source: trunk/minix/commands/simple/co.c@ 20

Last change on this file since 20 was 9, checked in by Mattia Monga, 14 years ago

Minix 3.1.2a
File size: 5.7 KB
Line 
1/* co - check out Author: Peter S. Housel 12/24/87 */
2
3#include <sys/types.h>
4#include <sys/stat.h>
5#include <string.h>
6#include <pwd.h>
7#include <stdlib.h>
8#include <unistd.h>
9#include <stdio.h>
10
11#define SUFFIX ",S" /* svc indicator */
12#define SVCDIR "SVC" /* svc postfix indicator */
13
14#define LINELEN 256 /* maximum line length */
15
16#ifdef MAXPATHLEN
17#define PATHLEN MAXPATHLEN
18#else
19#define PATHLEN 128 /* buffer length for filenames */
20#endif
21
22char file[PATHLEN]; /* file to be checked in */
23char svc[PATHLEN]; /* filename for svc file */
24char newsvc[PATHLEN]; /* new copy of SVC file */
25char line[LINELEN]; /* temporary line buffer */
26char *p; /* scratch character pointer */
27
28FILE *svcfp; /* svc file */
29int rev; /* old revision number */
30int lastrev, lockrev; /* latest file revision, lock into */
31int status; /* wait() buffer */
32int svclock; /* lock the SVC file */
33struct stat stb; /* stat() buffer */
34char *base; /* basename of file */
35
36char difftemp[PATHLEN]; /* extract() fix/patch input */
37
38_PROTOTYPE(int main, (int argc, char **argv));
39_PROTOTYPE(void fname, (char *src, char *dst));
40_PROTOTYPE(void svcname, (char *src, char *dst));
41_PROTOTYPE(void extract, (char *script, char *out, int rev));
42_PROTOTYPE(char *basename, (char *name));
43_PROTOTYPE(char *whoami, (void));
44_PROTOTYPE(int getyn, (void));
45
46int main(argc, argv)
47int argc;
48char **argv;
49{
50#ifdef perprintf
51 char errbuf[BUFSIZ];
52 setbuf(stderr, errbuf);
53 perprintf(stderr);
54#endif
55
56 while (++argv, --argc) {
57 if ('-' == (*argv)[0]) {
58 if ('r' == (*argv)[1]) {
59 --argc;
60 rev = atoi(*++argv);
61 if (rev < 1) {
62 fprintf(stderr, "Illegal revision number\n");
63 exit(1);
64 }
65 } else if ('l' == (*argv)[1])
66 ++svclock;
67 else {
68 fprintf(stderr, "co: illegal option -%c\n", (*argv)[1]);
69 exit(1);
70 }
71 } else
72 break;
73 }
74
75 if (1 != argc) {
76 fprintf(stderr, "co: bad number of files arguments\n");
77 exit(1);
78 }
79 fname(*argv, file);
80 svcname(file, svc);
81
82 fprintf(stderr, "%s -> %s\n", svc, base = basename(file));
83
84 if (NULL == (svcfp = fopen(svc, "r"))) {
85 perror("co: can't read SVC file");
86 exit(1);
87 }
88 if (1 != fscanf(svcfp, "# %d", &lastrev) || lastrev < 1) {
89 fprintf(stderr, "co: illegal SVC file format\n");
90 exit(1);
91 }
92 fclose(svcfp);
93
94 if (stat(base, &stb) >= 0 && (stb.st_mode & 0222)) {
95 fprintf(stderr, "Writable %s exists - overwrite (n/y)? ", base);
96 if (!getyn()) {
97 fprintf(stderr, "Checkout aborted\n");
98 exit(1);
99 }
100 }
101 if (strlen(base)) unlink(base);
102 if (0 == rev) rev = lastrev;
103 fprintf(stderr, "Checking out revision %d", rev);
104 extract(svc, base, rev);
105
106 if (svclock) {
107 lockrev = lastrev + 1;
108 fprintf(stderr, "; Locking into revision %d\n", lockrev);
109 if (stat(svc, &stb) < 0 || chmod(svc, stb.st_mode | 0200) < 0)
110 perror("co: can't chmod SVC file");
111
112 if (stat(base, &stb) < 0 || chmod(base, stb.st_mode | 0200) < 0)
113 perror("co: can't chmod source file");
