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author | Masahiro Yamada <masahiroy@kernel.org> | 2021-10-01 08:32:51 +0300 |
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committer | Masahiro Yamada <masahiroy@kernel.org> | 2021-10-11 17:13:23 +0300 |
commit | 00d674cb35362dd30df7ff1e0003ad6d6c3ebf3a (patch) | |
tree | e7179188ca497e9a178babffc035f796063e42ec /scripts | |
parent | 57ddd07c456053dfdabebc6a2d030c57cd3fb75b (diff) | |
download | linux-00d674cb35362dd30df7ff1e0003ad6d6c3ebf3a.tar.xz |
kconfig: refactor conf_write_dep()
The if ... else inside the for-loop is unneeded because one empty
line is placed after printing the last element of deps_config.
Currently, all errors in conf_write_dep() are ignored. Add proper
error checks.
Rename it to conf_write_autoconf_cmd(), which is more intuitive.
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Diffstat (limited to 'scripts')
-rw-r--r-- | scripts/kconfig/confdata.c | 54 |
1 files changed, 37 insertions, 17 deletions
diff --git a/scripts/kconfig/confdata.c b/scripts/kconfig/confdata.c index 7301f4b2f4d5..6ac53bf7aa64 100644 --- a/scripts/kconfig/confdata.c +++ b/scripts/kconfig/confdata.c @@ -957,32 +957,50 @@ next: } /* write a dependency file as used by kbuild to track dependencies */ -static int conf_write_dep(const char *name) +static int conf_write_autoconf_cmd(const char *autoconf_name) { + char name[PATH_MAX], tmp[PATH_MAX]; struct file *file; FILE *out; + int ret; - out = fopen("..config.tmp", "w"); - if (!out) - return 1; - fprintf(out, "deps_config := \\\n"); - for (file = file_list; file; file = file->next) { - if (file->next) - fprintf(out, "\t%s \\\n", file->name); - else - fprintf(out, "\t%s\n", file->name); + ret = snprintf(name, sizeof(name), "%s.cmd", autoconf_name); + if (ret >= sizeof(name)) /* check truncation */ + return -1; + + if (make_parent_dir(name)) + return -1; + + ret = snprintf(tmp, sizeof(tmp), "%s.cmd.tmp", autoconf_name); + if (ret >= sizeof(tmp)) /* check truncation */ + return -1; + + out = fopen(tmp, "w"); + if (!out) { + perror("fopen"); + return -1; } - fprintf(out, "\n%s: \\\n" - "\t$(deps_config)\n\n", conf_get_autoconfig_name()); - env_write_dep(out, conf_get_autoconfig_name()); + fprintf(out, "deps_config := \\\n"); + for (file = file_list; file; file = file->next) + fprintf(out, "\t%s \\\n", file->name); + + fprintf(out, "\n%s: $(deps_config)\n\n", autoconf_name); + + env_write_dep(out, autoconf_name); fprintf(out, "\n$(deps_config): ;\n"); + + if (ferror(out)) /* error check for all fprintf() calls */ + return -1; + fclose(out); - if (make_parent_dir(name)) - return 1; - rename("..config.tmp", name); + if (rename(tmp, name)) { + perror("rename"); + return -1; + } + return 0; } @@ -1109,7 +1127,9 @@ int conf_write_autoconf(int overwrite) if (!overwrite && is_present(autoconf_name)) return 0; - conf_write_dep("include/config/auto.conf.cmd"); + ret = conf_write_autoconf_cmd(autoconf_name); + if (ret) + return -1; if (conf_touch_deps()) return 1; |