*/
#include <sys/types.h>
#include <sys/stat.h>
+#include <sys/wait.h>
#include <unistd.h>
#include <fcntl.h>
#include <limits.h>
+#include <libgen.h>
#include "all.h"
return 1;
}
+/*
+ * Goes through each line of buf (separated by \n) and checks for statements /
+ * commands which only occur in i3 v4 configuration files. If it finds any, it
+ * returns version 4, otherwise it returns version 3.
+ *
+ */
+static int detect_version(char *buf) {
+ char *walk = buf;
+ char *line = buf;
+ while (*walk != '\0') {
+ if (*walk != '\n') {
+ walk++;
+ continue;
+ }
+
+ /* check for some v4-only statements */
+ if (strncasecmp(line, "bindcode", strlen("bindcode")) == 0 ||
+ strncasecmp(line, "# i3 config file (v4)", strlen("# i3 config file (v4)")) == 0 ||
+ strncasecmp(line, "workspace_layout", strlen("workspace_layout")) == 0) {
+ printf("deciding for version 4 due to this line: %.*s\n", (int)(walk-line), line);
+ return 4;
+ }
+
+ /* if this is a bind statement, we can check the command */
+ if (strncasecmp(line, "bind", strlen("bind")) == 0) {
+ char *bind = strchr(line, ' ');
+ if (bind == NULL)
+ goto next;
+ while ((*bind == ' ' || *bind == '\t') && *bind != '\0')
+ bind++;
+ if (*bind == '\0')
+ goto next;
+ if ((bind = strchr(bind, ' ')) == NULL)
+ goto next;
+ while ((*bind == ' ' || *bind == '\t') && *bind != '\0')
+ bind++;
+ if (*bind == '\0')
+ goto next;
+ if (strncasecmp(bind, "layout", strlen("layout")) == 0 ||
+ strncasecmp(bind, "floating", strlen("floating")) == 0 ||
+ strncasecmp(bind, "workspace", strlen("workspace")) == 0 ||
+ strncasecmp(bind, "focus left", strlen("focus left")) == 0 ||
+ strncasecmp(bind, "focus right", strlen("focus right")) == 0 ||
+ strncasecmp(bind, "focus up", strlen("focus up")) == 0 ||
+ strncasecmp(bind, "focus down", strlen("focus down")) == 0 ||
+ strncasecmp(bind, "border normal", strlen("border normal")) == 0 ||
+ strncasecmp(bind, "border 1pixel", strlen("border 1pixel")) == 0 ||
+ strncasecmp(bind, "border borderless", strlen("border borderless")) == 0) {
+ printf("deciding for version 4 due to this line: %.*s\n", (int)(walk-line), line);
+ return 4;
+ }
+ }
+
+next:
+ /* advance to the next line */
+ walk++;
+ line = walk;
+ }
+
+ return 3;
+}
+
+/*
+ * Calls i3-migrate-config-to-v4.pl to migrate a configuration file (input
+ * buffer).
+ *
+ * Returns the converted config file or NULL if there was an error (for
+ * example the script could not be found in $PATH or the i3 executable’s
+ * directory).
