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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-06 02:25:50 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-06 02:25:50 +0000 |
commit | 19f4f86bfed21c5326ed2acebe1163f3a83e832b (patch) | |
tree | d59b9989ce55ed23693e80974d94c856f1c2c8b1 /src/debug-generator/debug-generator.c | |
parent | Initial commit. (diff) | |
download | systemd-19f4f86bfed21c5326ed2acebe1163f3a83e832b.tar.xz systemd-19f4f86bfed21c5326ed2acebe1163f3a83e832b.zip |
Adding upstream version 241.upstream/241upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'src/debug-generator/debug-generator.c')
-rw-r--r-- | src/debug-generator/debug-generator.c | 165 |
1 files changed, 165 insertions, 0 deletions
diff --git a/src/debug-generator/debug-generator.c b/src/debug-generator/debug-generator.c new file mode 100644 index 0000000..fa4ca57 --- /dev/null +++ b/src/debug-generator/debug-generator.c @@ -0,0 +1,165 @@ +/* SPDX-License-Identifier: LGPL-2.1+ */ + +#include "alloc-util.h" +#include "generator.h" +#include "mkdir.h" +#include "parse-util.h" +#include "proc-cmdline.h" +#include "special.h" +#include "string-util.h" +#include "strv.h" +#include "unit-name.h" +#include "util.h" + +static const char *arg_dest = NULL; +static char *arg_default_unit = NULL; +static char **arg_mask = NULL; +static char **arg_wants = NULL; +static bool arg_debug_shell = false; + +STATIC_DESTRUCTOR_REGISTER(arg_default_unit, freep); +STATIC_DESTRUCTOR_REGISTER(arg_mask, strv_freep); +STATIC_DESTRUCTOR_REGISTER(arg_wants, strv_freep); + +static int parse_proc_cmdline_item(const char *key, const char *value, void *data) { + int r; + + assert(key); + + if (streq(key, "systemd.mask")) { + char *n; + + if (proc_cmdline_value_missing(key, value)) + return 0; + + r = unit_name_mangle(value, UNIT_NAME_MANGLE_WARN, &n); + if (r < 0) + return log_error_errno(r, "Failed to glob unit name: %m"); + + r = strv_consume(&arg_mask, n); + if (r < 0) + return log_oom(); + + } else if (streq(key, "systemd.wants")) { + char *n; + + if (proc_cmdline_value_missing(key, value)) + return 0; + + r = unit_name_mangle(value, UNIT_NAME_MANGLE_WARN, &n); + if (r < 0) + return log_error_errno(r, "Failed to glob unit name: %m"); + + r = strv_consume(&arg_wants, n); + if (r < 0) + return log_oom(); + + } else if (proc_cmdline_key_streq(key, "systemd.debug_shell")) { + + if (value) { + r = parse_boolean(value); + if (r < 0) + log_error("Failed to parse systemd.debug_shell= argument '%s', ignoring.", value); + else + arg_debug_shell = r; + } else + arg_debug_shell = true; + + } else if (streq(key, "systemd.unit")) { + + if (proc_cmdline_value_missing(key, value)) + return 0; + + r = free_and_strdup(&arg_default_unit, value); + if (r < 0) + return log_error_errno(r, "Failed to set default unit %s: %m", value); + + } else if (!value) { + const char *target; + + target = runlevel_to_target(key); + if (target) { + r = free_and_strdup(&arg_default_unit, target); + if (r < 0) + return log_error_errno(r, "Failed to set default unit %s: %m", target); + } + } + + return 0; +} + +static int generate_mask_symlinks(void) { + char **u; + int r = 0; + + if (strv_isempty(arg_mask)) + return 0; + + STRV_FOREACH(u, arg_mask) { + _cleanup_free_ char *p = NULL; + + p = strjoin(arg_dest, "/", *u); + if (!p) + return log_oom(); + + if (symlink("/dev/null", p) < 0) + r = log_error_errno(errno, + "Failed to create mask symlink %s: %m", + p); + } + + return r; +} + +static int generate_wants_symlinks(void) { + char **u; + int r = 0; + + if (strv_isempty(arg_wants)) + return 0; + + STRV_FOREACH(u, arg_wants) { + _cleanup_free_ char *p = NULL, *f = NULL; + const char *target = arg_default_unit ?: SPECIAL_DEFAULT_TARGET; + + p = strjoin(arg_dest, "/", target, ".wants/", *u); + if (!p) + return log_oom(); + + f = strappend(SYSTEM_DATA_UNIT_PATH "/", *u); + if (!f) + return log_oom(); + + mkdir_parents_label(p, 0755); + + if (symlink(f, p) < 0) + r = log_error_errno(errno, + "Failed to create wants symlink %s: %m", + p); + } + + return r; +} + +static int run(const char *dest, const char *dest_early, const char *dest_late) { + int r, q; + + assert_se(arg_dest = dest_early); + + r = proc_cmdline_parse(parse_proc_cmdline_item, NULL, PROC_CMDLINE_RD_STRICT | PROC_CMDLINE_STRIP_RD_PREFIX); + if (r < 0) + log_warning_errno(r, "Failed to parse kernel command line, ignoring: %m"); + + if (arg_debug_shell) { + r = strv_extend(&arg_wants, "debug-shell.service"); + if (r < 0) + return log_oom(); + } + + r = generate_mask_symlinks(); + q = generate_wants_symlinks(); + + return r < 0 ? r : q; +} + +DEFINE_MAIN_GENERATOR_FUNCTION(run); |