template

commit b0e09ddca612774abe589daa1e6b6bc53b11386e
Author: thing1 <thing1@seacrossedlovers.xyz>
Date:   Fri, 22 Aug 2025 22:10:23 +0100

init commit

Diffstat:
A
.gitignore
 | 
1
+
A
Makefile
 | 
17
+++++++++++++++++
A
examples/example.html
 | 
1
+
A
examples/example.log
 | 
4
++++
A
examples/loggen.sh
 | 
7
+++++++
A
examples/template.c
 | 
0

A
template.c
 | 
80
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

7 files changed, 110 insertions(+), 0 deletions(-)
diff --git a/.gitignore b/.gitignore
@@ -0,0 +1 @@
+template
diff --git a/Makefile b/Makefile
@@ -0,0 +1,17 @@
+CFLAGS=-ggdb
+SRC=template.c
+DIR=/usr/local/bin
+
+all: template 
+
+template: ${SRC}
+	cc ${SRC} -o template ${CFLAGS}
+
+clean:
+	rm template
+
+install: template
+	cp template ${DIR}/
+
+uninstall: 
+	rm ${DIR}/template
diff --git a/examples/example.html b/examples/example.html
@@ -0,0 +1 @@
+<p>:DISPLAY:</p>
diff --git a/examples/example.log b/examples/example.log
@@ -0,0 +1,4 @@
+time: $time$ 
+name: $name$
+user: $user$
+dir: $dir$
diff --git a/examples/loggen.sh b/examples/loggen.sh
@@ -0,0 +1,7 @@
+#!/bin/sh
+export time=$(date)
+export name=$(uname -a)
+export user=$(whoami)
+export dir=$(pwd)
+
+template -d '$' example.log
diff --git a/examples/template.c b/examples/template.c
diff --git a/template.c b/template.c
@@ -0,0 +1,80 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+FILE *inin;
+
+static void *
+usage() {
+	fprintf(stderr, "template [-d delim] [-h] [file|-]\n");
+}
+
+static char *
+readto(FILE *f, char d) {
+	static char word[128];
+	char *w = word;
+	char c;
+	
+	while ((c = getc(f)) != EOF) {
+		if (c == d)
+			break;
+		*w = c;
+		w++;
+		if (w - word == 128) {
+			fprintf(stderr, "variable name too long\n");
+		       	exit(1);	
+		}
+	}
+	*w = 0;
+	return word;
+}
+
+int
+main(int argc, char **argv) {
+	int i;
+	char c, p, delim = ':';
+	char *last = argv[argc - 1];
+	char *varname, *var;
+
+	for (i = 1; i < argc; i++) {
+		if (argv[i][0] == '-' && argv[i][2] == 0) {
+			switch (argv[i][1]) {
+			case 'd':
+				i++;
+				delim = argv[i][0];
+				break;
+			case 'h':
+			default:
+				usage();
+				return 0;
+			}
+		} else {
+			if (strcmp(last, "-") == 0)
+				inin = stdin;
+			else {
+				inin = fopen(last, "r");
+				if (!inin)
+					perror("Couldn't open file");
+			}
+		}
+	}
+	if (!inin) 
+		inin = stdin;
+	
+	for (c = getc(inin); c != EOF; c = getc(inin)) {
+		if (c == delim && p != '\\') {
+			varname = readto(inin, delim);
+			if (var = getenv(varname))
+				printf("%s", var);
+			else {
+				fflush(stdout);
+				fprintf(stderr, "no var called %s\n", varname);
+				exit(1);
+			}
+		} else 
+			putchar(c);
+		p = c;
+	}
+
+	return 0;
+}