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- Committer: Björn Påhlsson
- Date: 2010-09-07 18:41:35 UTC
- mfrom: (237.2.180 mandos)
- mto: (237.7.1 mandos)
- mto: This revision was merged to the branch mainline in revision 270.
- Revision ID: belorn@fukt.bsnet.se-20100907184135-hcd2aou8r2trz8cy
merge
added
removed
plugins.d/usplash.c
31
31
#include <fcntl.h> /* open(), O_WRONLY, O_RDONLY */
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#include <iso646.h> /* and, or, not*/
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#include <errno.h> /* errno, EINTR */
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#include <error.h>
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#include <sys/types.h> /* size_t, ssize_t, pid_t, DIR, struct
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dirent */
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#include <stddef.h> /* NULL */
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#include <string.h> /* strlen(), memcmp() */
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#include <stdio.h> /* asprintf(), perror() */
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#include <stdio.h> /* asprintf()*/
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#include <unistd.h> /* close(), write(), readlink(),
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read(), STDOUT_FILENO, sleep(),
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fork(), setuid(), geteuid(),
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setsid(), chdir(), dup2(),
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STDERR_FILENO, execv() */
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#include <stdlib.h> /* free(), EXIT_FAILURE, realloc(),
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EXIT_SUCCESS, malloc(), _exit() */
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#include <stdlib.h> /* getenv() */
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EXIT_SUCCESS, malloc(), _exit(),
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getenv() */
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#include <dirent.h> /* opendir(), readdir(), closedir() */
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#include <inttypes.h> /* intmax_t, strtoimax() */
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#include <sys/stat.h> /* struct stat, lstat(), S_ISLNK */
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size_t cmdline_len = 0;
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DIR *proc_dir = opendir("/proc");
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if(proc_dir == NULL){
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perror("opendir");
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error(0, errno, "opendir");
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return -1;
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}
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errno = 0;
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char *exe_link;
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ret = asprintf(&exe_link, "/proc/%s/exe", proc_ent->d_name);
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if(ret == -1){
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perror("asprintf");
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error(0, errno, "asprintf");
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goto fail_find_usplash;
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}
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free(exe_link);
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continue;
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}
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perror("lstat");
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error(0, errno, "lstat");
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free(exe_link);
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goto fail_find_usplash;
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}
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ret = asprintf(&cmdline_filename, "/proc/%s/cmdline",
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proc_ent->d_name);
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if(ret == -1){
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perror("asprintf");
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error(0, errno, "asprintf");
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goto fail_find_usplash;
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}
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cl_fd = open(cmdline_filename, O_RDONLY);
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free(cmdline_filename);
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if(cl_fd == -1){
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perror("open");
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error(0, errno, "open");
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goto fail_find_usplash;
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}
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}
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if(cmdline_len + blocksize > cmdline_allocated){
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tmp = realloc(cmdline, cmdline_allocated + blocksize);
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if(tmp == NULL){
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perror("realloc");
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error(0, errno, "realloc");
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close(cl_fd);
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goto fail_find_usplash;
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}
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sret = read(cl_fd, cmdline + cmdline_len,
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cmdline_allocated - cmdline_len);
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if(sret == -1){
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perror("read");
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error(0, errno, "read");
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close(cl_fd);
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goto fail_find_usplash;
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}
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} while(sret != 0);
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ret = close(cl_fd);
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if(ret == -1){
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perror("close");
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error(0, errno, "close");
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goto fail_find_usplash;
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}
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}
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/* Close directory */
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ret = closedir(proc_dir);
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if(ret == -1){
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perror("closedir");
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error(0, errno, "closedir");
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goto fail_find_usplash;
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}
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/* Success */
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sigemptyset(&new_action.sa_mask);
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ret = sigaddset(&new_action.sa_mask, SIGINT);
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if(ret == -1){
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perror("sigaddset");
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error(0, errno, "sigaddset");
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status = EX_OSERR;
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goto failure;
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}
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ret = sigaddset(&new_action.sa_mask, SIGHUP);
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if(ret == -1){
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perror("sigaddset");
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error(0, errno, "sigaddset");
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status = EX_OSERR;
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goto failure;
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}
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ret = sigaddset(&new_action.sa_mask, SIGTERM);
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if(ret == -1){
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perror("sigaddset");
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error(0, errno, "sigaddset");
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status = EX_OSERR;
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goto failure;
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}
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ret = sigaction(SIGINT, NULL, &old_action);
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if(ret == -1){
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if(errno != EINTR){
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perror("sigaction");
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error(0, errno, "sigaction");
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status = EX_OSERR;
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}
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goto failure;
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ret = sigaction(SIGINT, &new_action, NULL);
