libc: add procsetname()

sys/include/libc.h

@@ -489,6 +489,9 @@ extern	int	rwakeup(Rendez*);
 extern	int	rwakeupall(Rendez*);
 extern	void**	privalloc(void);
 
+extern void	procsetname(char*, ...);
+#pragma varargck argpos procsetname 1
+
 /*
  *  network dialing
  */

sys/src/cmd/aux/listen.c

@@ -53,31 +53,6 @@ usage(void)
 		" [-a addr] [proto]");
 }
 
-/*
- * based on libthread's threadsetname, but drags in less library code.
- * actually just sets the arguments displayed.
- */
-static void
-procsetname(char *fmt, ...)
-{
-	int fd;
-	char *cmdname;
-	char buf[128];
-	va_list arg;
-
-	va_start(arg, fmt);
-	cmdname = vsmprint(fmt, arg);
-	va_end(arg);
-	if (cmdname == nil)
-		return;
-	snprint(buf, sizeof buf, "#p/%d/args", getpid());
-	if((fd = open(buf, OWRITE)) >= 0){
-		write(fd, cmdname, strlen(cmdname)+1);
-		close(fd);
-	}
-	free(cmdname);
-}
-
 void
 main(int argc, char *argv[])
 {

sys/src/cmd/cpu.c

@@ -116,31 +116,6 @@ procgetname(void)
 	return strdup(lp+1);
 }
 
-/*
- * based on libthread's threadsetname, but drags in less library code.
- * actually just sets the arguments displayed.
- */
-void
-procsetname(char *fmt, ...)
-{
-	int fd;
-	char *cmdname;
-	char buf[128];
-	va_list arg;
-
-	va_start(arg, fmt);
-	cmdname = vsmprint(fmt, arg);
-	va_end(arg);
-	if (cmdname == nil)
-		return;
-	snprint(buf, sizeof buf, "#p/%d/args", getpid());
-	if((fd = open(buf, OWRITE)) >= 0){
-		write(fd, cmdname, strlen(cmdname)+1);
-		close(fd);
-	}
-	free(cmdname);
-}
-
 void
 main(int argc, char **argv)
 {

sys/src/cmd/cwfs/portfns.h

@@ -142,7 +142,6 @@ int	partwrite(Device*, Off, void*);
 void	prdate(void);
 void	preread(Device*, Off);
 int	prime(vlong);
-void	procsetname(char *fmt, ...);
 void	putbuf(Iobuf*);
 Off	qidpathgen(Device*);
 void*	querychanger(Device *);

sys/src/cmd/cwfs/proc.c

@@ -1,31 +1,6 @@
 #include "all.h"
 #include "io.h"
 
-/*
- * based on libthread's threadsetname, but drags in less library code.
- * actually just sets the arguments displayed.
- */
-void
-procsetname(char *fmt, ...)
-{
-	int fd;
-	char *cmdname;
-	char buf[128];
-	va_list arg;
-
-	va_start(arg, fmt);
-	cmdname = vsmprint(fmt, arg);
-	va_end(arg);
-	if (cmdname == nil)
-		return;
-	snprint(buf, sizeof buf, "#p/%d/args", getpid());
-	if((fd = open(buf, OWRITE)) >= 0){
-		write(fd, cmdname, strlen(cmdname)+1);
-		close(fd);
-	}
-	free(cmdname);
-}
-
 void
 newproc(void (*f)(void *), void *arg, char *text)
 {

sys/src/cmd/exportfs/exportsrv.c

@@ -437,31 +437,6 @@ Xwstat(Fsrpc *t)
 	putsbuf(t);
 }
 
-/*
- * based on libthread's threadsetname, but drags in less library code.
- * actually just sets the arguments displayed.
- */
-void
-procsetname(char *fmt, ...)
-{
-	int fd;
-	char *cmdname;
-	char buf[128];
-	va_list arg;
-
-	va_start(arg, fmt);
-	cmdname = vsmprint(fmt, arg);
-	va_end(arg);
-	if (cmdname == nil)
-		return;
-	snprint(buf, sizeof buf, "#p/%d/args", getpid());
-	if((fd = open(buf, OWRITE)) >= 0){
-		write(fd, cmdname, strlen(cmdname)+1);
-		close(fd);
-	}
-	free(cmdname);
-}
-
 void
 slave(Fsrpc *f)
 {

sys/src/cmd/import.c

@@ -37,31 +37,6 @@ int	filter(int, char *, char *);
 
 static void	mksecret(char *, uchar *);
 
