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Signed-off-by: Ronnie Sahlberg <[email protected]>
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| Original file line number | Diff line number | Diff line change |
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| /* | ||
| Copyright (C) by Ronnie Sahlberg <[email protected]> 2015 | ||
| This program is free software; you can redistribute it and/or modify | ||
| it under the terms of the GNU General Public License as published by | ||
| the Free Software Foundation; either version 3 of the License, or | ||
| (at your option) any later version. | ||
| This program is distributed in the hope that it will be useful, | ||
| but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
| GNU General Public License for more details. | ||
| You should have received a copy of the GNU General Public License | ||
| along with this program; if not, see <http://www.gnu.org/licenses/>. | ||
| */ | ||
|
|
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| #define _FILE_OFFSET_BITS 64 | ||
| #define _GNU_SOURCE | ||
|
|
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| #ifdef HAVE_CONFIG_H | ||
| #include "config.h" | ||
| #endif | ||
|
|
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| #ifdef AROS | ||
| #include "aros_compat.h" | ||
| #endif | ||
|
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|
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| #ifdef WIN32 | ||
| #include <win32/win32_compat.h> | ||
| #pragma comment(lib, "ws2_32.lib") | ||
| WSADATA wsaData; | ||
| #else | ||
| #include <sys/stat.h> | ||
| #include <string.h> | ||
| #endif | ||
|
|
||
| #ifdef HAVE_POLL_H | ||
| #include <poll.h> | ||
| #endif | ||
|
|
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| #ifdef HAVE_UNISTD_H | ||
| #include <unistd.h> | ||
| #endif | ||
|
|
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| #include <stdio.h> | ||
| #include <stdlib.h> | ||
| #include <stdint.h> | ||
| #include <sys/types.h> | ||
| #include <sys/uio.h> | ||
| #include <fcntl.h> | ||
| #include "libnfs.h" | ||
| #include "libnfs-raw.h" | ||
| #include "libnfs-raw-mount.h" | ||
|
|
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| struct file_context { | ||
| int fd; | ||
| struct nfs_context *nfs; | ||
| struct nfsfh *nfsfh; | ||
| struct nfs_url *url; | ||
| }; | ||
|
|
||
| void usage(void) | ||
| { | ||
| fprintf(stderr, "Usage: nfs-cat-preadv <file>\n"); | ||
| fprintf(stderr, "<file> cat an nfs file.\n"); | ||
| exit(0); | ||
| } | ||
|
|
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| static void | ||
| free_file_context(struct file_context *file_context) | ||
| { | ||
| if (file_context->fd != -1) { | ||
| close(file_context->fd); | ||
| } | ||
| if (file_context->nfsfh != NULL) { | ||
| nfs_close(file_context->nfs, file_context->nfsfh); | ||
| } | ||
| if (file_context->nfs != NULL) { | ||
| nfs_destroy_context(file_context->nfs); | ||
| } | ||
| nfs_destroy_url(file_context->url); | ||
| free(file_context); | ||
| } | ||
|
|
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| static struct file_context * | ||
| open_file(const char *url, int flags) | ||
| { | ||
| struct file_context *file_context; | ||
|
|
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| file_context = malloc(sizeof(struct file_context)); | ||
| if (file_context == NULL) { | ||
| fprintf(stderr, "Failed to malloc file_context\n"); | ||
| return NULL; | ||
| } | ||
| file_context->fd = -1; | ||
| file_context->nfs = NULL; | ||
| file_context->nfsfh = NULL; | ||
| file_context->url = NULL; | ||
|
|
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| file_context->nfs = nfs_init_context(); | ||
| if (file_context->nfs == NULL) { | ||
| fprintf(stderr, "failed to init context\n"); | ||
| free_file_context(file_context); | ||
| return NULL; | ||
