75 lines
2.1 KiB
Diff
75 lines
2.1 KiB
Diff
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commit 42dda89dcb0407f6799dbfd0b9dab1529666ad51
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Author: Adhemerval Zanella <adhemerval.zanella@linaro.org>
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Date: Fri Dec 11 15:23:05 2020 -0300
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posix: Fix return value of system if shell can not be executed [BZ #27053]
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POSIX states that system returned code for failure to execute the shell
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shall be as if the shell had terminated using _exit(127). This
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behaviour was removed with 5fb7fc96350575.
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Checked on x86_64-linux-gnu.
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diff --git a/stdlib/tst-system.c b/stdlib/tst-system.c
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index 194e09828dd5c206..8681584f15ef3b47 100644
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--- a/stdlib/tst-system.c
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+++ b/stdlib/tst-system.c
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@@ -26,6 +26,7 @@
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#include <support/check.h>
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#include <support/temp_file.h>
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#include <support/support.h>
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+#include <support/xunistd.h>
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static char *tmpdir;
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static long int namemax;
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@@ -138,6 +139,22 @@ do_test (void)
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support_capture_subprocess_check (&result, "system", 0, sc_allow_none);
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}
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+ {
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+ struct stat64 st;
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+ xstat (_PATH_BSHELL, &st);
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+ mode_t mode = st.st_mode;
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+ xchmod (_PATH_BSHELL, mode & ~(S_IXUSR | S_IXGRP | S_IXOTH));
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+
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+ struct support_capture_subprocess result;
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+ result = support_capture_subprocess (call_system,
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+ &(struct args) {
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+ "exit 1", 127, 0
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+ });
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+ support_capture_subprocess_check (&result, "system", 0, sc_allow_none);
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+
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+ xchmod (_PATH_BSHELL, st.st_mode);
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+ }
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+
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TEST_COMPARE (system (""), 0);
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return 0;
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diff --git a/support/Makefile b/support/Makefile
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index 4875f52495ef292d..09b41b0d57e9239a 100644
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--- a/support/Makefile
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+++ b/support/Makefile
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@@ -86,6 +86,7 @@ libsupport-routines = \
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xchroot \
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xclone \
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xclose \
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+ xchmod \
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xconnect \
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xcopy_file_range \
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xdlfcn \
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diff --git a/sysdeps/posix/system.c b/sysdeps/posix/system.c
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index 7db09a05c3fbca43..047ded4badfddcab 100644
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--- a/sysdeps/posix/system.c
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+++ b/sysdeps/posix/system.c
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@@ -171,6 +171,10 @@ do_system (const char *line)
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__libc_cleanup_region_end (0);
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#endif
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}
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+ else
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+ /* POSIX states that failure to execute the shell should return
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+ as if the shell had terminated using _exit(127). */
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+ status = W_EXITCODE (127, 0);
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DO_LOCK ();
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if (SUB_REF () == 0)
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