136 lines
3.3 KiB
C
136 lines
3.3 KiB
C
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#include <stdlib.h>
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#include <unistd.h>
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#include <sys/types.h>
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#include <signal.h>
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#include <stdio.h>
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#include <fcntl.h>
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#include <string.h>
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#include <errno.h>
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#include <ev.h>
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#include "common.h"
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ev_io *child_io;
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ev_child *child_sig;
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void cleanup() {
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ev_io_stop(main_loop, child_io);
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ev_child_stop(main_loop, child_sig);
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FREE(child_io);
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FREE(child_sig);
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FREE(statusline);
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}
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void strip_dzen_formats(char *buffer) {
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char *src = buffer;
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char *dest = buffer;
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while (*src != '\0') {
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if (*src == '^') {
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if (!strncmp(src, "^ro", strlen("^ro"))) {
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*(dest++) = ' ';
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*(dest++) = '|';
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*(dest++) = ' ';
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}
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while (*src != ')') {
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src++;
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}
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src++;
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} else {
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*dest = *src;
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src++;
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dest++;
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}
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}
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*(--dest) = '\0';
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}
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void child_io_cb(struct ev_loop *loop, ev_io *watcher, int revents) {
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int fd = watcher->fd;
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int n = 0;
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int rec = 0;
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int buffer_len = STDIN_CHUNK_SIZE;
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char *buffer = malloc(buffer_len);
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memset(buffer, '\0', buffer_len);
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while(1) {
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n = read(fd, buffer + rec, buffer_len - rec);
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if (n == -1) {
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if (errno == EAGAIN) {
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break;
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}
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printf("ERROR: read() failed!");
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exit(EXIT_FAILURE);
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}
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if (n == 0) {
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if (rec == buffer_len) {
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char *tmp = buffer;
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buffer = malloc(buffer_len + STDIN_CHUNK_SIZE);
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memset(buffer, '\0', buffer_len);
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strncpy(buffer, tmp, buffer_len);
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buffer_len += STDIN_CHUNK_SIZE;
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FREE(tmp);
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} else {
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break;
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}
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}
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rec += n;
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}
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if (strlen(buffer) == 0) {
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FREE(buffer);
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return;
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}
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strip_dzen_formats(buffer);
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FREE(statusline);
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statusline = buffer;
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printf("%s", buffer);
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draw_bars();
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}
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void child_sig_cb(struct ev_loop *loop, ev_child *watcher, int revents) {
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printf("Child (pid: %d) unexpectedly exited with status %d\n", child_pid, watcher->rstatus);
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cleanup();
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}
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void start_child(char *command) {
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int fd[2];
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pipe(fd);
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child_pid = fork();
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switch (child_pid) {
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case -1:
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printf("ERROR: Couldn't fork()");
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exit(EXIT_FAILURE);
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case 0:
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close(fd[0]);
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dup2(fd[1], STDOUT_FILENO);
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static const char *shell = NULL;
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if ((shell = getenv("SHELL")) == NULL)
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shell = "/bin/sh";
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execl(shell, shell, "-c", command, (char*) NULL);
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break;
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default:
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close(fd[1]);
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dup2(fd[0], STDIN_FILENO);
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fcntl(STDIN_FILENO, F_SETFL, O_NONBLOCK);
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child_io = malloc(sizeof(ev_io));
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ev_io_init(child_io, &child_io_cb, STDIN_FILENO, EV_READ);
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ev_io_start(main_loop, child_io);
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/* We must cleanup, if the child unexpectedly terminates */
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child_sig = malloc(sizeof(ev_io));
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ev_child_init(child_sig, &child_sig_cb, child_pid, 0);
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ev_child_start(main_loop, child_sig);
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break;
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}
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}
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void kill_child() {
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kill(child_pid, SIGQUIT);
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cleanup();
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}
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