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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-27 12:06:34 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-27 12:06:34 +0000
commit5e61585d76ae77fd5e9e96ebabb57afa4d74880d (patch)
tree2b467823aaeebc7ef8bc9e3cabe8074eaef1666d /src/global/mail_parm_split.c
parentInitial commit. (diff)
downloadpostfix-upstream/3.5.24.tar.xz
postfix-upstream/3.5.24.zip
Adding upstream version 3.5.24.upstream/3.5.24upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'src/global/mail_parm_split.c')
-rw-r--r--src/global/mail_parm_split.c128
1 files changed, 128 insertions, 0 deletions
diff --git a/src/global/mail_parm_split.c b/src/global/mail_parm_split.c
new file mode 100644
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+/*++
+/* NAME
+/* mail_parm_split 3
+/* SUMMARY
+/* split parameter list value
+/* SYNOPSIS
+/* #include <mail_parm_split.h>
+/*
+/* ARGV *mail_parm_split(
+/* const char *name,
+/* const char *value)
+/* DESCRIPTION
+/* mail_parm_split() splits a parameter list value into its
+/* elements, and extracts text from elements that are entirely
+/* enclosed in {}. It uses CHARS_COMMA_SP as list element
+/* delimiters, and CHARS_BRACE for grouping.
+/*
+/* Arguments:
+/* .IP name
+/* Parameter name. This is used to provide context for
+/* error messages.
+/* .IP value
+/* Parameter value.
+/* DIAGNOSTICS
+/* fatal: syntax error while extracting text from {}, such as:
+/* missing closing brace, or text after closing brace.
+/* SEE ALSO
+/* argv_splitq(3), string array utilities
+/* extpar(3), extract text from parentheses
+/* LICENSE
+/* .ad
+/* .fi
+/* The Secure Mailer license must be distributed with this software.
+/* AUTHOR(S)
+/* Wietse Venema
+/* IBM T.J. Watson Research
+/* P.O. Box 704
+/* Yorktown Heights, NY 10598, USA
+/*
+/* Wietse Venema
+/* Google, Inc.
+/* 111 8th Avenue
+/* New York, NY 10011, USA
+/*--*/
+
+ /*
+ * System library.
+ */
+#include <sys_defs.h>
+
+ /*
+ * Utility library.
+ */
+#include <msg.h>
+#include <mymalloc.h>
+#include <stringops.h>
+
+ /*
+ * Global library.
+ */
+#include <mail_params.h>
+#include <mail_parm_split.h>
+
+/* mail_parm_split - split list, extract {text}, errors are fatal */
+
+ARGV *mail_parm_split(const char *name, const char *value)
+{
+ ARGV *argvp = argv_alloc(1);
+ char *saved_string = mystrdup(value);
+ char *bp = saved_string;
+ char *arg;
+ char *err;
+
+ /*
+ * The code that detects the error shall either signal or handle the
+ * error. In this case, mystrtokq() detects no error, extpar() signals
+ * the error to its caller, and this function handles the error.
+ */
+ while ((arg = mystrtokq(&bp, CHARS_COMMA_SP, CHARS_BRACE)) != 0) {
+ if (*arg == CHARS_BRACE[0]
+ && (err = extpar(&arg, CHARS_BRACE, EXTPAR_FLAG_STRIP)) != 0) {
+#ifndef TEST
+ msg_fatal("%s: %s", name, err);
+#else
+ msg_warn("%s: %s", name, err);
+ myfree(err);
+#endif
+ }
+ argv_add(argvp, arg, (char *) 0);
+ }
+ argv_terminate(argvp);
+ myfree(saved_string);
+ return (argvp);
+}
+
+#ifdef TEST
+
+ /*
+ * This function is security-critical so it better have a unit-test driver.
+ */
+#include <string.h>
+#include <vstream.h>
+#include <vstream.h>
+#include <vstring_vstream.h>
+
+int main(void)
+{
+ VSTRING *vp = vstring_alloc(100);
+ ARGV *argv;
+ char *start;
+ char *str;
+ char **cpp;
+
+ while (vstring_fgets_nonl(vp, VSTREAM_IN) && VSTRING_LEN(vp) > 0) {
+ start = vstring_str(vp);
+ vstream_printf("Input:\t>%s<\n", start);
+ vstream_fflush(VSTREAM_OUT);
+ argv = mail_parm_split("stdin", start);
+ for (cpp = argv->argv; (str = *cpp) != 0; cpp++)
+ vstream_printf("Output:\t>%s<\n", str);
+ argv_free(argv);
+ vstream_fflush(VSTREAM_OUT);
+ }
+ vstring_free(vp);
+ return (0);
+}
+
+#endif