Import sources from 2011-03-30 iso image

1 files changed, 166 insertions, 0 deletions

diff --git a/sys/src/cmd/mk/archive.c b/sys/src/cmd/mk/archive.c
new file mode 100755
index 000000000..70f7cc888
--- /dev/null
+++ b/sys/src/cmd/mk/archive.c
@@ -0,0 +1,166 @@
+#include	"mk.h"
+#include	<ar.h>
+
+static void atimes(char *);
+static char *split(char*, char**);
+
+long
+atimeof(int force, char *name)
+{
+	Symtab *sym;
+	long t;
+	char *archive, *member, buf[512];
+
+	archive = split(name, &member);
+	if(archive == 0)
+		Exit();
+
+	t = mtime(archive);
+	sym = symlook(archive, S_AGG, 0);
+	if(sym){
+		if(force || t > sym->u.value){
+			atimes(archive);
+			sym->u.value = t;
+		}
+	}
+	else{
+		atimes(archive);
+		/* mark the aggegate as having been done */
+		symlook(strdup(archive), S_AGG, "")->u.value = t;
+	}
+		/* truncate long member name to sizeof of name field in archive header */
+	snprint(buf, sizeof(buf), "%s(%.*s)", archive, utfnlen(member, SARNAME), member);
+	sym = symlook(buf, S_TIME, 0);
+	if (sym)
+		return sym->u.value;
+	return 0;
+}
+
+void
+atouch(char *name)
+{
+	char *archive, *member;
+	int fd, i;
+	struct ar_hdr h;
+	long t;
+
+	archive = split(name, &member);
+	if(archive == 0)
+		Exit();
+
+	fd = open(archive, ORDWR);
+	if(fd < 0){
+		fd = create(archive, OWRITE, 0666);
+		if(fd < 0){
+			perror(archive);
+			Exit();
+		}
+		write(fd, ARMAG, SARMAG);
+	}
+	if(symlook(name, S_TIME, 0)){
+		/* hoon off and change it in situ */
+		LSEEK(fd, SARMAG, 0);
+		while(read(fd, (char *)&h, sizeof(h)) == sizeof(h)){
+			for(i = SARNAME-1; i > 0 && h.name[i] == ' '; i--)
+					;
+			h.name[i+1]=0;
+			if(strcmp(member, h.name) == 0){
+				t = SARNAME-sizeof(h);	/* ughgghh */
+				LSEEK(fd, t, 1);
+				fprint(fd, "%-12ld", time(0));
+				break;
+			}
+			t = atol(h.size);
+			if(t&01) t++;
+			LSEEK(fd, t, 1);
+		}
+	}
+	close(fd);
+}
+
+static void
+atimes(char *ar)
+{
+	struct ar_hdr h;
+	long at, t;
+	int fd, i;
+	char buf[BIGBLOCK];
+	Dir *d;
+	
+	fd = open(ar, OREAD);
+	if(fd < 0)
+		return;
+
+	if(read(fd, buf, SARMAG) != SARMAG){
+		close(fd);
+		return;
+	}
+	if((d = dirfstat(fd)) == nil){
+		close(fd);
+		return;
+	}
+	at = d->mtime;
+	free(d);
+	while(read(fd, (char *)&h, sizeof(h)) == sizeof(h)){
+		t = atol(h.date);
+		if(t >= at)	/* new things in old archives confuses mk */
+			t = at-1;
+		if(t <= 0)	/* as it sometimes happens; thanks ken */
+			t = 1;
+		for(i = sizeof(h.name)-1; i > 0 && h.name[i] == ' '; i--)
+			;
+		if(h.name[i] == '/')		/* system V bug */
+			i--;
+		h.name[i+1]=0;		/* can stomp on date field */
+		snprint(buf, sizeof buf, "%s(%s)", ar, h.name);
+		symlook(strdup(buf), S_TIME, (void*)t)->u.value = t;
+		t = atol(h.size);
+		if(t&01) t++;
+		LSEEK(fd, t, 1);
+	}
+	close(fd);
+}
+
+static int
+type(char *file)
+{
+	int fd;
+	char buf[SARMAG];
+
+	fd = open(file, OREAD);
+	if(fd < 0){
+		if(symlook(file, S_BITCH, 0) == 0){
+			Bprint(&bout, "%s doesn't exist: assuming it will be an archive\n", file);
+			symlook(file, S_BITCH, (void *)file);
+		}
+		return 1;
+	}
+	if(read(fd, buf, SARMAG) != SARMAG){
+		close(fd);
+		return 0;
+	}
+	close(fd);
+	return !strncmp(ARMAG, buf, SARMAG);
+}
+
+static char*
+split(char *name, char **member)
+{
+	char *p, *q;
+
+	p = strdup(name);
+	q = utfrune(p, '(');
+	if(q){
+		*q++ = 0;
+		if(member)
+			*member = q;
+		q = utfrune(q, ')');
+		if (q)
+			*q = 0;
+		if(type(p))
+			return p;
+		free(p);
+		fprint(2, "mk: '%s' is not an archive\n", name);
+	}
+	return 0;
+}