Implement nopen(1)

1 files changed, 95 insertions, 0 deletions

diff --git a/nopen.c b/nopen.c
new file mode 100644
index 0000000..da5769a
--- /dev/null
+++ b/nopen.c
@@ -0,0 +1,95 @@
+/* See LICENSE file for copyright and license details. */
+#include <sys/types.h>
+#include <sys/wait.h>
+
+#include <err.h>
+#include <regex.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#include "util.h"
+
+struct assoc {
+	char *regex; /* Regex to match on filename */
+	char *file;
+	char *argv[NR_ARGS];
+	regex_t regcomp;
+};
+
+#include "nopenconf.h"
+
+void
+spawnassoc(struct assoc *assoc, char *arg)
+{
+	char *argv[NR_ARGS];
+	int i;
+
+	for (i = 0; assoc->argv[i]; i++) {
+		if (strcmp(assoc->argv[i], "{}") == 0) {
+			argv[i] = arg;
+			continue;
+		}
+		argv[i] = assoc->argv[i];
+	}
+	argv[i] = NULL;
+	spawnvp(NULL, assoc->file, argv);
+}
+
+struct assoc *
+openwith(char *file)
+{
+	int i;
+
+	for (i = 0; i < LEN(assocs); i++) {
+		if (regexec(&assocs[i].regcomp, file, 0, NULL, 0) == 0)
+			return &assocs[i];
+	}
+
+	return NULL;
+}
+
+void
+initassocs(void)
+{
+	char errbuf[256];
+	int i, r;
+
+	for (i = 0; i < LEN(assocs); i++) {
+		r = regcomp(&assocs[i].regcomp, assocs[i].regex,
+			    REG_NOSUB | REG_EXTENDED | REG_ICASE);
+		if (r != 0) {
+			regerror(r, &assocs[i].regcomp, errbuf, sizeof(errbuf));
+			fprintf(stderr, "invalid regex assocs[%d]: %s: %s\n",
+			        i, assocs[i].regex, errbuf);
+			exit(1);
+		}
+	}
+}
+
+void
+usage(char *argv0)
+{
+	fprintf(stderr, "usage: %s file...\n", argv0);
+	exit(1);
+}
+
+int
+main(int argc, char *argv[])
+{
+	if (argc == 1)
+		usage(argv[0]);
+	argc--;
+	argv++;
+	initassocs();
+	for (; *argv != NULL; argv++) {
+		struct assoc *assoc;
+
+		assoc = openwith(argv[0]);
+		if (assoc == NULL)
+			continue;
+		spawnassoc(assoc, argv[0]);
+	}
+	return 0;
+}