From 48bfee4e5b72db021da3538c97ef68ce2308f12b Mon Sep 17 00:00:00 2001
From: rsc <devnull@localhost>
Date: Tue, 4 Jan 2005 22:30:15 +0000
Subject: in with the new

---
 src/lib9/_p9proc-Linux.c  |   5 --
 src/lib9/_p9proc-getpid.c | 113 ----------------------------------------------
 src/lib9/_p9proc.c        | 113 ----------------------------------------------
 src/lib9/execl.c          |  29 ++++++++++++
 4 files changed, 29 insertions(+), 231 deletions(-)
 delete mode 100644 src/lib9/_p9proc-Linux.c
 delete mode 100644 src/lib9/_p9proc-getpid.c
 delete mode 100644 src/lib9/_p9proc.c
 create mode 100644 src/lib9/execl.c

(limited to 'src')

diff --git a/src/lib9/_p9proc-Linux.c b/src/lib9/_p9proc-Linux.c
deleted file mode 100644
index 902a9579..00000000
--- a/src/lib9/_p9proc-Linux.c
+++ /dev/null
@@ -1,5 +0,0 @@
-#ifdef __Linux26__
-#include "_p9proc-pthread.c"
-#else
-#include "_p9proc-getpid.c"
-#endif
diff --git a/src/lib9/_p9proc-getpid.c b/src/lib9/_p9proc-getpid.c
deleted file mode 100644
index 9543bf24..00000000
--- a/src/lib9/_p9proc-getpid.c
+++ /dev/null
@@ -1,113 +0,0 @@
-/*
- * This needs to be callable from a signal handler, so it has been
- * written to avoid locks.  The only lock is the one used to acquire
- * an entry in the table, and we make sure that acquiring is done
- * when not in a handler.  Lookup and delete do not need locks.
- * It's a scan-forward hash table.  To avoid breaking chains, 
- * T ((void*)-1) is used as a non-breaking nil.
- */
-
-#include <u.h>
-#include <libc.h>
-#include "9proc.h"
-
-enum { PIDHASH = 1021 };
-
-#define T ((void*)-1)
-static Uproc *alluproc[PIDHASH];
-static int allupid[PIDHASH];
-static Lock uproclock;
-
-void
-_clearuproc(void)
-{
-	int i;
-
-	/* called right after fork - no locking needed */
-	for(i=0; i<PIDHASH; i++)
-		if(alluproc[i] != T && alluproc[i] != 0)
-			free(alluproc[i]);
-	memset(alluproc, 0, sizeof alluproc);
-	memset(allupid, 0, sizeof allupid);
-}
-		
-Uproc*
-_p9uproc(int inhandler)
-{
-	int i, h, pid;
-	Uproc *up;
-
-	/* for now, assume getpid is fast or cached */
-	pid = getpid();
-
-	/*
-	 * this part - the lookup - needs to run without locks
-	 * so that it can safely be called from within the notify handler.
-	 * notify calls _p9uproc, and fork and rfork call _p9uproc
-	 * in both parent and child, so if we're in a signal handler,
-	 * we should find something in the table.
-	 */
-	h = pid%PIDHASH;
-	for(i=0; i<PIDHASH; i++){
-		up = alluproc[h];
-		if(up == nil)
-			break;
-		if(allupid[h] == pid)
-			return up;
-		if(++h == PIDHASH)
-			h = 0;
-	}
-
-	if(inhandler){
-		fprint(2, "%s: did not find uproc for pid %d in signal handler\n", argv0, pid);
-		abort();	
-	}
-
-	/* need to allocate */
-	while((up = mallocz(sizeof(Uproc), 1)) == nil)
-		sleep(1000);
-
-	/* fprint(2, "alloc uproc for pid %d\n", pid); */
-	up->pid = pid;
-	lock(&uproclock);
-	h = pid%PIDHASH;
-	for(i=0; i<PIDHASH; i++){
-		if(alluproc[h]==T || alluproc[h]==nil){
-			alluproc[h] = up;
-			allupid[h] = pid;
-			unlock(&uproclock);
-			return up;
-		}
-		if(++h == PIDHASH)
-			h = 0;
-	}
-	unlock(&uproclock);
-
-	/* out of pids! */
-	sysfatal("too many processes in uproc table");
-	return nil;
-}
-
-void
-_p9uprocdie(void)
-{
-	Uproc *up;
-	int pid, i, h;
-
-	pid = getpid();
-	/* fprint(2, "reap uproc for pid %d\n", pid); */
-	h = pid%PIDHASH;
-	for(i=0; i<PIDHASH; i++){
-		up = alluproc[h];
-		if(up == nil)
