[SPARC]: avoid CHILD_MAX and OPEN_MAX constants

I don't figure anyone really cares about SunOS syscall emulation, and I
certainly don't.  But I'm getting rid of uses of the OPEN_MAX and CHILD_MAX
compile-time constant, and these are almost the only ones.  OPEN_MAX is a
bogus constant with no meaning about anything.  The RLIMIT_NOFILE resource
limit is what sysconf (_SC_OPEN_MAX) actually wants to return.

The CHILD_MAX cases weren't actually using anything I want to get rid of,
but I noticed that they are there and are wrong too.  The CHILD_MAX value
is not really unlimited as a -1 return from sysconf indicates.  The
RLIMIT_NPROC resource limit is what sysconf (_SC_CHILD_MAX) wants to return.

Signed-off-by: Roland McGrath <roland@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

3 files changed, 8 insertions, 6 deletions

diff --git a/arch/sparc/kernel/sys_sunos.c b/arch/sparc/kernel/sys_sunos.c
index da6606f0cffc..f807172cab0e 100644
--- a/arch/sparc/kernel/sys_sunos.c
+++ b/arch/sparc/kernel/sys_sunos.c
@@ -910,7 +910,7 @@ asmlinkage long sunos_sysconf (int name)
                 ret = ARG_MAX;
                 break;
         case _SC_CHILD_MAX:
-                ret = -1; /* no limit */
+                ret = current->signal->rlim[RLIMIT_NPROC].rlim_cur;
                 break;
         case _SC_CLK_TCK:
                 ret = HZ;
@@ -919,7 +919,7 @@ asmlinkage long sunos_sysconf (int name)
                 ret = NGROUPS_MAX;
                 break;
         case _SC_OPEN_MAX:
-                ret = OPEN_MAX;
+                ret = current->signal->rlim[RLIMIT_NOFILE].rlim_cur;
                 break;
         case _SC_JOB_CONTROL:
                 ret = 1;        /* yes, we do support job control */
diff --git a/arch/sparc64/kernel/sys_sunos32.c b/arch/sparc64/kernel/sys_sunos32.c
index 4cff95b7b3a4..8f7a06e2c7e7 100644
--- a/arch/sparc64/kernel/sys_sunos32.c
+++ b/arch/sparc64/kernel/sys_sunos32.c
@@ -871,7 +871,7 @@ asmlinkage s32 sunos_sysconf (int name)
                 ret = ARG_MAX;
                 break;
         case _SC_CHILD_MAX:
-                ret = -1; /* no limit */
+                ret = current->signal->rlim[RLIMIT_NPROC].rlim_cur;
                 break;
         case _SC_CLK_TCK:
                 ret = HZ;
@@ -880,7 +880,7 @@ asmlinkage s32 sunos_sysconf (int name)
                 ret = NGROUPS_MAX;
                 break;
         case _SC_OPEN_MAX:
-                ret = OPEN_MAX;
+                ret = current->signal->rlim[RLIMIT_NOFILE].rlim_cur;
                 break;
         case _SC_JOB_CONTROL:
                 ret = 1;        /* yes, we do support job control */
diff --git a/arch/sparc64/solaris/misc.c b/arch/sparc64/solaris/misc.c
index bca16e8c95c3..9fcaad6dd11f 100644
--- a/arch/sparc64/solaris/misc.c
+++ b/arch/sparc64/solaris/misc.c
@@ -363,8 +363,10 @@ asmlinkage int solaris_sysconf(int id)
 {
         switch (id) {
         case SOLARIS_CONFIG_NGROUPS:    return NGROUPS_MAX;
-        case SOLARIS_CONFIG_CHILD_MAX:  return -1; /* no limit */
-        case SOLARIS_CONFIG_OPEN_FILES: return OPEN_MAX;
+        case SOLARIS_CONFIG_CHILD_MAX:
+                return current->signal->rlim[RLIMIT_NPROC].rlim_cur;
+        case SOLARIS_CONFIG_OPEN_FILES:
+                return current->signal->rlim[RLIMIT_NOFILE].rlim_cur;
         case SOLARIS_CONFIG_POSIX_VER:  return 199309;
         case SOLARIS_CONFIG_PAGESIZE:   return PAGE_SIZE;
         case SOLARIS_CONFIG_XOPEN_VER:  return 3;