forked from servalproject/serval-dna
/
strbuf_helpers.c
195 lines (179 loc) · 4.86 KB
/
strbuf_helpers.c
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/*
Serval string buffer helper functions.
Copyright (C) 2012 Serval Project Inc.
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#include "strbuf_helpers.h"
#include <poll.h>
#include <ctype.h>
#include <string.h>
#include <sys/wait.h>
static inline strbuf _toprint(strbuf sb, char c)
{
if (c == '\0')
strbuf_puts(sb, "\\0");
else if (c == '\n')
strbuf_puts(sb, "\\n");
else if (c == '\r')
strbuf_puts(sb, "\\r");
else if (c == '\t')
strbuf_puts(sb, "\\t");
else if (c == '\\')
strbuf_puts(sb, "\\\\");
else if (c >= ' ' && c <= '~')
strbuf_putc(sb, c);
else
strbuf_sprintf(sb, "\\x%02x", c);
return sb;
}
static strbuf inline _overrun(strbuf sb, const char *suffix)
{
if (strbuf_overrun(sb)) {
strbuf_trunc(sb, -strlen(suffix));
strbuf_puts(sb, suffix);
}
return sb;
}
static strbuf inline _overrun_quote(strbuf sb, char quote, const char *suffix)
{
if (strbuf_overrun(sb)) {
strbuf_trunc(sb, -strlen(suffix) - 1);
strbuf_putc(sb, quote);
strbuf_puts(sb, suffix);
}
return sb;
}
strbuf strbuf_toprint_len(strbuf sb, const char *buf, size_t len)
{
for (; len && !strbuf_overrun(sb); ++buf, --len)
_toprint(sb, *buf);
return _overrun(sb, "...");
}
strbuf strbuf_toprint(strbuf sb, const char *str)
{
for (; *str && !strbuf_overrun(sb); ++str)
_toprint(sb, *str);
return _overrun(sb, "...");
}
strbuf strbuf_toprint_quoted_len(strbuf sb, char quote, const char *buf, size_t len)
{
strbuf_putc(sb, quote);
for (; len && !strbuf_overrun(sb); ++buf, --len)
if (*buf == quote) {
strbuf_putc(sb, '\\');
strbuf_putc(sb, quote);
} else
_toprint(sb, *buf);
strbuf_putc(sb, quote);
return _overrun_quote(sb, quote, "...");
}
strbuf strbuf_toprint_quoted(strbuf sb, char quote, const char *str)
{
strbuf_putc(sb, quote);
for (; *str && !strbuf_overrun(sb); ++str)
if (*str == quote) {
strbuf_putc(sb, '\\');
strbuf_putc(sb, quote);
} else
_toprint(sb, *str);
strbuf_putc(sb, quote);
return _overrun_quote(sb, quote, "...");
}
strbuf strbuf_append_poll_events(strbuf sb, short events)
{
static struct { short flags; const char *name; } symbols[] = {
{ POLLIN, "IN" },
{ POLLPRI, "PRI" },
{ POLLOUT, "OUT" },
{ POLLERR, "ERR" },
{ POLLHUP, "HUP" },
{ POLLNVAL, "NVAL" },
{ POLLRDNORM, "RDNORM" },
{ POLLRDBAND, "RDBAND" },
#ifdef POLLWRNORM
{ POLLWRNORM, "WRNORM" },
#endif
#ifdef POLLWRBAND
{ POLLWRBAND, "WRBAND" },
#endif
#ifdef POLLMSG
{ POLLMSG, "MSG" },
#endif
#ifdef POLLREMOVE
{ POLLREMOVE, "REMOVE" },
#endif
#ifdef POLLRDHUP
{ POLLRDHUP, "RDHUP" },
#endif
{ 0, NULL }
}, *sp;
int n = 0;
for (sp = symbols; sp->name; ++sp) {
if (events & sp->flags) {
if (n)
strbuf_putc(sb, '|');
strbuf_puts(sb, sp->name);
++n;
}
}
if (!n)
strbuf_putc(sb, '0');
return sb;
}
static int is_shellmeta(char c)
{
return !(isalnum(c) || c == '.' || c == '-' || c == '/' || c == ':' || c == '+' || c == '_' || c == ',');
}
strbuf strbuf_append_shell_quote(strbuf sb, const char *word)
{
strbuf_putc(sb, '\'');
const char *p;
for (p = word; *p; ++p)
if (*p == '\'')
strbuf_puts(sb, "'\\''");
else
strbuf_putc(sb, *p);
strbuf_putc(sb, '\'');
return sb;
}
strbuf strbuf_append_shell_quotemeta(strbuf sb, const char *word)
{
const char *p;
int hasmeta = 0;
for (p = word; *p && !hasmeta; ++p)
if (is_shellmeta(*p))
hasmeta = 1;
if (!word[0] || hasmeta)
strbuf_append_shell_quote(sb, word);
else
strbuf_puts(sb, word);
return sb;
}
strbuf strbuf_append_exit_status(strbuf sb, int status)
{
if (WIFEXITED(status))
strbuf_sprintf(sb, "exited normally with status %u", WEXITSTATUS(status));
else if (WIFSIGNALED(status)) {
strbuf_sprintf(sb, "terminated by signal %u (%s)", WTERMSIG(status), strsignal(WTERMSIG(status)));
#ifdef WCOREDUMP
if (WCOREDUMP(status))
strbuf_puts(sb, " and dumped core");
#endif
} else if (WIFSTOPPED(status))
strbuf_sprintf(sb, "stopped by signal %u (%s)", WSTOPSIG(status), strsignal(WSTOPSIG(status)));
#ifdef WIFCONTINUED
else if (WIFCONTINUED(status))
strbuf_sprintf(sb, "continued by signal %u (SIGCONT)", SIGCONT);
#endif
return sb;
}