kernel/tools/perf/util/alias.c

   1 #include "cache.h"
   2
   3 static const char *alias_key;
   4 static char *alias_val;
   5
   6 static int alias_lookup_cb(const char *k, const char *v,
   7                            void *cb __maybe_unused)
   8 {
   9         if (!prefixcmp(k, "alias.") && !strcmp(k+6, alias_key)) {
  10                 if (!v)
  11                         return config_error_nonbool(k);
  12                 alias_val = strdup(v);
  13                 return 0;
  14         }
  15         return 0;
  16 }
  17
  18 char *alias_lookup(const char *alias)
  19 {
  20         alias_key = alias;
  21         alias_val = NULL;
  22         perf_config(alias_lookup_cb, NULL);
  23         return alias_val;
  24 }
  25
  26 int split_cmdline(char *cmdline, const char ***argv)
  27 {
  28         int src, dst, count = 0, size = 16;
  29         char quoted = 0;
  30
  31         *argv = malloc(sizeof(char*) * size);
  32
  33         /* split alias_string */
  34         (*argv)[count++] = cmdline;
  35         for (src = dst = 0; cmdline[src];) {
  36                 char c = cmdline[src];
  37                 if (!quoted && isspace(c)) {
  38                         cmdline[dst++] = 0;
  39                         while (cmdline[++src]
  40                                         && isspace(cmdline[src]))
  41                                 ; /* skip */
  42                         if (count >= size) {
  43                                 size += 16;
  44                                 *argv = realloc(*argv, sizeof(char*) * size);
  45                         }
  46                         (*argv)[count++] = cmdline + dst;
  47                 } else if (!quoted && (c == '\'' || c == '"')) {
  48                         quoted = c;
  49                         src++;
  50                 } else if (c == quoted) {
  51                         quoted = 0;
  52                         src++;
  53                 } else {
  54                         if (c == '\\' && quoted != '\'') {
  55                                 src++;
  56                                 c = cmdline[src];
  57                                 if (!c) {
  58                                         zfree(argv);
  59                                         return error("cmdline ends with \\");
  60                                 }
  61                         }
  62                         cmdline[dst++] = c;
  63                         src++;
  64                 }
  65         }
  66
  67         cmdline[dst] = 0;
  68
  69         if (quoted) {
  70                 zfree(argv);
  71                 return error("unclosed quote");
  72         }
  73
  74         return count;
  75 }
  76