proj: Add server.c in perf

proj/perf/.gitignore

@@ -0,0 +1,6 @@
+main
+server
+*.csv
+*.txt
+*.log
+*.zip

proj/perf/Makefile

@@ -4,13 +4,16 @@ CFLAGS=-std=c99 -pedantic -Wall -D_DEFAULT_SOURCE -D_BSD_SOURCE -D_SVID_SOURCE -
 
 .PHONY: all clean
 all: default
-default: main
+default: main server
 
-main.o: main.c
+%.o: %.c
 	$(CC) -c -o $@ $^ $(CFLAGS)
 
 main: main.o
 	$(CC) -o $@ $^ $(CFLAGS) -lc
 
+server: server.o
+	$(CC) -o $@ $^ $(CFLAGS) -lc
+
 clean:
 	rm -rf main *.o

proj/perf/server.c

@@ -0,0 +1,66 @@
+
+#include <errno.h>
+#include <stdio.h>
+#include <string.h>
+#include <unistd.h>
+#include <sys/socket.h>
+#include <sys/un.h>
+#include <stdlib.h>
+
+int main(const int argc, const char *argv[]) {
+    if (argc != 3) {
+        fprintf(stderr, "usage: server <path> <mode>\n");
+        return 1;
+    }
+
+    const char *path = argv[1];
+    const char *mode = argv[2];
+
+    int fd;
+    if ((fd = socket(AF_UNIX, SOCK_STREAM, 0)) == -1) {
+        fprintf(stderr, "unable to create socket: %s\n", strerror(errno));
+        return 1;
+    }
+
+    struct sockaddr_un addr = {.sun_family = AF_UNIX};
+    strcpy(addr.sun_path, path);
+    if (bind(fd, (struct sockaddr *) &addr, sizeof(addr)) != 0) {
+        fprintf(stderr, "unable to bind socket: %s\n", strerror(errno));
+        close(fd);
+        return 1;
+    }
+
+    if (listen(fd, 4) != 0) {
+        fprintf(stderr, "unable to listen on socket: %s\n", strerror(errno));
+        close(fd);
+        return 1;
+    }
+
+    size_t len = 4096;
+    char *line = malloc(len);
+    while (1) {
+        int client_fd;
+        if ((client_fd = accept(fd, NULL, NULL)) == -1) {
+            fprintf(stderr, "unable to accept connection: %s\n", strerror(errno));
+            break;
+        }
+
+        FILE *client;
+        if ((client = fdopen(client_fd, "w+")) == NULL) {
+            fprintf(stderr, "unable open stream: %s\n", strerror(errno));
+            break;
+        }
+
+        int n = 0;
+        while (getline(&line, &len, client) > 0) {
+            if (n % 2 == 1) {
+                fprintf(client, "%s\n", mode);
+            }
+            n++;
+        }
+    }
+
+    free(line);
+    close(fd);
+    unlink(path);
+}

proj/perf/test.sh

@@ -14,9 +14,22 @@ function test() {
   done
 }
 
+rm /tmp/test.ok.sock /tmp/test.return.sock /tmp/intercept.performance.ok.sock /tmp/intercept.performance.return.sock
+./server /tmp/test.ok.sock 'ok' &
+./server /tmp/test.return.sock 'return 0' &
+
 test ./main
 cd ../intercept
 test ./intercept -o -i - -- ../perf/main
 test ./intercept -o -i stderr -- ../perf/main
 test ./intercept -o -i file:out.log -- ../perf/main
-#test ./intercept -o -i unix:/ -- ../perf/main
+
+cd ../server/src
+./performance -m ok &
+./performance -m return &
+cd ../../intercept
+sleep 1
+test ./intercept -o -i unix:/tmp/test.ok.sock -- ../perf/main
+test ./intercept -o -i unix:/tmp/test.return.sock -- ../perf/main
+test ./intercept -o -i unix:/tmp/intercept.performance.ok.sock -- ../perf/main
+test ./intercept -o -i unix:/tmp/intercept.performance.return.sock -- ../perf/main