From 5efe241eac80bb534fed0a965684c2d7527af5bf Mon Sep 17 00:00:00 2001 From: "Eric W. Biederman" Date: Thu, 26 Apr 2012 01:51:32 -0700 Subject: kconfig: Add error handling to KCONFIG_ALLCONFIG - Only try to read the file specified if KCONFIG_ALL_CONFIG is set to something other than the empty string or "1". - Don't use stat to check the name passed to conf_read_simple so that zconf_fopen can find the file in the current directory or in SRCTREE removing a extremely source of confusing failure, where KCONFIG_ALL_CONFIG was not interpreted with respect to the directory make was called in. - If conf_read_simple fails complain clearly and stop processing. Allowing the simple debugging of typos. - Clearly document the behavior so it is clear to users which values are treated as flags and which values are treated as filenames. Signed-off-by: Eric W. Biederman Signed-off-by: Michal Marek --- scripts/kconfig/conf.c | 20 ++++++++++++++------ 1 file changed, 14 insertions(+), 6 deletions(-) (limited to 'scripts/kconfig') diff --git a/scripts/kconfig/conf.c b/scripts/kconfig/conf.c index f208f900ed3..0fdda916930 100644 --- a/scripts/kconfig/conf.c +++ b/scripts/kconfig/conf.c @@ -574,8 +574,13 @@ int main(int ac, char **av) case alldefconfig: case randconfig: name = getenv("KCONFIG_ALLCONFIG"); - if (name && !stat(name, &tmpstat)) { - conf_read_simple(name, S_DEF_USER); + if (name && (strcmp(name, "") != 0) && (strcmp(name, "1") != 0)) { + if (conf_read_simple(name, S_DEF_USER)) { + fprintf(stderr, + _("*** Can't read seed configuration \"%s\"!\n"), + name); + exit(1); + } break; } switch (input_mode) { @@ -586,10 +591,13 @@ int main(int ac, char **av) case randconfig: name = "allrandom.config"; break; default: break; } - if (!stat(name, &tmpstat)) - conf_read_simple(name, S_DEF_USER); - else if (!stat("all.config", &tmpstat)) - conf_read_simple("all.config", S_DEF_USER); + if (conf_read_simple(name, S_DEF_USER) && + conf_read_simple("all.config", S_DEF_USER)) { + fprintf(stderr, + _("*** KCONFIG_ALLCONFIG set, but no \"%s\" or \"all.config\" file found\n"), + name); + exit(1); + } break; default: break; -- cgit v1.2.3 From 9f420bf0f4a74e404b73b42b7fc3c85c20c64ea7 Mon Sep 17 00:00:00 2001 From: "Eric W. Biederman" Date: Mon, 7 May 2012 05:37:45 -0700 Subject: kbuild: all{no,yes,mod,def,rand}config only read files when instructed to. Prevent subtle surprises to both people working on the kconfig code and people using make allnoconfig allyesconfig allmoconfig and randconfig by only attempting to read a config file if KCONFIG_ALLCONFIG is set. Common sense suggests attempting to read the extra config files does not make sense unless requested. The documentation says the code won't attempt to read the extra config files unless requested. Current usage does not appear to include people depending on the code reading the config files without the variable being set So do the simple thing and stop reading config files when passed all{no,yes,mod,def,rand}config unless KCONFIG_ALLCONFIG environment variable is set. Signed-off-by: Eric W. Biederman Reported-by: Stephen Rothwell Signed-off-by: Michal Marek --- scripts/kconfig/conf.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) (limited to 'scripts/kconfig') diff --git a/scripts/kconfig/conf.c b/scripts/kconfig/conf.c index 0fdda916930..0dc4a2c779b 100644 --- a/scripts/kconfig/conf.c +++ b/scripts/kconfig/conf.c @@ -574,7 +574,9 @@ int main(int ac, char **av) case alldefconfig: case randconfig: name = getenv("KCONFIG_ALLCONFIG"); - if (name && (strcmp(name, "") != 0) && (strcmp(name, "1") != 0)) { + if (!name) + break; + if ((strcmp(name, "") != 0) && (strcmp(name, "1") != 0)) { if (conf_read_simple(name, S_DEF_USER)) { fprintf(stderr, _("*** Can't read seed configuration \"%s\"!\n"), -- cgit v1.2.3