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Add support for determining tty via sysctl on other BSD variants.

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This commit is contained in:
Todd C. Miller
2012-01-10 16:49:24 -05:00
parent 5c59576eac
commit 528258aff5
4 changed files with 92 additions and 14 deletions
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28
src/sudo.c
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@@ -89,7 +89,9 @@
#ifdef HAVE_PRIV_SET
# include <priv.h>
#endif
#ifdef HAVE_STRUCT_KINFO_PROC_KI_TDEV
#if defined(HAVE_STRUCT_KINFO_PROC_P_TDEV) || defined (HAVE_STRUCT_KINFO_PROC_KP_EPROC_E_TDEV)
# include <sys/sysctl.h>
#elif defined(HAVE_STRUCT_KINFO_PROC_KI_TDEV)
# include <sys/sysctl.h>
# include <sys/user.h>
#endif
@@ -424,7 +426,21 @@ get_user_groups(struct user_details *ud)
debug_return_str(gid_list);
}
#ifdef HAVE_STRUCT_KINFO_PROC_KI_TDEV
/*
* How to access the tty device number in struct kinfo_proc.
*/
#if defined(HAVE_STRUCT_KINFO_PROC_KP_EPROC_E_TDEV)
# define sudo_kp_tdev kp_eproc.e_tdev
# define sudo_kp_namelen 4
#elif defined(HAVE_STRUCT_KINFO_PROC_KI_TDEV)
# define sudo_kp_tdev ki_tdev
# define sudo_kp_namelen 4
#elif defined(HAVE_STRUCT_KINFO_PROC_P_TDEV)
# define sudo_kp_tdev p_tdev
# define sudo_kp_namelen 6
#endif
#ifdef sudo_kp_tdev
/*
* Return a string from ttyname() containing the tty to which the process is
* attached or NULL if there is no tty associated with the process (or its
@@ -437,7 +453,7 @@ get_process_tty(void)
char *tty = NULL;
struct kinfo_proc *ki_proc = NULL;
size_t size = sizeof(*ki_proc);
int i, mib[4], rc;
int i, mib[6], rc;
debug_decl(get_process_tty, SUDO_DEBUG_UTIL)
/*
@@ -449,13 +465,15 @@ get_process_tty(void)
mib[1] = 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, 4, ki_proc, &size, NULL, 0);
rc = sysctl(mib, sudo_kp_namelen, ki_proc, &size, NULL, 0);
} while (rc == -1 && errno == ENOMEM);
if (rc != -1)
tty = devname(ki_proc->ki_tdev, S_IFCHR);
tty = devname(ki_proc->sudo_kp_tdev, S_IFCHR);
}
/* If all else fails, fall back on ttyname(). */