PATCH: add more ulimit extensions from BSDs

[Stefan Neudorf <BM-2cXppXU4T67w7j6NCir9T1WdzBHmFgBnLj@xxxxxxxxxxxxx>]

On FreeBSD 10, ulimit -a shows at the end

  -N 11:                              unlimited
  -N 12:                              unlimited
  -N 13:                              unlimited

while sh's ulimit -a describes them as

  pseudo-terminals                (-p)  unlimited
  swap limit              (kbytes, -w)  unlimited
  kqueues                         (-k)  unlimited

and DragonFly only has

  posixlocks                      (-k)  unlimited

---
 Doc/Zsh/builtins.yo      |  4 ++++
 Src/Builtins/rlimits.awk |  4 ++++
 Src/Builtins/rlimits.c   | 46 ++++++++++++++++++++++++++++++++++++++++++++++
 configure.ac             |  4 ++++
 4 files changed, 58 insertions(+)

diff --git a/Doc/Zsh/builtins.yo b/Doc/Zsh/builtins.yo
index 6f33c02..54455a4 100644
--- a/Doc/Zsh/builtins.yo
+++ b/Doc/Zsh/builtins.yo
@@ -1013,6 +1013,10 @@ sitem(tt(sigpending))(Maximum number of pending signals.)
 sitem(tt(sockbufsize))(Maximum size of all socket buffers.)
 sitem(tt(stacksize))(Maximum stack size for each process.)
 sitem(tt(vmemorysize))(Maximum amount of virtual memory.)
+sitem(tt(posixlocks))(Maximum number of POSIX locks per user.)
+sitem(tt(pseudoterminals))(Maximum number of pseudo-terminals.)
+sitem(tt(swapuse))(Maximum amount of swap used.)
+sitem(tt(kqueues))(Maximum number of kqueues allocated.)
 endsitem()
 
 Which of these resource limits are available depends on the system.
diff --git a/Src/Builtins/rlimits.awk b/Src/Builtins/rlimits.awk
index bf91481..ccee49e 100644
--- a/Src/Builtins/rlimits.awk
+++ b/Src/Builtins/rlimits.awk
@@ -55,6 +55,10 @@ BEGIN {limidx = 0}
 	    if (limnam == "NICE") { msg[limnum] = "Nnice" }
 	    if (limnam == "RTPRIO") { msg[limnum] = "Nrt_priority" }
 	    if (limnam == "RTTIME") { msg[limnum] = "Urt_time" }
+	    if (limnam == "POSIXLOCKS") { msg[limnum] = "Nposixlocks" }
+	    if (limnam == "NPTS")    { msg[limnum] = "Npseudoterminals" }
+	    if (limnam == "SWAP")    { msg[limnum] = "Mswapuse" }
+	    if (limnam == "KQUEUES") { msg[limnum] = "Nkqueues" }
         }
     }
 }
diff --git a/Src/Builtins/rlimits.c b/Src/Builtins/rlimits.c
index eedfa96..3095109 100644
--- a/Src/Builtins/rlimits.c
+++ b/Src/Builtins/rlimits.c
@@ -386,6 +386,32 @@ printulimit(char *nam, int lim, int hard, int head)
 	    printf("-r: max rt priority                 ");
 	break;
 # endif /* HAVE_RLIMIT_RTPRIO */
+# ifdef HAVE_RLIMIT_POSIXLOCKS
+    case RLIMIT_POSIXLOCKS:
+	if (head)
+	    printf("-k: posixlocks                      ");
+	break;
+# endif /* HAVE_RLIMIT_POSIXLOCKS */
+# ifdef HAVE_RLIMIT_NPTS
+    case RLIMIT_NPTS:
+	if (head)
+	    printf("-p: pseudo-terminals                ");
+	break;
+# endif /* HAVE_RLIMIT_NPTS */
+# ifdef HAVE_RLIMIT_SWAP
+    case RLIMIT_SWAP:
+	if (head)
+	    printf("-w: swap limit (kbytes)             ");
+	if (limit != RLIM_INFINITY)
+	    limit /= 1024;
+	break;
+# endif /* HAVE_RLIMIT_SWAP */
+# ifdef HAVE_RLIMIT_KQUEUES
+    case RLIMIT_KQUEUES:
+	if (head)
+	    printf("-k: kqueues                         ");
+	break;
+# endif /* HAVE_RLIMIT_KQUEUES */
     default:
 	if (head)
 	    printf("-N %2d:                              ", lim);
@@ -844,6 +870,26 @@ bin_ulimit(char *name, char **argv, UNUSED(Options ops), UNUSED(int func))
 		    res = RLIMIT_RTPRIO;
 		    break;
 # endif
+# ifdef HAVE_RLIMIT_POSIXLOCKS
+		case 'k':
+		    res = RLIMIT_POSIXLOCKS;
+		    break;
+# endif
+# ifdef HAVE_RLIMIT_NPTS
+		case 'p':
+		    res = RLIMIT_NPTS;
+		    break;
+# endif
+# ifdef HAVE_RLIMIT_SWAP
+		case 'w':
+		    res = RLIMIT_SWAP;
+		    break;
+# endif
+# ifdef HAVE_RLIMIT_KQUEUES
+		case 'k':
+		    res = RLIMIT_KQUEUES;
+		    break;
+# endif
 		default:
 		    /* unrecognised limit */
 		    zwarnnam(name, "bad option: -%c", *options);
diff --git a/configure.ac b/configure.ac
index c3093f2..32872be 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1812,6 +1812,10 @@ zsh_LIMIT_PRESENT(RLIMIT_SIGPENDING)
 zsh_LIMIT_PRESENT(RLIMIT_MSGQUEUE)
 zsh_LIMIT_PRESENT(RLIMIT_NICE)
 zsh_LIMIT_PRESENT(RLIMIT_RTPRIO)
+zsh_LIMIT_PRESENT(RLIMIT_POSIXLOCKS)
+zsh_LIMIT_PRESENT(RLIMIT_NPTS)
+zsh_LIMIT_PRESENT(RLIMIT_SWAP)
+zsh_LIMIT_PRESENT(RLIMIT_KQUEUES)
 
 AH_TEMPLATE([RLIMIT_VMEM_IS_RSS],
 [Define to 1 if RLIMIT_VMEM and RLIMIT_RSS both exist and are equal.])