);
else
# endif
if (stat(pathbuf, &sb) == -1)
continue;
if (S_ISDIR(sb.st_mode)) {
if (!builtin) {
if (num_subdirs + 1 > max_subdirs) {
max_subdirs += 64;
subdirs = erealloc3(subdirs, max_subdirs, sizeof(char *));
}
subdirs[num_subdirs++] = estrdup(pathbuf);
}
continue;
}
if (S_ISCHR(sb.st_mode) && sb.st_rdev == rdev) {
devname = estrdup(pathbuf);
break;
}
}
closedir(d);
for (i = 0; devname == NULL && i < num_subdirs; i++)
devname = sudo_ttyname_scan(subdirs[i], rdev, FALSE);
done:
for (i = 0; i < num_subdirs; i++)
efree(subdirs[i]);
efree(subdirs);
return devname;
}
static char *
sudo_ttyname_dev(rdev)
dev_t rdev;
{
struct stat sb;
size_t len;
char buf[PATH_MAX], **sd, *devname, *tty = NULL;
for (sd = search_devs; (devname = *sd) != NULL; sd++) {
len = strlen(devname);
if (devname[len - 1] == '/') {
if (strcmp(devname, "/dev/pts/") == 0) {
(void)snprintf(buf, sizeof(buf), "%spts/%u", _PATH_DEV,
(unsigned int)minor(rdev));
if (stat(buf, &sb) == 0) {
if (S_ISCHR(sb.st_mode) && sb.st_rdev == rdev) {
tty = estrdup(buf);
break;
}
}
continue;
}
tty = sudo_ttyname_scan(devname, rdev, TRUE);
} else {
if (stat(devname, &sb) == 0) {
if (S_ISCHR(sb.st_mode) && sb.st_rdev == rdev) {
tty = estrdup(devname);
break;
}
}
}
}
if (tty == NULL)
tty = sudo_ttyname_scan(_PATH_DEV, rdev, FALSE);
return tty;
}
#endif
#if defined(sudo_kp_tdev)
char *
get_process_ttyname()
{
char *tty = NULL;
struct sudo_kinfo_proc *ki_proc = NULL;
size_t size = sizeof(*ki_proc);
int i, mib[6], rc;
for (i = 0; tty == NULL && i < 2; i++) {
mib[0] = CTL_KERN;
mib[1] = SUDO_KERN_PROC;
mib[2] = KERN_PROC_PID;
mib[3] = i ? (int)getppid() : (int)getpid();
mib[4] = sizeof(*ki_proc);
mib[5] = 1;
do {
size += size / 10;
ki_proc = erealloc(ki_proc, size);
rc = sysctl(mib, sudo_kp_namelen, ki_proc, &size, NULL, 0);
} while (rc == -1 && errno == ENOMEM);
if (rc != -1) {
if (ki_proc->sudo_kp_tdev != (dev_t)-1) {
tty = sudo_ttyname_dev(ki_proc->sudo_kp_tdev);
}
}
}
efree(ki_proc);
return tty;
}
#elif defined(HAVE_STRUCT_PSINFO_PR_TTYDEV)
char *
get_process_ttyname()
{
char path[PATH_MAX], *tty = NULL;
struct stat sb;
struct psinfo psinfo;
ssize_t nread;
int i, fd;
for (i = 0; tty == NULL && i < 2; i++) {
(void)snprintf(path, sizeof(path), "/proc/%u/psinfo",
i ? (unsigned int)getppid() : (unsigned int)getpid());
if ((fd = open(path, O_RDONLY, 0)) == -1)
continue;
nread = read(fd, &psinfo, sizeof(psinfo));
close(fd);
if (nread == (ssize_t)sizeof(psinfo) && psinfo.pr_ttydev != (dev_t)-1) {
tty = sudo_ttyname_dev(psinfo.pr_ttydev);
}
}
return tty;
}
#elif defined(__linux__)
char *
get_process_ttyname()
{
char *line = NULL, *tty = NULL;
size_t linesize = 0;
ssize_t len;
int i;
for (i = 0; tty == NULL && i < 2; i++) {
FILE *fp;
char path[PATH_MAX];
(void)snprintf(path, sizeof(path), "/proc/%u/stat",
i ? (unsigned int)getppid() : (unsigned int)getpid());
if ((fp = fopen(path, "r")) == NULL)
continue;
len = getline(&line, &linesize, fp);
fclose(fp);
if (len != -1) {
char *cp = line;
int field = 1;
while (*cp != '\0') {
if (*cp++ == ' ') {
if (++field == 7) {
dev_t tdev = (dev_t)atoi(cp);
if (tdev > 0)
tty = sudo_ttyname_dev(tdev);
break;
}
}
}
}
}
efree(line);
return tty;
}
#else
char *
get_process_ttyname()
{
char *tty;
if ((tty = ttyname(STDIN_FILENO)) == NULL) {
if ((tty = ttyname(STDOUT_FILENO)) == NULL)
tty = ttyname(STDERR_FILENO);
}
return estrdup(tty);
}
#endif