From b159c198c9160a8eb13254e2b631d0035b9b542c Mon Sep 17 00:00:00 2001 From: Craig Small Date: Sat, 9 Apr 2022 14:18:28 +1000 Subject: [PATCH] sysctl: print dotted keys again When the globbing update was put into sysctl, you could no longer simply use the keys because one key could potentially be multiple paths once the glob expansion occured. Using the path instead gave a unique output. Except certain programs, such as salt, expected the output to use the dotted path "kernel.hostname" and not "kernel/hostname". We can no longer use the original key, so now for each path: Copy the path strip off /proc/ convert all / to . The sysctl testsuite was also updated to check for a few different types of conversion failures. References: commit 6389deca5bf667f5fab5912acde78ba8e0febbc7 https://www.freelists.org/post/procps/some-procpsn4400-fixes,4 https://repo.saltproject.io/ Signed-off-by: Craig Small --- NEWS | 1 + sysctl.c | 28 ++++++++++++++++++-------- testsuite/sysctl.test/sysctl_write.exp | 14 ++++++++++--- testsuite/sysctl_slash_test.conf | 1 + 4 files changed, 33 insertions(+), 11 deletions(-) create mode 100644 testsuite/sysctl_slash_test.conf diff --git a/NEWS b/NEWS index 50297d7b..aef9c1a7 100644 --- a/NEWS +++ b/NEWS @@ -3,6 +3,7 @@ procps-ng-NEXT Re-add elogind support merge #151 * ps: threads again display when -L is used with -q issue #234 * ps: proper aix format string behavior was restored + * sysctl: print dotted keys again procps-ng-4.0.0 --------------- diff --git a/sysctl.c b/sysctl.c index 430f7591..c711692f 100644 --- a/sysctl.c +++ b/sysctl.c @@ -169,7 +169,7 @@ static SysctlSetting *setting_new( strcat(path + proc_len, key+1); else strcat(path + proc_len, key); - /* change . to / */ + /* change . to / for path */ slashdot(path + proc_len, '.', '/'); s = xmalloc(sizeof(SysctlSetting)); @@ -535,6 +535,7 @@ static int WriteSetting( int rc = EXIT_SUCCESS; FILE *fp; struct stat ts; + char *dotted_key; if (!key || !path) return rc; @@ -551,13 +552,22 @@ static int WriteSetting( return EXIT_FAILURE; } + /* Convert the globbed path into a dotted key */ + if ( (dotted_key = strdup(path + strlen(PROC_PATH))) == NULL) { + xerrx(EXIT_FAILURE, _("strdup key")); + return EXIT_FAILURE; + } + slashdot(dotted_key, '/', '.'); + if ((ts.st_mode & S_IWUSR) == 0) { - xwarn(_("setting key \"%s\""), key); + xwarn(_("setting key \"%s\""), dotted_key); + free(dotted_key); return rc; } if (S_ISDIR(ts.st_mode)) { - xwarn(_("setting key \"%s\""), key); + xwarn(_("setting key \"%s\""), dotted_key); + free(dotted_key); return rc; } @@ -567,7 +577,7 @@ static int WriteSetting( case ENOENT: if (!IgnoreError) { xwarnx(_("\"%s\" is an unknown key%s"), - key, (ignore_failure?_(", ignoring"):"")); + dotted_key, (ignore_failure?_(", ignoring"):"")); if (!ignore_failure) rc = EXIT_FAILURE; } @@ -576,11 +586,11 @@ static int WriteSetting( case EROFS: case EACCES: xwarnx(_("permission denied on key \"%s\"%s"), - key, (ignore_failure?_(", ignoring"):"")); + dotted_key, (ignore_failure?_(", ignoring"):"")); break; default: xwarn(_("setting key \"%s\"%s"), - key, (ignore_failure?_(", ignoring"):"")); + dotted_key, (ignore_failure?_(", ignoring"):"")); break; } if (!ignore_failure && errno != ENOENT) @@ -589,7 +599,8 @@ static int WriteSetting( if (0 < fprintf(fp, "%s\n", value)) rc = EXIT_SUCCESS; if (close_stream(fp) != 0) { - xwarn(_("setting key \"%s\""), path); + xwarn(_("setting key \"%s\""), dotted_key); + free(dotted_key); return EXIT_FAILURE; } } @@ -599,7 +610,7 @@ static int WriteSetting( printf("%s\n", value); } else { if (PrintName) { - printf("%s = %s\n", path, value); + printf("%s = %s\n", dotted_key, value); } else { if (PrintNewline) printf("%s\n", value); @@ -608,6 +619,7 @@ static int WriteSetting( } } } + free(dotted_key); return rc; } diff --git a/testsuite/sysctl.test/sysctl_write.exp b/testsuite/sysctl.test/sysctl_write.exp index bf0923f4..b6b94436 100644 --- a/testsuite/sysctl.test/sysctl_write.exp +++ b/testsuite/sysctl.test/sysctl_write.exp @@ -3,11 +3,19 @@ set sysctl ${topdir}sysctl set test "sysctl write from command line" spawn $sysctl --dry-run kernel.hostname=procps-test -expect_pass "$test" "/proc/sys/kernel/hostname = procps-test" +expect_pass "$test" "kernel.hostname = procps-test" + +set test "sysctl write from command line using slash" +spawn $sysctl --dry-run kernel/hostname=procps-test +expect_pass "$test" "kernel.hostname = procps-test" set test "sysctl write from configuration file" spawn $sysctl --dry-run -f ${topdir}testsuite/sysctl_glob_test.conf -expect_pass "$test" "/proc/sys/fs/protected_fifos = 2\\s+/proc/sys/fs/protected_symlinks = 2\\s+/proc/sys/fs/protected_hardlinks = 1" +expect_pass "$test" "fs.protected_fifos = 2\\s+fs.protected_symlinks = 2\\s+fs.protected_hardlinks = 1" + +set test "sysctl write from file with slashes" +spawn $sysctl --dry-run -f ${topdir}testsuite/sysctl_slash_test.conf +expect_pass "$test" "kernel.hostname = procps-test" set hostname_file "/proc/sys/kernel/hostname" if {[file exists ${hostname_file}]} { @@ -25,7 +33,7 @@ if {[file exists ${hostname_file}]} { expect_spawn_retval "$test" 0 } } else { - unsupported "sysctl write: hostname file doe not exist" + unsupported "sysctl write: hostname file does not exist" } set test "sysctl write above /proc" diff --git a/testsuite/sysctl_slash_test.conf b/testsuite/sysctl_slash_test.conf new file mode 100644 index 00000000..77e9b372 --- /dev/null +++ b/testsuite/sysctl_slash_test.conf @@ -0,0 +1 @@ +kernel/hostname = procps-test -- 2.40.0