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-rw-r--r--ident.c519
1 files changed, 519 insertions, 0 deletions
diff --git a/ident.c b/ident.c
new file mode 100644
index 0000000000..4fd82d1043
--- /dev/null
+++ b/ident.c
@@ -0,0 +1,519 @@
+/*
+ * ident.c
+ *
+ * create git identifier lines of the form "name <email> date"
+ *
+ * Copyright (C) 2005 Linus Torvalds
+ */
+#include "cache.h"
+
+static struct strbuf git_default_name = STRBUF_INIT;
+static struct strbuf git_default_email = STRBUF_INIT;
+static struct strbuf git_default_date = STRBUF_INIT;
+static int default_email_is_bogus;
+static int default_name_is_bogus;
+
+static int ident_use_config_only;
+
+#define IDENT_NAME_GIVEN 01
+#define IDENT_MAIL_GIVEN 02
+#define IDENT_ALL_GIVEN (IDENT_NAME_GIVEN|IDENT_MAIL_GIVEN)
+static int committer_ident_explicitly_given;
+static int author_ident_explicitly_given;
+static int ident_config_given;
+
+#ifdef NO_GECOS_IN_PWENT
+#define get_gecos(ignored) "&"
+#else
+#define get_gecos(struct_passwd) ((struct_passwd)->pw_gecos)
+#endif
+
+static struct passwd *xgetpwuid_self(int *is_bogus)
+{
+ struct passwd *pw;
+
+ errno = 0;
+ pw = getpwuid(getuid());
+ if (!pw) {
+ static struct passwd fallback;
+ fallback.pw_name = "unknown";
+#ifndef NO_GECOS_IN_PWENT
+ fallback.pw_gecos = "Unknown";
+#endif
+ pw = &fallback;
+ if (is_bogus)
+ *is_bogus = 1;
+ }
+ return pw;
+}
+
+static void copy_gecos(const struct passwd *w, struct strbuf *name)
+{
+ char *src;
+
+ /* Traditionally GECOS field had office phone numbers etc, separated
+ * with commas. Also & stands for capitalized form of the login name.
+ */
+
+ for (src = get_gecos(w); *src && *src != ','; src++) {
+ int ch = *src;
+ if (ch != '&')
+ strbuf_addch(name, ch);
+ else {
+ /* Sorry, Mr. McDonald... */
+ strbuf_addch(name, toupper(*w->pw_name));
+ strbuf_addstr(name, w->pw_name + 1);
+ }
+ }
+}
+
+static int add_mailname_host(struct strbuf *buf)
+{
+ FILE *mailname;
+ struct strbuf mailnamebuf = STRBUF_INIT;
+
+ mailname = fopen("/etc/mailname", "r");
+ if (!mailname) {
+ if (errno != ENOENT)
+ warning("cannot open /etc/mailname: %s",
+ strerror(errno));
+ return -1;
+ }
+ if (strbuf_getline(&mailnamebuf, mailname) == EOF) {
+ if (ferror(mailname))
+ warning("cannot read /etc/mailname: %s",
+ strerror(errno));
+ strbuf_release(&mailnamebuf);
+ fclose(mailname);
+ return -1;
+ }
+ /* success! */
+ strbuf_addbuf(buf, &mailnamebuf);
+ strbuf_release(&mailnamebuf);
+ fclose(mailname);
+ return 0;
+}
+
+static int canonical_name(const char *host, struct strbuf *out)
+{
+ int status = -1;
+
+#ifndef NO_IPV6
+ struct addrinfo hints, *ai;
+ memset (&hints, '\0', sizeof (hints));
+ hints.ai_flags = AI_CANONNAME;
+ if (!getaddrinfo(host, NULL, &hints, &ai)) {
+ if (ai && strchr(ai->ai_canonname, '.')) {
+ strbuf_addstr(out, ai->ai_canonname);
+ status = 0;
+ }
+ freeaddrinfo(ai);
+ }
+#else
+ struct hostent *he = gethostbyname(host);
+ if (he && strchr(he->h_name, '.')) {
+ strbuf_addstr(out, he->h_name);
+ status = 0;
+ }
+#endif /* NO_IPV6 */
+
+ return status;
+}
+
+static void add_domainname(struct strbuf *out, int *is_bogus)
+{
+ char buf[1024];
+
+ if (gethostname(buf, sizeof(buf))) {
+ warning("cannot get host name: %s", strerror(errno));
+ strbuf_addstr(out, "(none)");
+ *is_bogus = 1;
+ return;
+ }
+ if (strchr(buf, '.'))
