commit e12cce345b82bdc57f02410d6bd19e0bb3f748f9
Author: Markus Hanetzok <markus@hanetzok.net>
Date: Fri, 7 Nov 2025 00:09:45 +0100
initial commit
Diffstat:
| A | .gitignore | | | 3 | +++ |
| A | Makefile | | | 29 | +++++++++++++++++++++++++++++ |
| A | README | | | 17 | +++++++++++++++++ |
| A | coma.c | | | 82 | +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
4 files changed, 131 insertions(+), 0 deletions(-)
diff --git a/.gitignore b/.gitignore
@@ -0,0 +1,3 @@
+coma
+*.o
+testfiles/
diff --git a/Makefile b/Makefile
@@ -0,0 +1,29 @@
+VERSION ?= 0.1
+
+CC = gcc
+CFLAGS = -Wall -Wextra -Wpedantic -O2 -std=c11 -DVERSION=\"$(VERSION)\"
+LDFLAGS = -lcjson
+
+PREFIX ?= /usr/local
+BINDIR = $(PREFIX)/bin
+
+SRC = coma.c
+OBJ = $(SRC:.c=.o)
+
+all: coma
+
+coma: $(OBJ)
+ $(CC) $(CFLAGS) -o $@ $^ $(LDFLAGS)
+
+%.o: %.c
+ $(CC) $(CFLAGS) -c $< -o $@
+
+install: coma
+ mkdir -p $(BINDIR)
+ cp coma $(BINDIR)/coma
+
+uninstall:
+ rm -f $(BINDIR)/coma
+
+clean:
+ rm -f coma $(OBJ)
diff --git a/README b/README
@@ -0,0 +1,17 @@
+coma - config manipulator
+=========================
+Create config files from JSON input.
+
+
+Dependencies
+------------
+coma depends on libcjson.
+
+
+Usage
+-----
+coma works for simple config files that use the <key> = <value> schema.
+
+coma reads from stdin. If no output filename is provided via the -o flag,
+new files will be written to /tmp/coma.txt by default, overwriting
+previously created files.
diff --git a/coma.c b/coma.c
@@ -0,0 +1,82 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <cjson/cJSON.h>
+
+#define BUFFSIZE 2048
+
+#define VERSION "0.1"
+#define OK 0
+#define INVALIDUSE 1
+#define TOOLONG 2
+#define PARSEFAIL 3
+
+typedef struct JSONProperty {
+ char *key;
+ char *value;
+} jprop;
+
+void die(char *msg, int rc) {
+ printf("%s\n", msg);
+ exit(rc);
+}
+
+int main (int argc, char *argv[]) {
+ int i;
+ for (i = 1; i < argc; i++) {
+ if (!strcmp(argv[i], "-v"))
+ die("coma-"VERSION, OK);
+ if (!strcmp(argv[i], "-h"))
+ die("usage: coma [-hv]", INVALIDUSE);
+ }
+
+ char *input = malloc(sizeof(char) * BUFFSIZE);
+ size_t inputsize = fread(input, sizeof(char), BUFFSIZE, stdin);
+ cJSON *json = cJSON_Parse(input);
+ if (json == NULL) {
+ const char *error_ptr = cJSON_GetErrorPtr();
+ cJSON_Delete(json);
+ if (error_ptr != NULL)
+ printf("%s\n", error_ptr);
+ die("Thou shall not parse\n", PARSEFAIL);
+ }
+ free(input);
+
+ cJSON *node;
+ char *output = malloc(sizeof(char) * inputsize);
+ for (node = json->child; node != NULL; node = node->next) {
+ char *key = node->string;
+ cJSON *item = cJSON_GetObjectItemCaseSensitive(json, key);
+ if (cJSON_IsString(item) && (item->valuestring != NULL)) {
+ strcat(output, key);
+ strcat(output, "=");
+ strcat(output, item->valuestring);
+ strcat(output, "\n");
+ }
+ if (cJSON_IsNumber(item) && (item->valuedouble != 0)) {
+ char numstr[64];
+ snprintf(numstr, 64, "%f", item->valuedouble);
+ strcat(output, key);
+ strcat(output, "=");
+ strcat(output, numstr);
+ strcat(output, "\n");
+ }
+ if (cJSON_IsTrue(item)) {
+ strcat(output, key);
+ strcat(output, "=true");
+ strcat(output, "\n");
+ }
+ if (cJSON_IsFalse(item)) {
+ strcat(output, key);
+ strcat(output, "=false");
+ strcat(output, "\n");
+ }
+ }
+
+ cJSON_Delete(json);
+ printf("%s\n", output);
+ free(output);
+
+ return OK;
+}
+
