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47941bd849
proc_put, proc_get and proc_get_hex are used in many files. Avoid duplication by moving them to common/proc_tools.c. Convert azbox's cVideo to use proc_tools.h
60 lines
1.2 KiB
C
60 lines
1.2 KiB
C
/*
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* helper functions to interact with files, usually in the proc filesystem
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*
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* (C) 2012 Stefan Seyfried <seife@tuxboxcvs.slipkontur.de>
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*
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* License: GPLv2 or later
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*
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*/
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include <ctype.h> /* isspace */
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#include <stdio.h> /* sscanf */
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#include "proc_tools.h"
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int proc_put(const char *path, const char *value, const int len)
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{
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int ret, ret2;
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int pfd = open(path, O_WRONLY);
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if (pfd < 0)
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return pfd;
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ret = write(pfd, value, len);
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ret2 = close(pfd);
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if (ret2 < 0)
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return ret2;
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return ret;
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}
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int proc_get(const char *path, char *value, const int len)
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{
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int ret, ret2;
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int pfd = open(path, O_RDONLY);
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if (pfd < 0)
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return pfd;
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ret = read(pfd, value, len);
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value[len-1] = '\0'; /* make sure string is terminated */
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if (ret >= 0)
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{
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while (ret > 0 && isspace(value[ret-1]))
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ret--; /* remove trailing whitespace */
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value[ret] = '\0'; /* terminate, even if ret = 0 */
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}
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ret2 = close(pfd);
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if (ret2 < 0)
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return ret2;
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return ret;
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}
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unsigned int proc_get_hex(const char *path)
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{
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unsigned int n, ret = 0;
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char buf[16];
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n = proc_get(path, buf, 16);
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if (n > 0)
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sscanf(buf, "%x", &ret);
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return ret;
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}
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