-/*
- * based on libthread's threadsetname, but drags in less library code.
- * actually just sets the arguments displayed.
- */
-void
-procsetname(char *fmt, ...)
-{
-	int fd;
-	char *cmdname;
-	char buf[128];
-	va_list arg;
-
-	va_start(arg, fmt);
-	cmdname = vsmprint(fmt, arg);
-	va_end(arg);
-	if (cmdname == nil)
-		return;
-	snprint(buf, sizeof buf, "#p/%d/args", getpid());
-	if((fd = open(buf, OWRITE)) >= 0){
-		write(fd, cmdname, strlen(cmdname)+1);
-		close(fd);
-	}
-	free(cmdname);
-}
-
 void
 post(char *name, char *envname, int srvfd)
 {

sys/src/cmd/ip/6in4.c

@@ -284,31 +284,6 @@ main(int argc, char **argv)
 	exits(0);
 }
 
-/*
- * based on libthread's threadsetname, but drags in less library code.
- * actually just sets the arguments displayed.
- */
-void
-procsetname(char *fmt, ...)
-{
-	int fd;
-	char *cmdname;
-	char buf[128];
-	va_list arg;
-
-	va_start(arg, fmt);
-	cmdname = vsmprint(fmt, arg);
-	va_end(arg);
-	if (cmdname == nil)
-		return;
-	snprint(buf, sizeof buf, "#p/%d/args", getpid());
-	if((fd = open(buf, OWRITE)) >= 0){
-		write(fd, cmdname, strlen(cmdname)+1);
-		close(fd);
-	}
-	free(cmdname);
-}
-
 /*
  * encapsulate v6 packets from the packet interface in v4 ones
  * and send them into the tunnel.

sys/src/cmd/ip/ayiya.c

@@ -466,31 +466,6 @@ main(int argc, char **argv)
 	exits(0);
 }
 
-/*
- * based on libthread's threadsetname, but drags in less library code.
- * actually just sets the arguments displayed.
- */
-void
-procsetname(char *fmt, ...)
-{
-	int fd;
-	char *cmdname;
-	char buf[128];
-	va_list arg;
-
-	va_start(arg, fmt);
-	cmdname = vsmprint(fmt, arg);
-	va_end(arg);
-	if (cmdname == nil)
-		return;
-	snprint(buf, sizeof buf, "#p/%d/args", getpid());
-	if((fd = open(buf, OWRITE)) >= 0){
-		write(fd, cmdname, strlen(cmdname)+1);
-		close(fd);
-	}
-	free(cmdname);
-}
-
 static int alarmed;
 
 static void

sys/src/cmd/ip/ipconfig/ipconfig.h

@@ -121,7 +121,6 @@ void	adddefroute(uchar*, uchar*, uchar*, uchar*);
 void	removedefroute(uchar*, uchar*, uchar*, uchar*);
 
 long	jitter(void);
-void	procsetname(char *fmt, ...);
 void	catch(void*, char*);
 int	countaddrs(uchar *a, int len);
 void	addaddrs(uchar *to, int nto, uchar *from, int nfrom);

sys/src/cmd/ip/ipconfig/main.c

@@ -801,31 +801,6 @@ catch(void*, char *msg)
 	noted(NDFLT);
 }
 
-/*
- * based on libthread's threadsetname, but drags in less library code.
- * actually just sets the arguments displayed.
- */
-void
-procsetname(char *fmt, ...)
-{
-	int fd;
-	char *cmdname;
-	char buf[128];
-	va_list arg;
-
-	va_start(arg, fmt);
-	cmdname = vsmprint(fmt, arg);
-	va_end(arg);
-	if (cmdname == nil)
-		return;
-	snprint(buf, sizeof buf, "#p/%d/args", getpid());
-	if((fd = open(buf, OWRITE)) >= 0){
-		write(fd, cmdname, strlen(cmdname)+1);
-		close(fd);
-	}
-	free(cmdname);
-}
-
 /* return pseudo-random integer in range low...(hi-1) */
 ulong
 randint(ulong low, ulong hi)

sys/src/cmd/ip/tinc.c

@@ -175,15 +175,12 @@ void	deledge(Edge*);
 void	delsubnet(Snet*);
 void	netrecalc(void);
 
