add mflag

Makefile

@@ -1,6 +1,6 @@
 CFLAGS=-g -O1 -Wall -Wno-switch -Wextra -fstack-protector-strong -D_FORTIFY_SOURCE=2
 
-ALL = mscan mthread mhdr mshow mlist mseq msort mmime minc
+ALL = mscan mthread mhdr mshow mlist mseq msort mmime minc mflag
 
 all: $(ALL)
 
@@ -13,6 +13,7 @@ mseq: mseq.o seq.o
 msort: msort.o blaze822.o seq.o
 mmime: mmime.o
 minc: minc.o
+mflag: mflag.o blaze822.o seq.o
 
 clean: FRC
 	-rm -f $(ALL) *.o

mflag.c

@@ -0,0 +1,164 @@
+#include <sys/types.h>
+
+#include <dirent.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <limits.h>
+#include <search.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#include "blaze822.h"
+
+#define uc(c) ((c) & 0xdf)
+
+static int8_t flags[255];
+static int vflag = 0;
+
+char **args;
+ssize_t argsalloc = 256;
+int idx = 0;
+char *curfile;
+
+void
+add(char *file)
+{
+        if (idx >= argsalloc) {
+                argsalloc *= 2;
+                if (argsalloc < 0)
+                        exit(-1);
+                args = realloc(args, sizeof (char *) * argsalloc);
+        }
+        if (!args)
+                exit(-1);
+        args[idx] = strdup(file);
+        idx++;
+}
+
+void
+flag(char *file)
+{
+	int indent = 0;
+	while (file[indent] == ' ' || file[indent] == '\t')
+		indent++;
+
+	char *f = strstr(file, ":2,");
+	if (!f)
+		goto skip;
+
+	if (args) {
+		int i;
+		for (i = 0; i < idx; i++)
+			if (strcmp(file+indent, args[i]) == 0)
+				goto doit;
+		goto skip;
+	}
+
+doit:
+	;
+	int8_t myflags[255] = { 0 };
+	char *s;
+	for (s = f+3; *s; s++)
+		myflags[(unsigned int)*s] = 1;
+
+	int changed = 0;
+	unsigned int i;
+	for (i = 0; i < sizeof myflags; i++) {
+		int z = myflags[i];
+		myflags[i] += flags[i];
+		if ((z <= 0 && myflags[i] > 0) ||
+		    (z > 0 && myflags[i] <= 0))
+			changed = 1;
+	}
+	if (changed) {
+		char dst[PATH_MAX];
+		char *s = file;
+		char *t = dst;
+		while (s < f+3 && t < dst + sizeof dst - 1)
+			*t++ = *s++;
+		for (i = 0; i < sizeof myflags && t < dst + sizeof dst - 1; i++)
+			if (myflags[i] > 0)
+				*t++ = i;
+		*t = 0;
+
+		if (rename(file+indent, dst+indent) < 0) {
+			fprintf(stderr, "minc: can't rename '%s' to '%s': %s\n",
+			    file+indent, dst+indent, strerror(errno));
+			goto skip;
+		}
+
+		if (strcmp(file+indent, curfile) == 0)
+			blaze822_seq_setcur(dst+indent);
+
+		printf("%s\n", dst);
+
+		return;
+	}
+
+skip:
+	if (vflag)
+		printf("%s\n", file);
+}
+
+int
+main(int argc, char *argv[])
+{
+	int c;
+	while ((c = getopt(argc, argv, "PRSTDFprstdfX:x:v")) != -1)
+		switch(c) {
+		case 'P': case 'R': case 'S': case 'T': case 'D': case 'F':
+			flags[(unsigned int)c] = 1;
+			break;
+		case 'p': case 'r': case 's': case 't': case 'd': case 'f':
+			flags[(unsigned int)uc(c)] = -1;
+			break;
+                case 'X':
+			while (*optarg)
+				flags[(unsigned int)*optarg++] = 1;
+			break;
+                case 'x':
+			while (*optarg)
+				flags[(unsigned int)*optarg++] = -1;
+			break;
+		case 'v': vflag = 1; break;
+		default:
+			// XXX usage
+			exit(1);
+		}
+
+	curfile = blaze822_seq_cur();
+
+	if (vflag) {
+		args = calloc(sizeof (char *), argsalloc);
+		if (!args)
+			exit(-1);
+
+		if (argc == optind) {
+			char *cur[] = { "." };
+			blaze822_loop(1, cur, add);
+		} else {
+			blaze822_loop(argc-optind, argv+optind, add);
+		}
+
+		if (isatty(0)) {
+			char *all[] = { ":" };
+			blaze822_loop(1, all, flag);
+		} else {
+			blaze822_loop(0, 0, flag);
+		}
+
+		return 0;
+	}
+
+	if (argc == optind && isatty(0)) {
+		char *cur[] = { "." };
+		blaze822_loop(1, cur, flag);
+	} else {
+		blaze822_loop(argc-optind, argv+optind, flag);
+	}
+
+	return 0;
+}