| 30,6 → 30,11 |
|---|
| |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <unistd.h> |
| #include <getopt.h> |
| #include <string.h> |
| #include <fcntl.h> |
| #include <assert.h> |
| #include "config.h" |
| #include "util.h" |
| #include "errors.h" |
| 37,37 → 42,183 |
|---|
| #include "cp.h" |
| #include "cmds.h" |
| |
| static char *cmdname = "cp"; |
| #define CP_VERSION "0.0.1" |
| #define CP_DEFAULT_BUFLEN 1024 |
| |
| /* Dispays help for cp in various levels */ |
| 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 int64_t copy_file(const char *src, const char *dest, size_t blen, int vb) |
| { |
| int fd1, fd2, bytes = 0; |
| off_t total = 0; |
| int64_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 -1; |
| } |
| |
| if (-1 == (fd2 = open(dest, O_CREAT))) { |
| printf("Unable to open destination file %s\n", dest); |
| close(fd1); |
| return -1; |
| } |
| |
| 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))) { |
| printf("Unable to allocate enough memory to read %s\n", |
| src); |
| copied = -1; |
| goto out; |
| } |
| |
| for (;;) { |
| ssize_t res; |
| |
| bytes = read(fd1, buff, blen); |
| if (bytes <= 0) |
| break; |
| copied += bytes; |
| res = bytes; |
| do { |
| /* |
| * Theoretically, it may not be enough to call write() |
| * only once. Also the previous read() may have |
| * returned less data than requested. |
| */ |
| bytes = write(fd2, buff, res); |
| if (bytes < 0) |
| goto err; |
| res -= bytes; |
| } while (res > 0); |
| assert(res == 0); |
| } |
| |
| if (bytes < 0) { |
| err: |
| printf("Error copying %s, (%d)\n", src, bytes); |
| copied = bytes; |
| } |
| |
| 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); |
| static char helpfmt[] = |
| "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 may not work.\n"; |
| if (level == HELP_SHORT) { |
| printf("`%s' copies files and directories\n", cmdname); |
| } else { |
| help_cmd_cp(HELP_SHORT); |
| printf(helpfmt, cmdname, cmdname); |
| } |
| |
| return; |
| } |
| |
| /* Main entry point for cp, accepts an array of arguments */ |
| int cmd_cp(char **argv) |
| { |
| unsigned int argc; |
| unsigned int i; |
| unsigned int argc, buffer = 0, verbose = 0; |
| int c, opt_ind; |
| int64_t ret; |
| |
| /* Count the arguments */ |
| for (argc = 0; argv[argc] != NULL; argc ++); |
| argc = cli_count_args(argv); |
| |
| printf("%s %s\n", TEST_ANNOUNCE, cmdname); |
| printf("%d arguments passed to %s", argc - 1, cmdname); |
| |
| if (argc < 2) { |
| printf("\n"); |
| 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; |
| } |
| if (verbose) |
| printf("Buffer = %d\n", buffer); |
| break; |
| } |
| } |
| |
| printf(":\n"); |
| for (i = 1; i < argc; i++) |
| printf("[%d] -> %s\n", i, argv[i]); |
| if (buffer == 0) |
| buffer = CP_DEFAULT_BUFLEN; |
| |
| 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\n", ret); |
| |
| if (ret >= 0) |
| return CMD_SUCCESS; |
| else |
| return CMD_FAILURE; |
| } |
| |