6 #define DIRECTORY(s) ((s)->qid.type&QTDIR)
7 #define REGULAR_FILE(s) ((s)->type == 'M' && !DIRECTORY(s))
11 static char *tmp[] = {"/tmp/diff1", "/tmp/diff2"};
13 static char *progname;
14 static char usage[] = "diff [ -efmnbwr ] file1 ... file2\n";
19 while (whichtmp > 0) {
21 remove(tmp[whichtmp]);
44 panic(int status, char *fmt, ...)
50 fprint(2, "%s: ", progname);
60 catch(void *a, char *msg)
68 mkpathname(char *pathname, char *path, char *name)
70 if (strlen(path) + strlen(name) > MAXPATHLEN) {
71 panic(0, "pathname %s/%s too long\n", path, name);
74 sprint(pathname, "%s/%s", path, name);
79 mktmpfile(int input, Dir **sb)
87 fd = create(p, OWRITE, 0600);
89 panic(mflag ? 0: 2, "cannot create %s: %r\n", p);
92 while ((i = read(input, buf, sizeof(buf))) > 0) {
93 if ((i = write(fd, buf, i)) < 0)
99 panic(mflag ? 0: 2, "cannot read/write %s: %r\n", p);
106 statfile(char *file, Dir **sb)
113 if (strcmp(file, "-") || (dir = dirfstat(0)) == nil) {
114 panic(mflag ? 0: 2, "cannot stat %s: %r\n", file);
118 return mktmpfile(0, sb);
120 else if (!REGULAR_FILE(dir) && !DIRECTORY(dir)) {
122 if ((input = open(file, OREAD)) == -1) {
123 panic(mflag ? 0: 2, "cannot open %s: %r\n", file);
126 file = mktmpfile(input, sb);
135 diff(char *f, char *t, int level)
137 char *fp, *tp, *p, fb[MAXPATHLEN+1], tb[MAXPATHLEN+1];
140 if ((fp = statfile(f, &fsb)) == 0)
142 if ((tp = statfile(t, &tsb)) == 0){
146 if (DIRECTORY(fsb) && DIRECTORY(tsb)) {
147 if (rflag || level == 0)
148 diffdir(fp, tp, level);
150 Bprint(&stdout, "Common subdirectories: %s and %s\n",
153 else if (REGULAR_FILE(fsb) && REGULAR_FILE(tsb))
156 if (REGULAR_FILE(fsb)) {
157 if ((p = utfrrune(f, '/')) == 0)
161 if (mkpathname(tb, tp, p) == 0)
165 if ((p = utfrrune(t, '/')) == 0)
169 if (mkpathname(fb, fp, p) == 0)
178 main(int argc, char *argv[])
184 Binit(&stdout, 1, OWRITE);
186 while (--argc && (*++argv)[0] == '-' && (*argv)[1]) {
187 for (p = *argv+1; *p; p++) {
220 panic(2, usage, progname);
221 if ((tsb = dirstat(argv[argc-1])) == nil)
222 panic(2, "can't stat %s\n", argv[argc-1]);
225 panic(2, usage, progname);
229 if ((fsb = dirstat(argv[0])) == nil)
230 panic(2, "can't stat %s\n", argv[0]);
231 if (DIRECTORY(fsb) && DIRECTORY(tsb))
236 for (i = 0; i < argc-1; i++) {
237 diff(argv[i], argv[argc-1], 0);
244 static char noroom[] = "out of memory - try diff -h\n";
251 if ((p = malloc(n)) == 0)
257 erealloc(void *p, unsigned n)
261 if ((rp = realloc(p, n)) == 0)