1 /*
2 * Advanced Linux Sound Architecture Control Program - Support routines
3 * Copyright (c) by Jaroslav Kysela <perex@perex.cz>
4 *
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19 *
20 */
21
22 #include <stdlib.h>
23 #include <stdio.h>
24 #include <stddef.h>
25 #include <unistd.h>
26 #include <fcntl.h>
27 #include <errno.h>
28 #include <ctype.h>
29 #include <dirent.h>
30 #include <syslog.h>
31 #include <sys/stat.h>
32 #include <sys/mman.h>
33
34 #include <alsa/asoundlib.h>
35 #include "alsactl.h"
36
file_map(const char * filename,char ** buf,size_t * bufsize)37 int file_map(const char *filename, char **buf, size_t *bufsize)
38 {
39 struct stat stats;
40 int fd;
41
42 fd = open(filename, O_RDONLY);
43 if (fd < 0) {
44 return -1;
45 }
46
47 if (fstat(fd, &stats) < 0) {
48 close(fd);
49 return -1;
50 }
51
52 *buf = mmap(NULL, stats.st_size, PROT_READ, MAP_SHARED, fd, 0);
53 if (*buf == MAP_FAILED) {
54 close(fd);
55 return -1;
56 }
57 *bufsize = stats.st_size;
58
59 close(fd);
60
61 return 0;
62 }
63
file_unmap(void * buf,size_t bufsize)64 void file_unmap(void *buf, size_t bufsize)
65 {
66 munmap(buf, bufsize);
67 }
68
line_width(const char * buf,size_t bufsize,size_t pos)69 size_t line_width(const char *buf, size_t bufsize, size_t pos)
70 {
71 int esc = 0;
72 size_t count;
73
74 for (count = pos; count < bufsize; count++) {
75 if (!esc && buf[count] == '\n')
76 break;
77 esc = buf[count] == '\\';
78 }
79
80 return count - pos;
81 }
82
initfailed(int cardnumber,const char * reason,int exitcode)83 void initfailed(int cardnumber, const char *reason, int exitcode)
84 {
85 int fp;
86 char *str;
87 char sexitcode[16];
88
89 if (statefile == NULL)
90 return;
91 if (snd_card_get_name(cardnumber, &str) < 0)
92 return;
93 sprintf(sexitcode, "%i", exitcode);
94 fp = open(statefile, O_WRONLY|O_CREAT|O_APPEND, 0644);
95 write(fp, str, strlen(str));
96 write(fp, ":", 1);
97 write(fp, reason, strlen(reason));
98 write(fp, ":", 1);
99 write(fp, sexitcode, strlen(sexitcode));
100 write(fp, "\n", 1);
101 close(fp);
102 free(str);
103 }
104
syslog_(int prio,const char * fcn,long line,const char * fmt,va_list ap)105 static void syslog_(int prio, const char *fcn, long line,
106 const char *fmt, va_list ap)
107 {
108 char buf[1024];
109
110 snprintf(buf, sizeof(buf), "%s: %s:%ld", command, fcn, line);
111 buf[sizeof(buf)-1] = '\0';
112 vsnprintf(buf + strlen(buf), sizeof(buf)-strlen(buf), fmt, ap);
113 buf[sizeof(buf)-1] = '\0';
114 syslog(LOG_INFO, "%s", buf);
115 }
116
info_(const char * fcn,long line,const char * fmt,...)117 void info_(const char *fcn, long line, const char *fmt, ...)
118 {
119 va_list ap;
120
121 va_start(ap, fmt);
122 if (use_syslog) {
123 syslog_(LOG_INFO, fcn, line, fmt, ap);
124 } else {
125 fprintf(stdout, "%s: %s:%ld: ", command, fcn, line);
126 vfprintf(stdout, fmt, ap);
127 putc('\n', stdout);
128 }
129 va_end(ap);
130 }
131
error_(const char * fcn,long line,const char * fmt,...)132 void error_(const char *fcn, long line, const char *fmt, ...)
133 {
134 va_list ap;
135
136 va_start(ap, fmt);
137 if (use_syslog) {
138 syslog_(LOG_ERR, fcn, line, fmt, ap);
139 } else {
140 fprintf(stderr, "%s: %s:%ld: ", command, fcn, line);
141 vfprintf(stderr, fmt, ap);
142 putc('\n', stderr);
143 }
144 va_end(ap);
145 }
146
cerror_(const char * fcn,long line,int cond,const char * fmt,...)147 void cerror_(const char *fcn, long line, int cond, const char *fmt, ...)
148 {
149 va_list ap;
150
151 if (!cond && !debugflag)
152 return;
153 va_start(ap, fmt);
154 if (use_syslog) {
155 syslog_(LOG_ERR, fcn, line, fmt, ap);
156 } else {
157 fprintf(stderr, "%s: %s:%ld: ", command, fcn, line);
158 vfprintf(stderr, fmt, ap);
159 putc('\n', stderr);
160 }
161 va_end(ap);
162 }
163
dbg_(const char * fcn,long line,const char * fmt,...)164 void dbg_(const char *fcn, long line, const char *fmt, ...)
165 {
166 va_list ap;
167
168 if (!debugflag)
169 return;
170 va_start(ap, fmt);
171 if (use_syslog) {
172 syslog_(LOG_DEBUG, fcn, line, fmt, ap);
173 } else {
174 fprintf(stderr, "%s: %s:%ld: ", command, fcn, line);
175 vfprintf(stderr, fmt, ap);
176 putc('\n', stderr);
177 }
178 va_end(ap);
179 }
180