From: Fredrik Tolf <fredrik@dolda2000.com>
Date: Sun, 5 Jun 2011 04:34:00 +0000 (+0200)
Subject: Added nextep database program.
X-Git-Url: http://dolda2000.com/gitweb/?p=utils.git;a=commitdiff_plain;h=b2fa28e3cc2ebdf6f144716f5764fe6c87ca8a2f

Added nextep database program.
---

diff --git a/nextep.c b/nextep.c
new file mode 100644
index 0000000..a7bc746
--- /dev/null
+++ b/nextep.c
@@ -0,0 +1,96 @@
+#include <stdlib.h>
+#include <stdio.h>
+#include <unistd.h>
+#include <string.h>
+#include <libgen.h>
+#include <errno.h>
+#include <sys/stat.h>
+
+static void usage(FILE *out)
+{
+    fprintf(out, "usage: nextep [-h] [-f FILE] [-s SET-VALUE] [DIR]\n");
+}
+
+int main(int argc, char **argv)
+{
+    int c;
+    char buf[1024], dbuf[1024], *p;
+    char *file, *value, *dir;
+    char base[1024], fpath[1024];
+    FILE *fp;
+    
+    file = "nextep";
+    value = NULL;
+    while((c = getopt(argc, argv, "hf:s:")) >= 0) {
+	switch(c) {
+	case 'f':
+	    file = optarg;
+	    break;
+	case 's':
+	    value = optarg;
+	    break;
+	case 'h':
+	    usage(stdout);
+	    exit(0);
+	default:
+	    usage(stderr);
+	    exit(1);
+	}
+    }
+    if(optind < argc) {
+	if(chdir(argv[optind])) {
+	    fprintf(stderr, "nextep: %s: %s\n", argv[optind], strerror(errno));
+	    exit(1);
+	}
+	optind++;
+    }
+    if(!getcwd(dbuf, sizeof(dbuf))) {
+	fprintf(stderr, "nextep: getcwd: %s\n", strerror(errno));
+	exit(1);
+    }
+    dir = basename(dbuf);
+    if((p = getenv("HOME")) == NULL) {
+	fprintf(stderr, "nextep: $HOME is not set\n");
+	exit(1);
+    }
+    snprintf(buf, sizeof(buf), "%s/.nextep", p);
+    snprintf(base, sizeof(base), "%s/%s", buf, dir);
+    if(access(base, X_OK)) {
+	if((mkdir(buf, 0777) && (errno != EEXIST)) || mkdir(base, 0777)) {
+	    fprintf(stderr, "nextep: %s: %s\n", base, strerror(errno));
+	    exit(1);
+	}
+    }
+    snprintf(fpath, sizeof(fpath), "%s/%s", base, file);
+    if(value == NULL) {
+	if((fp = fopen(fpath, "r")) == NULL) {
+	    if(errno != ENOENT) {
+		fprintf(stderr, "nextep: %s: %s\n", fpath, strerror(errno));
+		exit(1);
+	    }
+	} else {
+	    while(fgets(buf, sizeof(buf), fp) != NULL)
+		printf(buf);
+	    fclose(fp);
+	}
+    } else if(!*value) {
+	if(unlink(fpath) && (errno != ENOENT)) {
+	    fprintf(stderr, "nextep: %s: %s\n", fpath, strerror(errno));
+	    exit(1);
+	}
+    } else {
+	if((fp = fopen(fpath, "w")) == NULL) {
+	    fprintf(stderr, "nextep: %s: %s\n", fpath, strerror(errno));
+	    exit(1);
+	}
+	fprintf(fp, "%s\n", value);
+	fclose(fp);
+    }
+    return(0);
+}
+
+/*
+ * Local Variables:
+ * compile-command: "gcc -Wall -g -o nextep nextep.c"
+ * End:
+ */