| } | ||
|
|
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| file_context->url = nfs_parse_url_full(file_context->nfs, url); | ||
| if (file_context->url == NULL) { | ||
| fprintf(stderr, "%s\n", nfs_get_error(file_context->nfs)); | ||
| free_file_context(file_context); | ||
| return NULL; | ||
| } | ||
|
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| if (nfs_mount(file_context->nfs, file_context->url->server, | ||
| file_context->url->path) != 0) { | ||
| fprintf(stderr, "Failed to mount nfs share : %s\n", | ||
| nfs_get_error(file_context->nfs)); | ||
| free_file_context(file_context); | ||
| return NULL; | ||
| } | ||
|
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| if (flags == O_RDONLY) { | ||
| if (nfs_open(file_context->nfs, file_context->url->file, flags, | ||
| &file_context->nfsfh) != 0) { | ||
| fprintf(stderr, "Failed to open file %s: %s\n", | ||
| file_context->url->file, | ||
| nfs_get_error(file_context->nfs)); | ||
| free_file_context(file_context); | ||
| return NULL; | ||
| } | ||
| } else { | ||
| if (nfs_creat(file_context->nfs, file_context->url->file, 0660, | ||
| &file_context->nfsfh) != 0) { | ||
| fprintf(stderr, "Failed to creat file %s: %s\n", | ||
| file_context->url->file, | ||
| nfs_get_error(file_context->nfs)); | ||
| free_file_context(file_context); | ||
| return NULL; | ||
| } | ||
| } | ||
| return file_context; | ||
| } | ||
|
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| #define BUFSIZE 10240 | ||
| static char buf2[BUFSIZE]; | ||
| static char buf1[BUFSIZE]; | ||
| static char buf0[BUFSIZE]; | ||
|
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| int main(int argc, char *argv[]) | ||
| { | ||
| struct file_context *nf; | ||
| struct nfs_stat_64 st; | ||
| uint64_t off; | ||
| int64_t count; | ||
| int i; | ||
|
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| #ifdef WIN32 | ||
| if (WSAStartup(MAKEWORD(2,2), &wsaData) != 0) { | ||
| printf("Failed to start Winsock2\n"); | ||
| return 10; | ||
| } | ||
| #endif | ||
|
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| #ifdef AROS | ||
| aros_init_socket(); | ||
| #endif | ||
|
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| if (argc < 2) { | ||
| usage(); | ||
| } | ||
|
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| nf = open_file(argv[1], O_RDONLY); | ||
| if (nf == NULL) { | ||
| fprintf(stderr, "Failed to open %s\n", argv[1]); | ||
| exit(10); | ||
| } | ||
| if (nfs_fstat64(nf->nfs, nf->nfsfh, &st) < 0) { | ||
| fprintf(stderr, "Failed to stat %s\n", argv[1]); | ||
| exit(10); | ||
| } | ||
|
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| off = 0; | ||
| while (off < st.nfs_size) { | ||
| struct iovec iov[3]; | ||
|
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| iov[0].iov_base = buf0; | ||
| iov[0].iov_len = sizeof(buf0); | ||
| iov[1].iov_base = buf1; | ||
| iov[1].iov_len = sizeof(buf1); | ||
| iov[2].iov_base = buf2; | ||
| iov[2].iov_len = sizeof(buf2); | ||
| count = st.nfs_size - off; | ||
| if (count > 3 * BUFSIZE) { | ||
| count = BUFSIZE; | ||
| } | ||
|
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| count = nfs_preadv(nf->nfs, nf->nfsfh, iov, 3, off); | ||
| if (count < 0) { | ||
| fprintf(stderr, "Failed to read from file\n"); | ||
| free_file_context(nf); | ||
| return 10; | ||
| } | ||
| off += count; | ||
| for (i = 0; i < 3; i++) { | ||
| if (count >= iov[i].iov_len) { | ||
| fwrite(iov[i].iov_base, iov[i].iov_len, 1, stdout); | ||
| count -= iov[i].iov_len; | ||
| } else { | ||
| fwrite(iov[i].iov_base, count, 1, stdout); | ||
| count = 0; | ||
| } | ||
| if (count == 0) { | ||
| break; | ||
| } | ||
| } | ||
| } | ||
|
|
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| free_file_context(nf); | ||
|
|
||
| return 0; | ||
| } |
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