setperm/GNUmakefile

@@ -0,0 +1,5 @@
+include GNUmakerules
+setperm:
+clean:
+	rm setperm
+install: $(BINDIR)/setperm

setperm/setperm.c

@@ -0,0 +1,80 @@
+#include <assert.h>
+#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/stat.h>
+#include <unistd.h>
+
+char *cmnd;
+
+void usage(void) {
+	fprintf(stderr, "Usage: %s -F protofile file ...\n", cmnd);
+	exit(1);
+}
+
+typedef struct {
+	uid_t user;
+	gid_t group;
+	mode_t mode;
+} perm_t;
+
+int getperm(const char *filename, perm_t *permp) {
+	struct stat sb;
+
+	if (stat(filename, &sb) == -1) return -1;
+	permp->user = sb.st_uid;
+	permp->group = sb.st_gid;
+	permp->mode = sb.st_mode;
+	return 0;
+}
+
+int setperm(const char *filename, perm_t perm) {
+	int rc = 0;
+	
+	if (chown(filename, perm.user, perm.group) == -1) {
+		fprintf (stderr, "%s: cannot change owner of `%s' to %ld:%ld: %s\n",
+			 cmnd, filename, (long)perm.user, (long)perm.group, strerror(errno));
+		rc = 1;
+	}
+	if (chmod(filename, perm.mode) == -1) {
+		fprintf (stderr, "%s: cannot change mode of %s to %lo: %s\n",
+			 cmnd, filename, (unsigned long)perm.mode, strerror(errno));
+		rc = 1;
+	}
+	return rc;
+}
+
+int main (int argc, char **argv) {
+	int c;
+	perm_t perm;
+	int i;
+
+	cmnd = argv[0];
+
+	while ((c = getopt(argc, argv, "o:g:m:F:R")) != EOF) {
+		switch (c) {
+		case 'o':
+		case 'p':
+		case 'm':
+		case 'R':
+			fprintf (stderr, "%s: option `%c' not yet implemented. Sorry\n", cmnd, c);
+			exit(1);
+		case 'F':
+			if (getperm (optarg, &perm) == -1) {
+				fprintf (stderr, "%s: cannot get permissions from %s: %s\n",
+					cmnd, optarg, strerror(errno));
+				exit(1);
+			}
+			break;
+		case '?':
+			usage ();
+		default: 
+			assert(0);
+		}
+	}
+	for (i = optind; i < argc; i ++) {
+		setperm(argv[i], perm);
+	}
+	return 0;
+}