-void	procsetname(char *fmt, ...);
 int	consend(Conn *c, char *fmt, ...);
+#pragma varargck argpos consend 2
 void	routepkt(Host *s, uchar *p, int n);
 void	needkey(Host *from);
 void	clearkey(Host *from);
 
-#pragma varargck argpos procsetname 1
-#pragma varargck argpos consend 2
-
 void*
 emalloc(ulong len)
 {
@@ -211,23 +208,6 @@ estrdup(char *s)
 	return s;
 }
 
-void
-procsetname(char *fmt, ...)
-{
-	int fd, n;
-	char buf[128];
-	va_list arg;
-
-	snprint(buf, sizeof buf, "#p/%d/args", getpid());
-	if((fd = open(buf, OWRITE)) < 0)
-		return;
-	va_start(arg, fmt);
-	n = vsnprint(buf, sizeof buf, fmt, arg);
-	va_end(arg);
-	write(fd, buf, n+1);
-	close(fd);
-}
-
 char*
 fd2dir(int fd, char *dir, int len)
 {

sys/src/cmd/ndb/cs.c

@@ -201,31 +201,6 @@ usage(void)
 	exits("usage");
 }
 
-/*
- * based on libthread's threadsetname, but drags in less library code.
- * actually just sets the arguments displayed.
- */
-void
-procsetname(char *fmt, ...)
-{
-	int fd;
-	char *cmdname;
-	char buf[128];
-	va_list arg;
-
-	va_start(arg, fmt);
-	cmdname = vsmprint(fmt, arg);
-	va_end(arg);
-	if (cmdname == nil)
-		return;
-	snprint(buf, sizeof buf, "#p/%d/args", getpid());
-	if((fd = open(buf, OWRITE)) >= 0){
-		write(fd, cmdname, strlen(cmdname)+1);
-		close(fd);
-	}
-	free(cmdname);
-}
-
 void
 main(int argc, char *argv[])
 {

sys/src/cmd/ndb/dn.c

@@ -1466,31 +1466,6 @@ dnslog(char *fmt, ...)
 	syslog(0, logfile, dnserr);
 }
 
-/*
- * based on libthread's threadsetname, but drags in less library code.
- * actually just sets the arguments displayed.
- */
-void
-procsetname(char *fmt, ...)
-{
-	int fd;
-	char *cmdname;
-	char buf[128];
-	va_list arg;
-
-	va_start(arg, fmt);
-	cmdname = vsmprint(fmt, arg);
-	va_end(arg);
-	if (cmdname == nil)
-		return;
-	snprint(buf, sizeof buf, "#p/%d/args", getpid());
-	if((fd = open(buf, OWRITE)) >= 0){
-		write(fd, cmdname, strlen(cmdname)+1);
-		close(fd);
-	}
-	free(cmdname);
-}
-
 /*
  *  create a slave process to handle a request to avoid one request blocking
  *  another

sys/src/cmd/ndb/dns.h

@@ -508,7 +508,6 @@ char*	walkup(char*);
 RR*	getdnsservers(int);
 void	logreply(int, uchar*, DNSmsg*);
 void	logsend(int, int, uchar*, char*, char*, int);
-void	procsetname(char *fmt, ...);
 
 /* dnresolve.c */
 RR*	dnresolve(char*, int, int, Request*, RR**, int, int, int, int*);

sys/src/libc/9sys/mkfile

@@ -31,6 +31,7 @@ OFILES=\
 	nulldir.$O\
 	postnote.$O\
 	privalloc.$O\
+	procsetname.$O\
 	pushssl.$O\
 	pushtls.$O\
 	putenv.$O\

sys/src/libc/9sys/procsetname.c

@@ -0,0 +1,19 @@
+#include <u.h>
+#include <libc.h>
+
+void
+procsetname(char *fmt, ...)
+{
+	int fd, n;
+	char buf[128];
+	va_list arg;
+
+	snprint(buf, sizeof buf, "#p/%lud/args", (ulong)getpid());
+	if((fd = open(buf, OWRITE)) < 0)
+		return;
+	va_start(arg, fmt);
+	n = vsnprint(buf, sizeof buf, fmt, arg);
+	va_end(arg);
+	write(fd, buf, n+1);
+	close(fd);
+}