1 /* $OpenBSD: cmd-load-buffer.c,v 1.12 2010/06/28 22:10:42 nicm Exp $ */ 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 <stdio.h> 23 #include <stdlib.h> 24 #include <string.h> 25 #include <unistd.h> 26 27 #include "tmux.h" 28 29 /* 30 * Loads a session paste buffer from a file. 31 */ 32 33 int cmd_load_buffer_exec(struct cmd *, struct cmd_ctx *); 34 35 const struct cmd_entry cmd_load_buffer_entry = { 36 "load-buffer", "loadb", 37 CMD_BUFFER_SESSION_USAGE " path", 38 CMD_ARG1, "", 39 cmd_buffer_init, 40 cmd_buffer_parse, 41 cmd_load_buffer_exec, 42 cmd_buffer_free, 43 cmd_buffer_print 44 }; 45 46 int 47 cmd_load_buffer_exec(struct cmd *self, struct cmd_ctx *ctx) 48 { 49 struct cmd_buffer_data *data = self->data; 50 struct session *s; 51 FILE *f, *close_f; 52 char *pdata, *new_pdata; 53 size_t psize; 54 u_int limit; 55 int ch; 56 57 if ((s = cmd_find_session(ctx, data->target)) == NULL) 58 return (-1); 59 60 if (strcmp(data->arg, "-") == 0 ) { 61 if (ctx->cmdclient == NULL) { 62 ctx->error(ctx, "%s: can't read from stdin", data->arg); 63 return (-1); 64 } 65 f = ctx->cmdclient->stdin_file; 66 if (isatty(fileno(ctx->cmdclient->stdin_file))) { 67 ctx->error(ctx, "%s: stdin is a tty", data->arg); 68 return (-1); 69 } 70 close_f = NULL; 71 } else { 72 if ((f = fopen(data->arg, "rb")) == NULL) { 73 ctx->error(ctx, "%s: %s", data->arg, strerror(errno)); 74 return (-1); 75 } 76 close_f = f; 77 } 78 79 pdata = NULL; 80 psize = 0; 81 while ((ch = getc(f)) != EOF) { 82 /* Do not let the server die due to memory exhaustion. */ 83 if ((new_pdata = realloc(pdata, psize + 2)) == NULL) { 84 ctx->error(ctx, "realloc error: %s", strerror(errno)); 85 goto error; 86 } 87 pdata = new_pdata; 88 pdata[psize++] = ch; 89 } 90 if (ferror(f)) { 91 ctx->error(ctx, "%s: read error", data->arg); 92 goto error; 93 } 94 if (pdata != NULL) 95 pdata[psize] = '\0'; 96 97 if (close_f != NULL) 98 fclose(close_f); 99 100 limit = options_get_number(&s->options, "buffer-limit"); 101 if (data->buffer == -1) { 102 paste_add(&s->buffers, pdata, psize, limit); 103 return (0); 104 } 105 if (paste_replace(&s->buffers, data->buffer, pdata, psize) != 0) { 106 ctx->error(ctx, "no buffer %d", data->buffer); 107 goto error; 108 } 109 110 return (0); 111 112 error: 113 if (pdata != NULL) 114 xfree(pdata); 115 if (close_f != NULL) 116 fclose(close_f); 117 return (-1); 118 } 119