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if(ret == -1){
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if(errno != EINTR){
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perror("sigaction");
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error(0, errno, "sigaction");
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status = EX_OSERR;
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}
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goto failure;
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ret = sigaction(SIGHUP, NULL, &old_action);
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if(ret == -1){
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if(errno != EINTR){
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perror("sigaction");
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error(0, errno, "sigaction");
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status = EX_OSERR;
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}
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goto failure;
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ret = sigaction(SIGHUP, &new_action, NULL);
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if(ret == -1){
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if(errno != EINTR){
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perror("sigaction");
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error(0, errno, "sigaction");
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status = EX_OSERR;
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}
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goto failure;
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ret = sigaction(SIGTERM, NULL, &old_action);
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if(ret == -1){
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if(errno != EINTR){
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perror("sigaction");
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error(0, errno, "sigaction");
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status = EX_OSERR;
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}
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goto failure;
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ret = sigaction(SIGTERM, &new_action, NULL);
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if(ret == -1){
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if(errno != EINTR){
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perror("sigaction");
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error(0, errno, "sigaction");
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status = EX_OSERR;
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}
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goto failure;
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/* Write command to FIFO */
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if(not usplash_write(&fifo_fd, "TIMEOUT", "0")){
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if(errno != EINTR){
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perror("usplash_write");
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error(0, errno, "usplash_write");
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status = EX_OSERR;
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}
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goto failure;
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if(not usplash_write(&fifo_fd, "INPUTQUIET", prompt)){
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if(errno != EINTR){
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perror("usplash_write");
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error(0, errno, "usplash_write");
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status = EX_OSERR;
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}
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goto failure;
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outfifo_fd = open("/dev/.initramfs/usplash_outfifo", O_RDONLY);
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if(outfifo_fd == -1){
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if(errno != EINTR){
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perror("open");
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error(0, errno, "open");
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status = EX_OSERR;
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}
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goto failure;
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char *tmp = realloc(buf, buf_allocated + blocksize);
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if(tmp == NULL){
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if(errno != EINTR){
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perror("realloc");
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error(0, errno, "realloc");
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status = EX_OSERR;
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}
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goto failure;
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buf_allocated - buf_len);
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if(sret == -1){
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if(errno != EINTR){
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perror("read");
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error(0, errno, "read");
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status = EX_OSERR;
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}
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TEMP_FAILURE_RETRY(close(outfifo_fd));
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ret = close(outfifo_fd);
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if(ret == -1){
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if(errno != EINTR){
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perror("close");
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error(0, errno, "close");
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status = EX_OSERR;
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}
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goto failure;
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if(not usplash_write(&fifo_fd, "TIMEOUT", "15")){
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if(errno != EINTR){
491
perror("usplash_write");
492
error(0, errno, "usplash_write");
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status = EX_OSERR;
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}
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goto failure;
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ret = close(fifo_fd);
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503
if(ret == -1){
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if(errno != EINTR){
504
perror("close");
505
error(0, errno, "close");
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status = EX_OSERR;
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507
}
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goto failure;
515
516
sret = write(STDOUT_FILENO, buf + written, buf_len - written);
516
517
if(sret == -1){
517
518
if(errno != EINTR){
518
perror("write");
519
error(0, errno, "write");
519
520
status = EX_OSERR;
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521
}
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522
goto failure;
552
553
if(fifo_fd != -1){
553
554
ret = (int)TEMP_FAILURE_RETRY(close(fifo_fd));
554
555
if(ret == -1 and errno != EINTR){
555
perror("close");
556
error(0, errno, "close");
556
557
}
557
558
fifo_fd = -1;
558
559
}
561
562
if(outfifo_fd != -1){
562
563
ret = (int)TEMP_FAILURE_RETRY(close(outfifo_fd));
563
564
if(ret == -1){
564
perror("close");
565
error(0, errno, "close");
565
566
}
566
567
}
567
568
575
576
(sizeof(char *)
576
577
* (size_t)(cmdline_argc + 2)));
577
578
if(tmp == NULL){
578
perror("realloc");
579
error(0, errno, "realloc");
579
580
free(cmdline_argv);
580
581
return status;
581
582
}
602
603
the real user ID (_mandos) */
603
604
ret = setuid(geteuid());
604
605
if(ret == -1){
605
perror("setuid");
606
error(0, errno, "setuid");
606
607
}
607
608
608
609
setsid();
609
610
ret = chdir("/");
611
if(ret == -1){
612
error(0, errno, "chdir");
613
_exit(EX_OSERR);
614
}
610
615
/* if(fork() != 0){ */
611
616
/* _exit(EXIT_SUCCESS); */
612
617
/* } */
613
618
ret = dup2(STDERR_FILENO, STDOUT_FILENO); /* replace our stdout */
614
619
if(ret == -1){
615
perror("dup2");
620
error(0, errno, "dup2");
616
621
_exit(EX_OSERR);
617
622
}
618
623
619
624
execv(usplash_name, cmdline_argv);
620
625
if(not interrupted_by_signal){
621
perror("execv");
626
error(0, errno, "execv");
622
627
}
623
628
free(cmdline);
624
629
free(cmdline_argv);
629
634
sleep(2);
630
635
if(not usplash_write(&fifo_fd, "PULSATE", NULL)){
631
636
if(errno != EINTR){
632
perror("usplash_write");
637
error(0, errno, "usplash_write");
633
638
}
634
639
}
635
640
637
642
if(fifo_fd != -1){
638
643
ret = (int)TEMP_FAILURE_RETRY(close(fifo_fd));
639
644
if(ret == -1 and errno != EINTR){
640
perror("close");
645
error(0, errno, "close");
641
646
}
642
647
fifo_fd = -1;
643
648
}
648
653
ret = (int)TEMP_FAILURE_RETRY(sigaction(signal_received,
649
654
&signal_action, NULL));
650
655
if(ret == -1){
651
perror("sigaction");
656
error(0, errno, "sigaction");
652
657
}
653
658
do {
654
659
ret = raise(signal_received);
655
660
} while(ret != 0 and errno == EINTR);
656
661
if(ret != 0){
657
perror("raise");
662
error(0, errno, "raise");
658
663
abort();
659
664
}
660
665
TEMP_FAILURE_RETRY(pause());
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