| /* |
| * ident.c |
| * |
| * create git identifier lines of the form "name <email> date" |
| * |
| * Copyright (C) 2005 Linus Torvalds |
| */ |
| #include "cache.h" |
| |
| static char git_default_date[50]; |
| |
| #ifdef NO_GECOS_IN_PWENT |
| #define get_gecos(ignored) "&" |
| #else |
| #define get_gecos(struct_passwd) ((struct_passwd)->pw_gecos) |
| #endif |
| |
| static void copy_gecos(const struct passwd *w, char *name, size_t sz) |
| { |
| char *src, *dst; |
| size_t len, nlen; |
| |
| nlen = strlen(w->pw_name); |
| |
| /* Traditionally GECOS field had office phone numbers etc, separated |
| * with commas. Also & stands for capitalized form of the login name. |
| */ |
| |
| for (len = 0, dst = name, src = get_gecos(w); len < sz; src++) { |
| int ch = *src; |
| if (ch != '&') { |
| *dst++ = ch; |
| if (ch == 0 || ch == ',') |
| break; |
| len++; |
| continue; |
| } |
| if (len + nlen < sz) { |
| /* Sorry, Mr. McDonald... */ |
| *dst++ = toupper(*w->pw_name); |
| memcpy(dst, w->pw_name + 1, nlen - 1); |
| dst += nlen - 1; |
| len += nlen; |
| } |
| } |
| if (len < sz) |
| name[len] = 0; |
| else |
| die("Your parents must have hated you!"); |
| |
| } |
| |
| static int add_mailname_host(char *buf, size_t len) |
| { |
| FILE *mailname; |
| |
| mailname = fopen("/etc/mailname", "r"); |
| if (!mailname) { |
| if (errno != ENOENT) |
| warning("cannot open /etc/mailname: %s", |
| strerror(errno)); |
| return -1; |
| } |
| if (!fgets(buf, len, mailname)) { |
| if (ferror(mailname)) |
| warning("cannot read /etc/mailname: %s", |
| strerror(errno)); |
| fclose(mailname); |
| return -1; |
| } |
| /* success! */ |
| fclose(mailname); |
| return 0; |
| } |
| |
| static void add_domainname(char *buf, size_t len) |
| { |
| struct hostent *he; |
| size_t namelen; |
| const char *domainname; |
| |
| if (gethostname(buf, len)) { |
| warning("cannot get host name: %s", strerror(errno)); |
| strlcpy(buf, "(none)", len); |
| return; |
| } |
| namelen = strlen(buf); |
| if (memchr(buf, '.', namelen)) |
| return; |
| |
| he = gethostbyname(buf); |
| buf[namelen++] = '.'; |
| buf += namelen; |
| len -= namelen; |
| if (he && (domainname = strchr(he->h_name, '.'))) |
| strlcpy(buf, domainname + 1, len); |
| else |
| strlcpy(buf, "(none)", len); |
| } |
| |
| static void copy_email(const struct passwd *pw) |
| { |
| /* |
| * Make up a fake email address |
| * (name + '@' + hostname [+ '.' + domainname]) |
| */ |
| size_t len = strlen(pw->pw_name); |
| if (len > sizeof(git_default_email)/2) |
| die("Your sysadmin must hate you!"); |
| memcpy(git_default_email, pw->pw_name, len); |
| git_default_email[len++] = '@'; |
| |
| if (!add_mailname_host(git_default_email + len, |
| sizeof(git_default_email) - len)) |
| return; /* read from "/etc/mailname" (Debian) */ |
| add_domainname(git_default_email + len, |
| sizeof(git_default_email) - len); |
| } |
| |
| static void setup_ident(const char **name, const char **emailp) |
| { |
| struct passwd *pw = NULL; |
| |
| /* Get the name ("gecos") */ |
| if (!*name && !git_default_name[0]) { |
| pw = getpwuid(getuid()); |
| if (!pw) |
| die("You don't exist. Go away!"); |
| copy_gecos(pw, git_default_name, sizeof(git_default_name)); |
| } |
| if (!*name) |
| *name = git_default_name; |
| |
| if (!*emailp && !git_default_email[0]) { |
| const char *email = getenv("EMAIL"); |
| |
| if (email && email[0]) { |
| strlcpy(git_default_email, email, |
| sizeof(git_default_email)); |
| user_ident_explicitly_given |= IDENT_MAIL_GIVEN; |
| } else { |
| if (!pw) |
| pw = getpwuid(getuid()); |
| if (!pw) |
| die("You don't exist. Go away!"); |
| copy_email(pw); |
| } |
| } |
| if (!*emailp) |
| *emailp = git_default_email; |
| |
| /* And set the default date */ |
| if (!git_default_date[0]) |
| datestamp(git_default_date, sizeof(git_default_date)); |
| } |
| |
| static int add_raw(char *buf, size_t size, int offset, const char *str) |
| { |
| size_t len = strlen(str); |
| if (offset + len > size) |
| return size; |
| memcpy(buf + offset, str, len); |
