.

fetcher/spawnchild.c

@@ -0,0 +1,41 @@
+#include <unistd.h>
+#include <sys/types.h>
+#include <errno.h>
+#include <libowfat/errmsg.h>
+#include <libowfat/buffer.h>
+
+static void carpsysargs(char *args[])
+{
+  buffer_puts(buffer_2, "failed to exec");
+  while (*args) {
+    buffer_puts(buffer_2, " \'");
+    buffer_puts(buffer_2, *args);
+    buffer_puts(buffer_2, "'");
+    args++;
+  }
+  buffer_puts(buffer_2, ": ");
+  buffer_puts(buffer_2, strerror(errno));
+  buffer_puts(buffer_2, "\n");
+  buffer_flush(buffer_2);
+}
+
+pid_t spawnchild(char *args[], int infd, int outfd, int errfd)
+{
+  pid_t pid = fork();
+  switch (pid) {
+    case -1: carpsys("fork: "); return -1;
+  case 0:
+    // TODO pipe
+    if (dup2(1, outfd)<0
+     || dup2(2, errfd)<0
+    ) {
+      carpsys("dup2");
+      return -1;
+    }
+    execvp(args[0], args);
+    carpsysargs(args);
+    return -1;
+  default:
+    return pid;
+  }
+}