+ strbuf_addstr(out, buf);
+ else if (canonical_name(buf, out) < 0) {
+ strbuf_addf(out, "%s.(none)", buf);
+ *is_bogus = 1;
+ }
+}
+
+static void copy_email(const struct passwd *pw, struct strbuf *email,
+ int *is_bogus)
+{
+ /*
+ * Make up a fake email address
+ * (name + '@' + hostname [+ '.' + domainname])
+ */
+ strbuf_addstr(email, pw->pw_name);
+ strbuf_addch(email, '@');
+
+ if (!add_mailname_host(email))
+ return; /* read from "/etc/mailname" (Debian) */
+ add_domainname(email, is_bogus);
+}
+
+const char *ident_default_name(void)
+{
+ if (!git_default_name.len) {
+ copy_gecos(xgetpwuid_self(&default_name_is_bogus), &git_default_name);
+ strbuf_trim(&git_default_name);
+ }
+ return git_default_name.buf;
+}
+
+const char *ident_default_email(void)
+{
+ if (!git_default_email.len) {
+ const char *email = getenv("EMAIL");
+
+ if (email && email[0]) {
+ strbuf_addstr(&git_default_email, email);
+ committer_ident_explicitly_given |= IDENT_MAIL_GIVEN;
+ author_ident_explicitly_given |= IDENT_MAIL_GIVEN;
+ } else
+ copy_email(xgetpwuid_self(&default_email_is_bogus),
+ &git_default_email, &default_email_is_bogus);
+ strbuf_trim(&git_default_email);
+ }
+ return git_default_email.buf;
+}
+
+static const char *ident_default_date(void)
+{
+ if (!git_default_date.len)
+ datestamp(&git_default_date);
+ return git_default_date.buf;
+}
+
+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 void strbuf_addstr_without_crud(struct strbuf *sb, 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. We can only remove crud, never add it,
+ * so 'len' is our maximum.
+ */
+ strbuf_grow(sb, len);
+ for (i = 0; i < len; i++) {
+ c = *src++;
+ switch (c) {
+ case '\n': case '<': case '>':
+ continue;
+ }
+ sb->buf[sb->len++] = c;
+ }
+ sb->buf[sb->len] = '\0';
+}
+
+/*
+ * Reverse of fmt_ident(); given an ident line, split the fields
+ * to allow the caller to parse it.
+ * Signal a success by returning 0, but date/tz fields of the result
+ * can still be NULL if the input line only has the name/email part
+ * (e.g. reading from a reflog entry).
+ */
+int split_ident_line(struct ident_split *split, const char *line, int len)
+{
+ const char *cp;
+ size_t span;
+ int status = -1;
+
+ memset(split, 0, sizeof(*split));
+
+ split->name_begin = line;
+ for (cp = line; *cp && cp < line + len; cp++)
+ if (*cp == '<') {
+ split->mail_begin = cp + 1;
+ break;
+ }
+ if (!split->mail_begin)
+ return status;
+
+ for (cp = split->mail_begin - 2; line <= cp; cp--)
+ if (!isspace(*cp)) {
+ split->name_end = cp + 1;
+ break;
+ }
+ if (!split->name_end) {
+ /* no human readable name */
+ split->name_end = split->name_begin;
+ }
+
+ for (cp = split->mail_begin; cp < line + len; cp++)
+ if (*cp == '>') {
+ split->mail_end = cp;
+ break;
+ }
+ if (!split->mail_end)
+ return status;
+
+ /*
+ * Look from the end-of-line to find the trailing ">" of the mail
+ * address, even though we should already know it as split->mail_end.
+ * This can help in cases of broken idents with an extra ">" somewhere
+ * in the email address. Note that we are assuming the timestamp will
+ * never have a ">" in it.
+ *
+ * Note that we will always find some ">" before going off the front of
+ * the string, because will always hit the split->mail_end closing
+ * bracket.
+ */
+ for (cp = line + len - 1; *cp != '>'; cp--)
+ ;
+
+ for (cp = cp + 1; cp < line + len && isspace(*cp); cp++)
+ ;
+ if (line + len <= cp)
+ goto person_only;
+ split->date_begin = cp;
+ span = strspn(cp, "0123456789");
+ if (!span)
+ goto person_only;
+ split->date_end = split->date_begin + span;
+ for (cp = split->date_end; cp < line + len && isspace(*cp); cp++)
+ ;
+ if (line + len <= cp || (*cp != '+' && *cp != '-'))
+ goto person_only;
+ split->tz_begin = cp;
+ span = strspn(cp + 1, "0123456789");
+ if (!span)
+ goto person_only;
+ split->tz_end = split->tz_begin + 1 + span;
+ return 0;
+
+person_only:
+ split->date_begin = NULL;
+ split->date_end = NULL;
+ split->tz_begin = NULL;
+ split->tz_end = NULL;
+ return 0;
+}
+
+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 struct strbuf ident = STRBUF_INIT;
+ int strict = (flag & IDENT_STRICT);
+ int want_date = !(flag & IDENT_NO_DATE);
