remove sfeed_tail and recently added security considerations

... both are out-of-scope for sfeed.

- sfeed_tail can be written as some simple customized awk script reading from a
  FIFO. The C version did not work well on FIFO's.
- Security considerations are mentioned in the official HTML spec and applies to
  all HTML and protocol handlers, so is out-of-scope.

1 files changed, 0 insertions, 185 deletions

diff --git a/sfeed_tail.c b/sfeed_tail.c
deleted file mode 100644
index d611cbc..0000000
--- a/sfeed_tail.c
+++ /dev/null
@@ -1,185 +0,0 @@
-#include <sys/stat.h>
-#include <sys/types.h>
-
-#include <ctype.h>
-#include <err.h>
-#include <locale.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <unistd.h>
-
-#include "tree.h"
-#include "util.h"
-
-static char *line;
-static size_t linesize;
-static int changed, firsttime = 1;
-static time_t comparetime;
-
-struct line {
-	char *id;
-	char *link;
-	char *title;
-	time_t timestamp;
-	RB_ENTRY(line) entry;
-};
-
-int
-linecmp(struct line *e1, struct line *e2)
-{
-	int r;
-
-	if ((r = strcmp(e1->id, e2->id)))
-		return r;
-	else if ((r = strcmp(e1->title, e2->title)))
-		return r;
-	return strcmp(e1->link, e2->link);
-}
-RB_HEAD(linetree, line) head = RB_INITIALIZER(&head);
-RB_GENERATE_STATIC(linetree, line, entry, linecmp)
-
-/* remove old entries from the tree that won't be shown anyway. */
-static void
-gc(void)
-{
-	struct line *l, *tmp;
-
-	RB_FOREACH_SAFE(l, linetree, &head, tmp) {
-		if (l->timestamp < comparetime) {
-			free(l->id);
-			free(l->link);
-			free(l->title);
-			RB_REMOVE(linetree, &head, l);
-			free(l);
-		}
-	}
-}
-
-static void
-printfeed(FILE *fp, const char *feedname)
-{
-	struct line *add, search;
-	char *fields[FieldLast];
-	ssize_t linelen;
-	time_t parsedtime;
-	struct tm *tm;
-
-	while ((linelen = getline(&line, &linesize, fp)) > 0) {
-		if (line[linelen - 1] == '\n')
-			line[--linelen] = '\0';
-
-		if (!parseline(line, fields))
-			break;
-		parsedtime = 0;
-		if (strtotime(fields[FieldUnixTimestamp], &parsedtime))
-			continue;
-		if (!(tm = localtime(&parsedtime)))
-			err(1, "localtime");
-
-		/* old news: skip */
-		if (parsedtime < comparetime)
-			continue;
-
-		search.id = fields[FieldId];
-		search.link = fields[FieldLink];
-		search.title = fields[FieldTitle];
-		search.timestamp = parsedtime;
-		if (RB_FIND(linetree, &head, &search))
-			continue;
-
-		changed = 1;
-
-		if (!(add = calloc(1, sizeof(*add))))
-			err(1, "calloc");
-		if (!(add->id = strdup(fields[FieldId])))
-			err(1, "strdup");
-		if (!(add->link = strdup(fields[FieldLink])))
-			err(1, "strdup");
-		if (!(add->title = strdup(fields[FieldTitle])))
-			err(1, "strdup");
-		add->timestamp = parsedtime;
-		RB_INSERT(linetree, &head, add);
-
-		if (feedname[0]) {
-			printutf8pad(stdout, feedname, 15, ' ');
-			fputs("  ", stdout);
-		}
-
-		fprintf(stdout, "%04d-%02d-%02d %02d:%02d  ",
-		        tm->tm_year + 1900, tm->tm_mon + 1, tm->tm_mday,
-		        tm->tm_hour, tm->tm_min);
-		printutf8pad(stdout, fields[FieldTitle], 70, ' ');
-		printf(" %s\n", fields[FieldLink]);
-	}
-}
-
-int
-main(int argc, char *argv[])
-{
-	struct stat *stfiles, st;
-	char *name;
-	FILE *fp;
-	int i, slept = 0;
-
-	if (pledge("stdio rpath", NULL) == -1)
-		err(1, "pledge");
-
-	if (argc <= 1) {
-		fprintf(stderr, "usage: %s <file>...\n", argv[0]);
-		return 1;
-	}
-
-	setlocale(LC_CTYPE, "");
-
-	if (!(stfiles = calloc(argc - 1, sizeof(*stfiles))))
-		err(1, "calloc");
-
-	while (1) {
-		changed = 0;
-
-		if ((comparetime = time(NULL)) == -1)
-			err(1, "time");
-		/* 1 day is old news */
-		comparetime -= 86400;
-
-		for (i = 1; i < argc; i++) {
-			if (!(fp = fopen(argv[i], "r"))) {
-				if (firsttime)
-					err(1, "fopen: %s", argv[i]);
-				/* don't report when the file is missing after the first run */
-				continue;
-			}
-			if (fstat(fileno(fp), &st) == -1) {
-				if (firsttime)
-					err(1, "fstat: %s", argv[i]);
-				warn("fstat: %s", argv[i]);
-				fclose(fp);
-				continue;
-			}
-
-			/* did the file change? by size or modification time */
-			if (stfiles[i - 1].st_size != st.st_size ||
-			    stfiles[i - 1].st_mtime != st.st_mtime) {
-				name = ((name = strrchr(argv[i], '/'))) ? name + 1 : argv[i];
-				printfeed(fp, name);
-				if (ferror(fp))
-					warn("ferror: %s", argv[i]);
-				memcpy(&stfiles[i - 1], &st, sizeof(st));
-			}
-
-			fclose(fp);
-		}
-
-		/* "garbage collect" on a change or every 5 minutes */
-		if (changed || slept > 300) {
-			gc();
-			changed = 0;
-			slept = 0;
-		}
-		sleep(10);
-		slept += 10;
-		firsttime = 0;
-	}
-	return 0;
-}