pd.if.org Git - zpackage/blob - zpm-quote.c

   1 #define _POSIX_C_SOURCE 2
   2
   3 #include <stdlib.h>
   4 #include <stdio.h>
   5 #include <string.h>
   6 #include <unistd.h>
   7
   8 /* for quoting against the shell replace ' with '\'' and surround with
   9  * single quotes
  10  */
  11
  12 char *quote(char *s, int chi, char *repl, int addquotes) {
  13         size_t size = 0, rsize = 0;
  14         char *d, *q, *r;
  15         char ch = chi;
  16
  17         if (!s) return NULL;
  18         if (!repl) return NULL;
  19
  20         rsize = strlen(repl);
  21
  22         for (d = s; *d; d++) {
  23                 if (*d == ch) {
  24                         size += rsize-1;
  25                 }
  26                 size++;
  27         }
  28
  29         if (addquotes) {
  30                 size += 2;
  31         }
  32
  33         d = q = malloc(size+1);
  34
  35         if (q) {
  36                 if (addquotes) {
  37                         *d++ = ch;
  38                 }
  39
  40                 while (*s) {
  41                         if (*s == ch) {
  42                                 r = repl;
  43                                 while (*r) {
  44                                         *d++ = *r++;
  45                                 }
  46                                 s++;
  47                         } else {
  48                                 *d++ = *s++;
  49                         }
  50                         *d = 0;
  51                 }
  52
  53                 if (addquotes) {
  54                         *d++ = ch;
  55                 }
  56                 *d = 0;
  57         }
  58
  59         return q;
  60 }
  61
  62 int main(int ac, char **av) {
  63         char *quoted;
  64         int i;
  65         int ch = '\'';
  66         int opt, shellmode = 0, addquotes = 0, ident = 0;
  67         char *repl = "''";
  68         int count = 0;
  69         char *separator = "\n";
  70
  71         while ((opt = getopt(ac, av, "sqid:")) != -1) {
  72                 switch (opt) {
  73                         case 's': shellmode = 1; break;
  74                         case 'q': addquotes = 1; break;
  75                         case 'i': ident = 1; break;
  76                         case 'd': separator = optarg; break;
  77                         default:
  78                                   exit(EXIT_FAILURE);
  79                                   break;
  80                 }
  81         }
  82         int argn = optind;
  83
  84         if (shellmode) {
  85                 repl = "'\\''";
  86         } else if (ident) {
  87                 ch = '"';
  88                 repl = "\"\"";
  89         }
  90
  91         count = 0;
  92         for (i=argn;i<ac;i++) {
  93                 quoted = quote(av[i], ch, repl, addquotes);
  94                 printf("%s%s", count > 0 ? separator : "", quoted);
  95                 free(quoted);
  96                 count++;
  97         }
  98         if (count > 0) {
  99                 printf("\n");
 100         }
 101         return 0;
 102 }