Changeset 81716eb in mainline for uspace/app/bdsh/cmds/modules/touch/touch.c

Timestamp:

2012-04-08T17:53:15Z (12 years ago)

Author:

Jan Vesely <jano.vesely@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

c5bff3c

Parents:

1b90e90 (diff), f3378ba (diff)
Note: this is a merge changeset, the changes displayed below correspond to the merge itself.
Use the (diff) links above to see all the changes relative to each parent.

Message:

Mainline changes.

File:

• uspace/app/bdsh/cmds/modules/touch/touch.c (modified) (5 diffs)

uspace/app/bdsh/cmds/modules/touch/touch.c

@@ -27 +27 @@
  */
 
-/* TODO: Options that people would expect, such as not creating the file if
- * it doesn't exist, specifying the access time, etc */
+/*
+ * TODO: Options that people would expect, such as specifying the access time,
+ * etc.
+ */
 
 #include <stdio.h>
@@ -37 +39 @@
 #include <sys/types.h>
 #include <str.h>
+#include <getopt.h>
+#include <sys/stat.h>
+#include <errno.h>
 
 #include "config.h"
@@ -47 +52 @@
 static const char *cmdname = "touch";
 
+static struct option const long_options[] = {
+        { "no-create", no_argument, 0, 'c' },
+        { 0, 0, 0, 0 }
+};
+
 /* Dispays help for touch in various levels */
 void help_cmd_touch(unsigned int level)
 {
         if (level == HELP_SHORT) {
-                printf("`%s' updates access times for files\n", cmdname);
+                printf("`%s' updates access times of files\n", cmdname);
         } else {
                 help_cmd_touch(HELP_SHORT);
-                printf("  `%s' <file>, if the file does not exist it will be "
-                                "created\n", cmdname);
+                printf("Usage: `%s' [-c|--no-create] <file>...\n\n"
+                    "If the file does not exist it will be created empty,\n"
+                    "unless -c (--no-create) is supplied.\n\n"
+                    "Options:\n"
+                    "   -c, --no-create  Do not create new files\n",
+                    cmdname);
         }
-
+        
         return;
 }
@@ -64 +78 @@
 int cmd_touch(char **argv)
 {
-        unsigned int argc, i = 0, ret = 0;
-        int fd;
+        unsigned int argc = cli_count_args(argv);
+        unsigned int i = 0;
+        unsigned int ret = 0;
+        int c;
+        int longind;
+        bool no_create = false;
+        struct stat file_stat;
+        int fd = -1;
         char *buff = NULL;
-
+        
         DIR *dirp;
-
-        argc = cli_count_args(argv);
-
-        if (argc == 1) {
-                printf("%s - incorrect number of arguments. Try `help %s extended'\n",
-                        cmdname, cmdname);
+        
+        for (c = 0, optind = 0, longind = 0; c != -1; ) {
+                c = getopt_long(argc, argv, "c", long_options, &longind);
+                switch (c) {
+                case 'c':
+                        no_create = true;
+                        break;
+                }
+        }
+        
+        if (argc - optind < 1) {
+                printf("%s: Incorrect number of arguments. Try `help %s extended'\n",
+                    cmdname, cmdname);
                 return CMD_FAILURE;
         }
-
-        for (i = 1; i < argc; i ++) {
+        
+        for (i = optind; argv[i] != NULL; i++) {
                 buff = str_dup(argv[i]);
+                if (buff == NULL) {
+                        cli_error(CL_ENOMEM, "Out of memory");
+                        ret++;
+                        continue;
+                }
+                
                 dirp = opendir(buff);
                 if (dirp) {
-                        cli_error(CL_ENOTSUP, "%s is a directory", buff);
+                        cli_error(CL_ENOTSUP, "`%s' is a directory", buff);
                         closedir(dirp);
-                        ret ++;
+                        free(buff);
+                        ret++;
                         continue;
                 }
-
-                fd = open(buff, O_RDWR | O_CREAT);
+                
+                /* Check whether file exists if -c (--no-create) option is given */
+                if ((!no_create) || ((no_create) && (stat(buff, &file_stat) == EOK)))
+                        fd = open(buff, O_RDWR | O_CREAT);
+                
                 if (fd < 0) {
-                        cli_error(CL_EFAIL, "Could not update / create %s ", buff);
-                        ret ++;
+                        cli_error(CL_EFAIL, "Could not update or create `%s'", buff);
+                        free(buff);
+                        ret++;
                         continue;
-                } else
+                } else {
                         close(fd);
-
+                        fd = -1;
+                }
+                
                 free(buff);
         }
-
+        
         if (ret)
                 return CMD_FAILURE;
@@ -104 +144 @@
                 return CMD_SUCCESS;
 }
-