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libthread: simplify threadsetname()

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- open /proc/n/args with OCEXEC flag
- reduce stack usage by using smaller buffer for path
- format pid as ulong
This commit is contained in:
cinap_lenrek 2020-12-07 14:27:46 +01:00
parent f1e15da8f5
commit 1e2657ee97
1 changed files with 3 additions and 3 deletions
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6
sys/src/libthread/id.c
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@ -59,7 +59,7 @@ void
threadsetname(char *fmt, ...)
{
int fd;
char buf[128];
char buf[32];
va_list arg;
Proc *p;
Thread *t;
@ -72,8 +72,8 @@ threadsetname(char *fmt, ...)
t->cmdname = vsmprint(fmt, arg);
va_end(arg);
if(t->cmdname && p->nthreads == 1){
snprint(buf, sizeof buf, "#p/%lud/args", _tos->pid); //getpid());
if((fd = open(buf, OWRITE)) >= 0){
snprint(buf, sizeof buf, "/proc/%lud/args", (ulong)getpid());
if((fd = open(buf, OWRITE|OCEXEC)) >= 0){
write(fd, t->cmdname, strlen(t->cmdname)+1);
close(fd);
}