Adding lam_few(), A function which forks, exec's and waits

This commit was SVN r223.

src/lam/util/Makefile.am

@@ -11,6 +11,7 @@ noinst_LTLIBRARIES = libutil.la
 
 headers = \
     argv.h \
+    few.h \
     lam_log.h \
     malloc.h \
     path.h \
@@ -20,6 +21,7 @@ headers = \
 libutil_la_SOURCES = \
     $(headers) \
     argv.c \
+    few.c \
     lam_log.c \
     path.c \
     reactor.c \

src/lam/util/few.c

@@ -0,0 +1,45 @@
+/* 
+ * $HEADER$
+ */
+
+#include <stdio.h>
+#include <errno.h>
+#include <sys/wait.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+#include "lam_config.h"
+#include "lam/util/few.h"
+
+/** @file **/
+
+/**
+ *  forks, execs and waits for a subordinate program
+ *
+ *  @param argv Argument vector, argv[0] is the program
+ *  @retval Status code or ERROR
+ *  Returns:    - status code or ERROR
+ */
+int
+lam_few(char *argv[])
+{
+    int status;
+    int pid;
+    int ret;
+
+    if ((pid = fork()) < 0) {
+        return(pid);
+        }
+    /* child */
+    else if (0 == pid) {    
+        execvp(argv[0], argv);
+        exit(errno);
+        }
+    /* parent */
+    else {  
+        while ((0 != waitpid(pid, &status, 0)) &&
+                (! WIFEXITED(status)) && (EINTR == errno));
+    }
+    
+    return status;
+}

src/lam/util/few.h

@@ -0,0 +1,10 @@
+/*
+ * $HEADER$
+ */
+
+#ifndef LAM_FEW_H
+#define LAM_FEW_H
+
+int lam_few (char *argv[]);
+
+#endif /* LAM_FEW_H */