diff options
Diffstat (limited to 'cmd-show-environment.c')
| -rw-r--r-- | cmd-show-environment.c | 143 |
1 files changed, 143 insertions, 0 deletions
diff --git a/cmd-show-environment.c b/cmd-show-environment.c new file mode 100644 index 0000000..b52db36 --- /dev/null +++ b/cmd-show-environment.c @@ -0,0 +1,143 @@ +/* $OpenBSD$ */ + +/* + * Copyright (c) 2009 Nicholas Marriott <nicholas.marriott@gmail.com> + * + * Permission to use, copy, modify, and distribute this software for any + * purpose with or without fee is hereby granted, provided that the above + * copyright notice and this permission notice appear in all copies. + * + * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES + * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR + * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES + * WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER + * IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING + * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. + */ + +#include <sys/types.h> + +#include <stdlib.h> +#include <string.h> + +#include "tmux.h" + +/* + * Show environment. + */ + +static enum cmd_retval cmd_show_environment_exec(struct cmd *, + struct cmdq_item *); + +static char *cmd_show_environment_escape(struct environ_entry *); +static void cmd_show_environment_print(struct cmd *, struct cmdq_item *, + struct environ_entry *); + +const struct cmd_entry cmd_show_environment_entry = { + .name = "show-environment", + .alias = "showenv", + + .args = { "hgst:", 0, 1, NULL }, + .usage = "[-hgs] " CMD_TARGET_SESSION_USAGE " [name]", + + .target = { 't', CMD_FIND_SESSION, CMD_FIND_CANFAIL }, + + .flags = CMD_AFTERHOOK, + .exec = cmd_show_environment_exec +}; + +static char * +cmd_show_environment_escape(struct environ_entry *envent) +{ + const char *value = envent->value; + char c, *out, *ret; + + out = ret = xmalloc(strlen(value) * 2 + 1); /* at most twice the size */ + while ((c = *value++) != '\0') { + /* POSIX interprets $ ` " and \ in double quotes. */ + if (c == '$' || c == '`' || c == '"' || c == '\\') + *out++ = '\\'; + *out++ = c; + } + *out = '\0'; + + return (ret); +} + +static void +cmd_show_environment_print(struct cmd *self, struct cmdq_item *item, + struct environ_entry *envent) +{ + struct args *args = cmd_get_args(self); + char *escaped; + + if (!args_has(args, 'h') && (envent->flags & ENVIRON_HIDDEN)) + return; + if (args_has(args, 'h') && (~envent->flags & ENVIRON_HIDDEN)) + return; + + if (!args_has(args, 's')) { + if (envent->value != NULL) + cmdq_print(item, "%s=%s", envent->name, envent->value); + else + cmdq_print(item, "-%s", envent->name); + return; + } + + if (envent->value != NULL) { + escaped = cmd_show_environment_escape(envent); + cmdq_print(item, "%s=\"%s\"; export %s;", envent->name, escaped, + envent->name); + free(escaped); + } else + cmdq_print(item, "unset %s;", envent->name); +} + +static enum cmd_retval +cmd_show_environment_exec(struct cmd *self, struct cmdq_item *item) +{ + struct args *args = cmd_get_args(self); + struct cmd_find_state *target = cmdq_get_target(item); + struct environ *env; + struct environ_entry *envent; + const char *tflag, *name = args_string(args, 0); + + if ((tflag = args_get(args, 't')) != NULL) { + if (target->s == NULL) { + cmdq_error(item, "no such session: %s", tflag); + return (CMD_RETURN_ERROR); + } + } + + if (args_has(args, 'g')) + env = global_environ; + else { + if (target->s == NULL) { + tflag = args_get(args, 't'); + if (tflag != NULL) + cmdq_error(item, "no such session: %s", tflag); + else + cmdq_error(item, "no current session"); + return (CMD_RETURN_ERROR); + } + env = target->s->environ; + } + + if (name != NULL) { + envent = environ_find(env, name); + if (envent == NULL) { + cmdq_error(item, "unknown variable: %s", name); + return (CMD_RETURN_ERROR); + } + cmd_show_environment_print(self, item, envent); + return (CMD_RETURN_NORMAL); + } + + envent = environ_first(env); + while (envent != NULL) { + cmd_show_environment_print(self, item, envent); + envent = environ_next(envent); + } + return (CMD_RETURN_NORMAL); +} |