114 lines
3.6 KiB
C
114 lines
3.6 KiB
C
/*
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* Copyright (c) 2014, Jamie Beverly.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without modification, are
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* permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this list of
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* conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice, this list
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* of conditions and the following disclaimer in the documentation and/or other materials
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* provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY Jamie Beverly ``AS IS'' AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
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* FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL Jamie Beverly OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
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* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* The views and conclusions contained in the software and documentation are those of the
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* authors and should not be interpreted as representing official policies, either expressed
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* or implied, of Jamie Beverly.
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*/
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#include <stdio.h>
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#include <errno.h>
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#include <string.h>
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#include "includes.h"
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#include "xmalloc.h"
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#include "get_command_line.h"
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#ifdef HAVE_PROC_PID_CMDLINE
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static size_t
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proc_pid_cmdline(char *** inargv)
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{
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pid_t pid;
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FILE *f = NULL;
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char filename[64] = { 0 }, c = '\0';
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char ** argv;
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char argbuf[MAX_LEN_PER_CMDLINE_ARG + 1] = { 0 };
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size_t count = 0, len = 0;
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pid = getpid();
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argv = NULL;
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snprintf(filename, sizeof(filename), "/proc/%d/cmdline", pid);
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f = fopen(filename, "r");
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if (f) {
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while (!feof(f) && count < MAX_CMDLINE_ARGS) {
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if (len > MAX_LEN_PER_CMDLINE_ARG) {
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while (!feof(f) && (c = fgetc(f)) != '\0');
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}
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else {
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c = fgetc(f);
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}
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switch (c) {
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case EOF:
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case '\0':
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if (len > 0) {
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argv = pamsshagentauth_xrealloc(argv, count + 1, sizeof(*argv));
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argv[count] = pamsshagentauth_xcalloc(len + 1, sizeof(*argv[count]));
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strncpy(argv[count++], argbuf, len);
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memset(argbuf, '\0', MAX_LEN_PER_CMDLINE_ARG + 1);
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len = 0;
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}
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break;
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default:
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argbuf[len++] = c;
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break;
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}
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}
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fclose(f);
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}
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*inargv = argv;
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return count;
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}
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#endif
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/*
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* takes a pointer to an unallocated array of arrays of strings, populates the
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* given pointer with the address of the allocated array of strings collected
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*/
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size_t
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pamsshagentauth_get_command_line(char *** argv)
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{
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#ifdef HAVE_PROC_PID_CMDLINE
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return proc_pid_cmdline(argv);
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#else
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/* No other supported implementations at this time */
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return 0;
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#endif
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}
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void
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pamsshagentauth_free_command_line(char ** argv, size_t n_args)
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{
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size_t i;
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for (i = 0; i < n_args; i++)
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pamsshagentauth_xfree(argv[i]);
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pamsshagentauth_xfree(argv);
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return;
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}
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