diff options
Diffstat (limited to 'usr.bin/mail/popen.c')
| -rw-r--r-- | usr.bin/mail/popen.c | 30 |
1 files changed, 20 insertions, 10 deletions
diff --git a/usr.bin/mail/popen.c b/usr.bin/mail/popen.c index d7e528e59cc..0d83687872b 100644 --- a/usr.bin/mail/popen.c +++ b/usr.bin/mail/popen.c @@ -1,4 +1,4 @@ -/* $OpenBSD: popen.c,v 1.14 1997/11/14 00:23:54 millert Exp $ */ +/* $OpenBSD: popen.c,v 1.15 1998/02/15 21:20:02 niklas Exp $ */ /* $NetBSD: popen.c,v 1.6 1997/05/13 06:48:42 mikel Exp $ */ /* @@ -38,7 +38,7 @@ #if 0 static char sccsid[] = "@(#)popen.c 8.1 (Berkeley) 6/6/93"; #else -static char rcsid[] = "$OpenBSD: popen.c,v 1.14 1997/11/14 00:23:54 millert Exp $"; +static char rcsid[] = "$OpenBSD: popen.c,v 1.15 1998/02/15 21:20:02 niklas Exp $"; #endif #endif /* not lint */ @@ -66,8 +66,8 @@ struct child { int status; struct child *link; }; -static struct child *child; -static struct child *findchild __P((int)); +static struct child *child, *child_freelist = NULL; +static struct child *findchild __P((int, int)); static void delchild __P((struct child *)); static int file_pid __P((FILE *)); static int handle_spool_locks __P((int)); @@ -311,8 +311,9 @@ wait_command(pid) } static struct child * -findchild(pid) +findchild(pid, dont_alloc) int pid; + int dont_alloc; { struct child **cpp; @@ -320,7 +321,13 @@ findchild(pid) cpp = &(*cpp)->link) ; if (*cpp == NULL) { - *cpp = (struct child *)malloc(sizeof(struct child)); + if (dont_alloc) + return(NULL); + if (child_freelist) { + *cpp = child_freelist; + child_freelist = (*cpp)->link; + } else + *cpp = (struct child *)malloc(sizeof(struct child)); (*cpp)->pid = pid; (*cpp)->done = (*cpp)->free = 0; (*cpp)->link = NULL; @@ -337,7 +344,8 @@ delchild(cp) for (cpp = &child; *cpp != cp; cpp = &(*cpp)->link) ; *cpp = cp->link; - (void)free(cp); + cp->link = child_freelist; + child_freelist = cp; } void @@ -351,7 +359,9 @@ sigchild(signo) while ((pid = waitpid((pid_t)-1, &status, WNOHANG)) > 0) { - cp = findchild(pid); + cp = findchild(pid, 1); + if (!cp) + continue; if (cp->free) delchild(cp); else { @@ -371,7 +381,7 @@ int wait_child(pid) int pid; { - struct child *cp = findchild(pid); + struct child *cp = findchild(pid, 0); sigset_t nset, oset; sigemptyset(&nset); @@ -393,7 +403,7 @@ void free_child(pid) int pid; { - struct child *cp = findchild(pid); + struct child *cp = findchild(pid, 0); sigset_t nset, oset; sigemptyset(&nset); |