git.ozlabs.org Git - petitboot/blob - discover/kboot-parser.c

   1 #define _GNU_SOURCE
   2
   3 #include <assert.h>
   4 #include <stdlib.h>
   5 #include <string.h>
   6
   7 #include "log/log.h"
   8 #include "talloc/talloc.h"
   9 #include "pb-protocol/pb-protocol.h"
  10 #include "parser-conf.h"
  11 #include "parser-utils.h"
  12 #include "paths.h"
  13
  14 static void kboot_process_pair(struct conf_context *conf, const char *name,
  15                 char *value)
  16 {
  17         const char *const *ignored_names = conf->parser_info;
  18         char *pos;
  19         char *args;
  20         const char *initrd;
  21         const char *root;
  22         struct boot_option *opt;
  23
  24         /* fixup for bare values */
  25
  26         if (!name)
  27                 return;
  28
  29         if (conf_param_in_list(ignored_names, name))
  30                 return;
  31
  32         if (conf_set_global_option(conf, name, value))
  33                 return;
  34
  35         /* opt must be associated with dc */
  36
  37         opt = talloc_zero(conf->dc->device, struct boot_option);
  38
  39         if (!opt)
  40                 return;
  41
  42         opt->id = talloc_asprintf(opt, "%s#%s", conf->dc->device->id, name);
  43         opt->name = talloc_strdup(opt, name);
  44
  45         args = talloc_strdup(opt, "");
  46         initrd = conf_get_global_option(conf, "initrd");
  47         root = conf_get_global_option(conf, "root");
  48
  49         pos = strchr(value, ' ');
  50
  51         /* if there's no space, it's only a kernel image with no params */
  52
  53         if (!pos)
  54                 goto out_add;
  55         *pos = 0;
  56
  57         for (pos++; pos;) {
  58                 char *cl_name, *cl_value;
  59
  60                 pos = conf_get_param_pair(pos, &cl_name, &cl_value, ' ');
  61
  62                 if (!cl_name) {
  63                         args = talloc_asprintf_append(args, "%s ", cl_value);
  64                         continue;
  65                 }
  66
  67                 if (streq(cl_name, "initrd")) {
  68                         initrd = cl_value;
  69                         continue;
  70                 }
  71
  72                 if (streq(cl_name, "root")) {
  73                         root = cl_value;
  74                         continue;
  75                 }
  76
  77                 args = talloc_asprintf_append(args, "%s=%s ", cl_name,
  78                         cl_value);
  79         }
  80
  81 out_add:
  82         opt->boot_image_file = resolve_path(opt, value, conf->dc->device_path);
  83
  84         if (root) {
  85                 opt->boot_args = talloc_asprintf(opt, "root=%s %s", root, args);
  86                 talloc_free(args);
  87         } else
  88                 opt->boot_args = args;
  89
  90         if (initrd) {
  91                 opt->initrd_file = resolve_path(opt, initrd,
  92                                 conf->dc->device_path);
  93
  94                 opt->description = talloc_asprintf(opt, "%s initrd=%s %s",
  95                         value, initrd, opt->boot_args);
  96         } else
  97                 opt->description = talloc_asprintf(opt, "%s %s", value,
  98                         opt->boot_args);
  99
 100         conf_strip_str(opt->boot_args);
 101         conf_strip_str(opt->description);
 102
 103         device_add_boot_option(conf->dc->device, opt);
 104 }
 105
 106 static struct conf_global_option kboot_global_options[] = {
 107         { .name = "initrd" },
 108         { .name = "root" },
 109         { .name = "video" },
 110         { .name = NULL }
 111 };
 112
 113 static const char *const kboot_conf_files[] = {
 114         "/kboot.conf",
 115         "/kboot.cnf",
 116         "/etc/kboot.conf",
 117         "/etc/kboot.cnf",
 118         "/KBOOT.CONF",
 119         "/KBOOT.CNF",
 120         "/ETC/KBOOT.CONF",
 121         "/ETC/KBOOT.CNF",
 122         NULL
 123 };
 124
 125 static const char *const kboot_ignored_names[] = {
 126         "default",
 127         "delay",
 128         "message",
 129         "timeout",
 130         NULL
 131 };
 132
 133 static int kboot_parse(struct discover_context *dc)
 134 {
 135         struct conf_context *conf;
 136         int rc;
 137
 138         conf = talloc_zero(dc, struct conf_context);
 139
 140         if (!conf)
 141                 return 0;
 142
 143         conf->dc = dc;
 144         conf->global_options = kboot_global_options,
 145         conf_init_global_options(conf);
 146         conf->conf_files = kboot_conf_files,
 147         conf->process_pair = kboot_process_pair;
 148         conf->parser_info = (void *)kboot_ignored_names,
 149
 150         rc = conf_parse(conf);
 151
 152         talloc_free(conf);
 153         return rc;
 154 }
 155
 156 define_parser(kboot, kboot_parse);