+ int want_name = !(flag & IDENT_NO_NAME);
+
+ if (want_name) {
+ int using_default = 0;
+ if (!name) {
+ if (strict && ident_use_config_only
+ && !(ident_config_given & IDENT_NAME_GIVEN)) {
+ fputs(env_hint, stderr);
+ die("no name was given and auto-detection is disabled");
+ }
+ name = ident_default_name();
+ using_default = 1;
+ if (strict && default_name_is_bogus) {
+ fputs(env_hint, stderr);
+ die("unable to auto-detect name (got '%s')", name);
+ }
+ }
+ if (!*name) {
+ struct passwd *pw;
+ if (strict) {
+ if (using_default)
+ fputs(env_hint, stderr);
+ die("empty ident name (for <%s>) not allowed", email);
+ }
+ pw = xgetpwuid_self(NULL);
+ name = pw->pw_name;
+ }
+ }
+
+ if (!email) {
+ if (strict && ident_use_config_only
+ && !(ident_config_given & IDENT_MAIL_GIVEN)) {
+ fputs(env_hint, stderr);
+ die("no email was given and auto-detection is disabled");
+ }
+ email = ident_default_email();
+ if (strict && default_email_is_bogus) {
+ fputs(env_hint, stderr);
+ die("unable to auto-detect email address (got '%s')", email);
+ }
+ }
+
+ strbuf_reset(&ident);
+ if (want_name) {
+ strbuf_addstr_without_crud(&ident, name);
+ strbuf_addstr(&ident, " <");
+ }
+ strbuf_addstr_without_crud(&ident, email);
+ if (want_name)
+ strbuf_addch(&ident, '>');
+ if (want_date) {
+ strbuf_addch(&ident, ' ');
+ if (date_str && date_str[0]) {
+ if (parse_date(date_str, &ident) < 0)
+ die("invalid date format: %s", date_str);
+ }
+ else
+ strbuf_addstr(&ident, ident_default_date());
+ }
+
+ return ident.buf;
+}
+
+const char *fmt_name(const char *name, const char *email)
+{
+ return fmt_ident(name, email, NULL, IDENT_STRICT | IDENT_NO_DATE);
+}
+
+const char *git_author_info(int flag)
+{
+ if (getenv("GIT_AUTHOR_NAME"))
+ author_ident_explicitly_given |= IDENT_NAME_GIVEN;
+ if (getenv("GIT_AUTHOR_EMAIL"))
+ author_ident_explicitly_given |= IDENT_MAIL_GIVEN;
+ 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"))
+ committer_ident_explicitly_given |= IDENT_NAME_GIVEN;
+ if (getenv("GIT_COMMITTER_EMAIL"))
+ committer_ident_explicitly_given |= IDENT_MAIL_GIVEN;
+ return fmt_ident(getenv("GIT_COMMITTER_NAME"),
+ getenv("GIT_COMMITTER_EMAIL"),
+ getenv("GIT_COMMITTER_DATE"),
+ flag);
+}
+
+static int ident_is_sufficient(int user_ident_explicitly_given)
+{
+#ifndef WINDOWS
+ return (user_ident_explicitly_given & IDENT_MAIL_GIVEN);
+#else
+ return (user_ident_explicitly_given == IDENT_ALL_GIVEN);
+#endif
+}
+
+int committer_ident_sufficiently_given(void)
+{
+ return ident_is_sufficient(committer_ident_explicitly_given);
+}
+
+int author_ident_sufficiently_given(void)
+{
+ return ident_is_sufficient(author_ident_explicitly_given);
+}
+
+int git_ident_config(const char *var, const char *value, void *data)
+{
+ if (!strcmp(var, "user.useconfigonly")) {
+ ident_use_config_only = git_config_bool(var, value);
+ return 0;
+ }
+
+ if (!strcmp(var, "user.name")) {
+ if (!value)
+ return config_error_nonbool(var);
+ strbuf_reset(&git_default_name);
+ strbuf_addstr(&git_default_name, value);
+ committer_ident_explicitly_given |= IDENT_NAME_GIVEN;
+ author_ident_explicitly_given |= IDENT_NAME_GIVEN;
+ ident_config_given |= IDENT_NAME_GIVEN;
+ return 0;
+ }
+
+ if (!strcmp(var, "user.email")) {
+ if (!value)
+ return config_error_nonbool(var);
+ strbuf_reset(&git_default_email);
+ strbuf_addstr(&git_default_email, value);
+ committer_ident_explicitly_given |= IDENT_MAIL_GIVEN;
+ author_ident_explicitly_given |= IDENT_MAIL_GIVEN;
+ ident_config_given |= IDENT_MAIL_GIVEN;
+ return 0;
+ }
+
+ return 0;
+}
+
+static int buf_cmp(const char *a_begin, const char *a_end,
+ const char *b_begin, const char *b_end)
+{
+ int a_len = a_end - a_begin;
+ int b_len = b_end - b_begin;
+ int min = a_len < b_len ? a_len : b_len;
+ int cmp;
+
+ cmp = memcmp(a_begin, b_begin, min);
+ if (cmp)
+ return cmp;
+
+ return a_len - b_len;
+}
+
+int ident_cmp(const struct ident_split *a,
+ const struct ident_split *b)
+{
+ int cmp;
+
+ cmp = buf_cmp(a->mail_begin, a->mail_end,
+ b->mail_begin, b->mail_end);
+ if (cmp)
+ return cmp;
+
+ return buf_cmp(a->name_begin, a->name_end,
+ b->name_begin, b->name_end);
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-22 03:18:19 +0000