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rewrite and add support for environment variable AFS_SYSCALL

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git-svn-id: svn://svn.h5l.se/heimdal/trunk/heimdal@5039 ec53bebd-3082-4978-b11e-865c3cabbd6b
This commit is contained in:
Assar Westerlund
1998-06-30 15:25:09 +00:00
parent 93095cb700
commit b1543d80a8
1 changed files with 104 additions and 57 deletions
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161
lib/kafs/afssys.c
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@@ -50,8 +50,12 @@ static int (*Setpag)(void);
#include "dlfcn.h"
/*
*
*/
static int
aix_setup(void)
try_aix(void)
{
#ifdef STATIC_AFS_SYSCALLS
Pioctl = aix_pioctl;
@@ -75,12 +79,14 @@ aix_setup(void)
else if (errno != ENOENT)
warn("%s", path);
}
return;
return 1;
}
Setpag = (int (*)(void))dlsym(ptr, "aix_setpag");
Pioctl = (int (*)(char*, int,
struct ViceIoctl*, int))dlsym(ptr, "aix_pioctl");
#endif
afs_entry_point = AIX_ENTRY_POINTS;
return 0;
}
#endif /* _AIX */
@@ -191,16 +197,62 @@ SIGSYS_handler(int sig)
#endif
/*
* Try to see if `syscall' is a pioctl. Return 0 iff succesful.
*/
static int
try_one (int syscall_num)
{
struct ViceIoctl parms;
memset(&parms, 0, sizeof(parms));
if (setjmp(catch_SIGSYS) == 0) {
syscall(syscall_num, AFSCALL_PIOCTL,
0, VIOCSETTOK, &parms, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0);
if (errno == EINVAL) {
afs_entry_point = SINGLE_ENTRY_POINT;
afs_syscalls[0] = syscall_num;
return 0;
}
}
return 1;
}
/*
* Try to see if `syscall_pioctl' is a pioctl syscall. Return 0 iff
* succesful.
*
*/
static int
try_two (int syscall_pioctl, int syscall_setpag)
{
struct ViceIoctl parms;
memset(&parms, 0, sizeof(parms));
if (setjmp(catch_SIGSYS) == 0) {
syscall(syscall_pioctl,
0, VIOCSETTOK, &parms, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0);
if (errno == EINVAL) {
afs_entry_point = MULTIPLE_ENTRY_POINT;
afs_syscalls[0] = syscall_pioctl;
afs_syscalls[1] = syscall_setpag;
return 0;
}
}
return 1;
}
int
k_hasafs(void)
{
int saved_errno;
RETSIGTYPE (*saved_func)();
struct ViceIoctl parms;
char *env = getenv ("AFS_SYSCALL");
/*
* Already checked presence of AFS syscalls?
*/
* Already checked presence of AFS syscalls? */
if (afs_entry_point != UNKNOWN_ENTRY_POINT)
return afs_entry_point != NO_ENTRY_POINT;
@@ -210,7 +262,6 @@ k_hasafs(void)
* If the syscall is absent we recive a SIGSYS.
*/
afs_entry_point = NO_ENTRY_POINT;
memset(&parms, 0, sizeof(parms));
saved_errno = errno;
#ifndef NO_AFS
@@ -218,71 +269,67 @@ k_hasafs(void)
saved_func = signal(SIGSYS, SIGSYS_handler);
#endif
#if defined(AFS_SYSCALL) || defined(AFS_SYSCALL2) || defined(AFS_SYSCALL3)
{
int tmp;
if (env != NULL && sscanf (env, "%d", &tmp) == 1)
if (try_one (tmp) == 0)
goto done;
}
#endif /* AFS_SYSCALL || AFS_SYSCALL2 || AFS_SYSCALL3 */
#ifdef AFS_SYSCALL
if (setjmp(catch_SIGSYS) == 0)
{
syscall(AFS_SYSCALL, AFSCALL_PIOCTL,
0, VIOCSETTOK, &parms, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0);
if (errno == EINVAL)
{
afs_entry_point = SINGLE_ENTRY_POINT;
afs_syscalls[0] = AFS_SYSCALL;
goto done;
}
}
if (try_one (AFS_SYSCALL) == 0)
goto done;
#endif /* AFS_SYSCALL */
#ifdef AFS_PIOCTL
if (setjmp(catch_SIGSYS) == 0)
{
syscall(AFS_PIOCTL,
0, VIOCSETTOK, &parms, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0);
if (errno == EINVAL)
{
afs_entry_point = MULTIPLE_ENTRY_POINT;
afs_syscalls[0] = AFS_PIOCTL;
afs_syscalls[1] = AFS_SETPAG;
goto done;
}
}
{
int tmp[2];
if (env != NULL && sscanf (env, "%d%d", &tmp[0], &tmp[1]) == 2)
if (try_two (tmp[0], tmp[1]) == 2)
goto done;
}
#endif /* AFS_PIOCTL */
#ifdef AFS_PIOCTL
if (try_two (AFS_PIOCTL, AFS_SETPAG) == 0)
goto done;
#endif /* AFS_PIOCTL */
#ifdef AFS_SYSCALL2
if (setjmp(catch_SIGSYS) == 0)
{
syscall(AFS_SYSCALL2, AFSCALL_PIOCTL,
0, VIOCSETTOK, &parms, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0);
if (errno == EINVAL)
{
afs_entry_point = SINGLE_ENTRY_POINT2;
afs_syscalls[0] = AFS_SYSCALL2;
goto done;
}
}
#endif /* AFS_SYSCALL */
if (try_one (AFS_SYSCALL2) == 0)
goto done;
#endif /* AFS_SYSCALL2 */
#ifdef AFS_SYSCALL3
if (setjmp(catch_SIGSYS) == 0)
{
syscall(AFS_SYSCALL3, AFSCALL_PIOCTL,
0, VIOCSETTOK, &parms, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0);
if (errno == EINVAL)
{
afs_entry_point = SINGLE_ENTRY_POINT3;
afs_syscalls[0] = AFS_SYSCALL3;
goto done;
}
}
#endif /* AFS_SYSCALL */
if (try_one (AFS_SYSCALL3) == 0)
goto done;
#endif /* AFS_SYSCALL3 */
#ifdef _AIX
aix_setup();
if(Pioctl != NULL && Setpag != NULL){
afs_entry_point = AIX_ENTRY_POINTS;
goto done;
#if 0
if (env != NULL) {
char *pos = NULL;
char *pioctl_name;
char *setpag_name;
pioctl_name = strtok_r (env, ", \t", &pos);
if (pioctl_name != NULL) {
setpag_name = strtok_r (NULL, ", \t", &pos);
if (setpag_name != NULL)
if (try_aix (pioctl_name, setpag_name) == 0)
goto done;
}
}
#endif
if(try_aix() == 0)
goto done;
#endif
done:
#ifdef SIGSYS
signal(SIGSYS, saved_func);