Added nextep database program.

diff --git a/nextep.c b/nextep.c
new file mode 100644 (file)
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:
+ */