Annotation of embedaddon/tmux/cmd-load-buffer.c, revision 1.1
1.1 ! misho 1: /* $OpenBSD$ */
! 2:
! 3: /*
! 4: * Copyright (c) 2009 Tiago Cunha <me@tiagocunha.org>
! 5: *
! 6: * Permission to use, copy, modify, and distribute this software for any
! 7: * purpose with or without fee is hereby granted, provided that the above
! 8: * copyright notice and this permission notice appear in all copies.
! 9: *
! 10: * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
! 11: * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
! 12: * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
! 13: * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
! 14: * WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
! 15: * IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
! 16: * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
! 17: */
! 18:
! 19: #include <sys/types.h>
! 20:
! 21: #include <errno.h>
! 22: #include <fcntl.h>
! 23: #include <stdio.h>
! 24: #include <stdlib.h>
! 25: #include <string.h>
! 26: #include <unistd.h>
! 27:
! 28: #include "tmux.h"
! 29:
! 30: /*
! 31: * Loads a paste buffer from a file.
! 32: */
! 33:
! 34: static enum cmd_retval cmd_load_buffer_exec(struct cmd *, struct cmdq_item *);
! 35:
! 36: static void cmd_load_buffer_callback(struct client *, int, void *);
! 37:
! 38: const struct cmd_entry cmd_load_buffer_entry = {
! 39: .name = "load-buffer",
! 40: .alias = "loadb",
! 41:
! 42: .args = { "b:", 1, 1 },
! 43: .usage = CMD_BUFFER_USAGE " path",
! 44:
! 45: .flags = CMD_AFTERHOOK,
! 46: .exec = cmd_load_buffer_exec
! 47: };
! 48:
! 49: struct cmd_load_buffer_data {
! 50: struct cmdq_item *item;
! 51: char *bufname;
! 52: };
! 53:
! 54: static enum cmd_retval
! 55: cmd_load_buffer_exec(struct cmd *self, struct cmdq_item *item)
! 56: {
! 57: struct args *args = self->args;
! 58: struct cmd_load_buffer_data *cdata;
! 59: struct client *c = item->client;
! 60: FILE *f;
! 61: const char *path, *bufname;
! 62: char *pdata, *new_pdata, *cause, *file;
! 63: size_t psize;
! 64: int ch, error;
! 65:
! 66: bufname = NULL;
! 67: if (args_has(args, 'b'))
! 68: bufname = args_get(args, 'b');
! 69:
! 70: path = args->argv[0];
! 71: if (strcmp(path, "-") == 0) {
! 72: cdata = xcalloc(1, sizeof *cdata);
! 73: cdata->item = item;
! 74:
! 75: if (bufname != NULL)
! 76: cdata->bufname = xstrdup(bufname);
! 77:
! 78: error = server_set_stdin_callback(c, cmd_load_buffer_callback,
! 79: cdata, &cause);
! 80: if (error != 0) {
! 81: cmdq_error(item, "%s: %s", path, cause);
! 82: free(cause);
! 83: return (CMD_RETURN_ERROR);
! 84: }
! 85: return (CMD_RETURN_WAIT);
! 86: }
! 87:
! 88: file = server_client_get_path(c, path);
! 89: f = fopen(file, "rb");
! 90: if (f == NULL) {
! 91: cmdq_error(item, "%s: %s", file, strerror(errno));
! 92: free(file);
! 93: return (CMD_RETURN_ERROR);
! 94: }
! 95:
! 96: pdata = NULL;
! 97: psize = 0;
! 98: while ((ch = getc(f)) != EOF) {
! 99: /* Do not let the server die due to memory exhaustion. */
! 100: if ((new_pdata = realloc(pdata, psize + 2)) == NULL) {
! 101: cmdq_error(item, "realloc error: %s", strerror(errno));
! 102: goto error;
! 103: }
! 104: pdata = new_pdata;
! 105: pdata[psize++] = ch;
! 106: }
! 107: if (ferror(f)) {
! 108: cmdq_error(item, "%s: read error", file);
! 109: goto error;
! 110: }
! 111: if (pdata != NULL)
! 112: pdata[psize] = '\0';
! 113:
! 114: fclose(f);
! 115: free(file);
! 116:
! 117: if (paste_set(pdata, psize, bufname, &cause) != 0) {
! 118: cmdq_error(item, "%s", cause);
! 119: free(pdata);
! 120: free(cause);
! 121: return (CMD_RETURN_ERROR);
! 122: }
! 123:
! 124: return (CMD_RETURN_NORMAL);
! 125:
! 126: error:
! 127: free(pdata);
! 128: if (f != NULL)
! 129: fclose(f);
! 130: return (CMD_RETURN_ERROR);
! 131: }
! 132:
! 133: static void
! 134: cmd_load_buffer_callback(struct client *c, int closed, void *data)
! 135: {
! 136: struct cmd_load_buffer_data *cdata = data;
! 137: char *pdata, *cause, *saved;
! 138: size_t psize;
! 139:
! 140: if (!closed)
! 141: return;
! 142: c->stdin_callback = NULL;
! 143:
! 144: server_client_unref(c);
! 145: if (c->flags & CLIENT_DEAD)
! 146: goto out;
! 147:
! 148: psize = EVBUFFER_LENGTH(c->stdin_data);
! 149: if (psize == 0 || (pdata = malloc(psize + 1)) == NULL)
! 150: goto out;
! 151:
! 152: memcpy(pdata, EVBUFFER_DATA(c->stdin_data), psize);
! 153: pdata[psize] = '\0';
! 154: evbuffer_drain(c->stdin_data, psize);
! 155:
! 156: if (paste_set(pdata, psize, cdata->bufname, &cause) != 0) {
! 157: /* No context so can't use server_client_msg_error. */
! 158: if (~c->flags & CLIENT_UTF8) {
! 159: saved = cause;
! 160: cause = utf8_sanitize(saved);
! 161: free(saved);
! 162: }
! 163: evbuffer_add_printf(c->stderr_data, "%s", cause);
! 164: server_client_push_stderr(c);
! 165: free(pdata);
! 166: free(cause);
! 167: }
! 168: out:
! 169: cdata->item->flags &= ~CMDQ_WAITING;
! 170:
! 171: free(cdata->bufname);
! 172: free(cdata);
! 173: }
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