Andrew's git - gitweb.git/blob

   1/*
   2 * ident.c
   3 *
   4 * create git identifier lines of the form "name <email> date"
   5 *
   6 * Copyright (C) 2005 Linus Torvalds
   7 */
   8#include "cache.h"
   9
  10#include <pwd.h>
  11#include <time.h>
  12#include <ctype.h>
  13
  14static char real_email[1000];
  15static char real_name[1000];
  16static char real_date[50];
  17
  18int setup_ident(void)
  19{
  20        int len;
  21        struct passwd *pw = getpwuid(getuid());
  22
  23        if (!pw)
  24                die("You don't exist. Go away!");
  25
  26        /* Get the name ("gecos") */
  27        len = strlen(pw->pw_gecos);
  28        if (len >= sizeof(real_name))
  29                die("Your parents must have hated you!");
  30        memcpy(real_name, pw->pw_gecos, len+1);
  31
  32        /* Make up a fake email address (name + '@' + hostname [+ '.' + domainname]) */
  33        len = strlen(pw->pw_name);
  34        if (len > sizeof(real_email)/2)
  35                die("Your sysadmin must hate you!");
  36        memcpy(real_email, pw->pw_name, len);
  37        real_email[len++] = '@';
  38        gethostname(real_email + len, sizeof(real_email) - len);
  39        if (!strchr(real_email+len, '.')) {
  40                len = strlen(real_email);
  41                real_email[len++] = '.';
  42                getdomainname(real_email+len, sizeof(real_email)-len);
  43        }
  44        /* And set the default date */
  45        datestamp(real_date, sizeof(real_date));
  46        return 0;
  47}
  48
  49static int add_raw(char *buf, int size, int offset, const char *str)
  50{
  51        int len = strlen(str);
  52        if (offset + len > size)
  53                return size;
  54        memcpy(buf + offset, str, len);
  55        return offset + len;
  56}
  57
  58static int crud(unsigned char c)
  59{
  60        static char crud_array[256];
  61        static int crud_array_initialized = 0;
  62
  63        if (!crud_array_initialized) {
  64                int k;
  65
  66                for (k = 0; k <= 31; ++k) crud_array[k] = 1;
  67                crud_array[' '] = 1;
  68                crud_array['.'] = 1;
  69                crud_array[','] = 1;
  70                crud_array[':'] = 1;
  71                crud_array[';'] = 1;
  72                crud_array['<'] = 1;
  73                crud_array['>'] = 1;
  74                crud_array['"'] = 1;
  75                crud_array['\''] = 1;
  76                crud_array_initialized = 1;
  77        }
  78        return crud_array[c];
  79}
  80
  81/*
  82 * Copy over a string to the destination, but avoid special
  83 * characters ('\n', '<' and '>') and remove crud at the end
  84 */
  85static int copy(char *buf, int size, int offset, const char *src)
  86{
  87        int i, len;
  88        unsigned char c;
  89
  90        /* Remove crud from the beginning.. */
  91        while ((c = *src) != 0) {
  92                if (!crud(c))
  93                        break;
  94                src++;
  95        }
  96
  97        /* Remove crud from the end.. */
  98        len = strlen(src);
  99        while (len > 0) {
 100                c = src[len-1];
 101                if (!crud(c))
 102                        break;
 103                --len;
 104        }
 105
 106        /*
 107         * Copy the rest to the buffer, but avoid the special
 108         * characters '\n' '<' and '>' that act as delimeters on
 109         * a identification line
 110         */
 111        for (i = 0; i < len; i++) {
 112                c = *src++;
 113                switch (c) {
 114                case '\n': case '<': case '>':
 115                        continue;
 116                }
 117                if (offset >= size)
 118                        return size;
 119                buf[offset++] = c;
 120        }
 121        return offset;
 122}
 123
 124char *get_ident(const char *name, const char *email, const char *date_str)
 125{
 126        static char buffer[1000];
 127        char date[50];
 128        int i;
 129
 130        if (!name)
 131                name = real_name;
 132        if (!email)
 133                email = real_email;
 134        strcpy(date, real_date);
 135        if (date_str)
 136                parse_date(date_str, date, sizeof(date));
 137
 138        i = copy(buffer, sizeof(buffer), 0, name);
 139        i = add_raw(buffer, sizeof(buffer), i, " <");
 140        i = copy(buffer, sizeof(buffer), i, email);
 141        i = add_raw(buffer, sizeof(buffer), i, "> ");
 142        i = copy(buffer, sizeof(buffer), i, date);
 143        if (i >= sizeof(buffer))
 144                die("Impossibly long personal identifier");
 145        buffer[i] = 0;
 146        return buffer;
 147}
 148
 149char *git_author_info(void)
 150{
 151        return get_ident(getenv("GIT_AUTHOR_NAME"), getenv("GIT_AUTHOR_EMAIL"), getenv("GIT_AUTHOR_DATE"));
 152}
 153
 154char *git_committer_info(void)
 155{
 156        return get_ident(getenv("GIT_COMMITTER_NAME"), getenv("GIT_COMMITTER_EMAIL"), getenv("GIT_COMMITTER_DATE"));
 157}