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ipc_recv_message.c
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59 lines
1.7 KiB
C
59 lines
1.7 KiB
C
/*
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* vim:ts=4:sw=4:expandtab
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*
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* i3 - an improved dynamic tiling window manager
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* © 2009-2012 Michael Stapelberg and contributors (see also: LICENSE)
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*
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*/
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#include <assert.h>
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#include <stdint.h>
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#include <stdlib.h>
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#include <string.h>
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#include <stdbool.h>
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#include <err.h>
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#include <sys/stat.h>
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#include <sys/types.h>
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#include <pwd.h>
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#include <unistd.h>
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#include "libi3.h"
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/*
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* Returns the name of a temporary file with the specified prefix.
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*
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*/
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char *get_process_filename(const char *prefix) {
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/* dir stores the directory path for this and all subsequent calls so that
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* we only create a temporary directory once per i3 instance. */
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static char *dir = NULL;
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if (dir == NULL) {
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/* Check if XDG_RUNTIME_DIR is set. If so, we use XDG_RUNTIME_DIR/i3 */
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if ((dir = getenv("XDG_RUNTIME_DIR"))) {
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char *tmp;
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sasprintf(&tmp, "%s/i3", dir);
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dir = tmp;
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struct stat buf;
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if (stat(dir, &buf) != 0) {
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if (mkdir(dir, 0700) == -1) {
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perror("mkdir()");
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return NULL;
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}
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}
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} else {
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/* If not, we create a (secure) temp directory using the template
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* /tmp/i3-<user>.XXXXXX */
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struct passwd *pw = getpwuid(getuid());
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const char *username = pw ? pw->pw_name : "unknown";
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sasprintf(&dir, "/tmp/i3-%s.XXXXXX", username);
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/* mkdtemp modifies dir */
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if (mkdtemp(dir) == NULL) {
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perror("mkdtemp()");
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return NULL;
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}
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}
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}
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char *filename;
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sasprintf(&filename, "%s/%s.%d", dir, prefix, getpid());
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return filename;
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}
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