70ad448746
When we run a build script, redirect its standard input to a newly created pipe with no open writers. This makes the behaviour of build scripts more robust against e. g. unsolicited interactivity (esp. if inherited stdio points to a tty) and more reproducible.
53 lines
806 B
C
53 lines
806 B
C
#include <unistd.h>
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#include <errno.h>
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#ifdef __linux__
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#include <linux/limits.h>
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#endif
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int rpm_close_all (void)
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{
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int fd, max;
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max = sysconf (_SC_OPEN_MAX);
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if (max <= 0)
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return -1;
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#ifdef __linux__
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if (max < NR_OPEN)
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max = NR_OPEN;
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#endif
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for (fd = STDERR_FILENO + 1; fd < max; ++fd)
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{
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if (close (fd) && errno != EBADF)
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/*
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* Possible errors are:
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* EINTR: the close() call was interrupted by a signal;
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* EIO: an I/O error occurred.
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*/
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return -1;
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}
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return 0;
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}
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int rpm_nullify_input (int fdno) {
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int null_pipe[2];
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if (pipe(null_pipe) < 0) {
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return -1;
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}
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if (close(null_pipe[1] < 0)) {
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return -1;
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}
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if (null_pipe[0] != fdno) {
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if (dup2(null_pipe[0], fdno) != fdno) {
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return -1;
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}
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if (close(null_pipe[0]) < 0) {
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return -1;
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}
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}
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return 0;
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}
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