+ *
+ */
+static char *migrate_config(char *input, off_t size) {
+ int writepipe[2];
+ int readpipe[2];
+
+ if (pipe(writepipe) != 0 ||
+ pipe(readpipe) != 0) {
+ warn("migrate_config: Could not create pipes");
+ return NULL;
+ }
+
+ pid_t pid = fork();
+ if (pid == -1) {
+ warn("Could not fork()");
+ return NULL;
+ }
+
+ /* child */
+ if (pid == 0) {
+ /* close writing end of writepipe, connect reading side to stdin */
+ close(writepipe[1]);
+ dup2(writepipe[0], 0);
+
+ /* close reading end of readpipe, connect writing side to stdout */
+ close(readpipe[0]);
+ dup2(readpipe[1], 1);
+
+ /* start the migration script, search PATH first */
+ char *migratepath = "i3-migrate-config-to-v4.pl";
+ execlp(migratepath, migratepath, NULL);
+
+ /* if the script is not in path, maybe the user installed to a strange
+ * location and runs the i3 binary with an absolute path. We use
+ * argv[0]’s dirname */
+ char *pathbuf = strdup(start_argv[0]);
+ char *dir = dirname(pathbuf);
+ asprintf(&migratepath, "%s/%s", dir, "i3-migrate-config-to-v4.pl");
+ execlp(migratepath, migratepath, NULL);
+
+#if defined(__linux__)
+ /* on linux, we have one more fall-back: dirname(/proc/self/exe) */
+ char buffer[BUFSIZ];
+ if (readlink("/proc/self/exe", buffer, BUFSIZ) == -1) {
+ warn("could not read /proc/self/exe");
+ exit(1);
+ }
+ dir = dirname(buffer);
+ asprintf(&migratepath, "%s/%s", dir, "i3-migrate-config-to-v4.pl");
+ execlp(migratepath, migratepath, NULL);
+#endif
+
+ warn("Could not start i3-migrate-config-to-v4.pl");
+ exit(2);
+ }
+
+ /* parent */
+
+ /* close reading end of the writepipe (connected to the script’s stdin) */
+ close(writepipe[0]);
+
+ /* write the whole config file to the pipe, the script will read everything
+ * immediately */
+ int written = 0;
+ int ret;
+ while (written < size) {
+ if ((ret = write(writepipe[1], input + written, size - written)) < 0) {
+ warn("Could not write to pipe");
+ return NULL;
+ }
+ written += ret;
+ }
+ close(writepipe[1]);
+
+ /* close writing end of the readpipe (connected to the script’s stdout) */
+ close(readpipe[1]);
+
+ /* read the script’s output */
+ int conv_size = 65535;
+ char *converted = malloc(conv_size);
+ int read_bytes = 0;
+ do {
+ if (read_bytes == conv_size) {
+ conv_size += 65535;
+ converted = realloc(converted, conv_size);
+ }
+ ret = read(readpipe[0], converted + read_bytes, conv_size - read_bytes);
+ if (ret == -1) {
+ warn("Cannot read from pipe");
+ return NULL;
+ }
+ read_bytes += ret;
+ } while (ret > 0);
+
+ /* get the returncode */
+ int status;
+ wait(&status);
+ if (!WIFEXITED(status)) {
+ fprintf(stderr, "Child did not terminate normally, using old config file (will lead to broken behaviour)\n");
+ return NULL;
+ }
+
+ int returncode = WEXITSTATUS(status);
+ if (returncode != 0) {
+ fprintf(stderr, "Migration process exit code was != 0\n");
+ if (returncode == 2) {
+ fprintf(stderr, "could not start the migration script\n");
+ /* TODO: script was not found. tell the user to fix his system or create a v4 config */
+ } else if (returncode == 1) {
+ fprintf(stderr, "This already was a v4 config. Please add the following line to your config file:\n");
+ fprintf(stderr, "# i3 config file (v4)\n");
+ /* TODO: nag the user with a message to include a hint for i3 in his config file */
+ }
+ return NULL;
+ }
+
+ return converted;
+}
+
void parse_file(const char *f) {
SLIST_HEAD(variables_head, Variable) variables = SLIST_HEAD_INITIALIZER(&variables);
int fd, ret, read_bytes = 0;
}
}
+ /* analyze the string to find out whether this is an old config file (3.x)
+ * or a new config file (4.x). If it’s old, we run the converter script. */
+ int version = detect_version(buf);
+ if (version == 3) {
+ /* We need to convert this v3 configuration */
+ char *converted = migrate_config(new, stbuf.st_size);
+ if (converted != NULL) {
+ printf("\n");
+ printf("****************************************************************\n");
+ printf("NOTE: Automatically converted configuration file from v3 to v4.\n");
+ printf("\n");
+ printf("Please convert your config file to v4. You can use this command:\n");
+ printf(" mv %s %s.O\n", f, f);
+ printf(" i3-migrate-config-to-v4.pl %s.O > %s\n", f, f);
+ printf("****************************************************************\n");
+ printf("\n");
+ free(new);
+ new = converted;
+ } else {
+ printf("\n");
+ printf("**********************************************************************\n");
+ printf("ERROR: Could not convert config file. Maybe i3-migrate-config-to-v4.pl\n");
+ printf("was not correctly installed on your system?\n");
+ printf("**********************************************************************\n");
+ printf("\n");
+ }
+ }
+
+ /* now lex/parse it */
yy_scan_string(new);
context = scalloc(sizeof(struct context));
projects / i3 / i3 / commitdiff