114
115 if (NULL == (svcfp = fopen(svc, "a"))
116 || (fprintf(svcfp, "#***SVCLOCK*** %s %d\n", whoami(), lockrev), ferror(svcfp))) {
117 fprintf(stderr, "co: can't lock %s\n", svc);
118 exit(1);
119 }
120 if (stat(svc, &stb) < 0 || chmod(svc, stb.st_mode & 0555))
121 perror("co: can't chmod SVC file");
122 } else {
123 putchar('\n');
124 if (stat(base, &stb) < 0 || chmod(base, stb.st_mode & 0555))
125 perror("co: can't chmod source file");
126 }
127
128 return(0);
129}
130
131
132void fname(src, dst)
133char *src, *dst;
134{
135 char *p;
136 strcpy(dst, src);
137 p = &dst[strlen(src) - strlen(SUFFIX)];
138 if (!strcmp(p, SUFFIX)) *p = '\0';
139}
140
141void svcname(src, dst)
142char *src, *dst;
143{
144 char *p;
145
146 strcpy(dst, src);
147 strcat(dst, SUFFIX);
148
149 if (0 != access(dst, 4)) {
150 char dirname[PATHLEN];
151 if (NULL != (p = strrchr(src, '/')))
152 strncpy(dirname, src, (size_t)(p - src) + 1);
153 else
154 dirname[0] = '\0';
155 strcat(dirname, SVCDIR);
156
157 if (0 == access(dirname, 1)) {
158 strcpy(dst, dirname);
159 if (NULL == p) {
160 strcat(dst, "/");
161 strcat(dst, src);
162 } else
163 strcat(dst, p);
164 strcat(dst, SUFFIX);
165 }
166 }
167}
168
169void extract(script, out, rev)
170char *script, *out;
171int rev;
172{
173 FILE *outfp;
174 int testrev;
175 char buf[80];
176
177 sprintf(difftemp, "Fix.%s", out);
178
179 svcfp = fopen(script, "r");
180 fgets(line, LINELEN, svcfp); /* skip '# rev' line */
181 fgets(line, LINELEN, svcfp); /* skip 'cat <***MAIN-eof***' line */
182
183 if (NULL == (outfp = fopen(out, "w"))) {
184 perror("co: can't create output file");
185 return;
186 }
187 while (NULL != fgets(line, LINELEN, svcfp) &&
188 strcmp(line, "***MAIN-eof***\n"))
189 fputs(line, outfp);
190
191 fclose(outfp);
192
193 while (NULL != fgets(line, LINELEN, svcfp)) {
194 if (!strncmp(line, "if ", (size_t)3)) {
195 sscanf(line, "if test $2 -ge %d", &testrev);
196 if (rev >= testrev) {
197 unlink(difftemp);
198 return;
199 }
200 if (NULL == (outfp = fopen(difftemp, "w"))) {
201 perror("co: can't create output file");
202 return;
203 }
204 sprintf(buf, "***%d-eof***\n", testrev);
205 while (NULL != fgets(line, LINELEN, svcfp) &&
206 strcmp(line, buf))
207 fputs(line, outfp);
208 fclose(outfp);
209 } else if (!strncmp(line, "mv ", (size_t)3)) {
210 sprintf(buf, "mv Fix.%s %s", out, out);
211 system(buf);
212 } else if (!strncmp(line, "fix ", (size_t)4)) {
213 sprintf(buf, "fix %s Fix.%s > New.%s; mv New.%s %s", out, out, out, out, out);
214 system(buf);
215 } else if (!strncmp(line, "patch ", (size_t)6)) {
216 sprintf(buf, "patch -n -s %s < Fix.%s; rm -f %s.orig", out, out, out);
217 system(buf);
218 } else { /* ignore */
219 }
220 }
221
222 unlink(difftemp);
223 return;
224}
225
226char *basename(name)
227char *name;
228{
229 char *p;
230
231 if (NULL == (p = strrchr(name, '/')))
232 return name;
233 else
234 return p + 1;
235}
236
237char *whoami()
238{
239 struct passwd *pw;
240
241 if (NULL != (pw = getpwuid(getuid())))
242 return pw->pw_name;
243 else
244 return "nobody";
245}
246
247int getyn()
248{
249 char ans[10];
250
251 return(NULL != fgets(ans, 10, stdin)) && ('y' == ans[0] || 'Y' == ans[0]);
252}
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