c96f0c8d0a
Now that we accept arbitrary-sized names and email addresses, the only remaining limit is in the actual formatting of the names into a buffer. The current limit is 1000 characters, which is not likely to be reached, but using a strbuf is one less error condition we have to worry about. Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
361 lines
8.1 KiB
C
361 lines
8.1 KiB
C
/*
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* ident.c
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*
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* create git identifier lines of the form "name <email> date"
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*
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* Copyright (C) 2005 Linus Torvalds
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*/
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#include "cache.h"
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static struct strbuf git_default_name = STRBUF_INIT;
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static struct strbuf git_default_email = STRBUF_INIT;
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static char git_default_date[50];
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int user_ident_explicitly_given;
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#ifdef NO_GECOS_IN_PWENT
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#define get_gecos(ignored) "&"
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#else
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#define get_gecos(struct_passwd) ((struct_passwd)->pw_gecos)
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#endif
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static void copy_gecos(const struct passwd *w, struct strbuf *name)
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{
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char *src;
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/* Traditionally GECOS field had office phone numbers etc, separated
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* with commas. Also & stands for capitalized form of the login name.
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*/
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for (src = get_gecos(w); *src && *src != ','; src++) {
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int ch = *src;
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if (ch != '&')
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strbuf_addch(name, ch);
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else {
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/* Sorry, Mr. McDonald... */
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strbuf_addch(name, toupper(*w->pw_name));
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strbuf_addstr(name, w->pw_name + 1);
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}
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}
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}
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static int add_mailname_host(struct strbuf *buf)
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{
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FILE *mailname;
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mailname = fopen("/etc/mailname", "r");
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if (!mailname) {
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if (errno != ENOENT)
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warning("cannot open /etc/mailname: %s",
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strerror(errno));
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return -1;
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}
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if (strbuf_getline(buf, mailname, '\n') == EOF) {
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if (ferror(mailname))
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warning("cannot read /etc/mailname: %s",
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strerror(errno));
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fclose(mailname);
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return -1;
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}
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/* success! */
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fclose(mailname);
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return 0;
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}
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static void add_domainname(struct strbuf *out)
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{
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char buf[1024];
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struct hostent *he;
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if (gethostname(buf, sizeof(buf))) {
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warning("cannot get host name: %s", strerror(errno));
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strbuf_addstr(out, "(none)");
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return;
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}
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if (strchr(buf, '.'))
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strbuf_addstr(out, buf);
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else if ((he = gethostbyname(buf)) && strchr(he->h_name, '.'))
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strbuf_addstr(out, he->h_name);
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else
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strbuf_addf(out, "%s.(none)", buf);
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}
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static void copy_email(const struct passwd *pw, struct strbuf *email)
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{
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/*
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* Make up a fake email address
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* (name + '@' + hostname [+ '.' + domainname])
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*/
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strbuf_addstr(email, pw->pw_name);
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strbuf_addch(email, '@');
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if (!add_mailname_host(email))
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return; /* read from "/etc/mailname" (Debian) */
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add_domainname(email);
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}
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const char *ident_default_name(void)
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{
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if (!git_default_name.len)
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copy_gecos(xgetpwuid_self(), &git_default_name);
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return git_default_name.buf;
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}
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const char *ident_default_email(void)
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{
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if (!git_default_email.len) {
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const char *email = getenv("EMAIL");
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if (email && email[0]) {
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strbuf_addstr(&git_default_email, email);
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user_ident_explicitly_given |= IDENT_MAIL_GIVEN;
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} else
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copy_email(xgetpwuid_self(), &git_default_email);
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}
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return git_default_email.buf;
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}
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const char *ident_default_date(void)
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{
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if (!git_default_date[0])
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datestamp(git_default_date, sizeof(git_default_date));
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return git_default_date;
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}
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static int crud(unsigned char c)
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{
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return c <= 32 ||
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c == '.' ||
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c == ',' ||
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c == ':' ||
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c == ';' ||
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c == '<' ||
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c == '>' ||
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c == '"' ||
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c == '\\' ||
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c == '\'';
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}
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/*
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* Copy over a string to the destination, but avoid special
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* characters ('\n', '<' and '>') and remove crud at the end
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*/
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static void strbuf_addstr_without_crud(struct strbuf *sb, const char *src)
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{
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size_t i, len;
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unsigned char c;
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/* Remove crud from the beginning.. */
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while ((c = *src) != 0) {
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if (!crud(c))
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break;
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src++;
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}
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/* Remove crud from the end.. */
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len = strlen(src);
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while (len > 0) {
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c = src[len-1];
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if (!crud(c))
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break;
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--len;
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}
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/*
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* Copy the rest to the buffer, but avoid the special
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* characters '\n' '<' and '>' that act as delimiters on
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* an identification line. We can only remove crud, never add it,
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* so 'len' is our maximum.
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*/
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strbuf_grow(sb, len);
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for (i = 0; i < len; i++) {
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c = *src++;
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switch (c) {
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case '\n': case '<': case '>':
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continue;
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}
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sb->buf[sb->len++] = c;
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}
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sb->buf[sb->len] = '\0';
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}
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/*
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* Reverse of fmt_ident(); given an ident line, split the fields
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* to allow the caller to parse it.
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* Signal a success by returning 0, but date/tz fields of the result
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* can still be NULL if the input line only has the name/email part
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* (e.g. reading from a reflog entry).
