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
  45        /* And set the default date */
  46        datestamp(real_date, sizeof(real_date));
  47        return 0;
  48}
  49
  50static int add_raw(char *buf, int size, int offset, const char *str)
  51{
  52        int len = strlen(str);
  53        if (offset + len > size)
  54                return size;
  55        memcpy(buf + offset, str, len);
  56        return offset + len;
  57}
  58
  59static int crud(unsigned char c)
  60{
  61        static const char crud_array[256] = {
  62                [0 ... 31] = 1,
  63                [' '] = 1,
  64                ['.'] = 1, [','] = 1,
  65                [':'] = 1, [';'] = 1,
  66                ['<'] = 1, ['>'] = 1,
  67                ['"'] = 1, ['\''] = 1,
  68        };
  69        return crud_array[c];
  70}
  71
  72/*
  73 * Copy over a string to the destination, but avoid special
  74 * characters ('\n', '<' and '>') and remove crud at the end
  75 */
  76static int copy(char *buf, int size, int offset, const char *src)
  77{
  78        int i, len;
  79        unsigned char c;
  80
  81        /* Remove crud from the beginning.. */
  82        while ((c = *src) != 0) {
  83                if (!crud(c))
  84                        break;
  85                src++;
  86        }
  87
  88        /* Remove crud from the end.. */
  89        len = strlen(src);
  90        while (len > 0) {
  91                c = src[len-1];
  92                if (!crud(c))
  93                        break;
  94                --len;
  95        }
  96
  97        /*
  98         * Copy the rest to the buffer, but avoid the special
  99         * characters '\n' '<' and '>' that act as delimeters on
 100         * a identification line
 101         */
 102        for (i = 0; i < len; i++) {
 103                c = *src++;
 104                switch (c) {
 105                case '\n': case '<': case '>':
 106                        continue;
 107                }
 108                if (offset >= size)
 109                        return size;
 110                buf[offset++] = c;
 111        }
 112        return offset;
 113}
 114
 115char *get_ident(const char *name, const char *email, const char *date_str)
 116{
 117        static char buffer[1000];
 118        char date[50];
 119        int i;
 120
 121        if (!name)
 122                name = real_name;
 123        if (!email)
 124                email = real_email;
 125        strcpy(date, real_date);
 126        if (date_str)
 127                parse_date(date_str, date, sizeof(date));
 128
 129        i = copy(buffer, sizeof(buffer), 0, name);
 130        i = add_raw(buffer, sizeof(buffer), i, " <");
 131        i = copy(buffer, sizeof(buffer), i, email);
 132        i = add_raw(buffer, sizeof(buffer), i, "> ");
 133        i = copy(buffer, sizeof(buffer), i, date);
 134        if (i >= sizeof(buffer))
 135                die("Impossibly long personal identifier");
 136        buffer[i] = 0;
 137        return buffer;
 138}
 139
 140char *git_author_info(void)
 141{
 142        return get_ident(gitenv("GIT_AUTHOR_NAME"), gitenv("GIT_AUTHOR_EMAIL"), gitenv("GIT_AUTHOR_DATE"));
 143}
 144
 145char *git_committer_info(void)
 146{
 147        return get_ident(gitenv("GIT_COMMITTER_NAME"), gitenv("GIT_COMMITTER_EMAIL"), gitenv("GIT_COMMITTER_DATE"));
 148}