1 #include	"mk.h"
2 #define	ARMAG	"!<arch>\n"
3 #define	SARMAG	8
4 
5 #define	ARFMAG	"`\n"
6 #define SARNAME	16
7 
8 struct	ar_hdr
9 {
10 	char	name[SARNAME];
11 	char	date[12];
12 	char	uid[6];
13 	char	gid[6];
14 	char	mode[8];
15 	char	size[10];
16 	char	fmag[2];
17 };
18 #define	SAR_HDR	(SARNAME+44)
19 
20 static int dolong;
21 
22 static void atimes(char *);
23 static char *split(char*, char**);
24 
25 long
26 atimeof(int force, char *name)
27 {
28 	Symtab *sym;
29 	long t;
30 	char *archive, *member, buf[512];
31 
32 	archive = split(name, &member);
33 	if(archive == 0)
34 		Exit();
35 
36 	t = mtime(archive);
37 	sym = symlook(archive, S_AGG, 0);
38 	if(sym){
39 		if(force || (t > (long)sym->value)){
40 			atimes(archive);
41 			sym->value = (void *)t;
42 		}
43 	}
44 	else{
45 		atimes(archive);
46 		/* mark the aggegate as having been done */
47 		symlook(strdup(archive), S_AGG, "")->value = (void *)t;
48 	}
49 		/* truncate long member name to sizeof of name field in archive header */
50 	if(dolong)
51 		snprint(buf, sizeof(buf), "%s(%s)", archive, member);
52 	else
53 		snprint(buf, sizeof(buf), "%s(%.*s)", archive, SARNAME, member);
54 	sym = symlook(buf, S_TIME, 0);
55 	if (sym)
56 		return (long)sym->value;	/* uggh */
57 	return 0;
58 }
59 
60 void
61 atouch(char *name)
62 {
63 	char *archive, *member;
64 	int fd, i;
65 	struct ar_hdr h;
66 	long t;
67 
68 	archive = split(name, &member);
69 	if(archive == 0)
70 		Exit();
71 
72 	fd = open(archive, ORDWR);
73 	if(fd < 0){
74 		fd = create(archive, OWRITE, 0666);
75 		if(fd < 0){
76 			fprint(2, "create %s: %r\n", archive);
77 			Exit();
78 		}
79 		write(fd, ARMAG, SARMAG);
80 	}
81 	if(symlook(name, S_TIME, 0)){
82 		/* hoon off and change it in situ */
83 		LSEEK(fd, SARMAG, 0);
84 		while(read(fd, (char *)&h, sizeof(h)) == sizeof(h)){
85 			for(i = SARNAME-1; i > 0 && h.name[i] == ' '; i--)
86 					;
87 			h.name[i+1]=0;
88 			if(strcmp(member, h.name) == 0){
89 				t = SARNAME-sizeof(h);	/* ughgghh */
90 				LSEEK(fd, t, 1);
91 				fprint(fd, "%-12ld", time(0));
92 				break;
93 			}
94 			t = atol(h.size);
95 			if(t&01) t++;
96 			LSEEK(fd, t, 1);
97 		}
98 	}
99 	close(fd);
100 }
101 
102 static void
103 atimes(char *ar)
104 {
105 	struct ar_hdr h;
106 	long t;
107 	int fd, i;
108 	char buf[BIGBLOCK];
109 	char name[sizeof(h.name)+1];
110 
111 	fd = open(ar, OREAD);
112 	if(fd < 0)
113 		return;
114 
115 	if(read(fd, buf, SARMAG) != SARMAG){
116 		close(fd);
117 		return;
118 	}
119 	while(read(fd, (char *)&h, sizeof(h)) == sizeof(h)){
120 		t = atol(h.date);
121 		if(t == 0)	/* as it sometimes happens; thanks ken */
122 			t = 1;
123 		strncpy(name, h.name, sizeof(h.name));
124 		for(i = sizeof(h.name)-1; i > 0 && name[i] == ' '; i--)
125 				;
126 		if(name[i] == '/')		/* system V bug */
127 			i--;
128 		name[i+1]=0;
129 		sprint(buf, "%s(%s)", ar, h.size);
130 		symlook(strdup(buf), S_TIME, (void *)t)->value = (void *)t;
131 		t = atol(h.size);
132 		if(t&01) t++;
133 		LSEEK(fd, t, 1);
134 	}
135 	close(fd);
136 }
137 
138 static int
139 type(char *file)
140 {
141 	int fd;
142 	char buf[SARMAG];
143 
144 	fd = open(file, OREAD);
145 	if(fd < 0){
146 		if(symlook(file, S_BITCH, 0) == 0){
147 			Bprint(&bout, "%s doesn't exist: assuming it will be an archive\n", file);
148 			symlook(file, S_BITCH, (void *)file);
149 		}
150 		return 1;
151 	}
152 	if(read(fd, buf, SARMAG) != SARMAG){
153 		close(fd);
154 		return 0;
155 	}
156 	close(fd);
157 	return !strncmp(ARMAG, buf, SARMAG);
158 }
159 
160 static char*
161 split(char *name, char **member)
162 {
163 	char *p, *q;
164 
165 	p = strdup(name);
166 	q = utfrune(p, '(');
167 	if(q){
168 		*q++ = 0;
169 		if(member)
170 			*member = q;
171 		q = utfrune(q, ')');
172 		if (q)
173 			*q = 0;
174 		if(type(p))
175 			return p;
176 		free(p);
177 		fprint(2, "mk: '%s' is not an archive\n", name);
178 	}
179 	return 0;
180 }