-			break;
-		if(up == T)
-			continue;
-		if(allupid[h] == pid){
-			up = alluproc[h];
-			alluproc[h] = T;
-			free(up);
-			allupid[h] = 0;
-		}
-	}
-}
diff --git a/src/lib9/_p9proc.c b/src/lib9/_p9proc.c
deleted file mode 100644
index 9543bf24..00000000
--- a/src/lib9/_p9proc.c
+++ /dev/null
@@ -1,113 +0,0 @@
-/*
- * This needs to be callable from a signal handler, so it has been
- * written to avoid locks.  The only lock is the one used to acquire
- * an entry in the table, and we make sure that acquiring is done
- * when not in a handler.  Lookup and delete do not need locks.
- * It's a scan-forward hash table.  To avoid breaking chains, 
- * T ((void*)-1) is used as a non-breaking nil.
- */
-
-#include <u.h>
-#include <libc.h>
-#include "9proc.h"
-
-enum { PIDHASH = 1021 };
-
-#define T ((void*)-1)
-static Uproc *alluproc[PIDHASH];
-static int allupid[PIDHASH];
-static Lock uproclock;
-
-void
-_clearuproc(void)
-{
-	int i;
-
-	/* called right after fork - no locking needed */
-	for(i=0; i<PIDHASH; i++)
-		if(alluproc[i] != T && alluproc[i] != 0)
-			free(alluproc[i]);
-	memset(alluproc, 0, sizeof alluproc);
-	memset(allupid, 0, sizeof allupid);
-}
-		
-Uproc*
-_p9uproc(int inhandler)
-{
-	int i, h, pid;
-	Uproc *up;
-
-	/* for now, assume getpid is fast or cached */
-	pid = getpid();
-
-	/*
-	 * this part - the lookup - needs to run without locks
-	 * so that it can safely be called from within the notify handler.
-	 * notify calls _p9uproc, and fork and rfork call _p9uproc
-	 * in both parent and child, so if we're in a signal handler,
-	 * we should find something in the table.
-	 */
-	h = pid%PIDHASH;
-	for(i=0; i<PIDHASH; i++){
-		up = alluproc[h];
-		if(up == nil)
-			break;
-		if(allupid[h] == pid)
-			return up;
-		if(++h == PIDHASH)
-			h = 0;
-	}
-
-	if(inhandler){
-		fprint(2, "%s: did not find uproc for pid %d in signal handler\n", argv0, pid);
-		abort();	
-	}
-
-	/* need to allocate */
-	while((up = mallocz(sizeof(Uproc), 1)) == nil)
-		sleep(1000);
-
-	/* fprint(2, "alloc uproc for pid %d\n", pid); */
-	up->pid = pid;
-	lock(&uproclock);
-	h = pid%PIDHASH;
-	for(i=0; i<PIDHASH; i++){
-		if(alluproc[h]==T || alluproc[h]==nil){
-			alluproc[h] = up;
-			allupid[h] = pid;
-			unlock(&uproclock);
-			return up;
-		}
-		if(++h == PIDHASH)
-			h = 0;
-	}
-	unlock(&uproclock);
-
-	/* out of pids! */
-	sysfatal("too many processes in uproc table");
-	return nil;
-}
-
-void
-_p9uprocdie(void)
-{
-	Uproc *up;
-	int pid, i, h;
-
-	pid = getpid();
-	/* fprint(2, "reap uproc for pid %d\n", pid); */
-	h = pid%PIDHASH;
-	for(i=0; i<PIDHASH; i++){
-		up = alluproc[h];
-		if(up == nil)
-			break;
-		if(up == T)
-			continue;
-		if(allupid[h] == pid){
-			up = alluproc[h];
-			alluproc[h] = T;
-			free(up);
-			allupid[h] = 0;
-		}
-	}
-}
diff --git a/src/lib9/execl.c b/src/lib9/execl.c
new file mode 100644
index 00000000..988d2072
--- /dev/null
+++ b/src/lib9/execl.c
@@ -0,0 +1,29 @@
+#include <u.h>
+#include <libc.h>
+
+int
+execl(char *prog, ...)
+{
+	int i;
+	va_list arg;
+	char **argv;
+
+	va_start(arg, prog);
+	for(i=0; va_arg(arg, char*) != nil; i++)
+		;
+	va_end(arg);
+
+	argv = malloc((i+1)*sizeof(char*));
+	if(argv == nil)
+		return -1;
+
+	va_start(arg, prog);
+	for(i=0; (argv[i] = va_arg(arg, char*)) != nil; i++)
+		;
+	va_end(arg);
+
+	exec(prog, argv);
+	free(argv);
+	return -1;
+}
+
-- 
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