slstatus

Fork of suckless' slstatus with my personal patches
git clone https://git.instinctive.eu/slstatus.git
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commit 7db4f5cf67df1f2cab3a69a6efe8ae8b37bc70f6
parent a36cb96f274c6dd829b140ffa604074477c7557a
Author: raiz <raiz@firemail.cc>
Date:   Tue, 27 Dec 2016 19:49:31 +0300

add extra error tests to swap_*() && fix bytes_read bug

Diffstat:
Mslstatus.c | 77++++++++++++++++++++++++++++++++++++++---------------------------------------
1 file changed, 38 insertions(+), 39 deletions(-)

diff --git a/slstatus.c b/slstatus.c @@ -443,23 +443,20 @@ swap_free(void) if ((bytes_read = fread(buf, sizeof(char), sizeof(buf), fp)) == 0) { warn("swap_free: read error"); fclose(fp); + return smprintf("%s", UNKNOWN_STR); } buf[bytes_read] = '\0'; fclose(fp); - if (bytes_read == 0 || bytes_read == sizeof(buf)) { - warn("Failed to read from /proc/meminfo"); - return smprintf(UNKNOWN_STR); + if ((match = strstr(buf, "SwapTotal")) == NULL) { + return smprintf("%s", UNKNOWN_STR); } - - match = strstr(buf, "SwapTotal"); sscanf(match, "SwapTotal: %ld kB\n", &total); - if (total == 0) { - return smprintf(UNKNOWN_STR); - } - match = strstr(buf, "SwapFree"); + if ((match = strstr(buf, "SwapFree")) == NULL) { + return smprintf("%s", UNKNOWN_STR); + } sscanf(match, "SwapFree: %ld kB\n", &free); return smprintf("%f", (float)free / 1024 / 1024); @@ -480,20 +477,19 @@ swap_perc(void) return smprintf(UNKNOWN_STR); } - bytes_read = fread(buf, sizeof(char), sizeof(buf), fp); + if ((bytes_read = fread(buf, sizeof(char), sizeof(buf), fp)) == 0) { + warn("swap_perc: read error"); + fclose(fp); + return smprintf("%s", UNKNOWN_STR); + } + buf[bytes_read] = '\0'; fclose(fp); - if (bytes_read == 0 || bytes_read == sizeof(buf)) { - warn("Failed to read from /proc/meminfo"); - return smprintf(UNKNOWN_STR); + if ((match = strstr(buf, "SwapTotal")) == NULL) { + return smprintf("%s", UNKNOWN_STR); } - - match = strstr(buf, "SwapTotal"); sscanf(match, "SwapTotal: %ld kB\n", &total); - if (total == 0) { - return smprintf(UNKNOWN_STR); - } if ((match = strstr(buf, "SwapCached")) == NULL) { return smprintf("%s", UNKNOWN_STR); @@ -505,7 +501,6 @@ swap_perc(void) } sscanf(match, "SwapFree: %ld kB\n", &free); - return smprintf("%d%%", 100 * (total - free - cached) / total); } @@ -523,19 +518,19 @@ swap_total(void) warn("Failed to open file /proc/meminfo"); return smprintf(UNKNOWN_STR); } - bytes_read = fread(buf, sizeof(char), sizeof(buf), fp); + if ((bytes_read = fread(buf, sizeof(char), sizeof(buf), fp)) == 0) { + warn("swap_total: read error"); + fclose(fp); + return smprintf("%s", UNKNOWN_STR); + } + buf[bytes_read] = '\0'; fclose(fp); - if (bytes_read == 0 || bytes_read == sizeof(buf)) { - warn("Failed to read from /proc/meminfo"); - return smprintf(UNKNOWN_STR); - } - match = strstr(buf, "SwapTotal"); - sscanf(match, "SwapTotal: %ld kB\n", &total); - if (total == 0) { - return smprintf(UNKNOWN_STR); + if ((match = strstr(buf, "SwapTotal")) == NULL) { + return smprintf("%s", UNKNOWN_STR); } + sscanf(match, "SwapTotal: %ld kB\n", &total); return smprintf("%f", (float)total / 1024 / 1024); } @@ -554,24 +549,28 @@ swap_used(void) warn("Failed to open file /proc/meminfo"); return smprintf(UNKNOWN_STR); } - bytes_read = fread(buf, sizeof(char), sizeof(buf), fp); + if ((bytes_read = fread(buf, sizeof(char), sizeof(buf), fp)) == 0) { + warn("swap_used: read error"); + fclose(fp); + return smprintf("%s", UNKNOWN_STR); + } + buf[bytes_read] = '\0'; fclose(fp); - if (bytes_read == 0 || bytes_read == sizeof(buf)) { - warn("Failed to read from /proc/meminfo"); - return smprintf(UNKNOWN_STR); - } - match = strstr(buf, "SwapTotal"); - sscanf(match, "SwapTotal: %ld kB\n", &total); - if (total == 0) { - return smprintf(UNKNOWN_STR); + if ((match = strstr(buf, "SwapTotal")) == NULL) { + return smprintf("%s", UNKNOWN_STR); } + sscanf(match, "SwapTotal: %ld kB\n", &total); - match = strstr(buf, "SwapCached"); + if ((match = strstr(buf, "SwapCached")) == NULL) { + return smprintf("%s", UNKNOWN_STR); + } sscanf(match, "SwapCached: %ld kB\n", &cached); - match = strstr(buf, "SwapFree"); + if ((match = strstr(buf, "SwapFree")) == NULL) { + return smprintf("%s", UNKNOWN_STR); + } sscanf(match, "SwapFree: %ld kB\n", &free); return smprintf("%f", (float)(total - free - cached) / 1024 / 1024);