dirs_links/list_files.c

+/* list_files.c
+
+   Demonstrate the use of opendir() and related functions to list files
+   in a directory.
+
+   Walk through each directory named on the command line (current directory
+   if none are specified) to display a list of the files it contains.
+
+    Usage: list_files [dir...]
+*/
+#if defined(__APPLE__)
+        /* Darwin requires this header before including <dirent.h> */
+#include <sys/types.h>
+#endif
 #include <dirent.h>
 #include "tlpi_hdr.h"
 
 static void             /* List all files in directory 'dirpath' */
 listFiles(const char *dirpath)
 {
     DIR *dirp;
     struct dirent *dp;
     Boolean isCurrent;          /* True if 'dirpath' is "." */
 
     isCurrent = strcmp(dirpath, ".") == 0;
 
     dirp = opendir(dirpath);
     if (dirp  == NULL) {
         errMsg("opendir failed on '%s'", dirpath);
         return;
     }
 
     /* For each entry in this directory, print directory + filename */
 
     for (;;) {
         errno = 0;              /* To distinguish error from end-of-directory */
         dp = readdir(dirp);
         if (dp == NULL)
             break;
 
         if (strcmp(dp->d_name, ".") == 0 || strcmp(dp->d_name, "..") == 0)
             continue;           /* Skip . and .. */
 
         if (!isCurrent)
             printf("%s/", dirpath);
         printf("%s\n", dp->d_name);
     }
 
     if (errno != 0)
         errExit("readdir");
 
     if (closedir(dirp) == -1)
         errMsg("closedir");
 }
 
 int
 main(int argc, char *argv[])
 {
     if (argc > 1 && strcmp(argv[1], "--help") == 0)
         usageErr("%s [dir-path...]\n", argv[0]);
 
     if (argc == 1)              /* No arguments - use current directory */
         listFiles(".");
     else
         for (argv++; *argv; argv++)
             listFiles(*argv);
 
     exit(EXIT_SUCCESS);
 }