3da5572bfa
function old new delta time_main 1052 1285 +233 crontab_main 623 856 +233 ifupdown_main 2202 2403 +201 xvfork - 20 +20 passwd_main 1049 1053 +4 grave 1068 1066 -2 script_main 935 921 -14 vfork_or_die 20 - -20 vfork_compressor 206 175 -31 open_as_user 109 - -109 popen2 218 - -218 edit_file 910 690 -220 run_command 268 - -268 ------------------------------------------------------------------------------ (add/remove: 1/4 grow/shrink: 4/4 up/down: 691/-882) Total: -191 bytes
66 lines
1.5 KiB
C
66 lines
1.5 KiB
C
/* vi: set sw=4 ts=4: */
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/*
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* Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
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*/
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#include "libbb.h"
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#include "unarchive.h"
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/* transformer(), more than meets the eye */
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/*
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* On MMU machine, the transform_prog is removed by macro magic
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* in include/unarchive.h. On NOMMU, transformer is removed.
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*/
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int FAST_FUNC open_transformer(int src_fd,
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USE_DESKTOP(long long) int FAST_FUNC (*transformer)(int src_fd, int dst_fd),
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const char *transform_prog)
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{
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struct fd_pair fd_pipe;
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int pid;
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xpiped_pair(fd_pipe);
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#if BB_MMU
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pid = fork();
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if (pid == -1)
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bb_perror_msg_and_die("can't fork");
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#else
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pid = xvfork();
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#endif
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if (pid == 0) {
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/* child process */
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close(fd_pipe.rd); /* We don't want to read from the parent */
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// FIXME: error check?
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#if BB_MMU
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transformer(src_fd, fd_pipe.wr);
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if (ENABLE_FEATURE_CLEAN_UP) {
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close(fd_pipe.wr); /* Send EOF */
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close(src_fd);
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}
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/* must be _exit! bug was actually seen here */
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_exit(EXIT_SUCCESS);
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#else
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{
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char *argv[4];
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xmove_fd(src_fd, 0);
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xmove_fd(fd_pipe.wr, 1);
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argv[0] = (char*)transform_prog;
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argv[1] = (char*)"-cf";
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argv[2] = (char*)"-";
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argv[3] = NULL;
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BB_EXECVP(transform_prog, argv);
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bb_perror_msg_and_die("can't exec %s", transform_prog);
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}
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#endif
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/* notreached */
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}
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/* parent process */
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close(fd_pipe.wr); /* Don't want to write to the child */
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//TODO: get rid of return value (become void)?
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xmove_fd(fd_pipe.rd, src_fd);
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return src_fd;
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}
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