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*/
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int split_ident_line(struct ident_split *split, const char *line, int len)
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{
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const char *cp;
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size_t span;
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int status = -1;
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memset(split, 0, sizeof(*split));
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split->name_begin = line;
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for (cp = line; *cp && cp < line + len; cp++)
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if (*cp == '<') {
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split->mail_begin = cp + 1;
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break;
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}
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if (!split->mail_begin)
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return status;
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for (cp = split->mail_begin - 2; line < cp; cp--)
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if (!isspace(*cp)) {
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split->name_end = cp + 1;
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break;
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}
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if (!split->name_end)
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return status;
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for (cp = split->mail_begin; cp < line + len; cp++)
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if (*cp == '>') {
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split->mail_end = cp;
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break;
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}
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if (!split->mail_end)
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return status;
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for (cp = split->mail_end + 1; cp < line + len && isspace(*cp); cp++)
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;
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if (line + len <= cp)
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goto person_only;
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split->date_begin = cp;
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span = strspn(cp, "0123456789");
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if (!span)
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goto person_only;
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split->date_end = split->date_begin + span;
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for (cp = split->date_end; cp < line + len && isspace(*cp); cp++)
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;
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if (line + len <= cp || (*cp != '+' && *cp != '-'))
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goto person_only;
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split->tz_begin = cp;
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span = strspn(cp + 1, "0123456789");
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if (!span)
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goto person_only;
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split->tz_end = split->tz_begin + 1 + span;
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return 0;
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person_only:
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split->date_begin = NULL;
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split->date_end = NULL;
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split->tz_begin = NULL;
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split->tz_end = NULL;
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return 0;
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}
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static const char *env_hint =
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"\n"
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"*** Please tell me who you are.\n"
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"\n"
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"Run\n"
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"\n"
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" git config --global user.email \"you@example.com\"\n"
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" git config --global user.name \"Your Name\"\n"
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"\n"
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"to set your account\'s default identity.\n"
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"Omit --global to set the identity only in this repository.\n"
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"\n";
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const char *fmt_ident(const char *name, const char *email,
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const char *date_str, int flag)
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{
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static struct strbuf ident = STRBUF_INIT;
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char date[50];
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int error_on_no_name = (flag & IDENT_ERROR_ON_NO_NAME);
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int name_addr_only = (flag & IDENT_NO_DATE);
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if (!name)
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name = ident_default_name();
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if (!email)
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email = ident_default_email();
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if (!*name) {
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struct passwd *pw;
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if (error_on_no_name) {
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if (name == git_default_name.buf)
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fputs(env_hint, stderr);
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die("empty ident %s <%s> not allowed", name, email);
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}
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pw = xgetpwuid_self();
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name = pw->pw_name;
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}
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strcpy(date, ident_default_date());
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if (!name_addr_only && date_str && date_str[0]) {
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if (parse_date(date_str, date, sizeof(date)) < 0)
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die("invalid date format: %s", date_str);
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}
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strbuf_reset(&ident);
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strbuf_addstr_without_crud(&ident, name);
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strbuf_addstr(&ident, " <");
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strbuf_addstr_without_crud(&ident, email);
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strbuf_addch(&ident, '>');
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if (!name_addr_only) {
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strbuf_addch(&ident, ' ');
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strbuf_addstr_without_crud(&ident, date);
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}
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return ident.buf;
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}
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const char *fmt_name(const char *name, const char *email)
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{
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return fmt_ident(name, email, NULL, IDENT_ERROR_ON_NO_NAME | IDENT_NO_DATE);
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}
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const char *git_author_info(int flag)
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{
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return fmt_ident(getenv("GIT_AUTHOR_NAME"),
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getenv("GIT_AUTHOR_EMAIL"),
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getenv("GIT_AUTHOR_DATE"),
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flag);
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}
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const char *git_committer_info(int flag)
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{
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if (getenv("GIT_COMMITTER_NAME"))
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user_ident_explicitly_given |= IDENT_NAME_GIVEN;
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if (getenv("GIT_COMMITTER_EMAIL"))
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user_ident_explicitly_given |= IDENT_MAIL_GIVEN;
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return fmt_ident(getenv("GIT_COMMITTER_NAME"),
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getenv("GIT_COMMITTER_EMAIL"),
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getenv("GIT_COMMITTER_DATE"),
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flag);
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}
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int user_ident_sufficiently_given(void)
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{
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#ifndef WINDOWS
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return (user_ident_explicitly_given & IDENT_MAIL_GIVEN);
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#else
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return (user_ident_explicitly_given == IDENT_ALL_GIVEN);
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#endif
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}
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int git_ident_config(const char *var, const char *value, void *data)
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{
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if (!strcmp(var, "user.name")) {
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if (!value)
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return config_error_nonbool(var);
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strbuf_reset(&git_default_name);
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strbuf_addstr(&git_default_name, value);
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user_ident_explicitly_given |= IDENT_NAME_GIVEN;
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return 0;
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}
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if (!strcmp(var, "user.email")) {
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if (!value)
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return config_error_nonbool(var);
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strbuf_reset(&git_default_email);
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strbuf_addstr(&git_default_email, value);
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user_ident_explicitly_given |= IDENT_MAIL_GIVEN;
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return 0;
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}
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return 0;
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}
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