| return offset + len; |
| } |
| |
| static int crud(unsigned char c) |
| { |
| return c <= 32 || |
| c == '.' || |
| c == ',' || |
| c == ':' || |
| c == ';' || |
| c == '<' || |
| c == '>' || |
| c == '"' || |
| c == '\\' || |
| c == '\''; |
| } |
| |
| /* |
| * Copy over a string to the destination, but avoid special |
| * characters ('\n', '<' and '>') and remove crud at the end |
| */ |
| static int copy(char *buf, size_t size, int offset, const char *src) |
| { |
| size_t i, len; |
| unsigned char c; |
| |
| /* Remove crud from the beginning.. */ |
| while ((c = *src) != 0) { |
| if (!crud(c)) |
| break; |
| src++; |
| } |
| |
| /* Remove crud from the end.. */ |
| len = strlen(src); |
| while (len > 0) { |
| c = src[len-1]; |
| if (!crud(c)) |
| break; |
| --len; |
| } |
| |
| /* |
| * Copy the rest to the buffer, but avoid the special |
| * characters '\n' '<' and '>' that act as delimiters on |
| * an identification line |
| */ |
| for (i = 0; i < len; i++) { |
| c = *src++; |
| switch (c) { |
| case '\n': case '<': case '>': |
| continue; |
| } |
| if (offset >= size) |
| return size; |
| buf[offset++] = c; |
| } |
| return offset; |
| } |
| |
| static const char *env_hint = |
| "\n" |
| "*** Please tell me who you are.\n" |
| "\n" |
| "Run\n" |
| "\n" |
| " git config --global user.email \"you@example.com\"\n" |
| " git config --global user.name \"Your Name\"\n" |
| "\n" |
| "to set your account\'s default identity.\n" |
| "Omit --global to set the identity only in this repository.\n" |
| "\n"; |
| |
| const char *fmt_ident(const char *name, const char *email, |
| const char *date_str, int flag) |
| { |
| static char buffer[1000]; |
| char date[50]; |
| int i; |
| int error_on_no_name = (flag & IDENT_ERROR_ON_NO_NAME); |
| int warn_on_no_name = (flag & IDENT_WARN_ON_NO_NAME); |
| int name_addr_only = (flag & IDENT_NO_DATE); |
| |
| setup_ident(&name, &email); |
| |
| if (!*name) { |
| struct passwd *pw; |
| |
| if ((warn_on_no_name || error_on_no_name) && |
| name == git_default_name && env_hint) { |
| fputs(env_hint, stderr); |
| env_hint = NULL; /* warn only once */ |
| } |
| if (error_on_no_name) |
| die("empty ident %s <%s> not allowed", name, email); |
| pw = getpwuid(getuid()); |
| if (!pw) |
| die("You don't exist. Go away!"); |
| strlcpy(git_default_name, pw->pw_name, |
| sizeof(git_default_name)); |
| name = git_default_name; |
| } |
| |
| strcpy(date, git_default_date); |
| if (!name_addr_only && date_str && date_str[0]) { |
| if (parse_date(date_str, date, sizeof(date)) < 0) |
| die("invalid date format: %s", date_str); |
| } |
| |
| i = copy(buffer, sizeof(buffer), 0, name); |
| i = add_raw(buffer, sizeof(buffer), i, " <"); |
| i = copy(buffer, sizeof(buffer), i, email); |
| if (!name_addr_only) { |
| i = add_raw(buffer, sizeof(buffer), i, "> "); |
| i = copy(buffer, sizeof(buffer), i, date); |
| } else { |
| i = add_raw(buffer, sizeof(buffer), i, ">"); |
| } |
| if (i >= sizeof(buffer)) |
| die("Impossibly long personal identifier"); |
| buffer[i] = 0; |
| return buffer; |
| } |
| |
| const char *fmt_name(const char *name, const char *email) |
| { |
| return fmt_ident(name, email, NULL, IDENT_ERROR_ON_NO_NAME | IDENT_NO_DATE); |
| } |
| |
| const char *git_author_info(int flag) |
| { |
| return fmt_ident(getenv("GIT_AUTHOR_NAME"), |
| getenv("GIT_AUTHOR_EMAIL"), |
| getenv("GIT_AUTHOR_DATE"), |
| flag); |
| } |
| |
| const char *git_committer_info(int flag) |
| { |
| if (getenv("GIT_COMMITTER_NAME")) |
| user_ident_explicitly_given |= IDENT_NAME_GIVEN; |
| if (getenv("GIT_COMMITTER_EMAIL")) |
| user_ident_explicitly_given |= IDENT_MAIL_GIVEN; |
| return fmt_ident(getenv("GIT_COMMITTER_NAME"), |
| getenv("GIT_COMMITTER_EMAIL"), |
| getenv("GIT_COMMITTER_DATE"), |
| flag); |
| } |
| |
| int user_ident_sufficiently_given(void) |
| { |
| #ifndef WINDOWS |
| return (user_ident_explicitly_given & IDENT_MAIL_GIVEN); |
| #else |
| return (user_ident_explicitly_given == IDENT_ALL_GIVEN); |
| #endif |
| } |