Changeset 2640b6c in mainline for uspace/app/bdsh/cmds/modules/cp/cp.c

Timestamp:

2008-11-28T09:33:38Z (16 years ago)

Author:

Tim Post <echo@…>

Branches:

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

Children:

ee02922

Parents:

e5557131

Message:

Implement a rudamentary 'cp' for testing write()

File:

• uspace/app/bdsh/cmds/modules/cp/cp.c (modified) (2 diffs)

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

@@ -31 +31 @@
 #include <stdio.h>
 #include <stdlib.h>
+#include <unistd.h>
+#include <getopt.h>
+#include <string.h>
+#include <fcntl.h>
 #include "config.h"
 #include "util.h"
@@ -38 +42 @@
 #include "cmds.h"
 
-static char *cmdname = "cp";
-
-/* Dispays help for cp in various levels */
+#define CP_VERSION "0.0.1"
+#define CP_DEFAULT_BUFLEN  1024
+
+static const char *cmdname = "cp";
+
+static struct option const long_options[] = {
+        { "buffer", required_argument, 0, 'b' },
+        { "force", no_argument, 0, 'f' },
+        { "recursive", no_argument, 0, 'r' },
+        { "help", no_argument, 0, 'h' },
+        { "version", no_argument, 0, 'v' },
+        { "verbose", no_argument, 0, 'V' },
+        { 0, 0, 0, 0 }
+};
+
+static int strtoint(const char *s1)
+{
+        long t1;
+
+        if (-1 == (t1 = strtol(s1, (char **) NULL, 10)))
+                return -1;
+
+        if (t1 <= 0)
+                return -1;
+
+        return (int) t1;
+}
+
+static size_t copy_file(const char *src, const char *dest, size_t blen, int vb)
+{
+        int fd1, fd2, bytes = 0;
+        off_t total = 0;
+        size_t copied = 0;
+        char *buff = NULL;
+
+        if (vb)
+                printf("Copying %s to %s\n", src, dest);
+
+        if (-1 == (fd1 = open(src, O_RDONLY))) {
+                printf("Unable to open source file %s\n", src);
+                return 0;
+        }
+
+        if (-1 == (fd2 = open(dest, O_CREAT))) {
+                printf("Unable to open destination file %s\n", dest);
+                return 0;
+        }
+
+        total = lseek(fd1, 0, SEEK_END);
+
+        if (vb)
+                printf("%d bytes to copy\n", total);
+
+        lseek(fd1, 0, SEEK_SET);
+
+        if (NULL == (buff = (char *) malloc(blen + 1))) {
+                printf("Unable to allocate enough memory to read %s\n",
+                        src);
+                goto out;
+        }
+
+        do {
+                if (-1 == (bytes = read(fd1, buff, blen)))
+                        break;
+                copied += bytes;
+                write(fd2, buff, blen);
+        } while (bytes > 0);
+
+        if (bytes == -1) {
+                printf("Error copying %s\n", src);
+                copied = 0;
+                goto out;
+        }
+
+out:
+        close(fd1);
+        close(fd2);
+        if (buff)
+                free(buff);
+        return copied;
+}
+
 void help_cmd_cp(unsigned int level)
 {
-        printf("This is the %s help for '%s'.\n",
-                level ? EXT_HELP : SHORT_HELP, cmdname);
+        if (level == HELP_SHORT) {
+                printf("`%s' copies files and directories\n", cmdname);
+        } else {
+                help_cmd_cp(HELP_SHORT);
+                printf(
+                "Usage:  %s [options] <source> <dest>\n"
+                "Options: (* indicates not yet implemented)\n"
+                "  -h, --help       A short option summary\n"
+                "  -v, --version    Print version information and exit\n"
+                "* -V, --verbose    Be annoyingly noisy about what's being done\n"
+                "* -f, --force      Do not complain when <dest> exists\n"
+                "* -r, --recursive  Copy entire directories\n"
+                "  -b, --buffer ## Set the read buffer size to ##\n"
+                "Currently, %s is under development, some options might not work.\n",
+                cmdname, cmdname);
+        }
+
         return;
 }
 
-/* Main entry point for cp, accepts an array of arguments */
 int cmd_cp(char **argv)
 {
-        unsigned int argc;
-        unsigned int i;
-
-        /* Count the arguments */
-        for (argc = 0; argv[argc] != NULL; argc ++);
-
-        printf("%s %s\n", TEST_ANNOUNCE, cmdname);
-        printf("%d arguments passed to %s", argc - 1, cmdname);
-
-        if (argc < 2) {
-                printf("\n");
+        unsigned int argc, buffer = CP_DEFAULT_BUFLEN, verbose = 0;
+        int c, opt_ind, ret = 0;
+
+        argc = cli_count_args(argv);
+
+        for (c = 0, optind = 0, opt_ind = 0; c != -1;) {
+                c = getopt_long(argc, argv, "hvVfrb:", long_options, &opt_ind);
+                switch (c) { 
+                case 'h':
+                        help_cmd_cp(1);
+                        return CMD_SUCCESS;
+                case 'v':
+                        printf("%d\n", CP_VERSION);
+                        return CMD_SUCCESS;
+                case 'V':
+                        verbose = 1;
+                        break;
+                case 'f':
+                        break;
+                case 'r':
+                        break;
+                case 'b':
+                        if (-1 == (buffer = strtoint(optarg))) {
+                                printf("%s: Invalid buffer specification, "
+                                        "(should be a number greater than zero)\n",
+                                        cmdname);
+                                return CMD_FAILURE;
+                        }
+                        break;
+                }
+        }
+
+        argc -= optind;
+
+        if (argc != 2) {
+                printf("%s: invalid number of arguments. Try %s --help\n",
+                        cmdname, cmdname);
+                return CMD_FAILURE;
+        }
+
+        ret = copy_file(argv[optind], argv[optind + 1], buffer, verbose);
+
+        if (verbose)
+                printf("%d bytes copied (buffer = %d)\n", ret, buffer);
+
+        if (ret)
                 return CMD_SUCCESS;
-        }
-
-        printf(":\n");
-        for (i = 1; i < argc; i++)
-                printf("[%d] -> %s\n", i, argv[i]);
-
-        return CMD_SUCCESS;
-}
-
+        else
+                return CMD_FAILURE;
+}
+